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-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label01_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 14:12:00,910 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 14:12:00,912 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 14:12:00,927 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 14:12:00,927 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 14:12:00,929 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 14:12:00,931 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 14:12:00,934 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 14:12:00,936 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 14:12:00,937 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 14:12:00,940 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 14:12:00,940 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 14:12:00,942 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 14:12:00,943 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 14:12:00,950 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 14:12:00,951 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 14:12:00,952 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 14:12:00,957 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 14:12:00,961 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 14:12:00,963 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 14:12:00,966 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 14:12:00,968 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 14:12:00,976 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-27 14:12:00,987 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 14:12:00,987 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 14:12:00,988 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 14:12:00,989 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 14:12:00,989 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 14:12:01,017 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 14:12:01,017 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 14:12:01,018 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 14:12:01,019 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 14:12:01,020 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 14:12:01,020 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 14:12:01,020 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 14:12:01,020 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 14:12:01,020 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 14:12:01,020 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 14:12:01,021 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 14:12:01,021 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 14:12:01,022 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 14:12:01,023 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 14:12:01,023 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 14:12:01,023 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 14:12:01,023 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 14:12:01,024 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 14:12:01,025 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 14:12:01,025 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 14:12:01,025 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 14:12:01,025 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 14:12:01,026 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 14:12:01,026 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 14:12:01,026 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 14:12:01,026 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 14:12:01,026 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 14:12:01,027 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 14:12:01,028 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 14:12:01,028 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 14:12:01,028 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 14:12:01,028 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 14:12:01,028 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 14:12:01,029 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 14:12:01,081 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 14:12:01,096 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 14:12:01,100 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 14:12:01,102 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 14:12:01,102 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 14:12:01,103 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label01_true-unreach-call.c [2018-10-27 14:12:01,176 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/81eb21295/3369a422a408490c8b1f9373718cfa75/FLAGf17053c03 [2018-10-27 14:12:01,958 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 14:12:01,959 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label01_true-unreach-call.c [2018-10-27 14:12:02,004 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/81eb21295/3369a422a408490c8b1f9373718cfa75/FLAGf17053c03 [2018-10-27 14:12:02,027 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/81eb21295/3369a422a408490c8b1f9373718cfa75 [2018-10-27 14:12:02,043 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 14:12:02,046 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 14:12:02,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 14:12:02,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 14:12:02,054 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 14:12:02,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:12:02" (1/1) ... [2018-10-27 14:12:02,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40f3d0e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:12:02, skipping insertion in model container [2018-10-27 14:12:02,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:12:02" (1/1) ... [2018-10-27 14:12:02,073 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 14:12:02,275 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 14:12:03,810 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:12:03,815 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 14:12:04,539 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:12:04,581 INFO L193 MainTranslator]: Completed translation [2018-10-27 14:12:04,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:12:04 WrapperNode [2018-10-27 14:12:04,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 14:12:04,583 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 14:12:04,583 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 14:12:04,584 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 14:12:04,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:12:04" (1/1) ... [2018-10-27 14:12:04,681 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:12:04" (1/1) ... [2018-10-27 14:12:05,206 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 14:12:05,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 14:12:05,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 14:12:05,207 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 14:12:05,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:12:04" (1/1) ... [2018-10-27 14:12:05,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:12:04" (1/1) ... [2018-10-27 14:12:05,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:12:04" (1/1) ... [2018-10-27 14:12:05,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:12:04" (1/1) ... [2018-10-27 14:12:05,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:12:04" (1/1) ... [2018-10-27 14:12:05,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:12:04" (1/1) ... [2018-10-27 14:12:05,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:12:04" (1/1) ... [2018-10-27 14:12:05,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 14:12:05,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 14:12:05,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 14:12:05,565 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 14:12:05,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:12:04" (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 14:12:05,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 14:12:05,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 14:12:05,641 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-27 14:12:05,641 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-27 14:12:05,641 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-27 14:12:05,641 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-27 14:12:05,641 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 14:12:05,642 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 14:12:05,642 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 14:12:05,642 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 14:12:05,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 14:12:05,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 14:12:05,643 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 14:12:05,644 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 14:12:16,452 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 14:12:16,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:12:16 BoogieIcfgContainer [2018-10-27 14:12:16,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 14:12:16,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 14:12:16,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 14:12:16,457 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 14:12:16,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:12:02" (1/3) ... [2018-10-27 14:12:16,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3466a226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:12:16, skipping insertion in model container [2018-10-27 14:12:16,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:12:04" (2/3) ... [2018-10-27 14:12:16,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3466a226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:12:16, skipping insertion in model container [2018-10-27 14:12:16,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:12:16" (3/3) ... [2018-10-27 14:12:16,461 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label01_true-unreach-call.c [2018-10-27 14:12:16,470 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 14:12:16,480 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 14:12:16,495 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 14:12:16,543 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 14:12:16,543 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 14:12:16,543 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 14:12:16,543 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 14:12:16,543 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 14:12:16,543 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 14:12:16,544 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 14:12:16,544 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 14:12:16,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states. [2018-10-27 14:12:16,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-27 14:12:16,601 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:12:16,602 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] [2018-10-27 14:12:16,604 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:12:16,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:12:16,610 INFO L82 PathProgramCache]: Analyzing trace with hash 980545676, now seen corresponding path program 1 times [2018-10-27 14:12:16,613 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:12:16,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:12:16,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:12:16,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:12:16,669 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:12:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:12:17,106 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 14:12:17,264 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 14:12:17,268 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:12:17,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 14:12:17,269 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:12:17,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 14:12:17,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 14:12:17,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 14:12:17,292 INFO L87 Difference]: Start difference. First operand 1120 states. Second operand 3 states. [2018-10-27 14:12:26,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:12:26,057 INFO L93 Difference]: Finished difference Result 3097 states and 5707 transitions. [2018-10-27 14:12:26,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 14:12:26,059 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2018-10-27 14:12:26,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:12:26,094 INFO L225 Difference]: With dead ends: 3097 [2018-10-27 14:12:26,095 INFO L226 Difference]: Without dead ends: 1975 [2018-10-27 14:12:26,107 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 14:12:26,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2018-10-27 14:12:26,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1974. [2018-10-27 14:12:26,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1974 states. [2018-10-27 14:12:26,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 3284 transitions. [2018-10-27 14:12:26,260 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 3284 transitions. Word has length 56 [2018-10-27 14:12:26,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:12:26,261 INFO L481 AbstractCegarLoop]: Abstraction has 1974 states and 3284 transitions. [2018-10-27 14:12:26,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 14:12:26,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 3284 transitions. [2018-10-27 14:12:26,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-27 14:12:26,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:12:26,269 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:12:26,270 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:12:26,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:12:26,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1287580412, now seen corresponding path program 1 times [2018-10-27 14:12:26,270 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:12:26,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:12:26,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:12:26,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:12:26,272 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:12:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:12:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:12:26,541 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:12:26,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 14:12:26,541 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:12:26,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 14:12:26,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 14:12:26,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 14:12:26,544 INFO L87 Difference]: Start difference. First operand 1974 states and 3284 transitions. Second operand 5 states. [2018-10-27 14:12:47,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:12:47,143 INFO L93 Difference]: Finished difference Result 5736 states and 9691 transitions. [2018-10-27 14:12:47,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 14:12:47,144 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2018-10-27 14:12:47,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:12:47,168 INFO L225 Difference]: With dead ends: 5736 [2018-10-27 14:12:47,168 INFO L226 Difference]: Without dead ends: 3768 [2018-10-27 14:12:47,176 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 [2018-10-27 14:12:47,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2018-10-27 14:12:47,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 3686. [2018-10-27 14:12:47,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3686 states. [2018-10-27 14:12:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3686 states to 3686 states and 5660 transitions. [2018-10-27 14:12:47,285 INFO L78 Accepts]: Start accepts. Automaton has 3686 states and 5660 transitions. Word has length 132 [2018-10-27 14:12:47,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:12:47,286 INFO L481 AbstractCegarLoop]: Abstraction has 3686 states and 5660 transitions. [2018-10-27 14:12:47,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 14:12:47,286 INFO L276 IsEmpty]: Start isEmpty. Operand 3686 states and 5660 transitions. [2018-10-27 14:12:47,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-27 14:12:47,291 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:12:47,292 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:12:47,292 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:12:47,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:12:47,292 INFO L82 PathProgramCache]: Analyzing trace with hash 800617696, now seen corresponding path program 1 times [2018-10-27 14:12:47,293 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:12:47,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:12:47,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:12:47,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:12:47,294 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:12:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:12:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:12:47,487 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:12:47,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 14:12:47,488 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:12:47,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 14:12:47,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 14:12:47,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 14:12:47,489 INFO L87 Difference]: Start difference. First operand 3686 states and 5660 transitions. Second operand 5 states. [2018-10-27 14:13:19,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:13:19,016 INFO L93 Difference]: Finished difference Result 13666 states and 21762 transitions. [2018-10-27 14:13:19,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 14:13:19,017 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2018-10-27 14:13:19,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:13:19,076 INFO L225 Difference]: With dead ends: 13666 [2018-10-27 14:13:19,076 INFO L226 Difference]: Without dead ends: 9986 [2018-10-27 14:13:19,104 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 14:13:19,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9986 states. [2018-10-27 14:13:19,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9986 to 9796. [2018-10-27 14:13:19,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9796 states. [2018-10-27 14:13:19,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9796 states to 9796 states and 14502 transitions. [2018-10-27 14:13:19,381 INFO L78 Accepts]: Start accepts. Automaton has 9796 states and 14502 transitions. Word has length 146 [2018-10-27 14:13:19,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:13:19,381 INFO L481 AbstractCegarLoop]: Abstraction has 9796 states and 14502 transitions. [2018-10-27 14:13:19,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 14:13:19,382 INFO L276 IsEmpty]: Start isEmpty. Operand 9796 states and 14502 transitions. [2018-10-27 14:13:19,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-27 14:13:19,388 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:13:19,388 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:13:19,388 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:13:19,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:13:19,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2020564548, now seen corresponding path program 1 times [2018-10-27 14:13:19,389 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:13:19,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:13:19,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:13:19,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:13:19,390 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:13:19,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:13:19,739 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 14:13:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:13:20,118 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:13:20,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 14:13:20,119 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:13:20,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 14:13:20,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 14:13:20,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 14:13:20,120 INFO L87 Difference]: Start difference. First operand 9796 states and 14502 transitions. Second operand 6 states. [2018-10-27 14:13:33,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:13:33,932 INFO L93 Difference]: Finished difference Result 34190 states and 53781 transitions. [2018-10-27 14:13:33,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 14:13:33,933 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 164 [2018-10-27 14:13:33,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:13:34,047 INFO L225 Difference]: With dead ends: 34190 [2018-10-27 14:13:34,048 INFO L226 Difference]: Without dead ends: 24400 [2018-10-27 14:13:34,123 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 14:13:34,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24400 states. [2018-10-27 14:13:34,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24400 to 24170. [2018-10-27 14:13:34,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24170 states. [2018-10-27 14:13:34,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24170 states to 24170 states and 34070 transitions. [2018-10-27 14:13:34,747 INFO L78 Accepts]: Start accepts. Automaton has 24170 states and 34070 transitions. Word has length 164 [2018-10-27 14:13:34,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:13:34,748 INFO L481 AbstractCegarLoop]: Abstraction has 24170 states and 34070 transitions. [2018-10-27 14:13:34,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 14:13:34,748 INFO L276 IsEmpty]: Start isEmpty. Operand 24170 states and 34070 transitions. [2018-10-27 14:13:34,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-10-27 14:13:34,755 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:13:34,755 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:13:34,756 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:13:34,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:13:34,756 INFO L82 PathProgramCache]: Analyzing trace with hash -744065737, now seen corresponding path program 1 times [2018-10-27 14:13:34,756 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:13:34,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:13:34,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:13:34,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:13:34,758 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:13:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:13:35,065 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 14:13:35,466 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:13:35,467 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:13:35,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 14:13:35,467 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:13:35,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 14:13:35,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 14:13:35,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 14:13:35,469 INFO L87 Difference]: Start difference. First operand 24170 states and 34070 transitions. Second operand 6 states. [2018-10-27 14:13:47,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:13:47,674 INFO L93 Difference]: Finished difference Result 62346 states and 97882 transitions. [2018-10-27 14:13:47,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 14:13:47,678 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 175 [2018-10-27 14:13:47,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:13:47,858 INFO L225 Difference]: With dead ends: 62346 [2018-10-27 14:13:47,858 INFO L226 Difference]: Without dead ends: 38182 [2018-10-27 14:13:47,918 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 14:13:47,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38182 states. [2018-10-27 14:13:48,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38182 to 37983. [2018-10-27 14:13:48,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37983 states. [2018-10-27 14:13:48,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37983 states to 37983 states and 54450 transitions. [2018-10-27 14:13:48,864 INFO L78 Accepts]: Start accepts. Automaton has 37983 states and 54450 transitions. Word has length 175 [2018-10-27 14:13:48,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:13:48,864 INFO L481 AbstractCegarLoop]: Abstraction has 37983 states and 54450 transitions. [2018-10-27 14:13:48,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 14:13:48,865 INFO L276 IsEmpty]: Start isEmpty. Operand 37983 states and 54450 transitions. [2018-10-27 14:13:48,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-10-27 14:13:48,871 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:13:48,872 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:13:48,872 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:13:48,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:13:48,872 INFO L82 PathProgramCache]: Analyzing trace with hash 787887912, now seen corresponding path program 1 times [2018-10-27 14:13:48,873 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:13:48,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:13:48,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:13:48,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:13:48,874 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:13:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:13:49,202 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 14:13:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:13:49,594 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:13:49,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 14:13:49,595 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:13:49,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 14:13:49,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 14:13:49,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 14:13:49,596 INFO L87 Difference]: Start difference. First operand 37983 states and 54450 transitions. Second operand 6 states. [2018-10-27 14:14:02,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:14:02,026 INFO L93 Difference]: Finished difference Result 83942 states and 123861 transitions. [2018-10-27 14:14:02,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 14:14:02,036 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 203 [2018-10-27 14:14:02,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:14:02,201 INFO L225 Difference]: With dead ends: 83942 [2018-10-27 14:14:02,202 INFO L226 Difference]: Without dead ends: 45965 [2018-10-27 14:14:02,292 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 14:14:02,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45965 states. [2018-10-27 14:14:03,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45965 to 45863. [2018-10-27 14:14:03,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45863 states. [2018-10-27 14:14:03,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45863 states to 45863 states and 62674 transitions. [2018-10-27 14:14:03,161 INFO L78 Accepts]: Start accepts. Automaton has 45863 states and 62674 transitions. Word has length 203 [2018-10-27 14:14:03,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:14:03,161 INFO L481 AbstractCegarLoop]: Abstraction has 45863 states and 62674 transitions. [2018-10-27 14:14:03,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 14:14:03,162 INFO L276 IsEmpty]: Start isEmpty. Operand 45863 states and 62674 transitions. [2018-10-27 14:14:03,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-10-27 14:14:03,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:14:03,176 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, 2, 2, 2, 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] [2018-10-27 14:14:03,176 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:14:03,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:14:03,177 INFO L82 PathProgramCache]: Analyzing trace with hash 334178010, now seen corresponding path program 1 times [2018-10-27 14:14:03,177 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:14:03,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:14:03,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:14:03,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:14:03,178 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:14:03,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:14:03,696 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:14:03,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:14:03,696 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:14:03,698 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 254 with the following transitions: [2018-10-27 14:14:03,701 INFO L202 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2699], [2707], [2715], [2723], [2731], [2739], [2747], [2755], [2763], [2771], [2779], [2787], [2795], [2803], [2811], [2819], [2827], [2835], [2843], [2851], [2859], [2867], [2875], [2883], [2891], [2899], [2907], [2915], [2923], [2931], [2939], [2947], [2955], [2963], [2971], [2975], [2977], [2980], [2988], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3129], [3133], [3137], [3148], [3151], [3152], [3156], [3160], [3164], [3168], [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 14:14:03,777 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:14:03,777 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:14:04,676 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 14:14:04,678 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 14:14:04,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:14:04,713 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 14:14:05,657 INFO L227 lantSequenceWeakener]: Weakened 229 states. On average, predicates are now at 71.62% of their original sizes. [2018-10-27 14:14:05,658 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 14:14:06,259 INFO L415 sIntCurrentIteration]: We unified 252 AI predicates to 252 [2018-10-27 14:14:06,259 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 14:14:06,260 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 14:14:06,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2018-10-27 14:14:06,261 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:14:06,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 14:14:06,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 14:14:06,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-10-27 14:14:06,262 INFO L87 Difference]: Start difference. First operand 45863 states and 62674 transitions. Second operand 10 states. [2018-10-27 14:14:13,788 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown