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/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label12_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 23:19:50,700 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 23:19:50,703 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 23:19:50,716 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 23:19:50,716 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 23:19:50,717 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 23:19:50,719 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 23:19:50,721 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 23:19:50,722 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 23:19:50,723 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 23:19:50,724 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 23:19:50,725 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 23:19:50,726 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 23:19:50,727 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 23:19:50,728 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 23:19:50,729 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 23:19:50,730 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 23:19:50,731 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 23:19:50,734 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 23:19:50,735 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 23:19:50,736 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 23:19:50,738 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 23:19:50,740 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 23:19:50,758 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-23 23:19:50,788 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 23:19:50,788 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 23:19:50,789 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 23:19:50,790 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-23 23:19:50,791 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-23 23:19:50,791 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-23 23:19:50,791 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-23 23:19:50,791 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-23 23:19:50,792 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-23 23:19:50,792 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-23 23:19:50,792 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-23 23:19:50,792 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-23 23:19:50,793 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 23:19:50,794 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 23:19:50,794 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 23:19:50,794 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 23:19:50,794 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 23:19:50,794 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 23:19:50,796 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 23:19:50,796 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 23:19:50,797 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 23:19:50,797 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 23:19:50,797 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 23:19:50,798 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 23:19:50,798 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 23:19:50,798 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 23:19:50,799 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 23:19:50,799 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 23:19:50,799 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-23 23:19:50,799 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 23:19:50,799 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 23:19:50,799 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 23:19:50,800 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 23:19:50,800 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-23 23:19:50,870 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 23:19:50,887 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 23:19:50,892 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 23:19:50,893 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 23:19:50,894 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 23:19:50,895 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label12_true-unreach-call_false-termination.c [2018-10-23 23:19:50,969 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bd15c3f63/34d5be1b7be24c298669a961548d6c9b/FLAG02e828c69 [2018-10-23 23:19:51,579 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 23:19:51,580 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label12_true-unreach-call_false-termination.c [2018-10-23 23:19:51,605 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bd15c3f63/34d5be1b7be24c298669a961548d6c9b/FLAG02e828c69 [2018-10-23 23:19:51,626 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bd15c3f63/34d5be1b7be24c298669a961548d6c9b [2018-10-23 23:19:51,638 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 23:19:51,640 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 23:19:51,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 23:19:51,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 23:19:51,645 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 23:19:51,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 11:19:51" (1/1) ... [2018-10-23 23:19:51,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@309cd1a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:19:51, skipping insertion in model container [2018-10-23 23:19:51,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 11:19:51" (1/1) ... [2018-10-23 23:19:51,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 23:19:51,733 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 23:19:52,210 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 23:19:52,220 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 23:19:52,372 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 23:19:52,392 INFO L193 MainTranslator]: Completed translation [2018-10-23 23:19:52,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:19:52 WrapperNode [2018-10-23 23:19:52,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 23:19:52,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 23:19:52,394 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 23:19:52,394 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 23:19:52,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:19:52" (1/1) ... [2018-10-23 23:19:52,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:19:52" (1/1) ... [2018-10-23 23:19:52,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 23:19:52,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 23:19:52,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 23:19:52,578 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 23:19:52,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:19:52" (1/1) ... [2018-10-23 23:19:52,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:19:52" (1/1) ... [2018-10-23 23:19:52,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:19:52" (1/1) ... [2018-10-23 23:19:52,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:19:52" (1/1) ... [2018-10-23 23:19:52,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:19:52" (1/1) ... [2018-10-23 23:19:52,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:19:52" (1/1) ... [2018-10-23 23:19:52,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:19:52" (1/1) ... [2018-10-23 23:19:52,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 23:19:52,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 23:19:52,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 23:19:52,682 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 23:19:52,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:19:52" (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 23:19:52,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-23 23:19:52,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-23 23:19:52,760 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-23 23:19:52,760 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-23 23:19:52,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 23:19:52,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 23:19:52,761 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-23 23:19:52,761 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-23 23:19:56,249 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 23:19:56,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 11:19:56 BoogieIcfgContainer [2018-10-23 23:19:56,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 23:19:56,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 23:19:56,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 23:19:56,255 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 23:19:56,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 11:19:51" (1/3) ... [2018-10-23 23:19:56,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72afe73b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 11:19:56, skipping insertion in model container [2018-10-23 23:19:56,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:19:52" (2/3) ... [2018-10-23 23:19:56,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72afe73b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 11:19:56, skipping insertion in model container [2018-10-23 23:19:56,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 11:19:56" (3/3) ... [2018-10-23 23:19:56,259 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label12_true-unreach-call_false-termination.c [2018-10-23 23:19:56,280 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 23:19:56,296 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 23:19:56,315 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 23:19:56,359 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 23:19:56,359 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 23:19:56,359 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 23:19:56,360 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 23:19:56,360 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 23:19:56,360 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 23:19:56,360 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 23:19:56,360 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 23:19:56,388 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states. [2018-10-23 23:19:56,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-23 23:19:56,404 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 23:19:56,406 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:19:56,410 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 23:19:56,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 23:19:56,415 INFO L82 PathProgramCache]: Analyzing trace with hash -426831369, now seen corresponding path program 1 times [2018-10-23 23:19:56,417 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 23:19:56,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 23:19:56,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 23:19:56,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 23:19:56,468 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 23:19:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 23:19:57,071 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 23:19:57,074 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 23:19:57,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 23:19:57,074 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 23:19:57,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 23:19:57,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 23:19:57,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 23:19:57,104 INFO L87 Difference]: Start difference. First operand 237 states. Second operand 3 states. [2018-10-23 23:19:58,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 23:19:58,787 INFO L93 Difference]: Finished difference Result 621 states and 1059 transitions. [2018-10-23 23:19:58,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 23:19:58,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2018-10-23 23:19:58,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 23:19:58,809 INFO L225 Difference]: With dead ends: 621 [2018-10-23 23:19:58,810 INFO L226 Difference]: Without dead ends: 382 [2018-10-23 23:19:58,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 23:19:58,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2018-10-23 23:19:58,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2018-10-23 23:19:58,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2018-10-23 23:19:58,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 608 transitions. [2018-10-23 23:19:58,897 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 608 transitions. Word has length 125 [2018-10-23 23:19:58,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 23:19:58,900 INFO L481 AbstractCegarLoop]: Abstraction has 382 states and 608 transitions. [2018-10-23 23:19:58,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 23:19:58,900 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 608 transitions. [2018-10-23 23:19:58,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-23 23:19:58,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 23:19:58,909 INFO L375 BasicCegarLoop]: trace histogram [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 23:19:58,909 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 23:19:58,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 23:19:58,910 INFO L82 PathProgramCache]: Analyzing trace with hash 973432330, now seen corresponding path program 1 times [2018-10-23 23:19:58,910 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 23:19:58,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 23:19:58,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 23:19:58,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 23:19:58,919 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 23:19:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 23:19:59,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 23:19:59,275 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 23:19:59,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 23:19:59,276 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 23:19:59,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 23:19:59,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 23:19:59,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 23:19:59,279 INFO L87 Difference]: Start difference. First operand 382 states and 608 transitions. Second operand 5 states. [2018-10-23 23:20:00,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 23:20:00,801 INFO L93 Difference]: Finished difference Result 903 states and 1497 transitions. [2018-10-23 23:20:00,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 23:20:00,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2018-10-23 23:20:00,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 23:20:00,806 INFO L225 Difference]: With dead ends: 903 [2018-10-23 23:20:00,806 INFO L226 Difference]: Without dead ends: 381 [2018-10-23 23:20:00,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 23:20:00,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2018-10-23 23:20:00,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 381. [2018-10-23 23:20:00,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2018-10-23 23:20:00,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 602 transitions. [2018-10-23 23:20:00,837 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 602 transitions. Word has length 134 [2018-10-23 23:20:00,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 23:20:00,837 INFO L481 AbstractCegarLoop]: Abstraction has 381 states and 602 transitions. [2018-10-23 23:20:00,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 23:20:00,838 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 602 transitions. [2018-10-23 23:20:00,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-23 23:20:00,840 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 23:20:00,841 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 23:20:00,841 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 23:20:00,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 23:20:00,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1888571286, now seen corresponding path program 1 times [2018-10-23 23:20:00,842 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 23:20:00,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 23:20:00,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 23:20:00,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 23:20:00,844 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 23:20:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 23:20:01,635 WARN L179 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2018-10-23 23:20:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 23:20:01,799 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 23:20:01,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 23:20:01,799 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 23:20:01,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 23:20:01,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 23:20:01,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 23:20:01,801 INFO L87 Difference]: Start difference. First operand 381 states and 602 transitions. Second operand 5 states. [2018-10-23 23:20:03,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 23:20:03,589 INFO L93 Difference]: Finished difference Result 901 states and 1482 transitions. [2018-10-23 23:20:03,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 23:20:03,589 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 140 [2018-10-23 23:20:03,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 23:20:03,592 INFO L225 Difference]: With dead ends: 901 [2018-10-23 23:20:03,593 INFO L226 Difference]: Without dead ends: 380 [2018-10-23 23:20:03,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 23:20:03,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2018-10-23 23:20:03,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2018-10-23 23:20:03,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2018-10-23 23:20:03,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 594 transitions. [2018-10-23 23:20:03,614 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 594 transitions. Word has length 140 [2018-10-23 23:20:03,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 23:20:03,615 INFO L481 AbstractCegarLoop]: Abstraction has 380 states and 594 transitions. [2018-10-23 23:20:03,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 23:20:03,615 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 594 transitions. [2018-10-23 23:20:03,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-23 23:20:03,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 23:20:03,618 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 23:20:03,618 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 23:20:03,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 23:20:03,618 INFO L82 PathProgramCache]: Analyzing trace with hash -570889491, now seen corresponding path program 1 times [2018-10-23 23:20:03,619 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 23:20:03,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 23:20:03,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 23:20:03,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 23:20:03,620 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 23:20:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 23:20:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 23:20:03,831 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 23:20:03,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 23:20:03,832 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 23:20:03,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 23:20:03,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 23:20:03,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-23 23:20:03,833 INFO L87 Difference]: Start difference. First operand 380 states and 594 transitions. Second operand 6 states. [2018-10-23 23:20:06,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 23:20:06,900 INFO L93 Difference]: Finished difference Result 1193 states and 1942 transitions. [2018-10-23 23:20:06,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 23:20:06,901 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 148 [2018-10-23 23:20:06,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 23:20:06,908 INFO L225 Difference]: With dead ends: 1193 [2018-10-23 23:20:06,908 INFO L226 Difference]: Without dead ends: 819 [2018-10-23 23:20:06,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-23 23:20:06,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2018-10-23 23:20:06,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 807. [2018-10-23 23:20:06,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 807 states. [2018-10-23 23:20:06,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1208 transitions. [2018-10-23 23:20:06,960 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1208 transitions. Word has length 148 [2018-10-23 23:20:06,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 23:20:06,961 INFO L481 AbstractCegarLoop]: Abstraction has 807 states and 1208 transitions. [2018-10-23 23:20:06,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 23:20:06,961 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1208 transitions. [2018-10-23 23:20:06,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-23 23:20:06,965 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 23:20:06,965 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:20:06,965 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 23:20:06,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 23:20:06,966 INFO L82 PathProgramCache]: Analyzing trace with hash -489152655, now seen corresponding path program 1 times [2018-10-23 23:20:06,966 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 23:20:06,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 23:20:06,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 23:20:06,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 23:20:06,968 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 23:20:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 23:20:07,373 WARN L179 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-10-23 23:20:07,579 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-23 23:20:07,653 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 23:20:07,654 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 23:20:07,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 23:20:07,654 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 23:20:07,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 23:20:07,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 23:20:07,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 23:20:07,656 INFO L87 Difference]: Start difference. First operand 807 states and 1208 transitions. Second operand 5 states. [2018-10-23 23:20:08,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 23:20:08,823 INFO L93 Difference]: Finished difference Result 1753 states and 2669 transitions. [2018-10-23 23:20:08,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 23:20:08,826 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2018-10-23 23:20:08,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 23:20:08,834 INFO L225 Difference]: With dead ends: 1753 [2018-10-23 23:20:08,834 INFO L226 Difference]: Without dead ends: 804 [2018-10-23 23:20:08,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 23:20:08,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2018-10-23 23:20:08,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 804. [2018-10-23 23:20:08,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 804 states. [2018-10-23 23:20:08,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1190 transitions. [2018-10-23 23:20:08,873 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1190 transitions. Word has length 150 [2018-10-23 23:20:08,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 23:20:08,874 INFO L481 AbstractCegarLoop]: Abstraction has 804 states and 1190 transitions. [2018-10-23 23:20:08,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 23:20:08,874 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1190 transitions. [2018-10-23 23:20:08,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-23 23:20:08,878 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 23:20:08,878 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:20:08,878 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 23:20:08,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 23:20:08,879 INFO L82 PathProgramCache]: Analyzing trace with hash -603913227, now seen corresponding path program 1 times [2018-10-23 23:20:08,879 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 23:20:08,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 23:20:08,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 23:20:08,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 23:20:08,880 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 23:20:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 23:20:09,309 WARN L179 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-10-23 23:20:09,555 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-23 23:20:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 23:20:09,634 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 23:20:09,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 23:20:09,634 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 23:20:09,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 23:20:09,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 23:20:09,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 23:20:09,636 INFO L87 Difference]: Start difference. First operand 804 states and 1190 transitions. Second operand 5 states. [2018-10-23 23:20:11,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 23:20:11,127 INFO L93 Difference]: Finished difference Result 1747 states and 2630 transitions. [2018-10-23 23:20:11,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 23:20:11,128 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2018-10-23 23:20:11,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 23:20:11,134 INFO L225 Difference]: With dead ends: 1747 [2018-10-23 23:20:11,134 INFO L226 Difference]: Without dead ends: 801 [2018-10-23 23:20:11,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 23:20:11,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2018-10-23 23:20:11,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 801. [2018-10-23 23:20:11,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 801 states. [2018-10-23 23:20:11,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1169 transitions. [2018-10-23 23:20:11,162 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1169 transitions. Word has length 152 [2018-10-23 23:20:11,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 23:20:11,163 INFO L481 AbstractCegarLoop]: Abstraction has 801 states and 1169 transitions. [2018-10-23 23:20:11,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 23:20:11,163 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1169 transitions. [2018-10-23 23:20:11,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-23 23:20:11,167 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 23:20:11,167 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:20:11,167 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 23:20:11,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 23:20:11,168 INFO L82 PathProgramCache]: Analyzing trace with hash 931126525, now seen corresponding path program 1 times [2018-10-23 23:20:11,168 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 23:20:11,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 23:20:11,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 23:20:11,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 23:20:11,169 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 23:20:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 23:20:11,415 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-23 23:20:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 23:20:11,458 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 23:20:11,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 23:20:11,458 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 23:20:11,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 23:20:11,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 23:20:11,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-23 23:20:11,459 INFO L87 Difference]: Start difference. First operand 801 states and 1169 transitions. Second operand 6 states. [2018-10-23 23:20:12,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 23:20:12,581 INFO L93 Difference]: Finished difference Result 2381 states and 3621 transitions. [2018-10-23 23:20:12,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 23:20:12,582 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 156 [2018-10-23 23:20:12,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 23:20:12,592 INFO L225 Difference]: With dead ends: 2381 [2018-10-23 23:20:12,592 INFO L226 Difference]: Without dead ends: 1586 [2018-10-23 23:20:12,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-23 23:20:12,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2018-10-23 23:20:12,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1558. [2018-10-23 23:20:12,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1558 states. [2018-10-23 23:20:12,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 2225 transitions. [2018-10-23 23:20:12,642 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 2225 transitions. Word has length 156 [2018-10-23 23:20:12,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 23:20:12,643 INFO L481 AbstractCegarLoop]: Abstraction has 1558 states and 2225 transitions. [2018-10-23 23:20:12,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 23:20:12,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 2225 transitions. [2018-10-23 23:20:12,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-23 23:20:12,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 23:20:12,648 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:20:12,648 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 23:20:12,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 23:20:12,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1732925114, now seen corresponding path program 1 times [2018-10-23 23:20:12,649 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 23:20:12,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 23:20:12,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 23:20:12,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 23:20:12,650 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 23:20:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 23:20:12,925 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-23 23:20:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 23:20:13,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 23:20:13,398 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 23:20:13,399 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 163 with the following transitions: [2018-10-23 23:20:13,401 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [25], [26], [30], [34], [38], [42], [53], [64], [68], [72], [75], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [152], [156], [160], [171], [175], [179], [183], [187], [191], [195], [199], [210], [214], [218], [222], [233], [237], [241], [245], [249], [253], [257], [268], [272], [283], [287], [298], [309], [313], [317], [321], [325], [329], [333], [344], [348], [352], [356], [360], [364], [368], [372], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [531], [539], [547], [555], [563], [571], [579], [587], [595], [603], [611], [619], [627], [635], [643], [651], [659], [667], [671], [673], [863], [867], [871], [877], [881], [883], [888], [889], [890], [892], [893] [2018-10-23 23:20:13,471 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 23:20:13,472 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 23:21:35,359 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-23 23:21:35,361 INFO L272 AbstractInterpreter]: Visited 130 different actions 506 times. Merged at 7 different actions 21 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 38 variables. [2018-10-23 23:21:35,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 23:21:35,407 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-23 23:21:35,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 23:21:35,407 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 23:21:35,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 23:21:35,417 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 23:21:35,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 23:21:35,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 23:21:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-10-23 23:21:35,826 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 23:21:36,071 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-10-23 23:21:36,095 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-23 23:21:36,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2018-10-23 23:21:36,095 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 23:21:36,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 23:21:36,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 23:21:36,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-10-23 23:21:36,097 INFO L87 Difference]: Start difference. First operand 1558 states and 2225 transitions. Second operand 3 states. [2018-10-23 23:21:38,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 23:21:38,786 INFO L93 Difference]: Finished difference Result 3798 states and 5500 transitions. [2018-10-23 23:21:38,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 23:21:38,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 162 [2018-10-23 23:21:38,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 23:21:38,800 INFO L225 Difference]: With dead ends: 3798 [2018-10-23 23:21:38,800 INFO L226 Difference]: Without dead ends: 2246 [2018-10-23 23:21:38,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 325 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-10-23 23:21:38,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2018-10-23 23:21:38,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 2246. [2018-10-23 23:21:38,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2246 states. [2018-10-23 23:21:38,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2246 states to 2246 states and 3096 transitions. [2018-10-23 23:21:38,868 INFO L78 Accepts]: Start accepts. Automaton has 2246 states and 3096 transitions. Word has length 162 [2018-10-23 23:21:38,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 23:21:38,868 INFO L481 AbstractCegarLoop]: Abstraction has 2246 states and 3096 transitions. [2018-10-23 23:21:38,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 23:21:38,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2246 states and 3096 transitions. [2018-10-23 23:21:38,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-23 23:21:38,878 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 23:21:38,878 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, 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] [2018-10-23 23:21:38,878 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 23:21:38,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 23:21:38,879 INFO L82 PathProgramCache]: Analyzing trace with hash 30439215, now seen corresponding path program 1 times [2018-10-23 23:21:38,879 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 23:21:38,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 23:21:38,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 23:21:38,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 23:21:38,881 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 23:21:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 23:21:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 23:21:39,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 23:21:39,066 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 23:21:39,066 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 192 with the following transitions: [2018-10-23 23:21:39,066 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [26], [30], [34], [38], [42], [53], [64], [68], [72], [76], [80], [84], [88], [92], [96], [100], [104], [107], [108], [112], [116], [120], [123], [124], [128], [132], [136], [140], [144], [148], [152], [156], [160], [171], [175], [179], [183], [187], [191], [195], [199], [210], [214], [218], [222], [233], [237], [241], [245], [249], [253], [257], [268], [272], [283], [287], [298], [309], [313], [317], [321], [325], [329], [333], [344], [348], [352], [356], [360], [364], [368], [372], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [531], [539], [547], [555], [563], [571], [579], [587], [595], [603], [611], [619], [627], [635], [643], [651], [659], [667], [671], [673], [863], [867], [871], [877], [881], [883], [888], [889], [890], [892], [893] [2018-10-23 23:21:39,076 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 23:21:39,076 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 23:22:08,910 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-23 23:22:08,911 INFO L272 AbstractInterpreter]: Visited 129 different actions 252 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 38 variables. [2018-10-23 23:22:08,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 23:22:08,923 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-23 23:22:15,993 INFO L232 lantSequenceWeakener]: Weakened 61 states. On average, predicates are now at 82.46% of their original sizes. [2018-10-23 23:22:15,994 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-23 23:23:32,415 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-23 23:23:32,416 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 23:23:32,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [26] imperfect sequences [6] total 30 [2018-10-23 23:23:32,417 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 23:23:32,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-23 23:23:32,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-23 23:23:32,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2018-10-23 23:23:32,418 INFO L87 Difference]: Start difference. First operand 2246 states and 3096 transitions. Second operand 26 states. Received shutdown request... [2018-10-23 23:24:00,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 23:24:00,640 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 23:24:00,644 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 23:24:00,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 11:24:00 BoogieIcfgContainer [2018-10-23 23:24:00,645 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 23:24:00,645 INFO L168 Benchmark]: Toolchain (without parser) took 249006.58 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -51.2 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-10-23 23:24:00,647 INFO L168 Benchmark]: CDTParser took 0.24 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. [2018-10-23 23:24:00,651 INFO L168 Benchmark]: CACSL2BoogieTranslator took 752.23 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2018-10-23 23:24:00,652 INFO L168 Benchmark]: Boogie Procedure Inliner took 184.29 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 718.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -797.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. [2018-10-23 23:24:00,653 INFO L168 Benchmark]: Boogie Preprocessor took 103.63 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. [2018-10-23 23:24:00,654 INFO L168 Benchmark]: RCFGBuilder took 3568.30 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 2.0 GB in the end (delta: 106.3 MB). Peak memory consumption was 106.3 MB. Max. memory is 7.1 GB. [2018-10-23 23:24:00,654 INFO L168 Benchmark]: TraceAbstraction took 244393.68 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.0 GB in the beginning and 1.5 GB in the end (delta: 581.1 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-10-23 23:24:00,660 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 752.23 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 184.29 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 718.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -797.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 103.63 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3568.30 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 2.0 GB in the end (delta: 106.3 MB). Peak memory consumption was 106.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 244393.68 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.0 GB in the beginning and 1.5 GB in the end (delta: 581.1 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 526]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 526). Cancelled while BasicCegarLoop was constructing difference of abstraction (2246states) and FLOYD_HOARE automaton (currently 11 states, 26 states before enhancement),while ReachableStatesComputation was computing reachable states (72 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 237 locations, 1 error locations. TIMEOUT Result, 244.2s OverallTime, 9 OverallIterations, 3 TraceHistogramMax, 42.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1209 SDtfs, 4167 SDslu, 777 SDs, 0 SdLazy, 5585 SolverSat, 1193 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 21.4s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 587 GetRequests, 502 SyntacticMatches, 19 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 84.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2246occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 111.8s AbstIntTime, 2 AbstIntIterations, 1 AbstIntStrong, 0.9951261510818301 AbsIntWeakeningRatio, 0.1736842105263158 AbsIntAvgWeakeningVarsNumRemoved, 390.32105263157894 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 8 MinimizatonAttempts, 40 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 1520 NumberOfCodeBlocks, 1520 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 1671 ConstructedInterpolants, 0 QuantifiedInterpolants, 1447591 SizeOfPredicates, 2 NumberOfNonLiveVariables, 419 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 11 InterpolantComputations, 9 PerfectInterpolantSequences, 312/338 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown