java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label45_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 11:02:22,658 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 11:02:22,660 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 11:02:22,679 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 11:02:22,679 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 11:02:22,680 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 11:02:22,682 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 11:02:22,684 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 11:02:22,685 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 11:02:22,686 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 11:02:22,687 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 11:02:22,687 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 11:02:22,688 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 11:02:22,689 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 11:02:22,691 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 11:02:22,691 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 11:02:22,692 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 11:02:22,694 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 11:02:22,696 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 11:02:22,698 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 11:02:22,699 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 11:02:22,700 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 11:02:22,703 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 11:02:22,703 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 11:02:22,703 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 11:02:22,704 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 11:02:22,705 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 11:02:22,706 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 11:02:22,707 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 11:02:22,708 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 11:02:22,708 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 11:02:22,709 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 11:02:22,709 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 11:02:22,710 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 11:02:22,711 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 11:02:22,711 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 11:02:22,712 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-07-24 11:02:22,728 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 11:02:22,729 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 11:02:22,732 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 11:02:22,732 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 11:02:22,732 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 11:02:22,732 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 11:02:22,733 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 11:02:22,733 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 11:02:22,733 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 11:02:22,733 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 11:02:22,733 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 11:02:22,734 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 11:02:22,735 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 11:02:22,736 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 11:02:22,736 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 11:02:22,736 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 11:02:22,736 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 11:02:22,736 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 11:02:22,737 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 11:02:22,737 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 11:02:22,737 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 11:02:22,737 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 11:02:22,738 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 11:02:22,738 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 11:02:22,738 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 11:02:22,738 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 11:02:22,738 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 11:02:22,739 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 11:02:22,739 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 11:02:22,739 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 11:02:22,739 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 11:02:22,741 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 11:02:22,741 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 11:02:22,784 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 11:02:22,803 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 11:02:22,808 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 11:02:22,810 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 11:02:22,811 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 11:02:22,811 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label45_false-unreach-call.c [2018-07-24 11:02:23,171 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7abbc85dd/fc0e7a5288954de4b69ce150582d72f0/FLAG26ff728b4 [2018-07-24 11:02:23,550 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 11:02:23,550 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label45_false-unreach-call.c [2018-07-24 11:02:23,577 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7abbc85dd/fc0e7a5288954de4b69ce150582d72f0/FLAG26ff728b4 [2018-07-24 11:02:23,599 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7abbc85dd/fc0e7a5288954de4b69ce150582d72f0 [2018-07-24 11:02:23,611 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 11:02:23,612 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 11:02:23,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 11:02:23,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 11:02:23,626 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 11:02:23,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 11:02:23" (1/1) ... [2018-07-24 11:02:23,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53c2495d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:02:23, skipping insertion in model container [2018-07-24 11:02:23,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 11:02:23" (1/1) ... [2018-07-24 11:02:23,849 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 11:02:24,379 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 11:02:24,397 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 11:02:24,706 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 11:02:24,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:02:24 WrapperNode [2018-07-24 11:02:24,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 11:02:24,778 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 11:02:24,778 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 11:02:24,779 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 11:02:24,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:02:24" (1/1) ... [2018-07-24 11:02:24,826 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:02:24" (1/1) ... [2018-07-24 11:02:24,917 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 11:02:24,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 11:02:24,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 11:02:24,918 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 11:02:24,929 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:02:24" (1/1) ... [2018-07-24 11:02:24,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:02:24" (1/1) ... [2018-07-24 11:02:24,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:02:24" (1/1) ... [2018-07-24 11:02:24,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:02:24" (1/1) ... [2018-07-24 11:02:25,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:02:24" (1/1) ... [2018-07-24 11:02:25,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:02:24" (1/1) ... [2018-07-24 11:02:25,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:02:24" (1/1) ... [2018-07-24 11:02:25,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 11:02:25,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 11:02:25,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 11:02:25,321 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 11:02:25,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:02:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-24 11:02:25,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 11:02:25,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 11:02:25,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 11:02:25,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 11:02:25,401 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 11:02:25,401 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 11:02:25,401 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 11:02:25,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 11:02:30,801 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 11:02:30,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 11:02:30 BoogieIcfgContainer [2018-07-24 11:02:30,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 11:02:30,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 11:02:30,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 11:02:30,807 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 11:02:30,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 11:02:23" (1/3) ... [2018-07-24 11:02:30,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6effc989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 11:02:30, skipping insertion in model container [2018-07-24 11:02:30,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:02:24" (2/3) ... [2018-07-24 11:02:30,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6effc989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 11:02:30, skipping insertion in model container [2018-07-24 11:02:30,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 11:02:30" (3/3) ... [2018-07-24 11:02:30,818 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label45_false-unreach-call.c [2018-07-24 11:02:30,828 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 11:02:30,841 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 11:02:30,905 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 11:02:30,905 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 11:02:30,906 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 11:02:30,906 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 11:02:30,906 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 11:02:30,906 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 11:02:30,906 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 11:02:30,907 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 11:02:30,907 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 11:02:30,946 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-07-24 11:02:30,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-07-24 11:02:30,977 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:02:30,979 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:02:30,979 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:02:30,985 INFO L82 PathProgramCache]: Analyzing trace with hash -552516204, now seen corresponding path program 1 times [2018-07-24 11:02:30,988 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:02:31,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:31,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:31,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:31,046 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:02:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:32,104 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:02:32,105 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 11:02:32,105 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:02:32,112 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 11:02:32,129 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 11:02:32,129 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 11:02:32,133 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-07-24 11:02:35,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:02:35,320 INFO L93 Difference]: Finished difference Result 1054 states and 1900 transitions. [2018-07-24 11:02:35,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 11:02:35,323 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2018-07-24 11:02:35,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:02:35,349 INFO L225 Difference]: With dead ends: 1054 [2018-07-24 11:02:35,349 INFO L226 Difference]: Without dead ends: 736 [2018-07-24 11:02:35,358 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 11:02:35,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2018-07-24 11:02:35,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 526. [2018-07-24 11:02:35,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2018-07-24 11:02:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 886 transitions. [2018-07-24 11:02:35,458 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 886 transitions. Word has length 151 [2018-07-24 11:02:35,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:02:35,459 INFO L471 AbstractCegarLoop]: Abstraction has 526 states and 886 transitions. [2018-07-24 11:02:35,520 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 11:02:35,520 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 886 transitions. [2018-07-24 11:02:35,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-07-24 11:02:35,529 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:02:35,533 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:02:35,533 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:02:35,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1560096947, now seen corresponding path program 1 times [2018-07-24 11:02:35,538 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:02:35,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:35,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:35,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:35,539 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:02:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:35,854 WARN L169 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-07-24 11:02:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:36,309 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:02:36,310 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 11:02:36,310 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:02:36,312 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 11:02:36,313 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 11:02:36,313 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 11:02:36,313 INFO L87 Difference]: Start difference. First operand 526 states and 886 transitions. Second operand 6 states. [2018-07-24 11:02:39,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:02:39,713 INFO L93 Difference]: Finished difference Result 1631 states and 2867 transitions. [2018-07-24 11:02:39,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 11:02:39,714 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 161 [2018-07-24 11:02:39,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:02:39,729 INFO L225 Difference]: With dead ends: 1631 [2018-07-24 11:02:39,729 INFO L226 Difference]: Without dead ends: 1111 [2018-07-24 11:02:39,736 INFO L573 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 [2018-07-24 11:02:39,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2018-07-24 11:02:39,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 1063. [2018-07-24 11:02:39,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1063 states. [2018-07-24 11:02:39,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1717 transitions. [2018-07-24 11:02:39,815 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1717 transitions. Word has length 161 [2018-07-24 11:02:39,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:02:39,815 INFO L471 AbstractCegarLoop]: Abstraction has 1063 states and 1717 transitions. [2018-07-24 11:02:39,815 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 11:02:39,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1717 transitions. [2018-07-24 11:02:39,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-07-24 11:02:39,822 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:02:39,822 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:02:39,822 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:02:39,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1309734280, now seen corresponding path program 1 times [2018-07-24 11:02:39,823 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:02:39,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:39,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:39,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:39,825 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:02:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:40,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:40,142 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:02:40,142 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 11:02:40,142 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:02:40,143 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 11:02:40,146 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 11:02:40,147 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 11:02:40,147 INFO L87 Difference]: Start difference. First operand 1063 states and 1717 transitions. Second operand 3 states. [2018-07-24 11:02:43,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:02:43,265 INFO L93 Difference]: Finished difference Result 3070 states and 5109 transitions. [2018-07-24 11:02:43,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 11:02:43,267 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 164 [2018-07-24 11:02:43,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:02:43,283 INFO L225 Difference]: With dead ends: 3070 [2018-07-24 11:02:43,284 INFO L226 Difference]: Without dead ends: 2013 [2018-07-24 11:02:43,290 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 11:02:43,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2018-07-24 11:02:43,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 1999. [2018-07-24 11:02:43,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1999 states. [2018-07-24 11:02:43,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 3201 transitions. [2018-07-24 11:02:43,372 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 3201 transitions. Word has length 164 [2018-07-24 11:02:43,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:02:43,372 INFO L471 AbstractCegarLoop]: Abstraction has 1999 states and 3201 transitions. [2018-07-24 11:02:43,372 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 11:02:43,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 3201 transitions. [2018-07-24 11:02:43,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-07-24 11:02:43,383 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:02:43,383 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:02:43,384 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:02:43,384 INFO L82 PathProgramCache]: Analyzing trace with hash -738067747, now seen corresponding path program 1 times [2018-07-24 11:02:43,384 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:02:43,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:43,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:43,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:43,385 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:02:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:43,652 WARN L169 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-07-24 11:02:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:43,893 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:02:43,893 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-07-24 11:02:43,893 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:02:43,894 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 11:02:43,894 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 11:02:43,894 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-07-24 11:02:43,895 INFO L87 Difference]: Start difference. First operand 1999 states and 3201 transitions. Second operand 7 states. [2018-07-24 11:02:49,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:02:49,213 INFO L93 Difference]: Finished difference Result 6181 states and 11370 transitions. [2018-07-24 11:02:49,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 11:02:49,214 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 169 [2018-07-24 11:02:49,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:02:49,258 INFO L225 Difference]: With dead ends: 6181 [2018-07-24 11:02:49,258 INFO L226 Difference]: Without dead ends: 4188 [2018-07-24 11:02:49,270 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-07-24 11:02:49,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2018-07-24 11:02:49,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3998. [2018-07-24 11:02:49,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3998 states. [2018-07-24 11:02:49,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3998 states to 3998 states and 6576 transitions. [2018-07-24 11:02:49,434 INFO L78 Accepts]: Start accepts. Automaton has 3998 states and 6576 transitions. Word has length 169 [2018-07-24 11:02:49,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:02:49,435 INFO L471 AbstractCegarLoop]: Abstraction has 3998 states and 6576 transitions. [2018-07-24 11:02:49,435 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 11:02:49,435 INFO L276 IsEmpty]: Start isEmpty. Operand 3998 states and 6576 transitions. [2018-07-24 11:02:49,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-07-24 11:02:49,447 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:02:49,447 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:02:49,447 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:02:49,448 INFO L82 PathProgramCache]: Analyzing trace with hash -2007962226, now seen corresponding path program 1 times [2018-07-24 11:02:49,448 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:02:49,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:49,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:49,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:49,451 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:02:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:49,657 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:02:49,657 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 11:02:49,657 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:02:49,657 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 11:02:49,658 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 11:02:49,658 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 11:02:49,658 INFO L87 Difference]: Start difference. First operand 3998 states and 6576 transitions. Second operand 6 states. [2018-07-24 11:02:51,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:02:51,943 INFO L93 Difference]: Finished difference Result 12294 states and 21876 transitions. [2018-07-24 11:02:51,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 11:02:51,947 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 176 [2018-07-24 11:02:51,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:02:52,000 INFO L225 Difference]: With dead ends: 12294 [2018-07-24 11:02:52,000 INFO L226 Difference]: Without dead ends: 8302 [2018-07-24 11:02:52,027 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 11:02:52,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8302 states. [2018-07-24 11:02:52,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8302 to 8110. [2018-07-24 11:02:52,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8110 states. [2018-07-24 11:02:52,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8110 states to 8110 states and 13235 transitions. [2018-07-24 11:02:52,294 INFO L78 Accepts]: Start accepts. Automaton has 8110 states and 13235 transitions. Word has length 176 [2018-07-24 11:02:52,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:02:52,295 INFO L471 AbstractCegarLoop]: Abstraction has 8110 states and 13235 transitions. [2018-07-24 11:02:52,295 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 11:02:52,295 INFO L276 IsEmpty]: Start isEmpty. Operand 8110 states and 13235 transitions. [2018-07-24 11:02:52,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-07-24 11:02:52,313 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:02:52,313 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:02:52,314 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:02:52,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1529525986, now seen corresponding path program 1 times [2018-07-24 11:02:52,314 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:02:52,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:52,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:52,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:52,316 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:02:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:52,717 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:02:52,718 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:02:52,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:52,734 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:02:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:52,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:02:53,574 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-24 11:02:53,574 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:02:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-24 11:02:54,908 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 11:02:54,908 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2018-07-24 11:02:54,909 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:02:54,910 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 11:02:54,910 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 11:02:54,911 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-07-24 11:02:54,911 INFO L87 Difference]: Start difference. First operand 8110 states and 13235 transitions. Second operand 5 states. [2018-07-24 11:02:58,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:02:58,544 INFO L93 Difference]: Finished difference Result 24505 states and 42047 transitions. [2018-07-24 11:02:58,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 11:02:58,544 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 183 [2018-07-24 11:02:58,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:02:58,649 INFO L225 Difference]: With dead ends: 24505 [2018-07-24 11:02:58,649 INFO L226 Difference]: Without dead ends: 16401 [2018-07-24 11:02:58,686 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 358 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-07-24 11:02:58,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16401 states. [2018-07-24 11:02:59,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16401 to 16237. [2018-07-24 11:02:59,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16237 states. [2018-07-24 11:02:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16237 states to 16237 states and 26941 transitions. [2018-07-24 11:02:59,199 INFO L78 Accepts]: Start accepts. Automaton has 16237 states and 26941 transitions. Word has length 183 [2018-07-24 11:02:59,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:02:59,199 INFO L471 AbstractCegarLoop]: Abstraction has 16237 states and 26941 transitions. [2018-07-24 11:02:59,200 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 11:02:59,200 INFO L276 IsEmpty]: Start isEmpty. Operand 16237 states and 26941 transitions. [2018-07-24 11:02:59,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-07-24 11:02:59,240 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:02:59,241 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:02:59,241 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:02:59,241 INFO L82 PathProgramCache]: Analyzing trace with hash -244770971, now seen corresponding path program 1 times [2018-07-24 11:02:59,242 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:02:59,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:59,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:59,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:59,243 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:02:59,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:59,727 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:02:59,727 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:02:59,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:59,743 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:02:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:59,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:03:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:03:00,452 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:03:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:03:01,072 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:03:01,072 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 11:03:01,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:01,089 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:03:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:01,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:03:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:03:01,735 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:03:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:03:01,887 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:03:01,887 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-07-24 11:03:01,888 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:03:01,888 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 11:03:01,888 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 11:03:01,889 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-07-24 11:03:01,889 INFO L87 Difference]: Start difference. First operand 16237 states and 26941 transitions. Second operand 9 states. [2018-07-24 11:03:05,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:03:05,847 INFO L93 Difference]: Finished difference Result 44842 states and 75350 transitions. [2018-07-24 11:03:05,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-24 11:03:05,847 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 184 [2018-07-24 11:03:05,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:03:05,967 INFO L225 Difference]: With dead ends: 44842 [2018-07-24 11:03:05,968 INFO L226 Difference]: Without dead ends: 28611 [2018-07-24 11:03:06,015 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 752 GetRequests, 729 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2018-07-24 11:03:06,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28611 states. [2018-07-24 11:03:06,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28611 to 28409. [2018-07-24 11:03:06,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28409 states. [2018-07-24 11:03:06,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28409 states to 28409 states and 44467 transitions. [2018-07-24 11:03:06,720 INFO L78 Accepts]: Start accepts. Automaton has 28409 states and 44467 transitions. Word has length 184 [2018-07-24 11:03:06,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:03:06,720 INFO L471 AbstractCegarLoop]: Abstraction has 28409 states and 44467 transitions. [2018-07-24 11:03:06,721 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 11:03:06,721 INFO L276 IsEmpty]: Start isEmpty. Operand 28409 states and 44467 transitions. [2018-07-24 11:03:06,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-07-24 11:03:06,764 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:03:06,764 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:03:06,764 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:03:06,765 INFO L82 PathProgramCache]: Analyzing trace with hash -701251405, now seen corresponding path program 1 times [2018-07-24 11:03:06,765 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:03:06,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:03:06,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:06,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:03:06,766 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:03:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:07,064 WARN L169 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 11:03:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 36 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:03:07,233 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:03:07,233 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:03:07,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:07,241 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:03:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:07,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:03:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:03:07,612 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:03:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:03:07,776 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:03:07,776 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 11:03:07,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:07,808 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:03:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:08,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:03:08,355 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-07-24 11:03:08,356 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:03:08,521 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-07-24 11:03:08,523 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 3 imperfect interpolant sequences. [2018-07-24 11:03:08,524 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [10, 5, 5] total 22 [2018-07-24 11:03:08,524 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:03:08,524 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 11:03:08,524 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 11:03:08,525 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2018-07-24 11:03:08,525 INFO L87 Difference]: Start difference. First operand 28409 states and 44467 transitions. Second operand 5 states. [2018-07-24 11:03:10,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:03:10,194 INFO L93 Difference]: Finished difference Result 83935 states and 135946 transitions. [2018-07-24 11:03:10,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 11:03:10,195 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 192 [2018-07-24 11:03:10,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:03:10,459 INFO L225 Difference]: With dead ends: 83935 [2018-07-24 11:03:10,459 INFO L226 Difference]: Without dead ends: 55532 [2018-07-24 11:03:10,534 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 756 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2018-07-24 11:03:10,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55532 states. [2018-07-24 11:03:11,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55532 to 54941. [2018-07-24 11:03:11,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54941 states. [2018-07-24 11:03:11,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54941 states to 54941 states and 86052 transitions. [2018-07-24 11:03:11,947 INFO L78 Accepts]: Start accepts. Automaton has 54941 states and 86052 transitions. Word has length 192 [2018-07-24 11:03:11,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:03:11,948 INFO L471 AbstractCegarLoop]: Abstraction has 54941 states and 86052 transitions. [2018-07-24 11:03:11,948 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 11:03:11,948 INFO L276 IsEmpty]: Start isEmpty. Operand 54941 states and 86052 transitions. [2018-07-24 11:03:12,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-07-24 11:03:12,014 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:03:12,014 INFO L353 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:03:12,014 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:03:12,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1391045988, now seen corresponding path program 1 times [2018-07-24 11:03:12,015 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:03:12,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:03:12,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:12,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:03:12,016 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:03:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:03:12,338 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:03:12,338 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 11:03:12,338 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:03:12,338 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 11:03:12,339 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 11:03:12,339 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 11:03:12,339 INFO L87 Difference]: Start difference. First operand 54941 states and 86052 transitions. Second operand 3 states. [2018-07-24 11:03:15,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:03:15,136 INFO L93 Difference]: Finished difference Result 95723 states and 150713 transitions. [2018-07-24 11:03:15,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 11:03:15,136 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 197 [2018-07-24 11:03:15,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:03:15,298 INFO L225 Difference]: With dead ends: 95723 [2018-07-24 11:03:15,299 INFO L226 Difference]: Without dead ends: 40788 [2018-07-24 11:03:15,380 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 11:03:15,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40788 states. [2018-07-24 11:03:16,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40788 to 40591. [2018-07-24 11:03:16,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40591 states. [2018-07-24 11:03:16,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40591 states to 40591 states and 60364 transitions. [2018-07-24 11:03:16,228 INFO L78 Accepts]: Start accepts. Automaton has 40591 states and 60364 transitions. Word has length 197 [2018-07-24 11:03:16,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:03:16,229 INFO L471 AbstractCegarLoop]: Abstraction has 40591 states and 60364 transitions. [2018-07-24 11:03:16,229 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 11:03:16,229 INFO L276 IsEmpty]: Start isEmpty. Operand 40591 states and 60364 transitions. [2018-07-24 11:03:16,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-07-24 11:03:16,262 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:03:16,262 INFO L353 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:03:16,262 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:03:16,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1322644255, now seen corresponding path program 1 times [2018-07-24 11:03:16,263 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:03:16,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:03:16,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:16,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:03:16,264 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:03:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:03:16,535 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:03:16,535 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 11:03:16,535 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:03:16,536 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 11:03:16,536 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 11:03:16,536 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 11:03:16,536 INFO L87 Difference]: Start difference. First operand 40591 states and 60364 transitions. Second operand 6 states. [2018-07-24 11:03:18,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:03:18,773 INFO L93 Difference]: Finished difference Result 88423 states and 135456 transitions. [2018-07-24 11:03:18,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 11:03:18,774 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 211 [2018-07-24 11:03:18,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:03:18,928 INFO L225 Difference]: With dead ends: 88423 [2018-07-24 11:03:18,929 INFO L226 Difference]: Without dead ends: 47838 [2018-07-24 11:03:19,008 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 11:03:19,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47838 states. [2018-07-24 11:03:20,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47838 to 47566. [2018-07-24 11:03:20,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47566 states. [2018-07-24 11:03:20,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47566 states to 47566 states and 63302 transitions. [2018-07-24 11:03:20,639 INFO L78 Accepts]: Start accepts. Automaton has 47566 states and 63302 transitions. Word has length 211 [2018-07-24 11:03:20,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:03:20,639 INFO L471 AbstractCegarLoop]: Abstraction has 47566 states and 63302 transitions. [2018-07-24 11:03:20,639 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 11:03:20,639 INFO L276 IsEmpty]: Start isEmpty. Operand 47566 states and 63302 transitions. [2018-07-24 11:03:20,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-07-24 11:03:20,659 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:03:20,660 INFO L353 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, 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] [2018-07-24 11:03:20,660 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:03:20,660 INFO L82 PathProgramCache]: Analyzing trace with hash -713190934, now seen corresponding path program 1 times [2018-07-24 11:03:20,660 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:03:20,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:03:20,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:20,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:03:20,661 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:03:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:20,925 WARN L169 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-07-24 11:03:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:03:21,210 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:03:21,210 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-07-24 11:03:21,210 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:03:21,210 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-24 11:03:21,211 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-24 11:03:21,211 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-07-24 11:03:21,211 INFO L87 Difference]: Start difference. First operand 47566 states and 63302 transitions. Second operand 8 states. [2018-07-24 11:03:25,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:03:25,976 INFO L93 Difference]: Finished difference Result 149352 states and 202643 transitions. [2018-07-24 11:03:25,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-24 11:03:25,976 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 229 [2018-07-24 11:03:25,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:03:26,281 INFO L225 Difference]: With dead ends: 149352 [2018-07-24 11:03:26,281 INFO L226 Difference]: Without dead ends: 101792 [2018-07-24 11:03:26,377 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2018-07-24 11:03:26,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101792 states. [2018-07-24 11:03:28,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101792 to 100609. [2018-07-24 11:03:28,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100609 states. [2018-07-24 11:03:29,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100609 states to 100609 states and 132014 transitions. [2018-07-24 11:03:29,077 INFO L78 Accepts]: Start accepts. Automaton has 100609 states and 132014 transitions. Word has length 229 [2018-07-24 11:03:29,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:03:29,077 INFO L471 AbstractCegarLoop]: Abstraction has 100609 states and 132014 transitions. [2018-07-24 11:03:29,077 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-24 11:03:29,077 INFO L276 IsEmpty]: Start isEmpty. Operand 100609 states and 132014 transitions. [2018-07-24 11:03:29,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-07-24 11:03:29,108 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:03:29,108 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:03:29,108 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:03:29,108 INFO L82 PathProgramCache]: Analyzing trace with hash -227544462, now seen corresponding path program 1 times [2018-07-24 11:03:29,108 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:03:29,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:03:29,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:29,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:03:29,109 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:03:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:03:29,356 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:03:29,356 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:03:29,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:29,366 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:03:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:29,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:03:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:03:29,698 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:03:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:03:29,895 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:03:29,895 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 11:03:29,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:29,913 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:03:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:30,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:03:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:03:30,496 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:03:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:03:30,597 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:03:30,597 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 5, 5] total 12 [2018-07-24 11:03:30,597 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:03:30,598 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-24 11:03:30,598 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-24 11:03:30,598 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-07-24 11:03:30,599 INFO L87 Difference]: Start difference. First operand 100609 states and 132014 transitions. Second operand 10 states. [2018-07-24 11:03:38,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:03:38,211 INFO L93 Difference]: Finished difference Result 192577 states and 256769 transitions. [2018-07-24 11:03:38,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-24 11:03:38,211 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 244 [2018-07-24 11:03:38,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:03:38,442 INFO L225 Difference]: With dead ends: 192577 [2018-07-24 11:03:38,442 INFO L226 Difference]: Without dead ends: 91974 [2018-07-24 11:03:38,571 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 973 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=340, Invalid=1142, Unknown=0, NotChecked=0, Total=1482 [2018-07-24 11:03:38,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91974 states. [2018-07-24 11:03:41,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91974 to 91016. [2018-07-24 11:03:41,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91016 states. [2018-07-24 11:03:41,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91016 states to 91016 states and 117649 transitions. [2018-07-24 11:03:41,341 INFO L78 Accepts]: Start accepts. Automaton has 91016 states and 117649 transitions. Word has length 244 [2018-07-24 11:03:41,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:03:41,341 INFO L471 AbstractCegarLoop]: Abstraction has 91016 states and 117649 transitions. [2018-07-24 11:03:41,341 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-24 11:03:41,341 INFO L276 IsEmpty]: Start isEmpty. Operand 91016 states and 117649 transitions. [2018-07-24 11:03:41,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-07-24 11:03:41,374 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:03:41,374 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:03:41,374 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:03:41,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1631997125, now seen corresponding path program 1 times [2018-07-24 11:03:41,374 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:03:41,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:03:41,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:41,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:03:41,376 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:03:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:41,951 WARN L169 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-07-24 11:03:42,164 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-07-24 11:03:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:03:42,464 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:03:42,464 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:03:42,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:42,479 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:03:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:42,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:03:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 11:03:42,769 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:03:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 11:03:42,868 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 11:03:42,869 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-07-24 11:03:42,869 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:03:42,870 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 11:03:42,870 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 11:03:42,870 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-07-24 11:03:42,870 INFO L87 Difference]: Start difference. First operand 91016 states and 117649 transitions. Second operand 3 states. [2018-07-24 11:03:44,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:03:44,884 INFO L93 Difference]: Finished difference Result 180112 states and 233333 transitions. [2018-07-24 11:03:44,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 11:03:44,885 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 251 [2018-07-24 11:03:44,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:03:45,095 INFO L225 Difference]: With dead ends: 180112 [2018-07-24 11:03:45,095 INFO L226 Difference]: Without dead ends: 89102 [2018-07-24 11:03:45,220 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 500 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-07-24 11:03:45,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89102 states. [2018-07-24 11:03:47,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89102 to 84306. [2018-07-24 11:03:47,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84306 states. [2018-07-24 11:03:47,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84306 states to 84306 states and 106898 transitions. [2018-07-24 11:03:47,558 INFO L78 Accepts]: Start accepts. Automaton has 84306 states and 106898 transitions. Word has length 251 [2018-07-24 11:03:47,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:03:47,558 INFO L471 AbstractCegarLoop]: Abstraction has 84306 states and 106898 transitions. [2018-07-24 11:03:47,558 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 11:03:47,558 INFO L276 IsEmpty]: Start isEmpty. Operand 84306 states and 106898 transitions. [2018-07-24 11:03:47,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-07-24 11:03:47,601 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:03:47,602 INFO L353 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, 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] [2018-07-24 11:03:47,602 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:03:47,602 INFO L82 PathProgramCache]: Analyzing trace with hash 248323763, now seen corresponding path program 1 times [2018-07-24 11:03:47,602 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:03:47,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:03:47,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:47,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:03:47,603 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:03:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:47,886 WARN L169 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 11:03:47,960 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 130 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:03:47,960 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:03:47,960 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:03:47,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:47,969 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:03:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:48,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:03:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-07-24 11:03:48,335 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:03:48,589 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 130 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:03:48,612 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 11:03:48,612 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-07-24 11:03:48,612 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:03:48,612 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 11:03:48,613 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 11:03:48,613 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-07-24 11:03:48,613 INFO L87 Difference]: Start difference. First operand 84306 states and 106898 transitions. Second operand 6 states. [2018-07-24 11:03:51,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:03:51,497 INFO L93 Difference]: Finished difference Result 169321 states and 216731 transitions. [2018-07-24 11:03:51,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 11:03:51,498 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 289 [2018-07-24 11:03:51,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:03:52,358 INFO L225 Difference]: With dead ends: 169321 [2018-07-24 11:03:52,358 INFO L226 Difference]: Without dead ends: 85017 [2018-07-24 11:03:52,472 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 570 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2018-07-24 11:03:52,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85017 states. [2018-07-24 11:03:53,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85017 to 84326. [2018-07-24 11:03:53,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84326 states. [2018-07-24 11:03:53,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84326 states to 84326 states and 106906 transitions. [2018-07-24 11:03:53,991 INFO L78 Accepts]: Start accepts. Automaton has 84326 states and 106906 transitions. Word has length 289 [2018-07-24 11:03:53,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:03:53,991 INFO L471 AbstractCegarLoop]: Abstraction has 84326 states and 106906 transitions. [2018-07-24 11:03:53,991 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 11:03:53,991 INFO L276 IsEmpty]: Start isEmpty. Operand 84326 states and 106906 transitions. [2018-07-24 11:03:54,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-07-24 11:03:54,042 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:03:54,043 INFO L353 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, 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] [2018-07-24 11:03:54,043 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:03:54,043 INFO L82 PathProgramCache]: Analyzing trace with hash 130273984, now seen corresponding path program 1 times [2018-07-24 11:03:54,043 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:03:54,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:03:54,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:54,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:03:54,045 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:03:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:54,322 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 134 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:03:54,323 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:03:54,323 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:03:54,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:54,335 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:03:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:54,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:03:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-07-24 11:03:54,680 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:03:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 134 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:03:55,022 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 11:03:55,022 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 11:03:55,022 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:03:55,023 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 11:03:55,023 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 11:03:55,023 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-07-24 11:03:55,023 INFO L87 Difference]: Start difference. First operand 84326 states and 106906 transitions. Second operand 5 states. [2018-07-24 11:03:59,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:03:59,298 INFO L93 Difference]: Finished difference Result 226156 states and 287605 transitions. [2018-07-24 11:03:59,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 11:03:59,299 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 291 [2018-07-24 11:03:59,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:03:59,627 INFO L225 Difference]: With dead ends: 226156 [2018-07-24 11:03:59,627 INFO L226 Difference]: Without dead ends: 141836 [2018-07-24 11:03:59,756 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 577 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-07-24 11:03:59,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141836 states. [2018-07-24 11:04:02,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141836 to 133259. [2018-07-24 11:04:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133259 states. [2018-07-24 11:04:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133259 states to 133259 states and 168072 transitions. [2018-07-24 11:04:02,891 INFO L78 Accepts]: Start accepts. Automaton has 133259 states and 168072 transitions. Word has length 291 [2018-07-24 11:04:02,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:04:02,891 INFO L471 AbstractCegarLoop]: Abstraction has 133259 states and 168072 transitions. [2018-07-24 11:04:02,891 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 11:04:02,891 INFO L276 IsEmpty]: Start isEmpty. Operand 133259 states and 168072 transitions. [2018-07-24 11:04:02,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-07-24 11:04:02,955 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:04:02,956 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 11:04:02,956 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:04:02,956 INFO L82 PathProgramCache]: Analyzing trace with hash -835871871, now seen corresponding path program 1 times [2018-07-24 11:04:02,956 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:04:02,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:04:02,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:04:02,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:04:02,959 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:04:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:04:03,518 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 175 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:04:03,518 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:04:03,519 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:04:03,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:04:03,529 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:04:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:04:03,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:04:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 11:04:04,402 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:04:05,010 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 11:04:05,034 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 11:04:05,034 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2018-07-24 11:04:05,035 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:04:05,035 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 11:04:05,035 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 11:04:05,035 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-07-24 11:04:05,036 INFO L87 Difference]: Start difference. First operand 133259 states and 168072 transitions. Second operand 5 states. [2018-07-24 11:04:11,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:04:11,225 INFO L93 Difference]: Finished difference Result 350652 states and 457409 transitions. [2018-07-24 11:04:11,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 11:04:11,225 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 314 [2018-07-24 11:04:11,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:04:11,962 INFO L225 Difference]: With dead ends: 350652 [2018-07-24 11:04:11,962 INFO L226 Difference]: Without dead ends: 217399 [2018-07-24 11:04:12,166 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 624 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-07-24 11:04:12,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217399 states. [2018-07-24 11:04:16,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217399 to 210969. [2018-07-24 11:04:16,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210969 states. [2018-07-24 11:04:18,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210969 states to 210969 states and 267026 transitions. [2018-07-24 11:04:18,019 INFO L78 Accepts]: Start accepts. Automaton has 210969 states and 267026 transitions. Word has length 314 [2018-07-24 11:04:18,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:04:18,020 INFO L471 AbstractCegarLoop]: Abstraction has 210969 states and 267026 transitions. [2018-07-24 11:04:18,020 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 11:04:18,020 INFO L276 IsEmpty]: Start isEmpty. Operand 210969 states and 267026 transitions. [2018-07-24 11:04:18,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-07-24 11:04:18,121 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:04:18,121 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 11:04:18,121 INFO L414 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:04:18,122 INFO L82 PathProgramCache]: Analyzing trace with hash 274696789, now seen corresponding path program 1 times [2018-07-24 11:04:18,122 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:04:18,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:04:18,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:04:18,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:04:18,123 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:04:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:04:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 208 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:04:18,639 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:04:18,639 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:04:18,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:04:18,649 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:04:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:04:18,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:04:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 210 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 11:04:19,069 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:04:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 210 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 11:04:19,353 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:04:19,353 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 11:04:19,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:04:19,369 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:04:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:04:20,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:04:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 210 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 11:04:20,129 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:04:20,267 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 210 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 11:04:20,269 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:04:20,270 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5, 5, 5] total 18 [2018-07-24 11:04:20,270 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:04:20,270 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 11:04:20,271 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 11:04:20,271 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2018-07-24 11:04:20,271 INFO L87 Difference]: Start difference. First operand 210969 states and 267026 transitions. Second operand 14 states. [2018-07-24 11:04:52,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:04:52,680 INFO L93 Difference]: Finished difference Result 1504345 states and 2025381 transitions. [2018-07-24 11:04:52,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-24 11:04:52,681 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 333 [2018-07-24 11:04:52,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:04:58,571 INFO L225 Difference]: With dead ends: 1504345 [2018-07-24 11:04:58,571 INFO L226 Difference]: Without dead ends: 1293382 [2018-07-24 11:05:10,764 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1413 GetRequests, 1352 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=735, Invalid=2687, Unknown=0, NotChecked=0, Total=3422 [2018-07-24 11:05:11,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293382 states. [2018-07-24 11:05:46,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293382 to 1264396. [2018-07-24 11:05:46,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1264396 states.