java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label54_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:08:46,703 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:08:46,705 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:08:46,719 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:08:46,719 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:08:46,720 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:08:46,725 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:08:46,728 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:08:46,729 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:08:46,732 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:08:46,734 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:08:46,734 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:08:46,736 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:08:46,737 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:08:46,743 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:08:46,744 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:08:46,745 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:08:46,752 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:08:46,756 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:08:46,759 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:08:46,761 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:08:46,762 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:08:46,764 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 16:08:46,764 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 16:08:46,764 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 16:08:46,766 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 16:08:46,767 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 16:08:46,770 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 16:08:46,771 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 16:08:46,772 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 16:08:46,772 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 16:08:46,773 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-24 16:08:46,774 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 16:08:46,775 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 16:08:46,776 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 16:08:46,776 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 16:08:46,777 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 16:08:46,805 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:08:46,805 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:08:46,807 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:08:46,807 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:08:46,811 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:08:46,812 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:08:46,812 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:08:46,812 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:08:46,812 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:08:46,812 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:08:46,814 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:08:46,814 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:08:46,814 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:08:46,814 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:08:46,814 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:08:46,815 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:08:46,815 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:08:46,815 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:08:46,815 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:08:46,816 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:08:46,817 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:08:46,817 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:08:46,817 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:08:46,818 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:08:46,818 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:08:46,818 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:08:46,818 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:08:46,818 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:08:46,879 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:08:46,892 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:08:46,896 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:08:46,898 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:08:46,898 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:08:46,899 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label54_true-unreach-call.c [2018-10-24 16:08:46,961 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0a7116495/8a1d84af56ed43e9930e0876b916991d/FLAGfeb2f2ce2 [2018-10-24 16:08:47,565 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:08:47,566 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label54_true-unreach-call.c [2018-10-24 16:08:47,586 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0a7116495/8a1d84af56ed43e9930e0876b916991d/FLAGfeb2f2ce2 [2018-10-24 16:08:47,607 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0a7116495/8a1d84af56ed43e9930e0876b916991d [2018-10-24 16:08:47,621 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:08:47,623 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:08:47,624 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:08:47,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:08:47,628 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:08:47,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:08:47" (1/1) ... [2018-10-24 16:08:47,632 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@498cb451 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:08:47, skipping insertion in model container [2018-10-24 16:08:47,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:08:47" (1/1) ... [2018-10-24 16:08:47,645 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:08:47,715 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:08:48,352 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:08:48,357 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:08:48,609 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:08:48,637 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:08:48,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:08:48 WrapperNode [2018-10-24 16:08:48,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:08:48,639 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:08:48,639 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:08:48,640 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:08:48,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:08:48" (1/1) ... [2018-10-24 16:08:48,695 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:08:48" (1/1) ... [2018-10-24 16:08:48,938 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:08:48,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:08:48,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:08:48,939 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:08:48,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:08:48" (1/1) ... [2018-10-24 16:08:48,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:08:48" (1/1) ... [2018-10-24 16:08:48,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:08:48" (1/1) ... [2018-10-24 16:08:48,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:08:48" (1/1) ... [2018-10-24 16:08:49,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:08:48" (1/1) ... [2018-10-24 16:08:49,034 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:08:48" (1/1) ... [2018-10-24 16:08:49,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:08:48" (1/1) ... [2018-10-24 16:08:49,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:08:49,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:08:49,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:08:49,078 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:08:49,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:08:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:08:49,149 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:08:49,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:08:49,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:08:53,343 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:08:53,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:08:53 BoogieIcfgContainer [2018-10-24 16:08:53,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:08:53,346 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:08:53,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:08:53,350 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:08:53,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:08:47" (1/3) ... [2018-10-24 16:08:53,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f2e2dab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:08:53, skipping insertion in model container [2018-10-24 16:08:53,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:08:48" (2/3) ... [2018-10-24 16:08:53,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f2e2dab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:08:53, skipping insertion in model container [2018-10-24 16:08:53,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:08:53" (3/3) ... [2018-10-24 16:08:53,354 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label54_true-unreach-call.c [2018-10-24 16:08:53,364 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:08:53,374 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:08:53,394 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:08:53,435 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:08:53,436 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:08:53,436 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:08:53,436 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:08:53,436 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:08:53,437 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:08:53,437 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:08:53,437 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:08:53,438 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:08:53,465 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states. [2018-10-24 16:08:53,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-24 16:08:53,475 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:08:53,476 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:08:53,478 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:08:53,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:08:53,486 INFO L82 PathProgramCache]: Analyzing trace with hash -387853398, now seen corresponding path program 1 times [2018-10-24 16:08:53,488 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:08:53,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:08:53,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:53,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:08:53,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:08:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:08:53,955 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:08:53,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:08:53,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:08:53,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:08:53,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:08:53,980 INFO L87 Difference]: Start difference. First operand 284 states. Second operand 4 states. [2018-10-24 16:08:57,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:08:57,750 INFO L93 Difference]: Finished difference Result 974 states and 1747 transitions. [2018-10-24 16:08:57,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:08:57,752 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2018-10-24 16:08:57,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:08:57,777 INFO L225 Difference]: With dead ends: 974 [2018-10-24 16:08:57,777 INFO L226 Difference]: Without dead ends: 683 [2018-10-24 16:08:57,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:08:57,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2018-10-24 16:08:57,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 677. [2018-10-24 16:08:57,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677 states. [2018-10-24 16:08:57,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 1087 transitions. [2018-10-24 16:08:57,886 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 1087 transitions. Word has length 38 [2018-10-24 16:08:57,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:08:57,887 INFO L481 AbstractCegarLoop]: Abstraction has 677 states and 1087 transitions. [2018-10-24 16:08:57,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:08:57,887 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 1087 transitions. [2018-10-24 16:08:57,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-24 16:08:57,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:08:57,893 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:08:57,893 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:08:57,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:08:57,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1847844740, now seen corresponding path program 1 times [2018-10-24 16:08:57,894 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:08:57,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:08:57,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:57,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:08:57,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:08:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:08:58,315 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:08:58,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:08:58,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:08:58,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:08:58,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:08:58,318 INFO L87 Difference]: Start difference. First operand 677 states and 1087 transitions. Second operand 5 states. [2018-10-24 16:09:02,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:09:02,285 INFO L93 Difference]: Finished difference Result 2119 states and 3285 transitions. [2018-10-24 16:09:02,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:09:02,286 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2018-10-24 16:09:02,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:09:02,295 INFO L225 Difference]: With dead ends: 2119 [2018-10-24 16:09:02,295 INFO L226 Difference]: Without dead ends: 1444 [2018-10-24 16:09:02,299 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 [2018-10-24 16:09:02,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2018-10-24 16:09:02,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1240. [2018-10-24 16:09:02,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1240 states. [2018-10-24 16:09:02,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1789 transitions. [2018-10-24 16:09:02,343 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1789 transitions. Word has length 108 [2018-10-24 16:09:02,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:09:02,344 INFO L481 AbstractCegarLoop]: Abstraction has 1240 states and 1789 transitions. [2018-10-24 16:09:02,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:09:02,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1789 transitions. [2018-10-24 16:09:02,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-24 16:09:02,349 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:09:02,350 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:09:02,350 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:09:02,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:09:02,350 INFO L82 PathProgramCache]: Analyzing trace with hash -768396831, now seen corresponding path program 1 times [2018-10-24 16:09:02,351 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:09:02,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:09:02,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:02,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:02,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-10-24 16:09:02,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:09:02,776 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:09:02,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:02,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:09:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:09:03,005 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:09:03,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-24 16:09:03,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:09:03,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:09:03,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:09:03,010 INFO L87 Difference]: Start difference. First operand 1240 states and 1789 transitions. Second operand 4 states. [2018-10-24 16:09:08,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:09:08,809 INFO L93 Difference]: Finished difference Result 3779 states and 5665 transitions. [2018-10-24 16:09:08,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:09:08,810 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 182 [2018-10-24 16:09:08,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:09:08,824 INFO L225 Difference]: With dead ends: 3779 [2018-10-24 16:09:08,825 INFO L226 Difference]: Without dead ends: 2541 [2018-10-24 16:09:08,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:09:08,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2018-10-24 16:09:08,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 1978. [2018-10-24 16:09:08,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1978 states. [2018-10-24 16:09:08,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2674 transitions. [2018-10-24 16:09:08,885 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2674 transitions. Word has length 182 [2018-10-24 16:09:08,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:09:08,886 INFO L481 AbstractCegarLoop]: Abstraction has 1978 states and 2674 transitions. [2018-10-24 16:09:08,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:09:08,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2674 transitions. [2018-10-24 16:09:08,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-24 16:09:08,894 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:09:08,894 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:09:08,894 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:09:08,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:09:08,895 INFO L82 PathProgramCache]: Analyzing trace with hash 546145324, now seen corresponding path program 1 times [2018-10-24 16:09:08,896 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:09:08,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:09:08,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:08,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:08,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-10-24 16:09:09,136 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:09:09,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:09:09,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:09:09,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:09:09,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:09:09,138 INFO L87 Difference]: Start difference. First operand 1978 states and 2674 transitions. Second operand 4 states. [2018-10-24 16:09:13,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:09:13,833 INFO L93 Difference]: Finished difference Result 6746 states and 9325 transitions. [2018-10-24 16:09:13,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:09:13,834 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 188 [2018-10-24 16:09:13,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:09:13,857 INFO L225 Difference]: With dead ends: 6746 [2018-10-24 16:09:13,857 INFO L226 Difference]: Without dead ends: 4770 [2018-10-24 16:09:13,861 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 [2018-10-24 16:09:13,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4770 states. [2018-10-24 16:09:13,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4770 to 4754. [2018-10-24 16:09:13,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4754 states. [2018-10-24 16:09:13,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4754 states to 4754 states and 6178 transitions. [2018-10-24 16:09:13,946 INFO L78 Accepts]: Start accepts. Automaton has 4754 states and 6178 transitions. Word has length 188 [2018-10-24 16:09:13,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:09:13,947 INFO L481 AbstractCegarLoop]: Abstraction has 4754 states and 6178 transitions. [2018-10-24 16:09:13,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:09:13,947 INFO L276 IsEmpty]: Start isEmpty. Operand 4754 states and 6178 transitions. [2018-10-24 16:09:13,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-10-24 16:09:13,952 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:09:13,952 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:09:13,952 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:09:13,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:09:13,953 INFO L82 PathProgramCache]: Analyzing trace with hash 802358184, now seen corresponding path program 1 times [2018-10-24 16:09:13,953 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:09:13,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:09:13,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:13,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:13,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-10-24 16:09:14,389 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:09:14,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:09:14,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:09:14,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:09:14,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:09:14,390 INFO L87 Difference]: Start difference. First operand 4754 states and 6178 transitions. Second operand 4 states. [2018-10-24 16:09:16,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:09:16,798 INFO L93 Difference]: Finished difference Result 12112 states and 15989 transitions. [2018-10-24 16:09:16,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:09:16,798 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 232 [2018-10-24 16:09:16,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:09:16,827 INFO L225 Difference]: With dead ends: 12112 [2018-10-24 16:09:16,828 INFO L226 Difference]: Without dead ends: 7545 [2018-10-24 16:09:16,835 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 [2018-10-24 16:09:16,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7545 states. [2018-10-24 16:09:16,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7545 to 7160. [2018-10-24 16:09:16,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7160 states. [2018-10-24 16:09:16,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7160 states to 7160 states and 9159 transitions. [2018-10-24 16:09:16,968 INFO L78 Accepts]: Start accepts. Automaton has 7160 states and 9159 transitions. Word has length 232 [2018-10-24 16:09:16,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:09:16,969 INFO L481 AbstractCegarLoop]: Abstraction has 7160 states and 9159 transitions. [2018-10-24 16:09:16,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:09:16,970 INFO L276 IsEmpty]: Start isEmpty. Operand 7160 states and 9159 transitions. [2018-10-24 16:09:16,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-10-24 16:09:16,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:09:16,979 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:09:16,979 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:09:16,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:09:16,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1805515545, now seen corresponding path program 1 times [2018-10-24 16:09:16,980 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:09:16,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:09:16,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:16,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:16,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:17,379 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-24 16:09:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:09:17,454 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:09:17,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 16:09:17,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:09:17,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:09:17,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:09:17,456 INFO L87 Difference]: Start difference. First operand 7160 states and 9159 transitions. Second operand 5 states. [2018-10-24 16:09:20,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:09:20,932 INFO L93 Difference]: Finished difference Result 16935 states and 21983 transitions. [2018-10-24 16:09:20,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:09:20,939 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 236 [2018-10-24 16:09:20,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:09:20,972 INFO L225 Difference]: With dead ends: 16935 [2018-10-24 16:09:20,972 INFO L226 Difference]: Without dead ends: 9777 [2018-10-24 16:09:20,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:09:20,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9777 states. [2018-10-24 16:09:21,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9777 to 9573. [2018-10-24 16:09:21,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9573 states. [2018-10-24 16:09:21,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9573 states to 9573 states and 11910 transitions. [2018-10-24 16:09:21,139 INFO L78 Accepts]: Start accepts. Automaton has 9573 states and 11910 transitions. Word has length 236 [2018-10-24 16:09:21,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:09:21,139 INFO L481 AbstractCegarLoop]: Abstraction has 9573 states and 11910 transitions. [2018-10-24 16:09:21,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:09:21,140 INFO L276 IsEmpty]: Start isEmpty. Operand 9573 states and 11910 transitions. [2018-10-24 16:09:21,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-10-24 16:09:21,145 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:09:21,146 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:09:21,146 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:09:21,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:09:21,147 INFO L82 PathProgramCache]: Analyzing trace with hash 686440571, now seen corresponding path program 1 times [2018-10-24 16:09:21,147 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:09:21,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:09:21,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:21,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:21,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:21,718 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 9 [2018-10-24 16:09:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 136 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:09:21,832 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:09:21,832 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:09:21,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:21,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:21,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:09:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:09:22,277 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:09:22,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2018-10-24 16:09:22,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 16:09:22,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 16:09:22,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:09:22,279 INFO L87 Difference]: Start difference. First operand 9573 states and 11910 transitions. Second operand 7 states. [2018-10-24 16:09:27,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:09:27,911 INFO L93 Difference]: Finished difference Result 23404 states and 29625 transitions. [2018-10-24 16:09:27,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 16:09:27,911 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 252 [2018-10-24 16:09:27,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:09:27,942 INFO L225 Difference]: With dead ends: 23404 [2018-10-24 16:09:27,942 INFO L226 Difference]: Without dead ends: 13274 [2018-10-24 16:09:27,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-10-24 16:09:27,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13274 states. [2018-10-24 16:09:28,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13274 to 10857. [2018-10-24 16:09:28,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10857 states. [2018-10-24 16:09:28,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10857 states to 10857 states and 12865 transitions. [2018-10-24 16:09:28,111 INFO L78 Accepts]: Start accepts. Automaton has 10857 states and 12865 transitions. Word has length 252 [2018-10-24 16:09:28,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:09:28,112 INFO L481 AbstractCegarLoop]: Abstraction has 10857 states and 12865 transitions. [2018-10-24 16:09:28,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 16:09:28,112 INFO L276 IsEmpty]: Start isEmpty. Operand 10857 states and 12865 transitions. [2018-10-24 16:09:28,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-10-24 16:09:28,123 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:09:28,123 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:09:28,123 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:09:28,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:09:28,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1339864948, now seen corresponding path program 1 times [2018-10-24 16:09:28,124 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:09:28,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:09:28,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:28,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:28,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:28,647 WARN L179 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-24 16:09:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-10-24 16:09:28,701 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:09:28,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:09:28,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:09:28,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:09:28,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:09:28,702 INFO L87 Difference]: Start difference. First operand 10857 states and 12865 transitions. Second operand 4 states. [2018-10-24 16:09:31,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:09:31,193 INFO L93 Difference]: Finished difference Result 22292 states and 26350 transitions. [2018-10-24 16:09:31,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:09:31,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 298 [2018-10-24 16:09:31,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:09:31,222 INFO L225 Difference]: With dead ends: 22292 [2018-10-24 16:09:31,222 INFO L226 Difference]: Without dead ends: 11437 [2018-10-24 16:09:31,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:09:31,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11437 states. [2018-10-24 16:09:31,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11437 to 10672. [2018-10-24 16:09:31,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10672 states. [2018-10-24 16:09:31,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10672 states to 10672 states and 12366 transitions. [2018-10-24 16:09:31,376 INFO L78 Accepts]: Start accepts. Automaton has 10672 states and 12366 transitions. Word has length 298 [2018-10-24 16:09:31,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:09:31,377 INFO L481 AbstractCegarLoop]: Abstraction has 10672 states and 12366 transitions. [2018-10-24 16:09:31,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:09:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 10672 states and 12366 transitions. [2018-10-24 16:09:31,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2018-10-24 16:09:31,387 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:09:31,387 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:09:31,387 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:09:31,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:09:31,388 INFO L82 PathProgramCache]: Analyzing trace with hash 125047579, now seen corresponding path program 1 times [2018-10-24 16:09:31,388 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:09:31,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:09:31,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:31,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:31,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 160 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-24 16:09:31,813 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:09:31,813 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:09:31,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:31,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:31,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:09:32,057 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-10-24 16:09:32,184 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:09:32,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2018-10-24 16:09:32,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:09:32,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:09:32,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:09:32,185 INFO L87 Difference]: Start difference. First operand 10672 states and 12366 transitions. Second operand 4 states. [2018-10-24 16:09:33,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:09:33,730 INFO L93 Difference]: Finished difference Result 20783 states and 24090 transitions. [2018-10-24 16:09:33,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:09:33,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 301 [2018-10-24 16:09:33,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:09:33,748 INFO L225 Difference]: With dead ends: 20783 [2018-10-24 16:09:33,748 INFO L226 Difference]: Without dead ends: 10113 [2018-10-24 16:09:33,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:09:33,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10113 states. [2018-10-24 16:09:33,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10113 to 9925. [2018-10-24 16:09:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9925 states. [2018-10-24 16:09:33,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9925 states to 9925 states and 11283 transitions. [2018-10-24 16:09:33,878 INFO L78 Accepts]: Start accepts. Automaton has 9925 states and 11283 transitions. Word has length 301 [2018-10-24 16:09:33,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:09:33,879 INFO L481 AbstractCegarLoop]: Abstraction has 9925 states and 11283 transitions. [2018-10-24 16:09:33,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:09:33,879 INFO L276 IsEmpty]: Start isEmpty. Operand 9925 states and 11283 transitions. [2018-10-24 16:09:33,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-10-24 16:09:33,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:09:33,890 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:09:33,891 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:09:33,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:09:33,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1507023947, now seen corresponding path program 1 times [2018-10-24 16:09:33,891 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:09:33,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:09:33,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:33,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:33,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:34,242 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 210 proven. 97 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-10-24 16:09:34,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:09:34,242 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:09:34,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:34,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:09:34,624 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-24 16:09:38,959 WARN L179 SmtUtils]: Spent 3.12 s on a formula simplification. DAG size of input: 555 DAG size of output: 28 [2018-10-24 16:09:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 65 proven. 181 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-10-24 16:09:39,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:09:39,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2018-10-24 16:09:39,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 16:09:39,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 16:09:39,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-10-24 16:09:39,313 INFO L87 Difference]: Start difference. First operand 9925 states and 11283 transitions. Second operand 9 states. [2018-10-24 16:10:52,302 WARN L179 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2018-10-24 16:10:59,874 WARN L179 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2018-10-24 16:11:02,948 WARN L179 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2018-10-24 16:11:04,701 WARN L179 SmtUtils]: Spent 556.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-10-24 16:11:13,953 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 15 [2018-10-24 16:11:32,436 WARN L179 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 32 [2018-10-24 16:11:58,704 WARN L179 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2018-10-24 16:12:21,081 WARN L179 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2018-10-24 16:12:41,692 WARN L179 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 34 Received shutdown request... [2018-10-24 16:13:13,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-24 16:13:13,547 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 16:13:13,553 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 16:13:13,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:13:13 BoogieIcfgContainer [2018-10-24 16:13:13,553 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 16:13:13,554 INFO L168 Benchmark]: Toolchain (without parser) took 265932.38 ms. Allocated memory was 1.5 GB in the beginning and 2.9 GB in the end (delta: 1.4 GB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -285.1 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-10-24 16:13:13,555 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 16:13:13,555 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1014.45 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: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2018-10-24 16:13:13,556 INFO L168 Benchmark]: Boogie Procedure Inliner took 299.43 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 727.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -821.0 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2018-10-24 16:13:13,559 INFO L168 Benchmark]: Boogie Preprocessor took 139.38 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2018-10-24 16:13:13,559 INFO L168 Benchmark]: RCFGBuilder took 4266.77 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 173.2 MB). Peak memory consumption was 173.2 MB. Max. memory is 7.1 GB. [2018-10-24 16:13:13,560 INFO L168 Benchmark]: TraceAbstraction took 260207.07 ms. Allocated memory was 2.2 GB in the beginning and 2.9 GB in the end (delta: 702.5 MB). Free memory was 2.0 GB in the beginning and 1.7 GB in the end (delta: 271.9 MB). Peak memory consumption was 974.4 MB. Max. memory is 7.1 GB. [2018-10-24 16:13:13,571 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1014.45 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: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 299.43 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 727.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -821.0 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 139.38 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4266.77 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 173.2 MB). Peak memory consumption was 173.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 260207.07 ms. Allocated memory was 2.2 GB in the beginning and 2.9 GB in the end (delta: 702.5 MB). Free memory was 2.0 GB in the beginning and 1.7 GB in the end (delta: 271.9 MB). Peak memory consumption was 974.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 117]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 117). Cancelled while BasicCegarLoop was constructing difference of abstraction (9925states) and FLOYD_HOARE automaton (currently 30 states, 9 states before enhancement),while ReachableStatesComputation was computing reachable states (18945 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 284 locations, 1 error locations. TIMEOUT Result, 260.1s OverallTime, 10 OverallIterations, 4 TraceHistogramMax, 248.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2491 SDtfs, 8184 SDslu, 2059 SDs, 0 SdLazy, 21711 SolverSat, 3880 SolverUnsat, 15 SolverUnknown, 0 SolverNotchecked, 230.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1117 GetRequests, 1058 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 17.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10857occurred in iteration=7, 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: 0.9s AutomataMinimizationTime, 9 MinimizatonAttempts, 4748 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 8.8s InterpolantComputationTime, 3208 NumberOfCodeBlocks, 3208 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 3194 ConstructedInterpolants, 36 QuantifiedInterpolants, 3457471 SizeOfPredicates, 5 NumberOfNonLiveVariables, 1439 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 14 InterpolantComputations, 9 PerfectInterpolantSequences, 1920/2215 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown