java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label25_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 10:27:23,596 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 10:27:23,599 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 10:27:23,618 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 10:27:23,618 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 10:27:23,619 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 10:27:23,621 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 10:27:23,623 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 10:27:23,626 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 10:27:23,628 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 10:27:23,632 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 10:27:23,632 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 10:27:23,633 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 10:27:23,634 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 10:27:23,638 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 10:27:23,639 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 10:27:23,639 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 10:27:23,643 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 10:27:23,654 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 10:27:23,656 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 10:27:23,660 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 10:27:23,661 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 10:27:23,666 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 10:27:23,667 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 10:27:23,667 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 10:27:23,669 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 10:27:23,670 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 10:27:23,671 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 10:27:23,672 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 10:27:23,675 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 10:27:23,675 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 10:27:23,676 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 10:27:23,676 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 10:27:23,676 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 10:27:23,677 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 10:27:23,678 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 10:27:23,678 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 [2018-09-10 10:27:23,708 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 10:27:23,708 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 10:27:23,709 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 10:27:23,713 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 10:27:23,713 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 10:27:23,713 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 10:27:23,713 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 10:27:23,713 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 10:27:23,714 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 10:27:23,714 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 10:27:23,714 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 10:27:23,715 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 10:27:23,715 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 10:27:23,715 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 10:27:23,716 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 10:27:23,717 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 10:27:23,717 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 10:27:23,717 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 10:27:23,717 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 10:27:23,717 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 10:27:23,718 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 10:27:23,718 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 10:27:23,718 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 10:27:23,718 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 10:27:23,719 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 10:27:23,720 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 10:27:23,720 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 10:27:23,720 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 10:27:23,720 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 10:27:23,720 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 10:27:23,721 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 10:27:23,721 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 10:27:23,721 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 10:27:23,777 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 10:27:23,791 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 10:27:23,799 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 10:27:23,801 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 10:27:23,801 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 10:27:23,802 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label25_true-unreach-call.c [2018-09-10 10:27:24,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88064d47e/91f7ca4f0d6f4b5d9ad5a24d9a0d8ef5/FLAG7af4d0526 [2018-09-10 10:27:24,499 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 10:27:24,501 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label25_true-unreach-call.c [2018-09-10 10:27:24,526 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88064d47e/91f7ca4f0d6f4b5d9ad5a24d9a0d8ef5/FLAG7af4d0526 [2018-09-10 10:27:24,546 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88064d47e/91f7ca4f0d6f4b5d9ad5a24d9a0d8ef5 [2018-09-10 10:27:24,557 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 10:27:24,560 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 10:27:24,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 10:27:24,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 10:27:24,568 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 10:27:24,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:27:24" (1/1) ... [2018-09-10 10:27:24,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f1dc611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:24, skipping insertion in model container [2018-09-10 10:27:24,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:27:24" (1/1) ... [2018-09-10 10:27:24,869 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 10:27:25,386 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:27:25,404 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 10:27:25,689 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:27:25,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:25 WrapperNode [2018-09-10 10:27:25,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 10:27:25,759 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 10:27:25,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 10:27:25,760 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 10:27:25,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:25" (1/1) ... [2018-09-10 10:27:25,801 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:25" (1/1) ... [2018-09-10 10:27:25,891 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 10:27:25,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 10:27:25,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 10:27:25,892 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 10:27:26,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:25" (1/1) ... [2018-09-10 10:27:26,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:25" (1/1) ... [2018-09-10 10:27:26,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:25" (1/1) ... [2018-09-10 10:27:26,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:25" (1/1) ... [2018-09-10 10:27:26,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:25" (1/1) ... [2018-09-10 10:27:26,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:25" (1/1) ... [2018-09-10 10:27:26,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:25" (1/1) ... [2018-09-10 10:27:26,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 10:27:26,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 10:27:26,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 10:27:26,259 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 10:27:26,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:25" (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 [2018-09-10 10:27:26,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 10:27:26,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 10:27:26,336 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-09-10 10:27:26,336 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-09-10 10:27:26,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 10:27:26,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 10:27:26,336 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 10:27:26,337 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 10:27:31,625 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 10:27:31,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:27:31 BoogieIcfgContainer [2018-09-10 10:27:31,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 10:27:31,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 10:27:31,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 10:27:31,631 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 10:27:31,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 10:27:24" (1/3) ... [2018-09-10 10:27:31,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4996efd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:27:31, skipping insertion in model container [2018-09-10 10:27:31,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:25" (2/3) ... [2018-09-10 10:27:31,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4996efd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:27:31, skipping insertion in model container [2018-09-10 10:27:31,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:27:31" (3/3) ... [2018-09-10 10:27:31,636 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label25_true-unreach-call.c [2018-09-10 10:27:31,646 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 10:27:31,656 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 10:27:31,712 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 10:27:31,713 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 10:27:31,713 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 10:27:31,714 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 10:27:31,714 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 10:27:31,714 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 10:27:31,714 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 10:27:31,714 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 10:27:31,715 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 10:27:31,745 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-10 10:27:31,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-09-10 10:27:31,777 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:27:31,778 INFO L376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:27:31,779 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:27:31,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1441765812, now seen corresponding path program 1 times [2018-09-10 10:27:31,788 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:27:31,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:31,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:31,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:31,842 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:27:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:32,842 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:27:32,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 10:27:32,842 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:27:32,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:27:32,866 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:27:32,867 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:27:32,870 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-09-10 10:27:35,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:27:35,284 INFO L93 Difference]: Finished difference Result 844 states and 1489 transitions. [2018-09-10 10:27:35,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:27:35,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 187 [2018-09-10 10:27:35,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:27:35,309 INFO L225 Difference]: With dead ends: 844 [2018-09-10 10:27:35,309 INFO L226 Difference]: Without dead ends: 530 [2018-09-10 10:27:35,317 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:27:35,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2018-09-10 10:27:35,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 525. [2018-09-10 10:27:35,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2018-09-10 10:27:35,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 865 transitions. [2018-09-10 10:27:35,411 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 865 transitions. Word has length 187 [2018-09-10 10:27:35,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:27:35,413 INFO L480 AbstractCegarLoop]: Abstraction has 525 states and 865 transitions. [2018-09-10 10:27:35,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:27:35,413 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 865 transitions. [2018-09-10 10:27:35,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-10 10:27:35,422 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:27:35,422 INFO L376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:27:35,423 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:27:35,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1899321928, now seen corresponding path program 1 times [2018-09-10 10:27:35,424 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:27:35,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:35,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:35,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:35,425 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:27:35,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:35,932 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:27:35,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 10:27:35,932 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:27:35,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:27:35,934 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:27:35,935 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:27:35,935 INFO L87 Difference]: Start difference. First operand 525 states and 865 transitions. Second operand 3 states. [2018-09-10 10:27:38,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:27:38,655 INFO L93 Difference]: Finished difference Result 1473 states and 2495 transitions. [2018-09-10 10:27:38,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:27:38,655 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 200 [2018-09-10 10:27:38,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:27:38,664 INFO L225 Difference]: With dead ends: 1473 [2018-09-10 10:27:38,664 INFO L226 Difference]: Without dead ends: 954 [2018-09-10 10:27:38,675 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:27:38,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2018-09-10 10:27:38,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 953. [2018-09-10 10:27:38,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 953 states. [2018-09-10 10:27:38,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1483 transitions. [2018-09-10 10:27:38,737 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1483 transitions. Word has length 200 [2018-09-10 10:27:38,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:27:38,738 INFO L480 AbstractCegarLoop]: Abstraction has 953 states and 1483 transitions. [2018-09-10 10:27:38,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:27:38,739 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1483 transitions. [2018-09-10 10:27:38,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-10 10:27:38,744 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:27:38,745 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:27:38,745 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:27:38,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1892368660, now seen corresponding path program 1 times [2018-09-10 10:27:38,746 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:27:38,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:38,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:38,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:38,747 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:27:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:39,041 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:27:39,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 10:27:39,041 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:27:39,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:27:39,042 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:27:39,042 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:27:39,044 INFO L87 Difference]: Start difference. First operand 953 states and 1483 transitions. Second operand 3 states. [2018-09-10 10:27:41,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:27:41,674 INFO L93 Difference]: Finished difference Result 2751 states and 4392 transitions. [2018-09-10 10:27:41,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:27:41,676 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 202 [2018-09-10 10:27:41,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:27:41,691 INFO L225 Difference]: With dead ends: 2751 [2018-09-10 10:27:41,691 INFO L226 Difference]: Without dead ends: 1804 [2018-09-10 10:27:41,697 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:27:41,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2018-09-10 10:27:41,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1787. [2018-09-10 10:27:41,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1787 states. [2018-09-10 10:27:41,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 2763 transitions. [2018-09-10 10:27:41,763 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 2763 transitions. Word has length 202 [2018-09-10 10:27:41,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:27:41,764 INFO L480 AbstractCegarLoop]: Abstraction has 1787 states and 2763 transitions. [2018-09-10 10:27:41,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:27:41,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 2763 transitions. [2018-09-10 10:27:41,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-09-10 10:27:41,776 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:27:41,776 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:27:41,777 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:27:41,777 INFO L82 PathProgramCache]: Analyzing trace with hash -271483371, now seen corresponding path program 1 times [2018-09-10 10:27:41,777 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:27:41,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:41,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:41,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:41,780 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:27:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:42,156 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:27:42,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-10 10:27:42,157 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:27:42,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 10:27:42,157 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 10:27:42,158 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:27:42,158 INFO L87 Difference]: Start difference. First operand 1787 states and 2763 transitions. Second operand 7 states. [2018-09-10 10:27:45,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:27:45,305 INFO L93 Difference]: Finished difference Result 5547 states and 9902 transitions. [2018-09-10 10:27:45,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 10:27:45,306 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 205 [2018-09-10 10:27:45,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:27:45,351 INFO L225 Difference]: With dead ends: 5547 [2018-09-10 10:27:45,351 INFO L226 Difference]: Without dead ends: 3766 [2018-09-10 10:27:45,363 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-09-10 10:27:45,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3766 states. [2018-09-10 10:27:45,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3766 to 3581. [2018-09-10 10:27:45,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3581 states. [2018-09-10 10:27:45,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 5681 transitions. [2018-09-10 10:27:45,535 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 5681 transitions. Word has length 205 [2018-09-10 10:27:45,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:27:45,536 INFO L480 AbstractCegarLoop]: Abstraction has 3581 states and 5681 transitions. [2018-09-10 10:27:45,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 10:27:45,536 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 5681 transitions. [2018-09-10 10:27:45,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-10 10:27:45,551 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:27:45,551 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:27:45,552 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:27:45,552 INFO L82 PathProgramCache]: Analyzing trace with hash -791871735, now seen corresponding path program 1 times [2018-09-10 10:27:45,552 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:27:45,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:45,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:45,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:45,553 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:27:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:46,033 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:46,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:27:46,034 INFO L197 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 [2018-09-10 10:27:46,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:46,054 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:27:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:46,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:27:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:46,818 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:27:46,989 WARN L175 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-10 10:27:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:47,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:27:47,905 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 3 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 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:27:47,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:47,934 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:27:48,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:48,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:27:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:48,711 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:27:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:48,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:27:48,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-10 10:27:48,995 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:27:48,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:27:48,997 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:27:48,998 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-10 10:27:48,998 INFO L87 Difference]: Start difference. First operand 3581 states and 5681 transitions. Second operand 9 states. [2018-09-10 10:28:06,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:28:06,133 INFO L93 Difference]: Finished difference Result 34338 states and 72510 transitions. [2018-09-10 10:28:06,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-10 10:28:06,134 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 214 [2018-09-10 10:28:06,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:28:06,426 INFO L225 Difference]: With dead ends: 34338 [2018-09-10 10:28:06,426 INFO L226 Difference]: Without dead ends: 30763 [2018-09-10 10:28:06,566 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 871 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2018-09-10 10:28:06,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30763 states. [2018-09-10 10:28:07,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30763 to 29543. [2018-09-10 10:28:07,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29543 states. [2018-09-10 10:28:07,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29543 states to 29543 states and 45390 transitions. [2018-09-10 10:28:07,968 INFO L78 Accepts]: Start accepts. Automaton has 29543 states and 45390 transitions. Word has length 214 [2018-09-10 10:28:07,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:28:07,968 INFO L480 AbstractCegarLoop]: Abstraction has 29543 states and 45390 transitions. [2018-09-10 10:28:07,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:28:07,969 INFO L276 IsEmpty]: Start isEmpty. Operand 29543 states and 45390 transitions. [2018-09-10 10:28:08,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-10 10:28:08,063 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:28:08,064 INFO L376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:28:08,064 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:28:08,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1879895733, now seen corresponding path program 1 times [2018-09-10 10:28:08,065 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:28:08,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:08,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:08,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:08,066 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:28:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:28:08,641 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:28:08,641 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:28:08,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:08,655 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:28:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:08,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:28:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:28:09,292 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:28:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:28:09,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:28:09,723 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 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 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:28:09,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:09,743 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:28:10,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:10,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:28:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:28:10,644 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:28:10,801 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-10 10:28:10,967 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:28:10,970 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:28:10,971 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-10 10:28:10,971 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:28:10,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:28:10,972 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:28:10,972 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 10:28:10,972 INFO L87 Difference]: Start difference. First operand 29543 states and 45390 transitions. Second operand 9 states. [2018-09-10 10:28:15,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:28:15,394 INFO L93 Difference]: Finished difference Result 101447 states and 162765 transitions. [2018-09-10 10:28:15,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-10 10:28:15,395 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 220 [2018-09-10 10:28:15,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:28:15,792 INFO L225 Difference]: With dead ends: 101447 [2018-09-10 10:28:15,793 INFO L226 Difference]: Without dead ends: 71940 [2018-09-10 10:28:15,937 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 872 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2018-09-10 10:28:15,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71940 states. [2018-09-10 10:28:17,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71940 to 71499. [2018-09-10 10:28:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71499 states. [2018-09-10 10:28:17,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71499 states to 71499 states and 101114 transitions. [2018-09-10 10:28:17,977 INFO L78 Accepts]: Start accepts. Automaton has 71499 states and 101114 transitions. Word has length 220 [2018-09-10 10:28:17,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:28:17,978 INFO L480 AbstractCegarLoop]: Abstraction has 71499 states and 101114 transitions. [2018-09-10 10:28:17,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:28:17,978 INFO L276 IsEmpty]: Start isEmpty. Operand 71499 states and 101114 transitions. [2018-09-10 10:28:18,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-10 10:28:18,114 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:28:18,114 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:28:18,114 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:28:18,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1752810080, now seen corresponding path program 1 times [2018-09-10 10:28:18,115 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:28:18,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:18,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:18,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:18,118 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:28:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:18,716 WARN L175 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-10 10:28:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:28:18,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:28:18,902 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:28:18,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:18,917 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:28:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:19,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:28:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-10 10:28:19,356 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:28:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-10 10:28:19,750 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 10:28:19,750 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-10 10:28:19,750 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:28:19,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:28:19,751 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:28:19,751 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:28:19,751 INFO L87 Difference]: Start difference. First operand 71499 states and 101114 transitions. Second operand 3 states. [2018-09-10 10:28:21,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:28:21,725 INFO L93 Difference]: Finished difference Result 128795 states and 180955 transitions. [2018-09-10 10:28:21,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:28:21,726 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 238 [2018-09-10 10:28:21,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:28:22,691 INFO L225 Difference]: With dead ends: 128795 [2018-09-10 10:28:22,691 INFO L226 Difference]: Without dead ends: 70556 [2018-09-10 10:28:22,800 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 474 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:28:22,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70556 states. [2018-09-10 10:28:23,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70556 to 70483. [2018-09-10 10:28:23,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70483 states. [2018-09-10 10:28:24,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70483 states to 70483 states and 97031 transitions. [2018-09-10 10:28:24,114 INFO L78 Accepts]: Start accepts. Automaton has 70483 states and 97031 transitions. Word has length 238 [2018-09-10 10:28:24,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:28:24,115 INFO L480 AbstractCegarLoop]: Abstraction has 70483 states and 97031 transitions. [2018-09-10 10:28:24,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:28:24,115 INFO L276 IsEmpty]: Start isEmpty. Operand 70483 states and 97031 transitions. [2018-09-10 10:28:24,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-09-10 10:28:24,188 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:28:24,189 INFO L376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:28:24,189 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:28:24,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1445813146, now seen corresponding path program 1 times [2018-09-10 10:28:24,189 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:28:24,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:24,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:24,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:24,191 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:28:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:28:24,461 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:28:24,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 10:28:24,462 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:28:24,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:28:24,462 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:28:24,462 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 10:28:24,463 INFO L87 Difference]: Start difference. First operand 70483 states and 97031 transitions. Second operand 6 states. [2018-09-10 10:28:27,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:28:27,710 INFO L93 Difference]: Finished difference Result 163503 states and 231210 transitions. [2018-09-10 10:28:27,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 10:28:27,710 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 250 [2018-09-10 10:28:27,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:28:28,088 INFO L225 Difference]: With dead ends: 163503 [2018-09-10 10:28:28,088 INFO L226 Difference]: Without dead ends: 94099 [2018-09-10 10:28:28,208 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-10 10:28:28,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94099 states. [2018-09-10 10:28:29,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94099 to 93489. [2018-09-10 10:28:29,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93489 states. [2018-09-10 10:28:30,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93489 states to 93489 states and 122534 transitions. [2018-09-10 10:28:30,081 INFO L78 Accepts]: Start accepts. Automaton has 93489 states and 122534 transitions. Word has length 250 [2018-09-10 10:28:30,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:28:30,081 INFO L480 AbstractCegarLoop]: Abstraction has 93489 states and 122534 transitions. [2018-09-10 10:28:30,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:28:30,081 INFO L276 IsEmpty]: Start isEmpty. Operand 93489 states and 122534 transitions. [2018-09-10 10:28:30,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-09-10 10:28:30,175 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:28:30,176 INFO L376 BasicCegarLoop]: trace histogram [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, 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] [2018-09-10 10:28:30,176 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:28:30,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1799810991, now seen corresponding path program 1 times [2018-09-10 10:28:30,177 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:28:30,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:30,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:30,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:30,178 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:28:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:30,749 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 122 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-10 10:28:30,749 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:28:30,749 INFO L197 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 [2018-09-10 10:28:30,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:30,766 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:28:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:31,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:28:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 122 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-10 10:28:31,283 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:28:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 122 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-10 10:28:32,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:28:32,023 INFO L197 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 [2018-09-10 10:28:32,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:32,040 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:28:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:33,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:28:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 78 proven. 46 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-10 10:28:33,821 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:28:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 122 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-10 10:28:33,955 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:28:33,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 5] total 9 [2018-09-10 10:28:33,955 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:28:33,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:28:33,957 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:28:33,957 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-09-10 10:28:33,957 INFO L87 Difference]: Start difference. First operand 93489 states and 122534 transitions. Second operand 6 states. [2018-09-10 10:28:38,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:28:38,043 INFO L93 Difference]: Finished difference Result 170454 states and 234748 transitions. [2018-09-10 10:28:38,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 10:28:38,044 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 270 [2018-09-10 10:28:38,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:28:38,290 INFO L225 Difference]: With dead ends: 170454 [2018-09-10 10:28:38,290 INFO L226 Difference]: Without dead ends: 78119 [2018-09-10 10:28:38,438 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1090 GetRequests, 1074 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-09-10 10:28:38,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78119 states. [2018-09-10 10:28:40,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78119 to 76781. [2018-09-10 10:28:40,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76781 states. [2018-09-10 10:28:40,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76781 states to 76781 states and 98681 transitions. [2018-09-10 10:28:40,781 INFO L78 Accepts]: Start accepts. Automaton has 76781 states and 98681 transitions. Word has length 270 [2018-09-10 10:28:40,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:28:40,781 INFO L480 AbstractCegarLoop]: Abstraction has 76781 states and 98681 transitions. [2018-09-10 10:28:40,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:28:40,781 INFO L276 IsEmpty]: Start isEmpty. Operand 76781 states and 98681 transitions. [2018-09-10 10:28:40,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-09-10 10:28:40,849 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:28:40,850 INFO L376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:28:40,850 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:28:40,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1833719766, now seen corresponding path program 1 times [2018-09-10 10:28:40,850 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:28:40,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:40,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:40,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:40,851 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:28:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 122 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:28:41,472 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:28:41,473 INFO L197 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 [2018-09-10 10:28:41,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:41,487 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:28:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:41,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:28:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-10 10:28:41,961 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:28:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-10 10:28:42,467 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 10:28:42,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-10 10:28:42,467 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:28:42,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:28:42,468 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:28:42,468 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:28:42,468 INFO L87 Difference]: Start difference. First operand 76781 states and 98681 transitions. Second operand 3 states. [2018-09-10 10:28:44,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:28:44,261 INFO L93 Difference]: Finished difference Result 130099 states and 167003 transitions. [2018-09-10 10:28:44,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:28:44,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 295 [2018-09-10 10:28:44,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:28:44,483 INFO L225 Difference]: With dead ends: 130099 [2018-09-10 10:28:44,484 INFO L226 Difference]: Without dead ends: 74985 [2018-09-10 10:28:44,590 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 588 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:28:44,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74985 states. [2018-09-10 10:28:46,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74985 to 74818. [2018-09-10 10:28:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74818 states. [2018-09-10 10:28:46,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74818 states to 74818 states and 92506 transitions. [2018-09-10 10:28:46,519 INFO L78 Accepts]: Start accepts. Automaton has 74818 states and 92506 transitions. Word has length 295 [2018-09-10 10:28:46,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:28:46,520 INFO L480 AbstractCegarLoop]: Abstraction has 74818 states and 92506 transitions. [2018-09-10 10:28:46,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:28:46,520 INFO L276 IsEmpty]: Start isEmpty. Operand 74818 states and 92506 transitions. [2018-09-10 10:28:46,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-09-10 10:28:46,586 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:28:46,586 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:28:46,586 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:28:46,586 INFO L82 PathProgramCache]: Analyzing trace with hash -154969225, now seen corresponding path program 1 times [2018-09-10 10:28:46,586 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:28:46,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:46,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:46,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:46,587 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:28:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 143 proven. 36 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-09-10 10:28:47,116 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:28:47,116 INFO L197 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 [2018-09-10 10:28:47,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:47,124 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:28:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:47,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:28:47,537 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-09-10 10:28:47,538 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:28:47,687 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 158 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-09-10 10:28:47,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:28:47,710 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 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 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:28:47,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:47,725 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:28:48,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:48,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:28:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-09-10 10:28:49,191 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:28:49,446 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 158 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-09-10 10:28:49,449 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:28:49,449 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-10 10:28:49,449 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:28:49,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:28:49,452 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:28:49,452 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-10 10:28:49,452 INFO L87 Difference]: Start difference. First operand 74818 states and 92506 transitions. Second operand 9 states. [2018-09-10 10:28:55,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:28:55,071 INFO L93 Difference]: Finished difference Result 201060 states and 255419 transitions. [2018-09-10 10:28:55,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-10 10:28:55,072 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 314 [2018-09-10 10:28:55,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:28:55,563 INFO L225 Difference]: With dead ends: 201060 [2018-09-10 10:28:55,563 INFO L226 Difference]: Without dead ends: 130074 [2018-09-10 10:28:55,707 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1271 GetRequests, 1249 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2018-09-10 10:28:55,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130074 states. [2018-09-10 10:28:58,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130074 to 124781. [2018-09-10 10:28:58,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124781 states. [2018-09-10 10:28:58,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124781 states to 124781 states and 151054 transitions. [2018-09-10 10:28:58,434 INFO L78 Accepts]: Start accepts. Automaton has 124781 states and 151054 transitions. Word has length 314 [2018-09-10 10:28:58,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:28:58,434 INFO L480 AbstractCegarLoop]: Abstraction has 124781 states and 151054 transitions. [2018-09-10 10:28:58,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:28:58,434 INFO L276 IsEmpty]: Start isEmpty. Operand 124781 states and 151054 transitions. [2018-09-10 10:28:58,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2018-09-10 10:28:58,541 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:28:58,542 INFO L376 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:28:58,542 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:28:58,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1388407402, now seen corresponding path program 1 times [2018-09-10 10:28:58,542 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:28:58,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:58,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:58,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:58,543 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:28:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:59,201 WARN L175 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-10 10:28:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 167 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-10 10:28:59,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:28:59,455 INFO L197 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 [2018-09-10 10:28:59,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:59,463 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:28:59,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:59,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:28:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-09-10 10:28:59,964 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 147 proven. 70 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-09-10 10:29:00,340 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:29:00,340 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 6] total 15 [2018-09-10 10:29:00,340 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:29:00,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:29:00,341 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:29:00,341 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2018-09-10 10:29:00,342 INFO L87 Difference]: Start difference. First operand 124781 states and 151054 transitions. Second operand 6 states. [2018-09-10 10:29:07,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:07,196 INFO L93 Difference]: Finished difference Result 205224 states and 249455 transitions. [2018-09-10 10:29:07,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 10:29:07,197 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 345 [2018-09-10 10:29:07,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:07,544 INFO L225 Difference]: With dead ends: 205224 [2018-09-10 10:29:07,545 INFO L226 Difference]: Without dead ends: 126731 [2018-09-10 10:29:07,644 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 682 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-09-10 10:29:07,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126731 states. [2018-09-10 10:29:09,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126731 to 125210. [2018-09-10 10:29:09,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125210 states. [2018-09-10 10:29:10,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125210 states to 125210 states and 151472 transitions. [2018-09-10 10:29:10,059 INFO L78 Accepts]: Start accepts. Automaton has 125210 states and 151472 transitions. Word has length 345 [2018-09-10 10:29:10,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:10,059 INFO L480 AbstractCegarLoop]: Abstraction has 125210 states and 151472 transitions. [2018-09-10 10:29:10,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:29:10,060 INFO L276 IsEmpty]: Start isEmpty. Operand 125210 states and 151472 transitions. [2018-09-10 10:29:10,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-09-10 10:29:10,200 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:10,200 INFO L376 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:29:10,200 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:29:10,201 INFO L82 PathProgramCache]: Analyzing trace with hash 156648908, now seen corresponding path program 1 times [2018-09-10 10:29:10,201 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:10,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:10,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:10,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:10,202 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:10,602 WARN L175 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:29:11,939 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 176 proven. 86 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:29:11,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:11,940 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:29:11,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:11,948 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:12,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 204 proven. 2 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-10 10:29:12,338 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:12,542 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 190 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-10 10:29:12,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:12,564 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:29:12,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:12,579 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:13,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 204 proven. 2 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-10 10:29:13,437 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 190 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-10 10:29:13,579 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:29:13,580 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 15 [2018-09-10 10:29:13,581 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:29:13,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-10 10:29:13,582 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-10 10:29:13,582 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-09-10 10:29:13,582 INFO L87 Difference]: Start difference. First operand 125210 states and 151472 transitions. Second operand 13 states. [2018-09-10 10:29:24,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:24,759 INFO L93 Difference]: Finished difference Result 369287 states and 490573 transitions. [2018-09-10 10:29:24,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-10 10:29:24,759 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 366 [2018-09-10 10:29:24,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:25,552 INFO L225 Difference]: With dead ends: 369287 [2018-09-10 10:29:25,553 INFO L226 Difference]: Without dead ends: 248312 [2018-09-10 10:29:25,775 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1523 GetRequests, 1481 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2018-09-10 10:29:25,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248312 states. [2018-09-10 10:29:30,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248312 to 243030. [2018-09-10 10:29:30,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243030 states. [2018-09-10 10:29:32,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243030 states to 243030 states and 311632 transitions. [2018-09-10 10:29:32,673 INFO L78 Accepts]: Start accepts. Automaton has 243030 states and 311632 transitions. Word has length 366 [2018-09-10 10:29:32,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:32,673 INFO L480 AbstractCegarLoop]: Abstraction has 243030 states and 311632 transitions. [2018-09-10 10:29:32,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-10 10:29:32,673 INFO L276 IsEmpty]: Start isEmpty. Operand 243030 states and 311632 transitions. [2018-09-10 10:29:32,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-09-10 10:29:32,974 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:32,975 INFO L376 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:29:32,975 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:29:32,975 INFO L82 PathProgramCache]: Analyzing trace with hash 931388912, now seen corresponding path program 1 times [2018-09-10 10:29:32,975 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:32,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:32,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:32,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:32,976 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:33,368 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 192 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-10 10:29:33,368 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:33,368 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:29:33,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:33,378 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:33,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:33,831 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 206 proven. 2 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-10 10:29:33,832 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 192 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-10 10:29:34,107 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:34,108 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 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 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:29:34,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:34,125 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:34,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 206 proven. 2 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-10 10:29:35,083 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 182 proven. 82 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:29:35,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:29:35,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 8, 8] total 19 [2018-09-10 10:29:35,489 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:29:35,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 10:29:35,491 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 10:29:35,491 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2018-09-10 10:29:35,492 INFO L87 Difference]: Start difference. First operand 243030 states and 311632 transitions. Second operand 7 states. [2018-09-10 10:29:44,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:44,828 INFO L93 Difference]: Finished difference Result 524628 states and 693407 transitions. [2018-09-10 10:29:44,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-10 10:29:44,829 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 368 [2018-09-10 10:29:44,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:45,980 INFO L225 Difference]: With dead ends: 524628 [2018-09-10 10:29:45,980 INFO L226 Difference]: Without dead ends: 287524 [2018-09-10 10:29:46,381 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1483 GetRequests, 1460 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2018-09-10 10:29:46,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287524 states. [2018-09-10 10:29:54,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287524 to 281779. [2018-09-10 10:29:54,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281779 states. [2018-09-10 10:29:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281779 states to 281779 states and 363073 transitions. [2018-09-10 10:29:55,263 INFO L78 Accepts]: Start accepts. Automaton has 281779 states and 363073 transitions. Word has length 368 [2018-09-10 10:29:55,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:55,263 INFO L480 AbstractCegarLoop]: Abstraction has 281779 states and 363073 transitions. [2018-09-10 10:29:55,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 10:29:55,263 INFO L276 IsEmpty]: Start isEmpty. Operand 281779 states and 363073 transitions. [2018-09-10 10:29:55,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2018-09-10 10:29:55,514 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:55,514 INFO L376 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 10:29:55,514 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:29:55,515 INFO L82 PathProgramCache]: Analyzing trace with hash -129346682, now seen corresponding path program 1 times [2018-09-10 10:29:55,515 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:55,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:55,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:55,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:55,516 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:55,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 247 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:55,980 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:55,980 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:29:55,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:55,990 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:56,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-10 10:29:56,508 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:30:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 186 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:30:02,786 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:30:02,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-10 10:30:02,786 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:30:02,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:30:02,787 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:30:02,787 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-09-10 10:30:02,788 INFO L87 Difference]: Start difference. First operand 281779 states and 363073 transitions. Second operand 5 states. [2018-09-10 10:30:15,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:30:15,290 INFO L93 Difference]: Finished difference Result 701955 states and 951048 transitions. [2018-09-10 10:30:15,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 10:30:15,290 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 381 [2018-09-10 10:30:15,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:30:18,472 INFO L225 Difference]: With dead ends: 701955 [2018-09-10 10:30:18,472 INFO L226 Difference]: Without dead ends: 551507 [2018-09-10 10:30:18,800 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 768 GetRequests, 758 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-09-10 10:30:19,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551507 states. [2018-09-10 10:30:33,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551507 to 537082. [2018-09-10 10:30:33,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537082 states. [2018-09-10 10:30:37,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537082 states to 537082 states and 690138 transitions. [2018-09-10 10:30:37,094 INFO L78 Accepts]: Start accepts. Automaton has 537082 states and 690138 transitions. Word has length 381 [2018-09-10 10:30:37,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:30:37,095 INFO L480 AbstractCegarLoop]: Abstraction has 537082 states and 690138 transitions. [2018-09-10 10:30:37,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:30:37,095 INFO L276 IsEmpty]: Start isEmpty. Operand 537082 states and 690138 transitions. [2018-09-10 10:30:37,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2018-09-10 10:30:37,462 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:30:37,463 INFO L376 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 10:30:37,463 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:30:37,463 INFO L82 PathProgramCache]: Analyzing trace with hash -652357671, now seen corresponding path program 1 times [2018-09-10 10:30:37,463 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:30:37,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:37,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:37,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:37,464 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:30:37,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 290 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:30:38,123 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:30:38,124 INFO L197 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 [2018-09-10 10:30:38,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:38,134 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:30:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:38,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:30:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2018-09-10 10:30:38,651 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:30:40,261 WARN L175 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2018-09-10 10:30:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 192 proven. 92 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-09-10 10:30:40,659 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:30:40,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 15 [2018-09-10 10:30:40,660 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:30:40,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:30:40,660 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:30:40,660 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2018-09-10 10:30:40,661 INFO L87 Difference]: Start difference. First operand 537082 states and 690138 transitions. Second operand 5 states. Received shutdown request... [2018-09-10 10:30:58,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 10:30:58,356 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 10:30:58,363 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 10:30:58,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 10:30:58 BoogieIcfgContainer [2018-09-10 10:30:58,363 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 10:30:58,364 INFO L168 Benchmark]: Toolchain (without parser) took 213806.83 ms. Allocated memory was 1.5 GB in the beginning and 6.4 GB in the end (delta: 4.9 GB). Free memory was 1.4 GB in the beginning and 4.7 GB in the end (delta: -3.3 GB). Peak memory consumption was 4.8 GB. Max. memory is 7.1 GB. [2018-09-10 10:30:58,366 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-10 10:30:58,366 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1197.56 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-09-10 10:30:58,367 INFO L168 Benchmark]: Boogie Procedure Inliner took 132.21 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-10 10:30:58,367 INFO L168 Benchmark]: Boogie Preprocessor took 366.42 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 803.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -939.0 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. [2018-09-10 10:30:58,368 INFO L168 Benchmark]: RCFGBuilder took 5367.70 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 286.9 MB). Peak memory consumption was 286.9 MB. Max. memory is 7.1 GB. [2018-09-10 10:30:58,369 INFO L168 Benchmark]: TraceAbstraction took 206736.17 ms. Allocated memory was 2.3 GB in the beginning and 6.4 GB in the end (delta: 4.1 GB). Free memory was 2.0 GB in the beginning and 4.7 GB in the end (delta: -2.8 GB). Peak memory consumption was 4.5 GB. Max. memory is 7.1 GB. [2018-09-10 10:30:58,382 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1197.56 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 132.21 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 366.42 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 803.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -939.0 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5367.70 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 286.9 MB). Peak memory consumption was 286.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 206736.17 ms. Allocated memory was 2.3 GB in the beginning and 6.4 GB in the end (delta: 4.1 GB). Free memory was 2.0 GB in the beginning and 4.7 GB in the end (delta: -2.8 GB). Peak memory consumption was 4.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1575]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1575). Cancelled while BasicCegarLoop was constructing difference of abstraction (537082states) and FLOYD_HOARE automaton (currently 8 states, 5 states before enhancement), while ReachableStatesComputation was computing reachable states (886776 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 206.6s OverallTime, 16 OverallIterations, 5 TraceHistogramMax, 117.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3417 SDtfs, 21210 SDslu, 4449 SDs, 0 SdLazy, 28354 SolverSat, 6139 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 47.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10543 GetRequests, 10293 SyntacticMatches, 31 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 12.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=537082occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 50.4s AutomataMinimizationTime, 15 MinimizatonAttempts, 36323 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.2s SsaConstructionTime, 7.2s SatisfiabilityAnalysisTime, 26.2s InterpolantComputationTime, 9594 NumberOfCodeBlocks, 9594 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 14695 ConstructedInterpolants, 0 QuantifiedInterpolants, 9965049 SizeOfPredicates, 52 NumberOfNonLiveVariables, 20876 ConjunctsInSsa, 149 ConjunctsInUnsatCore, 50 InterpolantComputations, 12 PerfectInterpolantSequences, 7340/8011 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label25_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_10-30-58-411.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label25_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_10-30-58-411.csv Completed graceful shutdown