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-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label32_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 05:21:00,766 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 05:21:00,768 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 05:21:00,780 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 05:21:00,780 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 05:21:00,781 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 05:21:00,782 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 05:21:00,784 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 05:21:00,786 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 05:21:00,787 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 05:21:00,788 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 05:21:00,788 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 05:21:00,789 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 05:21:00,790 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 05:21:00,791 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 05:21:00,792 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 05:21:00,793 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 05:21:00,795 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 05:21:00,797 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 05:21:00,799 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 05:21:00,800 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 05:21:00,801 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 05:21:00,803 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-27 05:21:00,812 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-27 05:21:00,835 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 05:21:00,835 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 05:21:00,836 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 05:21:00,836 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 05:21:00,836 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 05:21:00,836 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 05:21:00,836 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-27 05:21:00,838 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 05:21:00,838 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 05:21:00,838 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 05:21:00,838 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 05:21:00,838 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 05:21:00,839 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 05:21:00,839 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 05:21:00,840 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 05:21:00,840 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 05:21:00,840 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 05:21:00,840 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 05:21:00,840 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 05:21:00,841 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 05:21:00,841 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 05:21:00,841 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 05:21:00,841 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 05:21:00,841 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 05:21:00,842 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 05:21:00,843 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 05:21:00,844 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 05:21:00,844 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 05:21:00,844 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 05:21:00,844 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 05:21:00,845 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 05:21:00,845 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 05:21:00,845 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 05:21:00,845 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 05:21:00,846 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 05:21:00,846 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 05:21:00,901 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 05:21:00,917 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 05:21:00,921 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 05:21:00,923 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 05:21:00,924 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 05:21:00,924 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label32_false-unreach-call.c [2018-10-27 05:21:00,995 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/7f27b55c8/37e5884f30b64fde8a2f1766039a25f6/FLAG31ef21884 [2018-10-27 05:21:01,830 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 05:21:01,831 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label32_false-unreach-call.c [2018-10-27 05:21:01,864 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/7f27b55c8/37e5884f30b64fde8a2f1766039a25f6/FLAG31ef21884 [2018-10-27 05:21:01,881 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/7f27b55c8/37e5884f30b64fde8a2f1766039a25f6 [2018-10-27 05:21:01,893 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 05:21:01,894 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 05:21:01,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 05:21:01,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 05:21:01,900 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 05:21:01,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:21:01" (1/1) ... [2018-10-27 05:21:01,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8de4687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:01, skipping insertion in model container [2018-10-27 05:21:01,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:21:01" (1/1) ... [2018-10-27 05:21:01,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 05:21:02,079 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 05:21:03,790 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 05:21:03,797 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 05:21:04,687 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 05:21:04,726 INFO L193 MainTranslator]: Completed translation [2018-10-27 05:21:04,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:04 WrapperNode [2018-10-27 05:21:04,727 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 05:21:04,728 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 05:21:04,728 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 05:21:04,729 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 05:21:04,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:04" (1/1) ... [2018-10-27 05:21:04,818 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:04" (1/1) ... [2018-10-27 05:21:05,312 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 05:21:05,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 05:21:05,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 05:21:05,313 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 05:21:05,323 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:04" (1/1) ... [2018-10-27 05:21:05,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:04" (1/1) ... [2018-10-27 05:21:05,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:04" (1/1) ... [2018-10-27 05:21:05,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:04" (1/1) ... [2018-10-27 05:21:05,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:04" (1/1) ... [2018-10-27 05:21:05,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:04" (1/1) ... [2018-10-27 05:21:05,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:04" (1/1) ... [2018-10-27 05:21:05,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 05:21:05,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 05:21:05,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 05:21:05,637 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 05:21:05,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:04" (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 [2018-10-27 05:21:05,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 05:21:05,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 05:21:05,712 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-27 05:21:05,712 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-27 05:21:05,712 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-27 05:21:05,712 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-27 05:21:05,713 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 05:21:05,713 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 05:21:05,713 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 05:21:05,713 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 05:21:05,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 05:21:05,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 05:21:05,714 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 05:21:05,715 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 05:21:16,516 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 05:21:16,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:21:16 BoogieIcfgContainer [2018-10-27 05:21:16,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 05:21:16,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 05:21:16,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 05:21:16,521 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 05:21:16,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:21:01" (1/3) ... [2018-10-27 05:21:16,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5791cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:21:16, skipping insertion in model container [2018-10-27 05:21:16,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:04" (2/3) ... [2018-10-27 05:21:16,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5791cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:21:16, skipping insertion in model container [2018-10-27 05:21:16,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:21:16" (3/3) ... [2018-10-27 05:21:16,525 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label32_false-unreach-call.c [2018-10-27 05:21:16,535 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 05:21:16,545 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 05:21:16,562 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 05:21:16,618 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 05:21:16,618 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 05:21:16,618 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 05:21:16,618 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 05:21:16,619 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 05:21:16,619 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 05:21:16,619 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 05:21:16,619 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 05:21:16,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states. [2018-10-27 05:21:16,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-27 05:21:16,677 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:21:16,678 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:21:16,681 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:21:16,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:21:16,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1656413677, now seen corresponding path program 1 times [2018-10-27 05:21:16,691 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:21:16,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:21:16,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:21:16,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:21:16,750 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:21:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:21:17,099 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 05:21:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:21:17,209 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:21:17,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 05:21:17,210 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:21:17,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 05:21:17,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 05:21:17,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 05:21:17,234 INFO L87 Difference]: Start difference. First operand 1120 states. Second operand 3 states. [2018-10-27 05:21:26,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:21:26,641 INFO L93 Difference]: Finished difference Result 3093 states and 5715 transitions. [2018-10-27 05:21:26,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 05:21:26,642 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2018-10-27 05:21:26,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:21:26,682 INFO L225 Difference]: With dead ends: 3093 [2018-10-27 05:21:26,682 INFO L226 Difference]: Without dead ends: 1971 [2018-10-27 05:21:26,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 05:21:26,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2018-10-27 05:21:26,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1957. [2018-10-27 05:21:26,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1957 states. [2018-10-27 05:21:26,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 3535 transitions. [2018-10-27 05:21:26,867 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 3535 transitions. Word has length 15 [2018-10-27 05:21:26,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:21:26,867 INFO L481 AbstractCegarLoop]: Abstraction has 1957 states and 3535 transitions. [2018-10-27 05:21:26,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 05:21:26,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 3535 transitions. [2018-10-27 05:21:26,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-27 05:21:26,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:21:26,874 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-27 05:21:26,874 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:21:26,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:21:26,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1180844236, now seen corresponding path program 1 times [2018-10-27 05:21:26,875 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:21:26,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:21:26,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:21:26,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:21:26,876 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:21:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:21:27,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:21:27,603 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:21:27,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 05:21:27,604 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:21:27,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 05:21:27,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 05:21:27,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 05:21:27,607 INFO L87 Difference]: Start difference. First operand 1957 states and 3535 transitions. Second operand 6 states. [2018-10-27 05:21:41,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:21:41,023 INFO L93 Difference]: Finished difference Result 5627 states and 10356 transitions. [2018-10-27 05:21:41,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 05:21:41,026 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2018-10-27 05:21:41,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:21:41,054 INFO L225 Difference]: With dead ends: 5627 [2018-10-27 05:21:41,054 INFO L226 Difference]: Without dead ends: 3676 [2018-10-27 05:21:41,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 05:21:41,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3676 states. [2018-10-27 05:21:41,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3676 to 3643. [2018-10-27 05:21:41,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3643 states. [2018-10-27 05:21:41,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3643 states to 3643 states and 5987 transitions. [2018-10-27 05:21:41,181 INFO L78 Accepts]: Start accepts. Automaton has 3643 states and 5987 transitions. Word has length 98 [2018-10-27 05:21:41,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:21:41,182 INFO L481 AbstractCegarLoop]: Abstraction has 3643 states and 5987 transitions. [2018-10-27 05:21:41,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 05:21:41,182 INFO L276 IsEmpty]: Start isEmpty. Operand 3643 states and 5987 transitions. [2018-10-27 05:21:41,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-27 05:21:41,190 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:21:41,190 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-27 05:21:41,190 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:21:41,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:21:41,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1396028292, now seen corresponding path program 1 times [2018-10-27 05:21:41,191 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:21:41,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:21:41,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:21:41,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:21:41,194 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:21:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:21:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:21:41,490 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:21:41,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 05:21:41,490 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:21:41,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 05:21:41,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 05:21:41,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 05:21:41,493 INFO L87 Difference]: Start difference. First operand 3643 states and 5987 transitions. Second operand 5 states. [2018-10-27 05:21:58,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:21:58,818 INFO L93 Difference]: Finished difference Result 10957 states and 18516 transitions. [2018-10-27 05:21:58,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 05:21:58,822 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 114 [2018-10-27 05:21:58,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:21:58,866 INFO L225 Difference]: With dead ends: 10957 [2018-10-27 05:21:58,867 INFO L226 Difference]: Without dead ends: 7320 [2018-10-27 05:21:58,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 05:21:58,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7320 states. [2018-10-27 05:21:59,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7320 to 7131. [2018-10-27 05:21:59,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7131 states. [2018-10-27 05:21:59,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7131 states to 7131 states and 10923 transitions. [2018-10-27 05:21:59,082 INFO L78 Accepts]: Start accepts. Automaton has 7131 states and 10923 transitions. Word has length 114 [2018-10-27 05:21:59,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:21:59,083 INFO L481 AbstractCegarLoop]: Abstraction has 7131 states and 10923 transitions. [2018-10-27 05:21:59,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 05:21:59,083 INFO L276 IsEmpty]: Start isEmpty. Operand 7131 states and 10923 transitions. [2018-10-27 05:21:59,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-27 05:21:59,088 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:21:59,088 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:21:59,089 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:21:59,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:21:59,089 INFO L82 PathProgramCache]: Analyzing trace with hash -696567544, now seen corresponding path program 1 times [2018-10-27 05:21:59,089 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:21:59,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:21:59,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:21:59,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:21:59,091 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:21:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:21:59,378 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 05:21:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:21:59,795 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:21:59,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 05:21:59,796 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:21:59,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 05:21:59,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 05:21:59,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 05:21:59,799 INFO L87 Difference]: Start difference. First operand 7131 states and 10923 transitions. Second operand 6 states. [2018-10-27 05:22:11,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:22:11,606 INFO L93 Difference]: Finished difference Result 19766 states and 31245 transitions. [2018-10-27 05:22:11,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 05:22:11,616 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 151 [2018-10-27 05:22:11,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:22:11,677 INFO L225 Difference]: With dead ends: 19766 [2018-10-27 05:22:11,677 INFO L226 Difference]: Without dead ends: 12641 [2018-10-27 05:22:11,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 05:22:11,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12641 states. [2018-10-27 05:22:11,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12641 to 12439. [2018-10-27 05:22:11,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12439 states. [2018-10-27 05:22:12,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12439 states to 12439 states and 18019 transitions. [2018-10-27 05:22:12,026 INFO L78 Accepts]: Start accepts. Automaton has 12439 states and 18019 transitions. Word has length 151 [2018-10-27 05:22:12,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:22:12,027 INFO L481 AbstractCegarLoop]: Abstraction has 12439 states and 18019 transitions. [2018-10-27 05:22:12,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 05:22:12,027 INFO L276 IsEmpty]: Start isEmpty. Operand 12439 states and 18019 transitions. [2018-10-27 05:22:12,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-27 05:22:12,034 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:22:12,035 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:22:12,035 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:22:12,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:22:12,035 INFO L82 PathProgramCache]: Analyzing trace with hash 220658057, now seen corresponding path program 1 times [2018-10-27 05:22:12,036 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:22:12,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:22:12,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:22:12,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:22:12,037 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:22:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:22:12,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:22:12,384 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:22:12,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 05:22:12,385 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:22:12,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 05:22:12,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 05:22:12,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-27 05:22:12,386 INFO L87 Difference]: Start difference. First operand 12439 states and 18019 transitions. Second operand 6 states. [2018-10-27 05:22:28,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:22:28,840 INFO L93 Difference]: Finished difference Result 42949 states and 69054 transitions. [2018-10-27 05:22:28,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-27 05:22:28,843 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 173 [2018-10-27 05:22:28,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:22:28,991 INFO L225 Difference]: With dead ends: 42949 [2018-10-27 05:22:28,991 INFO L226 Difference]: Without dead ends: 30516 [2018-10-27 05:22:29,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-27 05:22:29,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30516 states. [2018-10-27 05:22:29,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30516 to 30278. [2018-10-27 05:22:29,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30278 states. [2018-10-27 05:22:29,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30278 states to 30278 states and 43651 transitions. [2018-10-27 05:22:29,900 INFO L78 Accepts]: Start accepts. Automaton has 30278 states and 43651 transitions. Word has length 173 [2018-10-27 05:22:29,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:22:29,900 INFO L481 AbstractCegarLoop]: Abstraction has 30278 states and 43651 transitions. [2018-10-27 05:22:29,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 05:22:29,901 INFO L276 IsEmpty]: Start isEmpty. Operand 30278 states and 43651 transitions. [2018-10-27 05:22:30,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-27 05:22:30,149 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:22:30,150 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:22:30,150 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:22:30,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:22:30,151 INFO L82 PathProgramCache]: Analyzing trace with hash -356666551, now seen corresponding path program 1 times [2018-10-27 05:22:30,151 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:22:30,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:22:30,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:22:30,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:22:30,153 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:22:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:22:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:22:30,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:22:30,717 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:22:30,718 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 220 with the following transitions: [2018-10-27 05:22:30,723 INFO L202 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2647], [2649], [2652], [2660], [2668], [2676], [2684], [2692], [2700], [2708], [2716], [2724], [2732], [2740], [2748], [2756], [2764], [2772], [2780], [2788], [2796], [2804], [2812], [2820], [2828], [2836], [2844], [2852], [2860], [2868], [2876], [2884], [2892], [2900], [2908], [2916], [2924], [2932], [2940], [2948], [2956], [2964], [2972], [2980], [2988], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3129], [3133], [3137], [3148], [3152], [3156], [3160], [3164], [3168], [3171], [3176], [3178], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3246], [3250], [3254], [3258], [3262], [3266], [3270], [3274], [3278], [3282], [3286], [3290], [3294], [3305], [3309], [3313], [3317], [3321], [3325], [3329], [3333], [3344], [3355], [3358], [3361], [3365], [4238], [4242], [4246], [4252], [4256], [4258], [4269], [4270], [4271], [4273], [4274] [2018-10-27 05:22:30,810 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:22:30,810 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:22:31,361 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 05:22:31,363 INFO L272 AbstractInterpreter]: Visited 124 different actions 124 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-27 05:22:31,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:22:31,404 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 05:22:31,882 INFO L227 lantSequenceWeakener]: Weakened 206 states. On average, predicates are now at 70.65% of their original sizes. [2018-10-27 05:22:31,882 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 05:22:32,133 INFO L415 sIntCurrentIteration]: We unified 218 AI predicates to 218 [2018-10-27 05:22:32,134 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 05:22:32,134 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 05:22:32,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2018-10-27 05:22:32,135 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:22:32,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 05:22:32,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 05:22:32,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 05:22:32,136 INFO L87 Difference]: Start difference. First operand 30278 states and 43651 transitions. Second operand 6 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown