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_label13_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 11:01:14,738 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 11:01:14,740 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 11:01:14,754 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 11:01:14,754 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 11:01:14,755 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 11:01:14,756 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 11:01:14,758 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 11:01:14,760 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 11:01:14,761 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 11:01:14,762 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 11:01:14,762 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 11:01:14,763 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 11:01:14,764 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 11:01:14,765 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 11:01:14,766 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 11:01:14,767 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 11:01:14,768 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 11:01:14,771 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 11:01:14,772 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 11:01:14,773 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 11:01:14,775 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 11:01:14,777 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-07-24 11:01:14,784 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 11:01:14,784 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 11:01:14,786 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 11:01:14,786 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 11:01:14,787 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 11:01:14,805 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 11:01:14,805 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 11:01:14,806 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 11:01:14,806 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 11:01:14,806 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 11:01:14,806 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 11:01:14,807 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 11:01:14,807 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 11:01:14,807 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 11:01:14,807 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 11:01:14,807 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 11:01:14,808 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 11:01:14,808 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 11:01:14,809 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 11:01:14,809 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 11:01:14,809 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 11:01:14,809 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 11:01:14,809 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 11:01:14,810 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 11:01:14,810 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 11:01:14,810 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 11:01:14,810 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 11:01:14,810 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 11:01:14,810 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 11:01:14,811 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 11:01:14,811 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 11:01:14,811 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 11:01:14,812 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 11:01:14,812 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 11:01:14,812 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 11:01:14,812 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 11:01:14,813 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 11:01:14,813 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 11:01:14,868 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 11:01:14,885 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 11:01:14,891 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 11:01:14,892 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 11:01:14,893 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 11:01:14,893 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label13_false-unreach-call.c [2018-07-24 11:01:15,224 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73f8b2478/ff7d4c4d20bf4944aa454f8bda57aa0c/FLAGba17028c6 [2018-07-24 11:01:15,603 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 11:01:15,604 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label13_false-unreach-call.c [2018-07-24 11:01:15,633 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73f8b2478/ff7d4c4d20bf4944aa454f8bda57aa0c/FLAGba17028c6 [2018-07-24 11:01:15,654 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73f8b2478/ff7d4c4d20bf4944aa454f8bda57aa0c [2018-07-24 11:01:15,665 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 11:01:15,667 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 11:01:15,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 11:01:15,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 11:01:15,676 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 11:01:15,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 11:01:15" (1/1) ... [2018-07-24 11:01:15,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77928ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:15, skipping insertion in model container [2018-07-24 11:01:15,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 11:01:15" (1/1) ... [2018-07-24 11:01:15,920 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 11:01:16,427 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 11:01:16,446 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 11:01:16,713 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 11:01:16,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:16 WrapperNode [2018-07-24 11:01:16,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 11:01:16,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 11:01:16,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 11:01:16,791 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 11:01:16,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:16" (1/1) ... [2018-07-24 11:01:16,845 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:16" (1/1) ... [2018-07-24 11:01:16,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 11:01:16,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 11:01:16,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 11:01:16,948 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 11:01:16,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:16" (1/1) ... [2018-07-24 11:01:16,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:16" (1/1) ... [2018-07-24 11:01:16,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:16" (1/1) ... [2018-07-24 11:01:16,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:16" (1/1) ... [2018-07-24 11:01:17,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:16" (1/1) ... [2018-07-24 11:01:17,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:16" (1/1) ... [2018-07-24 11:01:17,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:16" (1/1) ... [2018-07-24 11:01:17,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 11:01:17,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 11:01:17,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 11:01:17,397 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 11:01:17,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:16" (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 11:01:17,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 11:01:17,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 11:01:17,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 11:01:17,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 11:01:17,462 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 11:01:17,462 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 11:01:17,462 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 11:01:17,462 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 11:01:22,808 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 11:01:22,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 11:01:22 BoogieIcfgContainer [2018-07-24 11:01:22,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 11:01:22,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 11:01:22,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 11:01:22,825 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 11:01:22,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 11:01:15" (1/3) ... [2018-07-24 11:01:22,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d81514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 11:01:22, skipping insertion in model container [2018-07-24 11:01:22,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:16" (2/3) ... [2018-07-24 11:01:22,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d81514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 11:01:22, skipping insertion in model container [2018-07-24 11:01:22,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 11:01:22" (3/3) ... [2018-07-24 11:01:22,832 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label13_false-unreach-call.c [2018-07-24 11:01:22,846 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 11:01:22,860 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 11:01:22,935 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 11:01:22,936 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 11:01:22,936 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 11:01:22,936 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 11:01:22,937 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 11:01:22,937 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 11:01:22,937 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 11:01:22,937 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 11:01:22,937 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 11:01:22,982 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-07-24 11:01:23,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-07-24 11:01:23,015 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:01:23,016 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:01:23,017 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 11:01:23,023 INFO L82 PathProgramCache]: Analyzing trace with hash 868373361, now seen corresponding path program 1 times [2018-07-24 11:01:23,027 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:01:23,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:23,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:23,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:23,088 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:01:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:23,972 WARN L169 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 11:01:24,146 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 11:01:24,149 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:01:24,150 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 11:01:24,150 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:01:24,156 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 11:01:24,173 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 11:01:24,173 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 11:01:24,176 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-07-24 11:01:26,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:01:26,702 INFO L93 Difference]: Finished difference Result 838 states and 1479 transitions. [2018-07-24 11:01:26,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 11:01:26,704 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 162 [2018-07-24 11:01:26,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:01:26,727 INFO L225 Difference]: With dead ends: 838 [2018-07-24 11:01:26,727 INFO L226 Difference]: Without dead ends: 524 [2018-07-24 11:01:26,735 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 11:01:26,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2018-07-24 11:01:26,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 522. [2018-07-24 11:01:26,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2018-07-24 11:01:26,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 890 transitions. [2018-07-24 11:01:26,833 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 890 transitions. Word has length 162 [2018-07-24 11:01:26,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:01:26,834 INFO L471 AbstractCegarLoop]: Abstraction has 522 states and 890 transitions. [2018-07-24 11:01:26,835 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 11:01:26,835 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 890 transitions. [2018-07-24 11:01:26,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-07-24 11:01:26,842 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:01:26,842 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:01:26,842 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 11:01:26,843 INFO L82 PathProgramCache]: Analyzing trace with hash -535712744, now seen corresponding path program 1 times [2018-07-24 11:01:26,843 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:01:26,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:26,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:26,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:26,845 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:01:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:27,435 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 11:01:27,436 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:01:27,436 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 11:01:27,436 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:01:27,439 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 11:01:27,439 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 11:01:27,440 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 11:01:27,441 INFO L87 Difference]: Start difference. First operand 522 states and 890 transitions. Second operand 6 states. [2018-07-24 11:01:31,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:01:31,679 INFO L93 Difference]: Finished difference Result 1615 states and 2867 transitions. [2018-07-24 11:01:31,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 11:01:31,682 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 172 [2018-07-24 11:01:31,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:01:31,697 INFO L225 Difference]: With dead ends: 1615 [2018-07-24 11:01:31,698 INFO L226 Difference]: Without dead ends: 1099 [2018-07-24 11:01:31,707 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 11:01:31,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2018-07-24 11:01:31,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 1040. [2018-07-24 11:01:31,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1040 states. [2018-07-24 11:01:31,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1692 transitions. [2018-07-24 11:01:31,778 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1692 transitions. Word has length 172 [2018-07-24 11:01:31,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:01:31,779 INFO L471 AbstractCegarLoop]: Abstraction has 1040 states and 1692 transitions. [2018-07-24 11:01:31,779 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 11:01:31,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1692 transitions. [2018-07-24 11:01:31,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-07-24 11:01:31,784 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:01:31,784 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:01:31,784 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 11:01:31,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1046915059, now seen corresponding path program 1 times [2018-07-24 11:01:31,785 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:01:31,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:31,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:31,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:31,786 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:01:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:32,087 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 11:01:32,087 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:01:32,087 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 11:01:32,088 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:01:32,088 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 11:01:32,088 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 11:01:32,089 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 11:01:32,089 INFO L87 Difference]: Start difference. First operand 1040 states and 1692 transitions. Second operand 3 states. [2018-07-24 11:01:35,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:01:35,207 INFO L93 Difference]: Finished difference Result 3008 states and 5037 transitions. [2018-07-24 11:01:35,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 11:01:35,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 175 [2018-07-24 11:01:35,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:01:35,228 INFO L225 Difference]: With dead ends: 3008 [2018-07-24 11:01:35,228 INFO L226 Difference]: Without dead ends: 1974 [2018-07-24 11:01:35,234 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 11:01:35,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1974 states. [2018-07-24 11:01:35,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1974 to 1945. [2018-07-24 11:01:35,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1945 states. [2018-07-24 11:01:35,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 3141 transitions. [2018-07-24 11:01:35,320 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 3141 transitions. Word has length 175 [2018-07-24 11:01:35,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:01:35,321 INFO L471 AbstractCegarLoop]: Abstraction has 1945 states and 3141 transitions. [2018-07-24 11:01:35,321 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 11:01:35,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 3141 transitions. [2018-07-24 11:01:35,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-07-24 11:01:35,328 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:01:35,328 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:01:35,329 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 11:01:35,329 INFO L82 PathProgramCache]: Analyzing trace with hash 640783783, now seen corresponding path program 1 times [2018-07-24 11:01:35,329 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:01:35,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:35,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:35,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:35,331 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:01:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:35,542 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 11:01:35,543 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:01:35,543 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 11:01:35,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:35,553 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:01:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:35,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:01:36,338 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 11:01:36,338 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:01:36,602 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 11:01:37,279 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 11:01:37,316 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 11:01:37,317 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2018-07-24 11:01:37,318 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:01:37,319 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 11:01:37,319 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 11:01:37,320 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-07-24 11:01:37,323 INFO L87 Difference]: Start difference. First operand 1945 states and 3141 transitions. Second operand 5 states. [2018-07-24 11:01:39,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:01:39,027 INFO L93 Difference]: Finished difference Result 5894 states and 9838 transitions. [2018-07-24 11:01:39,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 11:01:39,028 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 194 [2018-07-24 11:01:39,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:01:39,055 INFO L225 Difference]: With dead ends: 5894 [2018-07-24 11:01:39,056 INFO L226 Difference]: Without dead ends: 3955 [2018-07-24 11:01:39,063 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 380 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-07-24 11:01:39,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3955 states. [2018-07-24 11:01:39,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3955 to 3910. [2018-07-24 11:01:39,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3910 states. [2018-07-24 11:01:39,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3910 states to 3910 states and 6459 transitions. [2018-07-24 11:01:39,189 INFO L78 Accepts]: Start accepts. Automaton has 3910 states and 6459 transitions. Word has length 194 [2018-07-24 11:01:39,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:01:39,189 INFO L471 AbstractCegarLoop]: Abstraction has 3910 states and 6459 transitions. [2018-07-24 11:01:39,190 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 11:01:39,190 INFO L276 IsEmpty]: Start isEmpty. Operand 3910 states and 6459 transitions. [2018-07-24 11:01:39,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-07-24 11:01:39,201 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:01:39,201 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:01:39,201 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 11:01:39,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1695933696, now seen corresponding path program 1 times [2018-07-24 11:01:39,202 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:01:39,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:39,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:39,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:39,203 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:01:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:39,520 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 11:01:39,521 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:01:39,521 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 11:01:39,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:39,534 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:01:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:39,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:01:39,859 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 11:01:39,859 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:01:39,981 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 11:01:40,013 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:01:40,013 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 11:01:40,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:40,031 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:01:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:40,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:01:40,751 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 11:01:40,752 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:01:40,969 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 11:01:40,973 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:01:40,973 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-07-24 11:01:40,974 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:01:40,975 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 11:01:40,975 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 11:01:40,976 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-07-24 11:01:40,976 INFO L87 Difference]: Start difference. First operand 3910 states and 6459 transitions. Second operand 9 states. [2018-07-24 11:01:44,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:01:44,533 INFO L93 Difference]: Finished difference Result 11356 states and 19490 transitions. [2018-07-24 11:01:44,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-24 11:01:44,533 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 195 [2018-07-24 11:01:44,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:01:44,580 INFO L225 Difference]: With dead ends: 11356 [2018-07-24 11:01:44,580 INFO L226 Difference]: Without dead ends: 7452 [2018-07-24 11:01:44,598 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 796 GetRequests, 773 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2018-07-24 11:01:44,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7452 states. [2018-07-24 11:01:44,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7452 to 5651. [2018-07-24 11:01:44,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5651 states. [2018-07-24 11:01:44,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5651 states to 5651 states and 9091 transitions. [2018-07-24 11:01:44,800 INFO L78 Accepts]: Start accepts. Automaton has 5651 states and 9091 transitions. Word has length 195 [2018-07-24 11:01:44,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:01:44,800 INFO L471 AbstractCegarLoop]: Abstraction has 5651 states and 9091 transitions. [2018-07-24 11:01:44,800 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 11:01:44,800 INFO L276 IsEmpty]: Start isEmpty. Operand 5651 states and 9091 transitions. [2018-07-24 11:01:44,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-07-24 11:01:44,820 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:01:44,821 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:01:44,821 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 11:01:44,821 INFO L82 PathProgramCache]: Analyzing trace with hash -676789849, now seen corresponding path program 1 times [2018-07-24 11:01:44,821 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:01:44,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:44,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:44,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:44,823 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:01:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:45,220 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-24 11:01:45,221 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:01:45,221 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 11:01:45,221 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:01:45,222 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 11:01:45,222 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 11:01:45,222 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 11:01:45,222 INFO L87 Difference]: Start difference. First operand 5651 states and 9091 transitions. Second operand 3 states. [2018-07-24 11:01:46,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:01:46,564 INFO L93 Difference]: Finished difference Result 9566 states and 15501 transitions. [2018-07-24 11:01:46,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 11:01:46,565 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 210 [2018-07-24 11:01:46,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:01:46,583 INFO L225 Difference]: With dead ends: 9566 [2018-07-24 11:01:46,583 INFO L226 Difference]: Without dead ends: 3921 [2018-07-24 11:01:46,600 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 11:01:46,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3921 states. [2018-07-24 11:01:46,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3921 to 3645. [2018-07-24 11:01:46,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3645 states. [2018-07-24 11:01:46,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 5468 transitions. [2018-07-24 11:01:46,699 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 5468 transitions. Word has length 210 [2018-07-24 11:01:46,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:01:46,700 INFO L471 AbstractCegarLoop]: Abstraction has 3645 states and 5468 transitions. [2018-07-24 11:01:46,700 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 11:01:46,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 5468 transitions. [2018-07-24 11:01:46,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-07-24 11:01:46,713 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:01:46,713 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:01:46,713 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 11:01:46,714 INFO L82 PathProgramCache]: Analyzing trace with hash -16145541, now seen corresponding path program 1 times [2018-07-24 11:01:46,714 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:01:46,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:46,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:46,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:46,715 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:01:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:46,995 WARN L169 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 11:01:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:01:47,114 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:01:47,114 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 11:01:47,114 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:01:47,115 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 11:01:47,115 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 11:01:47,115 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 11:01:47,116 INFO L87 Difference]: Start difference. First operand 3645 states and 5468 transitions. Second operand 6 states. [2018-07-24 11:01:49,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:01:49,270 INFO L93 Difference]: Finished difference Result 9172 states and 14395 transitions. [2018-07-24 11:01:49,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 11:01:49,271 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 225 [2018-07-24 11:01:49,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:01:49,298 INFO L225 Difference]: With dead ends: 9172 [2018-07-24 11:01:49,299 INFO L226 Difference]: Without dead ends: 5533 [2018-07-24 11:01:49,313 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 11:01:49,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5533 states. [2018-07-24 11:01:49,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5533 to 5388. [2018-07-24 11:01:49,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5388 states. [2018-07-24 11:01:49,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5388 states to 5388 states and 7135 transitions. [2018-07-24 11:01:49,495 INFO L78 Accepts]: Start accepts. Automaton has 5388 states and 7135 transitions. Word has length 225 [2018-07-24 11:01:49,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:01:49,496 INFO L471 AbstractCegarLoop]: Abstraction has 5388 states and 7135 transitions. [2018-07-24 11:01:49,496 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 11:01:49,496 INFO L276 IsEmpty]: Start isEmpty. Operand 5388 states and 7135 transitions. [2018-07-24 11:01:49,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-07-24 11:01:49,512 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:01:49,513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:01:49,513 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 11:01:49,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1801710245, now seen corresponding path program 1 times [2018-07-24 11:01:49,513 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:01:49,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:49,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:49,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:49,515 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:01:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:49,845 WARN L169 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-07-24 11:01:50,220 WARN L169 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-07-24 11:01:50,780 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 11:01:50,780 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:01:50,781 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-07-24 11:01:50,781 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:01:50,781 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-24 11:01:50,781 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-24 11:01:50,782 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-07-24 11:01:50,782 INFO L87 Difference]: Start difference. First operand 5388 states and 7135 transitions. Second operand 8 states. [2018-07-24 11:01:51,010 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 8 [2018-07-24 11:01:51,472 WARN L169 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-07-24 11:01:56,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:01:56,242 INFO L93 Difference]: Finished difference Result 23912 states and 33989 transitions. [2018-07-24 11:01:56,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-24 11:01:56,242 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 240 [2018-07-24 11:01:56,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:01:56,316 INFO L225 Difference]: With dead ends: 23912 [2018-07-24 11:01:56,316 INFO L226 Difference]: Without dead ends: 18530 [2018-07-24 11:01:56,348 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2018-07-24 11:01:56,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18530 states. [2018-07-24 11:01:56,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18530 to 17450. [2018-07-24 11:01:56,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17450 states. [2018-07-24 11:01:56,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17450 states to 17450 states and 23216 transitions. [2018-07-24 11:01:56,823 INFO L78 Accepts]: Start accepts. Automaton has 17450 states and 23216 transitions. Word has length 240 [2018-07-24 11:01:56,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:01:56,823 INFO L471 AbstractCegarLoop]: Abstraction has 17450 states and 23216 transitions. [2018-07-24 11:01:56,823 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-24 11:01:56,823 INFO L276 IsEmpty]: Start isEmpty. Operand 17450 states and 23216 transitions. [2018-07-24 11:01:56,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-07-24 11:01:56,866 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:01:56,866 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:01:56,866 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 11:01:56,867 INFO L82 PathProgramCache]: Analyzing trace with hash 13471699, now seen corresponding path program 1 times [2018-07-24 11:01:56,867 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:01:56,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:56,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:56,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:56,868 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:01:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:57,518 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 11:01:57,518 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:01:57,518 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 11:01:57,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:57,534 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:01:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:57,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:01:58,124 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 11:01:58,124 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:01:58,722 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 11:01:58,745 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:01:58,745 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 11:01:58,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:58,764 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:01:59,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:59,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:01:59,762 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 11:01:59,763 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:02:00,295 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 11:02:00,298 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:02:00,298 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 5, 5] total 12 [2018-07-24 11:02:00,298 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:02:00,299 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-24 11:02:00,299 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-24 11:02:00,300 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-07-24 11:02:00,300 INFO L87 Difference]: Start difference. First operand 17450 states and 23216 transitions. Second operand 10 states. [2018-07-24 11:02:05,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:02:05,996 INFO L93 Difference]: Finished difference Result 44282 states and 61656 transitions. [2018-07-24 11:02:05,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-24 11:02:05,998 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 255 [2018-07-24 11:02:05,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:02:06,118 INFO L225 Difference]: With dead ends: 44282 [2018-07-24 11:02:06,118 INFO L226 Difference]: Without dead ends: 26838 [2018-07-24 11:02:06,341 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1060 GetRequests, 1017 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=340, Invalid=1142, Unknown=0, NotChecked=0, Total=1482 [2018-07-24 11:02:06,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26838 states. [2018-07-24 11:02:06,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26838 to 26149. [2018-07-24 11:02:06,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26149 states. [2018-07-24 11:02:06,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26149 states to 26149 states and 33450 transitions. [2018-07-24 11:02:06,984 INFO L78 Accepts]: Start accepts. Automaton has 26149 states and 33450 transitions. Word has length 255 [2018-07-24 11:02:06,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:02:06,984 INFO L471 AbstractCegarLoop]: Abstraction has 26149 states and 33450 transitions. [2018-07-24 11:02:06,984 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-24 11:02:06,984 INFO L276 IsEmpty]: Start isEmpty. Operand 26149 states and 33450 transitions. [2018-07-24 11:02:07,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-07-24 11:02:07,037 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:02:07,037 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:02:07,037 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 11:02:07,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1130801002, now seen corresponding path program 1 times [2018-07-24 11:02:07,039 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:02:07,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:07,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:07,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:07,040 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:02:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:07,618 WARN L169 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-07-24 11:02:07,805 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 11:02:07,806 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:02:07,806 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 11:02:07,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:07,813 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:02:08,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:08,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:02:08,706 WARN L169 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 11:02:08,864 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 11:02:08,864 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:02:09,077 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 11:02:09,099 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:02:09,099 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 11:02:09,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:09,115 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:02:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:09,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:02:09,829 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 11:02:09,829 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:02:10,095 WARN L169 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 40 [2018-07-24 11:02:10,429 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 93 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:10,432 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:02:10,433 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6, 8, 8] total 20 [2018-07-24 11:02:10,433 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:02:10,434 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-24 11:02:10,434 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-24 11:02:10,435 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2018-07-24 11:02:10,435 INFO L87 Difference]: Start difference. First operand 26149 states and 33450 transitions. Second operand 11 states. [2018-07-24 11:02:15,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:02:15,140 INFO L93 Difference]: Finished difference Result 55542 states and 75017 transitions. [2018-07-24 11:02:15,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 11:02:15,140 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 262 [2018-07-24 11:02:15,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:02:15,263 INFO L225 Difference]: With dead ends: 55542 [2018-07-24 11:02:15,264 INFO L226 Difference]: Without dead ends: 29399 [2018-07-24 11:02:15,326 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1067 GetRequests, 1042 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2018-07-24 11:02:15,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29399 states. [2018-07-24 11:02:16,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29399 to 27976. [2018-07-24 11:02:16,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27976 states. [2018-07-24 11:02:16,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27976 states to 27976 states and 33977 transitions. [2018-07-24 11:02:16,138 INFO L78 Accepts]: Start accepts. Automaton has 27976 states and 33977 transitions. Word has length 262 [2018-07-24 11:02:16,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:02:16,139 INFO L471 AbstractCegarLoop]: Abstraction has 27976 states and 33977 transitions. [2018-07-24 11:02:16,139 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-24 11:02:16,139 INFO L276 IsEmpty]: Start isEmpty. Operand 27976 states and 33977 transitions. [2018-07-24 11:02:16,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-07-24 11:02:16,172 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:02:16,172 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:02:16,172 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 11:02:16,173 INFO L82 PathProgramCache]: Analyzing trace with hash 442595083, now seen corresponding path program 1 times [2018-07-24 11:02:16,173 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:02:16,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:16,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:16,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:16,174 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:02:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:16,728 WARN L169 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-07-24 11:02:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 107 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:17,537 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:02:17,537 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 11:02:17,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:17,545 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:02:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:17,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:02:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 11:02:17,845 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:02:18,273 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 11:02:18,295 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 11:02:18,296 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2018-07-24 11:02:18,296 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:02:18,296 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 11:02:18,297 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 11:02:18,297 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-07-24 11:02:18,297 INFO L87 Difference]: Start difference. First operand 27976 states and 33977 transitions. Second operand 3 states. [2018-07-24 11:02:19,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:02:19,984 INFO L93 Difference]: Finished difference Result 75031 states and 92139 transitions. [2018-07-24 11:02:19,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 11:02:19,985 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 274 [2018-07-24 11:02:19,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:02:20,110 INFO L225 Difference]: With dead ends: 75031 [2018-07-24 11:02:20,110 INFO L226 Difference]: Without dead ends: 47269 [2018-07-24 11:02:20,167 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 549 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-07-24 11:02:20,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47269 states. [2018-07-24 11:02:20,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47269 to 47259. [2018-07-24 11:02:20,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47259 states. [2018-07-24 11:02:21,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47259 states to 47259 states and 56312 transitions. [2018-07-24 11:02:21,004 INFO L78 Accepts]: Start accepts. Automaton has 47259 states and 56312 transitions. Word has length 274 [2018-07-24 11:02:21,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:02:21,004 INFO L471 AbstractCegarLoop]: Abstraction has 47259 states and 56312 transitions. [2018-07-24 11:02:21,005 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 11:02:21,005 INFO L276 IsEmpty]: Start isEmpty. Operand 47259 states and 56312 transitions. [2018-07-24 11:02:21,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2018-07-24 11:02:21,064 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:02:21,064 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:02:21,064 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 11:02:21,065 INFO L82 PathProgramCache]: Analyzing trace with hash -983989775, now seen corresponding path program 1 times [2018-07-24 11:02:21,065 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:02:21,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:21,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:21,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:21,066 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:02:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 190 proven. 8 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-07-24 11:02:21,500 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:02:21,500 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 11:02:21,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:21,515 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:02:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:21,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:02:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-07-24 11:02:22,199 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:02:22,833 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 178 proven. 75 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 11:02:22,855 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 11:02:22,856 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 11 [2018-07-24 11:02:22,856 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:02:22,856 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 11:02:22,857 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 11:02:22,857 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-07-24 11:02:22,857 INFO L87 Difference]: Start difference. First operand 47259 states and 56312 transitions. Second operand 6 states. [2018-07-24 11:02:25,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:02:25,572 INFO L93 Difference]: Finished difference Result 93027 states and 112285 transitions. [2018-07-24 11:02:25,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 11:02:25,572 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 353 [2018-07-24 11:02:25,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:02:25,731 INFO L225 Difference]: With dead ends: 93027 [2018-07-24 11:02:25,731 INFO L226 Difference]: Without dead ends: 48722 [2018-07-24 11:02:25,828 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 716 GetRequests, 698 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2018-07-24 11:02:25,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48722 states. [2018-07-24 11:02:26,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48722 to 47670. [2018-07-24 11:02:26,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47670 states. [2018-07-24 11:02:26,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47670 states to 47670 states and 56649 transitions. [2018-07-24 11:02:26,928 INFO L78 Accepts]: Start accepts. Automaton has 47670 states and 56649 transitions. Word has length 353 [2018-07-24 11:02:26,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:02:26,928 INFO L471 AbstractCegarLoop]: Abstraction has 47670 states and 56649 transitions. [2018-07-24 11:02:26,928 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 11:02:26,928 INFO L276 IsEmpty]: Start isEmpty. Operand 47670 states and 56649 transitions. [2018-07-24 11:02:26,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2018-07-24 11:02:26,988 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:02:26,988 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:02:26,988 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 11:02:26,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1586934274, now seen corresponding path program 1 times [2018-07-24 11:02:26,989 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:02:26,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:26,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:26,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:26,990 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:02:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 182 proven. 79 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 11:02:27,351 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:02:27,351 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 11:02:27,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:27,360 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:02:27,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:27,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:02:28,268 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-07-24 11:02:28,268 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:02:28,507 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 182 proven. 79 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 11:02:28,530 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 11:02:28,531 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 11:02:28,531 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:02:28,531 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 11:02:28,532 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 11:02:28,532 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-07-24 11:02:28,532 INFO L87 Difference]: Start difference. First operand 47670 states and 56649 transitions. Second operand 5 states. [2018-07-24 11:02:31,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:02:31,474 INFO L93 Difference]: Finished difference Result 122393 states and 146652 transitions. [2018-07-24 11:02:31,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 11:02:31,474 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 355 [2018-07-24 11:02:31,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:02:31,647 INFO L225 Difference]: With dead ends: 122393 [2018-07-24 11:02:31,648 INFO L226 Difference]: Without dead ends: 77679 [2018-07-24 11:02:31,719 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 705 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-07-24 11:02:31,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77679 states. [2018-07-24 11:02:32,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77679 to 75303. [2018-07-24 11:02:32,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75303 states. [2018-07-24 11:02:32,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75303 states to 75303 states and 89169 transitions. [2018-07-24 11:02:32,988 INFO L78 Accepts]: Start accepts. Automaton has 75303 states and 89169 transitions. Word has length 355 [2018-07-24 11:02:32,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:02:32,988 INFO L471 AbstractCegarLoop]: Abstraction has 75303 states and 89169 transitions. [2018-07-24 11:02:32,989 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 11:02:32,989 INFO L276 IsEmpty]: Start isEmpty. Operand 75303 states and 89169 transitions. [2018-07-24 11:02:33,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-07-24 11:02:33,065 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:02:33,065 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:02:33,065 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 11:02:33,066 INFO L82 PathProgramCache]: Analyzing trace with hash 2070570936, now seen corresponding path program 1 times [2018-07-24 11:02:33,066 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:02:33,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:33,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:33,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:33,067 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:02:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:33,484 WARN L169 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 11:02:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 196 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:34,299 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:02:34,299 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 11:02:34,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:34,307 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:02:34,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:34,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:02:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 292 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:34,770 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:02:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 292 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:35,026 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:02:35,026 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 13 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 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 11:02:35,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:35,043 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:02:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:35,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:02:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 292 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:35,949 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:02:36,109 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 292 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:36,112 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:02:36,112 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 15 [2018-07-24 11:02:36,112 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:02:36,113 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 11:02:36,114 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 11:02:36,114 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-07-24 11:02:36,114 INFO L87 Difference]: Start difference. First operand 75303 states and 89169 transitions. Second operand 13 states. [2018-07-24 11:02:45,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:02:45,166 INFO L93 Difference]: Finished difference Result 236210 states and 306552 transitions. [2018-07-24 11:02:45,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-24 11:02:45,167 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 363 [2018-07-24 11:02:45,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:02:45,803 INFO L225 Difference]: With dead ends: 236210 [2018-07-24 11:02:45,803 INFO L226 Difference]: Without dead ends: 161121 [2018-07-24 11:02:45,980 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1496 GetRequests, 1454 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=339, Invalid=993, Unknown=0, NotChecked=0, Total=1332 [2018-07-24 11:02:46,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161121 states. [2018-07-24 11:02:50,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161121 to 157047. [2018-07-24 11:02:50,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157047 states. [2018-07-24 11:02:51,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157047 states to 157047 states and 193151 transitions. [2018-07-24 11:02:51,204 INFO L78 Accepts]: Start accepts. Automaton has 157047 states and 193151 transitions. Word has length 363 [2018-07-24 11:02:51,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:02:51,205 INFO L471 AbstractCegarLoop]: Abstraction has 157047 states and 193151 transitions. [2018-07-24 11:02:51,205 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 11:02:51,205 INFO L276 IsEmpty]: Start isEmpty. Operand 157047 states and 193151 transitions. [2018-07-24 11:02:51,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2018-07-24 11:02:51,498 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:02:51,499 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:02:51,499 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 11:02:51,499 INFO L82 PathProgramCache]: Analyzing trace with hash 986468626, now seen corresponding path program 1 times [2018-07-24 11:02:51,499 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:02:51,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:51,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:51,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:51,501 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:02:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 276 proven. 144 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-07-24 11:02:51,966 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:02:51,966 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:02:51,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:51,974 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:02:52,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:52,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:02:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 278 proven. 2 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2018-07-24 11:02:52,451 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:02:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 276 proven. 144 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-07-24 11:02:53,519 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:02:53,519 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 15 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 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 11:02:53,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:53,539 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:02:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:54,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:02:54,475 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 278 proven. 2 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2018-07-24 11:02:54,475 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:02:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 276 proven. 144 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-07-24 11:02:54,635 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:02:54,635 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 11:02:54,635 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:02:54,637 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 11:02:54,637 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 11:02:54,637 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 11:02:54,637 INFO L87 Difference]: Start difference. First operand 157047 states and 193151 transitions. Second operand 9 states. [2018-07-24 11:03:03,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:03:03,507 INFO L93 Difference]: Finished difference Result 331833 states and 427453 transitions. [2018-07-24 11:03:03,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-24 11:03:03,508 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 427 [2018-07-24 11:03:03,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:03:04,193 INFO L225 Difference]: With dead ends: 331833 [2018-07-24 11:03:04,194 INFO L226 Difference]: Without dead ends: 177139 [2018-07-24 11:03:04,493 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1730 GetRequests, 1705 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2018-07-24 11:03:04,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177139 states. [2018-07-24 11:03:09,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177139 to 163443. [2018-07-24 11:03:09,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163443 states. [2018-07-24 11:03:10,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163443 states to 163443 states and 208950 transitions. [2018-07-24 11:03:10,002 INFO L78 Accepts]: Start accepts. Automaton has 163443 states and 208950 transitions. Word has length 427 [2018-07-24 11:03:10,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:03:10,002 INFO L471 AbstractCegarLoop]: Abstraction has 163443 states and 208950 transitions. [2018-07-24 11:03:10,002 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 11:03:10,002 INFO L276 IsEmpty]: Start isEmpty. Operand 163443 states and 208950 transitions. [2018-07-24 11:03:11,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2018-07-24 11:03:11,382 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:03:11,383 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:03:11,383 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 11:03:11,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1250854147, now seen corresponding path program 1 times [2018-07-24 11:03:11,383 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:03:11,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:03:11,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:11,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:03:11,384 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:03:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 331 proven. 67 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-07-24 11:03:12,120 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:03:12,120 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:03:12,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:12,135 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:03:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:12,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:03:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 393 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-07-24 11:03:12,722 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:03:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 331 proven. 67 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-07-24 11:03:12,899 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:03:12,899 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 17 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 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 11:03:12,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:12,916 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:03:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:13,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:03:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 393 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-07-24 11:03:13,804 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:03:13,971 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 331 proven. 67 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-07-24 11:03:13,976 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:03:13,976 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 8 [2018-07-24 11:03:13,976 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:03:13,977 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 11:03:13,977 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 11:03:13,978 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-07-24 11:03:13,978 INFO L87 Difference]: Start difference. First operand 163443 states and 208950 transitions. Second operand 7 states. [2018-07-24 11:03:32,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:03:32,204 INFO L93 Difference]: Finished difference Result 590514 states and 831664 transitions. [2018-07-24 11:03:32,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 11:03:32,205 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 431 [2018-07-24 11:03:32,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:03:35,229 INFO L225 Difference]: With dead ends: 590514 [2018-07-24 11:03:35,229 INFO L226 Difference]: Without dead ends: 429454 [2018-07-24 11:03:35,587 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1732 GetRequests, 1716 SyntacticMatches, 8 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-07-24 11:03:35,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429454 states. [2018-07-24 11:03:48,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429454 to 412345. [2018-07-24 11:03:48,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412345 states. [2018-07-24 11:03:51,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412345 states to 412345 states and 541884 transitions. [2018-07-24 11:03:51,843 INFO L78 Accepts]: Start accepts. Automaton has 412345 states and 541884 transitions. Word has length 431 [2018-07-24 11:03:51,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:03:51,844 INFO L471 AbstractCegarLoop]: Abstraction has 412345 states and 541884 transitions. [2018-07-24 11:03:51,844 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 11:03:51,844 INFO L276 IsEmpty]: Start isEmpty. Operand 412345 states and 541884 transitions. [2018-07-24 11:03:53,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2018-07-24 11:03:53,148 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:03:53,149 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:03:53,149 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 11:03:53,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1951933529, now seen corresponding path program 1 times [2018-07-24 11:03:53,149 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:03:53,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:03:53,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:53,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:03:53,151 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:03:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:53,668 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 333 proven. 67 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-07-24 11:03:53,669 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:03:53,669 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:03:53,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:53,677 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:03:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:54,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:03:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 397 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-07-24 11:03:54,176 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:03:54,684 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 333 proven. 67 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-07-24 11:03:54,705 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:03:54,705 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 19 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 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 11:03:54,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:54,720 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:03:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:55,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:03:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 397 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-07-24 11:03:56,630 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:03:56,821 WARN L169 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2018-07-24 11:03:57,287 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 333 proven. 67 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-07-24 11:03:57,291 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:03:57,291 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-07-24 11:03:57,292 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:03:57,292 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 11:03:57,293 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 11:03:57,293 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2018-07-24 11:03:57,293 INFO L87 Difference]: Start difference. First operand 412345 states and 541884 transitions. Second operand 9 states. [2018-07-24 11:04:36,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:04:36,889 INFO L93 Difference]: Finished difference Result 1035477 states and 1383506 transitions. [2018-07-24 11:04:36,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-24 11:04:36,889 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 433 [2018-07-24 11:04:36,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:04:39,853 INFO L225 Difference]: With dead ends: 1035477 [2018-07-24 11:04:39,854 INFO L226 Difference]: Without dead ends: 623803 [2018-07-24 11:04:40,915 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1796 GetRequests, 1752 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=333, Invalid=1737, Unknown=0, NotChecked=0, Total=2070 [2018-07-24 11:04:41,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623803 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown