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/Problem19_label38_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-25 02:13:25,659 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-25 02:13:25,661 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-25 02:13:25,678 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-25 02:13:25,678 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-25 02:13:25,680 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-25 02:13:25,682 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-25 02:13:25,685 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-25 02:13:25,688 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-25 02:13:25,689 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-25 02:13:25,690 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-25 02:13:25,690 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-25 02:13:25,692 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-25 02:13:25,693 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-25 02:13:25,701 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-25 02:13:25,701 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-25 02:13:25,704 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-25 02:13:25,709 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-25 02:13:25,711 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-25 02:13:25,712 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-25 02:13:25,716 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-25 02:13:25,717 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-25 02:13:25,719 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-25 02:13:25,728 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 [2018-10-25 02:13:25,743 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-25 02:13:25,743 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-25 02:13:25,744 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-25 02:13:25,744 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-25 02:13:25,744 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-25 02:13:25,745 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-25 02:13:25,745 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-25 02:13:25,745 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-25 02:13:25,745 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-25 02:13:25,745 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-25 02:13:25,745 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-25 02:13:25,746 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-25 02:13:25,746 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-25 02:13:25,746 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-25 02:13:25,747 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-25 02:13:25,747 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-25 02:13:25,747 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-25 02:13:25,747 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-25 02:13:25,747 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-25 02:13:25,748 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-25 02:13:25,748 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-25 02:13:25,748 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-25 02:13:25,748 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-25 02:13:25,748 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-25 02:13:25,749 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-25 02:13:25,749 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-25 02:13:25,749 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-25 02:13:25,749 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-25 02:13:25,750 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-25 02:13:25,750 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-25 02:13:25,750 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-25 02:13:25,750 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-25 02:13:25,750 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-25 02:13:25,751 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-25 02:13:25,751 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-25 02:13:25,751 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-25 02:13:25,817 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-25 02:13:25,833 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-25 02:13:25,838 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-25 02:13:25,839 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-25 02:13:25,840 INFO L276 PluginConnector]: CDTParser initialized [2018-10-25 02:13:25,841 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label38_true-unreach-call.c [2018-10-25 02:13:25,906 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/41e3d18ab/dab04faaa51c458ab7948b18161406dd/FLAG73273e443 [2018-10-25 02:13:26,834 INFO L298 CDTParser]: Found 1 translation units. [2018-10-25 02:13:26,835 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem19_label38_true-unreach-call.c [2018-10-25 02:13:26,878 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/41e3d18ab/dab04faaa51c458ab7948b18161406dd/FLAG73273e443 [2018-10-25 02:13:26,894 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/41e3d18ab/dab04faaa51c458ab7948b18161406dd [2018-10-25 02:13:26,908 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-25 02:13:26,911 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-25 02:13:26,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-25 02:13:26,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-25 02:13:26,919 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-25 02:13:26,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 02:13:26" (1/1) ... [2018-10-25 02:13:26,923 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 25.10 02:13:26, skipping insertion in model container [2018-10-25 02:13:26,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 02:13:26" (1/1) ... [2018-10-25 02:13:26,935 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-25 02:13:27,194 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-25 02:13:29,106 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-25 02:13:29,110 INFO L189 MainTranslator]: Completed pre-run [2018-10-25 02:13:30,157 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-25 02:13:30,215 INFO L193 MainTranslator]: Completed translation [2018-10-25 02:13:30,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:13:30 WrapperNode [2018-10-25 02:13:30,216 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-25 02:13:30,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-25 02:13:30,217 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-25 02:13:30,217 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-25 02:13:30,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:13:30" (1/1) ... [2018-10-25 02:13:30,346 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:13:30" (1/1) ... [2018-10-25 02:13:30,949 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-25 02:13:30,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-25 02:13:30,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-25 02:13:30,950 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-25 02:13:30,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:13:30" (1/1) ... [2018-10-25 02:13:30,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:13:30" (1/1) ... [2018-10-25 02:13:31,000 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:13:30" (1/1) ... [2018-10-25 02:13:31,001 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:13:30" (1/1) ... [2018-10-25 02:13:31,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:13:30" (1/1) ... [2018-10-25 02:13:31,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:13:30" (1/1) ... [2018-10-25 02:13:31,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:13:30" (1/1) ... [2018-10-25 02:13:31,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-25 02:13:31,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-25 02:13:31,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-25 02:13:31,542 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-25 02:13:31,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:13:30" (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 [2018-10-25 02:13:31,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-25 02:13:31,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-25 02:13:31,613 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2018-10-25 02:13:31,613 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2018-10-25 02:13:31,614 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2018-10-25 02:13:31,615 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2018-10-25 02:13:31,615 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-25 02:13:31,615 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-25 02:13:31,615 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-25 02:13:31,615 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-25 02:13:31,616 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-25 02:13:31,617 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-25 02:13:31,617 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-25 02:13:31,617 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-25 02:13:31,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-25 02:13:31,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-25 02:13:31,618 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-25 02:13:31,618 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-25 02:13:50,500 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-25 02:13:50,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 02:13:50 BoogieIcfgContainer [2018-10-25 02:13:50,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-25 02:13:50,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-25 02:13:50,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-25 02:13:50,506 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-25 02:13:50,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 02:13:26" (1/3) ... [2018-10-25 02:13:50,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d98ae1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 02:13:50, skipping insertion in model container [2018-10-25 02:13:50,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:13:30" (2/3) ... [2018-10-25 02:13:50,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d98ae1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 02:13:50, skipping insertion in model container [2018-10-25 02:13:50,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 02:13:50" (3/3) ... [2018-10-25 02:13:50,510 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label38_true-unreach-call.c [2018-10-25 02:13:50,520 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-25 02:13:50,531 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-25 02:13:50,549 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-25 02:13:50,604 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-25 02:13:50,604 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-25 02:13:50,604 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-25 02:13:50,604 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-25 02:13:50,604 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-25 02:13:50,605 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-25 02:13:50,605 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-25 02:13:50,605 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-25 02:13:50,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states. [2018-10-25 02:13:50,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-25 02:13:50,667 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:13:50,669 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] [2018-10-25 02:13:50,671 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:13:50,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:13:50,677 INFO L82 PathProgramCache]: Analyzing trace with hash -217079404, now seen corresponding path program 1 times [2018-10-25 02:13:50,680 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:13:50,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:13:50,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:13:50,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:13:50,733 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:13:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:13:51,240 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-25 02:13:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:13:51,373 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 02:13:51,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-25 02:13:51,374 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 02:13:51,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-25 02:13:51,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-25 02:13:51,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-25 02:13:51,399 INFO L87 Difference]: Start difference. First operand 1778 states. Second operand 3 states. [2018-10-25 02:14:06,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:14:06,958 INFO L93 Difference]: Finished difference Result 4999 states and 9420 transitions. [2018-10-25 02:14:06,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-25 02:14:06,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2018-10-25 02:14:06,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:14:07,019 INFO L225 Difference]: With dead ends: 4999 [2018-10-25 02:14:07,019 INFO L226 Difference]: Without dead ends: 3219 [2018-10-25 02:14:07,032 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 [2018-10-25 02:14:07,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2018-10-25 02:14:07,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 3215. [2018-10-25 02:14:07,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3215 states. [2018-10-25 02:14:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3215 states to 3215 states and 5845 transitions. [2018-10-25 02:14:07,240 INFO L78 Accepts]: Start accepts. Automaton has 3215 states and 5845 transitions. Word has length 66 [2018-10-25 02:14:07,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:14:07,241 INFO L481 AbstractCegarLoop]: Abstraction has 3215 states and 5845 transitions. [2018-10-25 02:14:07,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-25 02:14:07,242 INFO L276 IsEmpty]: Start isEmpty. Operand 3215 states and 5845 transitions. [2018-10-25 02:14:07,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-25 02:14:07,257 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:14:07,257 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 02:14:07,258 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:14:07,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:14:07,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1232037643, now seen corresponding path program 1 times [2018-10-25 02:14:07,258 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:14:07,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:14:07,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:14:07,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:14:07,261 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:14:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:14:07,610 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-25 02:14:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:14:07,958 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 02:14:07,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-25 02:14:07,958 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 02:14:07,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-25 02:14:07,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-25 02:14:07,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-25 02:14:07,962 INFO L87 Difference]: Start difference. First operand 3215 states and 5845 transitions. Second operand 6 states. [2018-10-25 02:14:36,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:14:36,184 INFO L93 Difference]: Finished difference Result 9331 states and 16910 transitions. [2018-10-25 02:14:36,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-25 02:14:36,187 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2018-10-25 02:14:36,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:14:36,223 INFO L225 Difference]: With dead ends: 9331 [2018-10-25 02:14:36,224 INFO L226 Difference]: Without dead ends: 6122 [2018-10-25 02:14:36,234 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 [2018-10-25 02:14:36,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6122 states. [2018-10-25 02:14:36,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6122 to 6084. [2018-10-25 02:14:36,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6084 states. [2018-10-25 02:14:36,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6084 states to 6084 states and 9616 transitions. [2018-10-25 02:14:36,408 INFO L78 Accepts]: Start accepts. Automaton has 6084 states and 9616 transitions. Word has length 138 [2018-10-25 02:14:36,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:14:36,408 INFO L481 AbstractCegarLoop]: Abstraction has 6084 states and 9616 transitions. [2018-10-25 02:14:36,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-25 02:14:36,408 INFO L276 IsEmpty]: Start isEmpty. Operand 6084 states and 9616 transitions. [2018-10-25 02:14:36,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-25 02:14:36,419 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:14:36,423 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 02:14:36,423 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:14:36,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:14:36,423 INFO L82 PathProgramCache]: Analyzing trace with hash -226672055, now seen corresponding path program 1 times [2018-10-25 02:14:36,424 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:14:36,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:14:36,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:14:36,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:14:36,426 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:14:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:14:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:14:36,902 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 02:14:36,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-25 02:14:36,903 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 02:14:36,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-25 02:14:36,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-25 02:14:36,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-25 02:14:36,905 INFO L87 Difference]: Start difference. First operand 6084 states and 9616 transitions. Second operand 6 states. [2018-10-25 02:15:25,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:15:25,421 INFO L93 Difference]: Finished difference Result 24241 states and 39700 transitions. [2018-10-25 02:15:25,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-25 02:15:25,422 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 156 [2018-10-25 02:15:25,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:15:25,523 INFO L225 Difference]: With dead ends: 24241 [2018-10-25 02:15:25,523 INFO L226 Difference]: Without dead ends: 18163 [2018-10-25 02:15:25,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-25 02:15:25,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18163 states. [2018-10-25 02:15:26,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18163 to 18089. [2018-10-25 02:15:26,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18089 states. [2018-10-25 02:15:26,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18089 states to 18089 states and 25630 transitions. [2018-10-25 02:15:26,089 INFO L78 Accepts]: Start accepts. Automaton has 18089 states and 25630 transitions. Word has length 156 [2018-10-25 02:15:26,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:15:26,090 INFO L481 AbstractCegarLoop]: Abstraction has 18089 states and 25630 transitions. [2018-10-25 02:15:26,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-25 02:15:26,090 INFO L276 IsEmpty]: Start isEmpty. Operand 18089 states and 25630 transitions. [2018-10-25 02:15:26,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-10-25 02:15:26,097 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:15:26,097 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-25 02:15:26,097 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:15:26,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:15:26,098 INFO L82 PathProgramCache]: Analyzing trace with hash -294519992, now seen corresponding path program 1 times [2018-10-25 02:15:26,098 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:15:26,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:15:26,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:15:26,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:15:26,100 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:15:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:15:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:15:26,512 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 02:15:26,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-25 02:15:26,512 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 02:15:26,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-25 02:15:26,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-25 02:15:26,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-25 02:15:26,514 INFO L87 Difference]: Start difference. First operand 18089 states and 25630 transitions. Second operand 5 states. [2018-10-25 02:15:53,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:15:53,824 INFO L93 Difference]: Finished difference Result 56344 states and 85025 transitions. [2018-10-25 02:15:53,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-25 02:15:53,824 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 201 [2018-10-25 02:15:53,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:15:54,001 INFO L225 Difference]: With dead ends: 56344 [2018-10-25 02:15:54,001 INFO L226 Difference]: Without dead ends: 38261 [2018-10-25 02:15:54,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-25 02:15:54,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38261 states. [2018-10-25 02:15:54,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38261 to 37187. [2018-10-25 02:15:54,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37187 states. [2018-10-25 02:15:55,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37187 states to 37187 states and 50443 transitions. [2018-10-25 02:15:55,009 INFO L78 Accepts]: Start accepts. Automaton has 37187 states and 50443 transitions. Word has length 201 [2018-10-25 02:15:55,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:15:55,010 INFO L481 AbstractCegarLoop]: Abstraction has 37187 states and 50443 transitions. [2018-10-25 02:15:55,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-25 02:15:55,011 INFO L276 IsEmpty]: Start isEmpty. Operand 37187 states and 50443 transitions. [2018-10-25 02:15:55,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-10-25 02:15:55,020 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:15:55,021 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 02:15:55,021 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:15:55,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:15:55,021 INFO L82 PathProgramCache]: Analyzing trace with hash 548752070, now seen corresponding path program 1 times [2018-10-25 02:15:55,021 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:15:55,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:15:55,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:15:55,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:15:55,023 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:15:55,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:15:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 118 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-25 02:15:55,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:15:55,542 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 02:15:55,543 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 222 with the following transitions: [2018-10-25 02:15:55,546 INFO L202 CegarAbsIntRunner]: [0], [1], [5227], [5234], [5242], [5250], [5258], [5266], [5274], [5282], [5290], [5298], [5306], [5314], [5322], [5330], [5338], [5346], [5354], [5362], [5370], [5378], [5386], [5394], [5402], [5410], [5418], [5426], [5434], [5442], [5450], [5458], [5466], [5474], [5482], [5490], [5498], [5506], [5514], [5522], [5530], [5538], [5546], [5554], [5562], [5570], [5578], [5586], [5594], [5602], [5610], [5618], [5626], [5634], [5642], [5650], [5654], [5656], [5659], [5667], [5675], [5683], [5691], [5699], [5707], [5715], [5727], [5731], [5742], [5745], [5746], [5750], [5754], [5758], [5762], [5766], [5770], [5774], [5778], [5781], [6802], [6806], [6810], [6816], [6820], [6822], [6837], [6838], [6839], [6841], [6842] [2018-10-25 02:15:55,612 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 02:15:55,612 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 02:15:56,459 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-25 02:15:56,462 INFO L272 AbstractInterpreter]: Visited 87 different actions 87 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-25 02:15:56,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:15:56,507 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-25 02:15:57,022 INFO L232 lantSequenceWeakener]: Weakened 212 states. On average, predicates are now at 75.91% of their original sizes. [2018-10-25 02:15:57,022 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-25 02:15:57,210 INFO L413 sIntCurrentIteration]: We have 220 unified AI predicates [2018-10-25 02:15:57,211 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-25 02:15:57,212 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-25 02:15:57,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2018-10-25 02:15:57,212 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 02:15:57,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-25 02:15:57,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-25 02:15:57,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-25 02:15:57,216 INFO L87 Difference]: Start difference. First operand 37187 states and 50443 transitions. Second operand 6 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown