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-ddc4263 [2018-08-07 11:03:38,781 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-08-07 11:03:38,783 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-08-07 11:03:38,803 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-08-07 11:03:38,803 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-08-07 11:03:38,805 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-08-07 11:03:38,807 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-08-07 11:03:38,810 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-08-07 11:03:38,811 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-08-07 11:03:38,812 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-08-07 11:03:38,813 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-08-07 11:03:38,814 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-08-07 11:03:38,815 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-08-07 11:03:38,816 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-08-07 11:03:38,820 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-08-07 11:03:38,821 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-08-07 11:03:38,826 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-08-07 11:03:38,829 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-08-07 11:03:38,833 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-08-07 11:03:38,838 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-08-07 11:03:38,841 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-08-07 11:03:38,843 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-08-07 11:03:38,847 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-08-07 11:03:38,847 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-08-07 11:03:38,848 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-08-07 11:03:38,849 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-08-07 11:03:38,850 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-08-07 11:03:38,851 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-08-07 11:03:38,855 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-08-07 11:03:38,856 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-08-07 11:03:38,856 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-08-07 11:03:38,860 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-08-07 11:03:38,861 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-08-07 11:03:38,861 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-08-07 11:03:38,864 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-08-07 11:03:38,865 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-08-07 11:03:38,865 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 [2018-08-07 11:03:38,894 INFO L110 SettingsManager]: Loading preferences was successful [2018-08-07 11:03:38,894 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-08-07 11:03:38,895 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-08-07 11:03:38,898 INFO L133 SettingsManager]: * User list type=DISABLED [2018-08-07 11:03:38,898 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-08-07 11:03:38,898 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-08-07 11:03:38,898 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-08-07 11:03:38,899 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-08-07 11:03:38,899 INFO L133 SettingsManager]: * Log string format=TERM [2018-08-07 11:03:38,899 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-08-07 11:03:38,899 INFO L133 SettingsManager]: * Interval Domain=false [2018-08-07 11:03:38,900 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-08-07 11:03:38,900 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-08-07 11:03:38,901 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-08-07 11:03:38,902 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-08-07 11:03:38,902 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-08-07 11:03:38,902 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-08-07 11:03:38,902 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-08-07 11:03:38,902 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-08-07 11:03:38,903 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-08-07 11:03:38,903 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-08-07 11:03:38,903 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-08-07 11:03:38,903 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-08-07 11:03:38,905 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 11:03:38,905 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-08-07 11:03:38,905 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-08-07 11:03:38,905 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-08-07 11:03:38,905 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-08-07 11:03:38,906 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-08-07 11:03:38,906 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-08-07 11:03:38,906 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-08-07 11:03:38,906 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-08-07 11:03:38,907 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-08-07 11:03:38,966 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-08-07 11:03:38,983 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-08-07 11:03:38,988 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-08-07 11:03:38,990 INFO L271 PluginConnector]: Initializing CDTParser... [2018-08-07 11:03:38,991 INFO L276 PluginConnector]: CDTParser initialized [2018-08-07 11:03:38,992 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label25_true-unreach-call.c [2018-08-07 11:03:39,330 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c29280caf/073783ebbc904417af2dd56047af5c1c/FLAG009f5ab5f [2018-08-07 11:03:39,687 INFO L276 CDTParser]: Found 1 translation units. [2018-08-07 11:03:39,687 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label25_true-unreach-call.c [2018-08-07 11:03:39,715 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c29280caf/073783ebbc904417af2dd56047af5c1c/FLAG009f5ab5f [2018-08-07 11:03:39,735 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c29280caf/073783ebbc904417af2dd56047af5c1c [2018-08-07 11:03:39,749 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-08-07 11:03:39,752 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-08-07 11:03:39,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-08-07 11:03:39,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-08-07 11:03:39,763 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-08-07 11:03:39,764 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 11:03:39" (1/1) ... [2018-08-07 11:03:39,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@506950c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:03:39, skipping insertion in model container [2018-08-07 11:03:39,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 11:03:39" (1/1) ... [2018-08-07 11:03:40,001 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-08-07 11:03:40,529 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 11:03:40,546 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-08-07 11:03:40,861 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 11:03:40,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:03:40 WrapperNode [2018-08-07 11:03:40,938 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-08-07 11:03:40,939 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-08-07 11:03:40,939 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-08-07 11:03:40,939 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-08-07 11:03:40,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:03:40" (1/1) ... [2018-08-07 11:03:40,983 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:03:40" (1/1) ... [2018-08-07 11:03:41,103 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-08-07 11:03:41,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-08-07 11:03:41,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-08-07 11:03:41,104 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-08-07 11:03:41,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:03:40" (1/1) ... [2018-08-07 11:03:41,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:03:40" (1/1) ... [2018-08-07 11:03:41,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:03:40" (1/1) ... [2018-08-07 11:03:41,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:03:40" (1/1) ... [2018-08-07 11:03:41,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:03:40" (1/1) ... [2018-08-07 11:03:41,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:03:40" (1/1) ... [2018-08-07 11:03:41,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:03:40" (1/1) ... [2018-08-07 11:03:41,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-08-07 11:03:41,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-08-07 11:03:41,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-08-07 11:03:41,480 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-08-07 11:03:41,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:03:40" (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 [2018-08-07 11:03:41,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-08-07 11:03:41,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-08-07 11:03:41,548 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 [2018-08-07 11:03:41,549 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 [2018-08-07 11:03:41,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-08-07 11:03:41,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-08-07 11:03:41,549 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-08-07 11:03:41,549 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-08-07 11:03:46,456 INFO L273 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-08-07 11:03:46,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 11:03:46 BoogieIcfgContainer [2018-08-07 11:03:46,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-08-07 11:03:46,460 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-08-07 11:03:46,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-08-07 11:03:46,464 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-08-07 11:03:46,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.08 11:03:39" (1/3) ... [2018-08-07 11:03:46,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@105424eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 11:03:46, skipping insertion in model container [2018-08-07 11:03:46,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:03:40" (2/3) ... [2018-08-07 11:03:46,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@105424eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 11:03:46, skipping insertion in model container [2018-08-07 11:03:46,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 11:03:46" (3/3) ... [2018-08-07 11:03:46,472 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label25_true-unreach-call.c [2018-08-07 11:03:46,488 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-08-07 11:03:46,502 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-08-07 11:03:46,575 INFO L129 ementStrategyFactory]: Using default assertion order modulation [2018-08-07 11:03:46,575 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-08-07 11:03:46,576 INFO L382 AbstractCegarLoop]: Hoare is true [2018-08-07 11:03:46,576 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-08-07 11:03:46,576 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-08-07 11:03:46,576 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-08-07 11:03:46,576 INFO L386 AbstractCegarLoop]: Difference is false [2018-08-07 11:03:46,576 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-08-07 11:03:46,577 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-08-07 11:03:46,617 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-08-07 11:03:46,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-08-07 11:03:46,650 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:03:46,654 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] [2018-08-07 11:03:46,655 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]=== [2018-08-07 11:03:46,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1441765812, now seen corresponding path program 1 times [2018-08-07 11:03:46,666 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:03:46,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:03:46,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:03:46,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:03:46,724 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:03:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:03:47,619 WARN L170 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 11:03:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:03:47,853 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 11:03:47,853 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-08-07 11:03:47,853 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 11:03:47,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 11:03:47,876 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 11:03:47,877 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 11:03:47,879 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-08-07 11:03:50,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:03:50,064 INFO L93 Difference]: Finished difference Result 844 states and 1489 transitions. [2018-08-07 11:03:50,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 11:03:50,067 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 187 [2018-08-07 11:03:50,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:03:50,094 INFO L225 Difference]: With dead ends: 844 [2018-08-07 11:03:50,095 INFO L226 Difference]: Without dead ends: 530 [2018-08-07 11:03:50,101 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 11:03:50,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2018-08-07 11:03:50,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 525. [2018-08-07 11:03:50,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2018-08-07 11:03:50,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 865 transitions. [2018-08-07 11:03:50,194 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 865 transitions. Word has length 187 [2018-08-07 11:03:50,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:03:50,196 INFO L480 AbstractCegarLoop]: Abstraction has 525 states and 865 transitions. [2018-08-07 11:03:50,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 11:03:50,196 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 865 transitions. [2018-08-07 11:03:50,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-08-07 11:03:50,204 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:03:50,205 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] [2018-08-07 11:03:50,205 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]=== [2018-08-07 11:03:50,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1899321928, now seen corresponding path program 1 times [2018-08-07 11:03:50,206 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:03:50,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:03:50,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:03:50,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:03:50,208 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:03:50,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:03:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:03:50,757 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 11:03:50,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-08-07 11:03:50,757 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 11:03:50,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 11:03:50,760 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 11:03:50,760 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 11:03:50,764 INFO L87 Difference]: Start difference. First operand 525 states and 865 transitions. Second operand 3 states. [2018-08-07 11:03:52,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:03:52,703 INFO L93 Difference]: Finished difference Result 1473 states and 2495 transitions. [2018-08-07 11:03:52,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 11:03:52,703 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 200 [2018-08-07 11:03:52,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:03:52,716 INFO L225 Difference]: With dead ends: 1473 [2018-08-07 11:03:52,717 INFO L226 Difference]: Without dead ends: 954 [2018-08-07 11:03:52,720 INFO L603 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 [2018-08-07 11:03:52,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2018-08-07 11:03:52,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 953. [2018-08-07 11:03:52,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 953 states. [2018-08-07 11:03:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1483 transitions. [2018-08-07 11:03:52,775 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1483 transitions. Word has length 200 [2018-08-07 11:03:52,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:03:52,775 INFO L480 AbstractCegarLoop]: Abstraction has 953 states and 1483 transitions. [2018-08-07 11:03:52,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 11:03:52,776 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1483 transitions. [2018-08-07 11:03:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-08-07 11:03:52,780 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:03:52,781 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] [2018-08-07 11:03:52,781 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]=== [2018-08-07 11:03:52,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1892368660, now seen corresponding path program 1 times [2018-08-07 11:03:52,782 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:03:52,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:03:52,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:03:52,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:03:52,783 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:03:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:03:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:03:53,117 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 11:03:53,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-08-07 11:03:53,118 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 11:03:53,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 11:03:53,119 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 11:03:53,119 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 11:03:53,119 INFO L87 Difference]: Start difference. First operand 953 states and 1483 transitions. Second operand 3 states. [2018-08-07 11:03:55,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:03:55,651 INFO L93 Difference]: Finished difference Result 2751 states and 4392 transitions. [2018-08-07 11:03:55,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 11:03:55,652 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 202 [2018-08-07 11:03:55,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:03:55,664 INFO L225 Difference]: With dead ends: 2751 [2018-08-07 11:03:55,664 INFO L226 Difference]: Without dead ends: 1804 [2018-08-07 11:03:55,669 INFO L603 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 [2018-08-07 11:03:55,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2018-08-07 11:03:55,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1787. [2018-08-07 11:03:55,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1787 states. [2018-08-07 11:03:55,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 2763 transitions. [2018-08-07 11:03:55,733 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 2763 transitions. Word has length 202 [2018-08-07 11:03:55,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:03:55,737 INFO L480 AbstractCegarLoop]: Abstraction has 1787 states and 2763 transitions. [2018-08-07 11:03:55,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 11:03:55,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 2763 transitions. [2018-08-07 11:03:55,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-08-07 11:03:55,748 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:03:55,748 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] [2018-08-07 11:03:55,748 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]=== [2018-08-07 11:03:55,749 INFO L82 PathProgramCache]: Analyzing trace with hash -271483371, now seen corresponding path program 1 times [2018-08-07 11:03:55,749 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:03:55,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:03:55,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:03:55,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:03:55,750 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:03:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:03:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:03:56,024 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 11:03:56,024 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-08-07 11:03:56,025 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 11:03:56,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-08-07 11:03:56,026 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-08-07 11:03:56,026 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-08-07 11:03:56,026 INFO L87 Difference]: Start difference. First operand 1787 states and 2763 transitions. Second operand 7 states. [2018-08-07 11:03:59,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:03:59,243 INFO L93 Difference]: Finished difference Result 5547 states and 9902 transitions. [2018-08-07 11:03:59,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-08-07 11:03:59,253 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 205 [2018-08-07 11:03:59,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:03:59,294 INFO L225 Difference]: With dead ends: 5547 [2018-08-07 11:03:59,294 INFO L226 Difference]: Without dead ends: 3766 [2018-08-07 11:03:59,304 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-08-07 11:03:59,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3766 states. [2018-08-07 11:03:59,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3766 to 3581. [2018-08-07 11:03:59,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3581 states. [2018-08-07 11:03:59,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 5681 transitions. [2018-08-07 11:03:59,468 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 5681 transitions. Word has length 205 [2018-08-07 11:03:59,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:03:59,468 INFO L480 AbstractCegarLoop]: Abstraction has 3581 states and 5681 transitions. [2018-08-07 11:03:59,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-08-07 11:03:59,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 5681 transitions. [2018-08-07 11:03:59,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-08-07 11:03:59,483 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:03:59,484 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] [2018-08-07 11:03:59,484 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]=== [2018-08-07 11:03:59,484 INFO L82 PathProgramCache]: Analyzing trace with hash -791871735, now seen corresponding path program 1 times [2018-08-07 11:03:59,484 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:03:59,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:03:59,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:03:59,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:03:59,486 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:03:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:03:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:03:59,766 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:03:59,766 INFO L194 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 [2018-08-07 11:03:59,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:03:59,777 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:04:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:04:00,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:04:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:04:00,599 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:04:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:04:01,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:04:01,416 INFO L194 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 [2018-08-07 11:04:01,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:04:01,435 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:04:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:04:01,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:04:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:04:02,140 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:04:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:04:02,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 11:04:02,315 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-08-07 11:04:02,315 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 11:04:02,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 11:04:02,316 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 11:04:02,318 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-08-07 11:04:02,318 INFO L87 Difference]: Start difference. First operand 3581 states and 5681 transitions. Second operand 9 states. [2018-08-07 11:04:19,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:04:19,258 INFO L93 Difference]: Finished difference Result 34338 states and 72510 transitions. [2018-08-07 11:04:19,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-08-07 11:04:19,258 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 214 [2018-08-07 11:04:19,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:04:19,540 INFO L225 Difference]: With dead ends: 34338 [2018-08-07 11:04:19,541 INFO L226 Difference]: Without dead ends: 30763 [2018-08-07 11:04:19,672 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 871 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2018-08-07 11:04:19,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30763 states. [2018-08-07 11:04:21,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30763 to 29543. [2018-08-07 11:04:21,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29543 states. [2018-08-07 11:04:21,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29543 states to 29543 states and 45390 transitions. [2018-08-07 11:04:21,116 INFO L78 Accepts]: Start accepts. Automaton has 29543 states and 45390 transitions. Word has length 214 [2018-08-07 11:04:21,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:04:21,116 INFO L480 AbstractCegarLoop]: Abstraction has 29543 states and 45390 transitions. [2018-08-07 11:04:21,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 11:04:21,117 INFO L276 IsEmpty]: Start isEmpty. Operand 29543 states and 45390 transitions. [2018-08-07 11:04:21,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-08-07 11:04:21,207 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:04:21,208 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] [2018-08-07 11:04:21,208 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]=== [2018-08-07 11:04:21,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1879895733, now seen corresponding path program 1 times [2018-08-07 11:04:21,208 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:04:21,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:04:21,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:04:21,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:04:21,210 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:04:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:04:21,720 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:04:21,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:04:21,720 INFO L194 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 [2018-08-07 11:04:21,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:04:21,736 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:04:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:04:21,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:04:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:04:22,119 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:04:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:04:22,416 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:04:22,416 INFO L194 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 [2018-08-07 11:04:22,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:04:22,435 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:04:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:04:23,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:04:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:04:23,441 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:04:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:04:23,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 11:04:23,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-08-07 11:04:23,761 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 11:04:23,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 11:04:23,762 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 11:04:23,762 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-08-07 11:04:23,762 INFO L87 Difference]: Start difference. First operand 29543 states and 45390 transitions. Second operand 9 states. [2018-08-07 11:04:28,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:04:28,033 INFO L93 Difference]: Finished difference Result 101447 states and 162765 transitions. [2018-08-07 11:04:28,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-08-07 11:04:28,042 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 220 [2018-08-07 11:04:28,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:04:28,368 INFO L225 Difference]: With dead ends: 101447 [2018-08-07 11:04:28,369 INFO L226 Difference]: Without dead ends: 71940 [2018-08-07 11:04:28,518 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 872 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2018-08-07 11:04:28,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71940 states. [2018-08-07 11:04:30,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71940 to 71499. [2018-08-07 11:04:30,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71499 states. [2018-08-07 11:04:30,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71499 states to 71499 states and 101114 transitions. [2018-08-07 11:04:30,753 INFO L78 Accepts]: Start accepts. Automaton has 71499 states and 101114 transitions. Word has length 220 [2018-08-07 11:04:30,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:04:30,753 INFO L480 AbstractCegarLoop]: Abstraction has 71499 states and 101114 transitions. [2018-08-07 11:04:30,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 11:04:30,753 INFO L276 IsEmpty]: Start isEmpty. Operand 71499 states and 101114 transitions. [2018-08-07 11:04:30,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-08-07 11:04:30,866 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:04:30,866 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] [2018-08-07 11:04:30,867 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]=== [2018-08-07 11:04:30,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1752810080, now seen corresponding path program 1 times [2018-08-07 11:04:30,868 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:04:30,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:04:30,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:04:30,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:04:30,870 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:04:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:04:31,454 WARN L170 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-08-07 11:04:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:04:31,651 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:04:31,651 INFO L194 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 [2018-08-07 11:04:31,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:04:31,670 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:04:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:04:31,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:04:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-08-07 11:04:32,019 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:04:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-08-07 11:04:32,147 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-08-07 11:04:32,147 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-08-07 11:04:32,147 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 11:04:32,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 11:04:32,148 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 11:04:32,148 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-08-07 11:04:32,148 INFO L87 Difference]: Start difference. First operand 71499 states and 101114 transitions. Second operand 3 states. [2018-08-07 11:04:34,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:04:34,889 INFO L93 Difference]: Finished difference Result 128795 states and 180955 transitions. [2018-08-07 11:04:34,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 11:04:34,890 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 238 [2018-08-07 11:04:34,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:04:35,206 INFO L225 Difference]: With dead ends: 128795 [2018-08-07 11:04:35,206 INFO L226 Difference]: Without dead ends: 70556 [2018-08-07 11:04:35,324 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 474 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-08-07 11:04:35,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70556 states. [2018-08-07 11:04:36,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70556 to 70483. [2018-08-07 11:04:36,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70483 states. [2018-08-07 11:04:36,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70483 states to 70483 states and 97031 transitions. [2018-08-07 11:04:36,738 INFO L78 Accepts]: Start accepts. Automaton has 70483 states and 97031 transitions. Word has length 238 [2018-08-07 11:04:36,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:04:36,739 INFO L480 AbstractCegarLoop]: Abstraction has 70483 states and 97031 transitions. [2018-08-07 11:04:36,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 11:04:36,741 INFO L276 IsEmpty]: Start isEmpty. Operand 70483 states and 97031 transitions. [2018-08-07 11:04:36,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-08-07 11:04:36,830 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:04:36,831 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] [2018-08-07 11:04:36,831 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]=== [2018-08-07 11:04:36,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1445813146, now seen corresponding path program 1 times [2018-08-07 11:04:36,832 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:04:36,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:04:36,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:04:36,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:04:36,834 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:04:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:04:37,173 WARN L170 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 11:04:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:04:37,616 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 11:04:37,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-08-07 11:04:37,617 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 11:04:37,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 11:04:37,618 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 11:04:37,618 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 11:04:37,618 INFO L87 Difference]: Start difference. First operand 70483 states and 97031 transitions. Second operand 6 states. [2018-08-07 11:04:41,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:04:41,537 INFO L93 Difference]: Finished difference Result 163503 states and 231210 transitions. [2018-08-07 11:04:41,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 11:04:41,538 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 250 [2018-08-07 11:04:41,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:04:41,933 INFO L225 Difference]: With dead ends: 163503 [2018-08-07 11:04:41,933 INFO L226 Difference]: Without dead ends: 94099 [2018-08-07 11:04:42,069 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-08-07 11:04:42,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94099 states. [2018-08-07 11:04:43,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94099 to 93489. [2018-08-07 11:04:43,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93489 states. [2018-08-07 11:04:43,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93489 states to 93489 states and 122534 transitions. [2018-08-07 11:04:43,883 INFO L78 Accepts]: Start accepts. Automaton has 93489 states and 122534 transitions. Word has length 250 [2018-08-07 11:04:43,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:04:43,884 INFO L480 AbstractCegarLoop]: Abstraction has 93489 states and 122534 transitions. [2018-08-07 11:04:43,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 11:04:43,884 INFO L276 IsEmpty]: Start isEmpty. Operand 93489 states and 122534 transitions. [2018-08-07 11:04:43,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-08-07 11:04:43,984 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:04:43,985 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] [2018-08-07 11:04:43,985 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]=== [2018-08-07 11:04:43,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1799810991, now seen corresponding path program 1 times [2018-08-07 11:04:43,986 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:04:43,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:04:43,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:04:43,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:04:43,987 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:04:44,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:04:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 122 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-08-07 11:04:44,546 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:04:44,546 INFO L194 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 [2018-08-07 11:04:44,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:04:44,562 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:04:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:04:44,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:04:45,013 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 122 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-08-07 11:04:45,013 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:04:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 122 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-08-07 11:04:45,162 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:04:45,163 INFO L194 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 [2018-08-07 11:04:45,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:04:45,178 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:04:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:04:46,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:04:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 78 proven. 46 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-08-07 11:04:46,695 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:04:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 122 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-08-07 11:04:46,814 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 11:04:46,814 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 5] total 9 [2018-08-07 11:04:46,814 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 11:04:46,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 11:04:46,815 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 11:04:46,815 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-08-07 11:04:46,816 INFO L87 Difference]: Start difference. First operand 93489 states and 122534 transitions. Second operand 6 states. [2018-08-07 11:04:51,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:04:51,102 INFO L93 Difference]: Finished difference Result 170454 states and 234748 transitions. [2018-08-07 11:04:51,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-08-07 11:04:51,102 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 270 [2018-08-07 11:04:51,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:04:51,347 INFO L225 Difference]: With dead ends: 170454 [2018-08-07 11:04:51,347 INFO L226 Difference]: Without dead ends: 78119 [2018-08-07 11:04:51,508 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1090 GetRequests, 1074 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-08-07 11:04:51,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78119 states. [2018-08-07 11:04:53,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78119 to 76781. [2018-08-07 11:04:53,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76781 states. [2018-08-07 11:04:54,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76781 states to 76781 states and 98681 transitions. [2018-08-07 11:04:54,020 INFO L78 Accepts]: Start accepts. Automaton has 76781 states and 98681 transitions. Word has length 270 [2018-08-07 11:04:54,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:04:54,020 INFO L480 AbstractCegarLoop]: Abstraction has 76781 states and 98681 transitions. [2018-08-07 11:04:54,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 11:04:54,021 INFO L276 IsEmpty]: Start isEmpty. Operand 76781 states and 98681 transitions. [2018-08-07 11:04:54,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-08-07 11:04:54,117 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:04:54,117 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] [2018-08-07 11:04:54,118 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]=== [2018-08-07 11:04:54,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1833719766, now seen corresponding path program 1 times [2018-08-07 11:04:54,118 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:04:54,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:04:54,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:04:54,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:04:54,119 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:04:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:04:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 122 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:04:54,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:04:54,412 INFO L194 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 [2018-08-07 11:04:54,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:04:54,423 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:04:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:04:54,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:04:54,744 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-08-07 11:04:54,744 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:04:54,832 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-08-07 11:04:54,853 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-08-07 11:04:54,853 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-08-07 11:04:54,854 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 11:04:54,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 11:04:54,854 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 11:04:54,854 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-08-07 11:04:54,855 INFO L87 Difference]: Start difference. First operand 76781 states and 98681 transitions. Second operand 3 states. [2018-08-07 11:04:56,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:04:56,806 INFO L93 Difference]: Finished difference Result 130099 states and 167003 transitions. [2018-08-07 11:04:56,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 11:04:56,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 295 [2018-08-07 11:04:56,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:04:57,065 INFO L225 Difference]: With dead ends: 130099 [2018-08-07 11:04:57,066 INFO L226 Difference]: Without dead ends: 74985 [2018-08-07 11:04:57,189 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 588 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-08-07 11:04:57,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74985 states. [2018-08-07 11:04:59,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74985 to 74818. [2018-08-07 11:04:59,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74818 states. [2018-08-07 11:04:59,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74818 states to 74818 states and 92506 transitions. [2018-08-07 11:04:59,204 INFO L78 Accepts]: Start accepts. Automaton has 74818 states and 92506 transitions. Word has length 295 [2018-08-07 11:04:59,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:04:59,204 INFO L480 AbstractCegarLoop]: Abstraction has 74818 states and 92506 transitions. [2018-08-07 11:04:59,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 11:04:59,205 INFO L276 IsEmpty]: Start isEmpty. Operand 74818 states and 92506 transitions. [2018-08-07 11:04:59,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-08-07 11:04:59,285 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:04:59,285 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] [2018-08-07 11:04:59,286 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]=== [2018-08-07 11:04:59,286 INFO L82 PathProgramCache]: Analyzing trace with hash -154969225, now seen corresponding path program 1 times [2018-08-07 11:04:59,286 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:04:59,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:04:59,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:04:59,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:04:59,287 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:04:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:04:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 143 proven. 36 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-08-07 11:04:59,542 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:04:59,542 INFO L194 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 [2018-08-07 11:04:59,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:04:59,550 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:04:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:04:59,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:04:59,970 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-08-07 11:04:59,970 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:05:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 158 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-08-07 11:05:00,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:05:00,090 INFO L194 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 [2018-08-07 11:05:00,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:05:00,107 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:05:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:05:00,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:05:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-08-07 11:05:01,506 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:05:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 158 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-08-07 11:05:01,754 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 11:05:01,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-08-07 11:05:01,755 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 11:05:01,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 11:05:01,756 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 11:05:01,756 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-08-07 11:05:01,756 INFO L87 Difference]: Start difference. First operand 74818 states and 92506 transitions. Second operand 9 states. [2018-08-07 11:05:07,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:05:07,609 INFO L93 Difference]: Finished difference Result 201060 states and 255419 transitions. [2018-08-07 11:05:07,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-08-07 11:05:07,610 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 314 [2018-08-07 11:05:07,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:05:08,084 INFO L225 Difference]: With dead ends: 201060 [2018-08-07 11:05:08,085 INFO L226 Difference]: Without dead ends: 130074 [2018-08-07 11:05:08,201 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1271 GetRequests, 1249 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2018-08-07 11:05:08,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130074 states. [2018-08-07 11:05:10,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130074 to 124781. [2018-08-07 11:05:10,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124781 states. [2018-08-07 11:05:10,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124781 states to 124781 states and 151054 transitions. [2018-08-07 11:05:10,289 INFO L78 Accepts]: Start accepts. Automaton has 124781 states and 151054 transitions. Word has length 314 [2018-08-07 11:05:10,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:05:10,289 INFO L480 AbstractCegarLoop]: Abstraction has 124781 states and 151054 transitions. [2018-08-07 11:05:10,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 11:05:10,289 INFO L276 IsEmpty]: Start isEmpty. Operand 124781 states and 151054 transitions. [2018-08-07 11:05:11,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2018-08-07 11:05:11,015 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:05:11,015 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] [2018-08-07 11:05:11,016 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]=== [2018-08-07 11:05:11,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1388407402, now seen corresponding path program 1 times [2018-08-07 11:05:11,016 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:05:11,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:05:11,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:05:11,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:05:11,017 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:05:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:05:11,363 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 167 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-08-07 11:05:11,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:05:11,363 INFO L194 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 [2018-08-07 11:05:11,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:05:11,372 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:05:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:05:11,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:05:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-08-07 11:05:11,859 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:05:12,241 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 147 proven. 70 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-08-07 11:05:12,263 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 11:05:12,264 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 6] total 15 [2018-08-07 11:05:12,264 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 11:05:12,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 11:05:12,265 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 11:05:12,265 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2018-08-07 11:05:12,265 INFO L87 Difference]: Start difference. First operand 124781 states and 151054 transitions. Second operand 6 states. [2018-08-07 11:05:15,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:05:15,953 INFO L93 Difference]: Finished difference Result 205224 states and 249455 transitions. [2018-08-07 11:05:15,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-08-07 11:05:15,954 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 345 [2018-08-07 11:05:15,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:05:16,451 INFO L225 Difference]: With dead ends: 205224 [2018-08-07 11:05:16,452 INFO L226 Difference]: Without dead ends: 126731 [2018-08-07 11:05:16,601 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 682 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-08-07 11:05:16,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126731 states. [2018-08-07 11:05:19,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126731 to 125210. [2018-08-07 11:05:19,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125210 states. [2018-08-07 11:05:19,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125210 states to 125210 states and 151472 transitions. [2018-08-07 11:05:19,833 INFO L78 Accepts]: Start accepts. Automaton has 125210 states and 151472 transitions. Word has length 345 [2018-08-07 11:05:19,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:05:19,833 INFO L480 AbstractCegarLoop]: Abstraction has 125210 states and 151472 transitions. [2018-08-07 11:05:19,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 11:05:19,834 INFO L276 IsEmpty]: Start isEmpty. Operand 125210 states and 151472 transitions. [2018-08-07 11:05:19,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-08-07 11:05:19,984 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:05:19,985 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] [2018-08-07 11:05:19,985 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]=== [2018-08-07 11:05:19,985 INFO L82 PathProgramCache]: Analyzing trace with hash 156648908, now seen corresponding path program 1 times [2018-08-07 11:05:19,985 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:05:19,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:05:19,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:05:19,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:05:19,986 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:05:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:05:20,336 WARN L170 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 11:05:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 176 proven. 86 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 11:05:21,283 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:05:21,283 INFO L194 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 [2018-08-07 11:05:21,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:05:21,291 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:05:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:05:21,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:05:22,224 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 204 proven. 2 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-08-07 11:05:22,224 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:05:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 190 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-08-07 11:05:22,401 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:05:22,401 INFO L194 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 [2018-08-07 11:05:22,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:05:22,418 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:05:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:05:23,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:05:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 204 proven. 2 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-08-07 11:05:23,247 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:05:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 190 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-08-07 11:05:23,409 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 11:05:23,410 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 15 [2018-08-07 11:05:23,410 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 11:05:23,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-08-07 11:05:23,411 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-08-07 11:05:23,411 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-08-07 11:05:23,411 INFO L87 Difference]: Start difference. First operand 125210 states and 151472 transitions. Second operand 13 states. [2018-08-07 11:05:37,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:05:37,390 INFO L93 Difference]: Finished difference Result 369287 states and 490573 transitions. [2018-08-07 11:05:37,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-08-07 11:05:37,390 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 366 [2018-08-07 11:05:37,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:05:38,864 INFO L225 Difference]: With dead ends: 369287 [2018-08-07 11:05:38,864 INFO L226 Difference]: Without dead ends: 248312 [2018-08-07 11:05:39,167 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1523 GetRequests, 1481 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2018-08-07 11:05:39,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248312 states. [2018-08-07 11:05:44,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248312 to 243030. [2018-08-07 11:05:44,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243030 states. [2018-08-07 11:05:45,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243030 states to 243030 states and 311632 transitions. [2018-08-07 11:05:45,770 INFO L78 Accepts]: Start accepts. Automaton has 243030 states and 311632 transitions. Word has length 366 [2018-08-07 11:05:45,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:05:45,770 INFO L480 AbstractCegarLoop]: Abstraction has 243030 states and 311632 transitions. [2018-08-07 11:05:45,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-08-07 11:05:45,770 INFO L276 IsEmpty]: Start isEmpty. Operand 243030 states and 311632 transitions. [2018-08-07 11:05:46,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-08-07 11:05:46,032 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:05:46,032 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] [2018-08-07 11:05:46,032 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]=== [2018-08-07 11:05:46,033 INFO L82 PathProgramCache]: Analyzing trace with hash 931388912, now seen corresponding path program 1 times [2018-08-07 11:05:46,033 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:05:46,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:05:46,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:05:46,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:05:46,034 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:05:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:05:46,561 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 192 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-08-07 11:05:46,561 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:05:46,561 INFO L194 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 [2018-08-07 11:05:46,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:05:46,569 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:05:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:05:46,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:05:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 206 proven. 2 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-08-07 11:05:46,961 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:05:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 192 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-08-07 11:05:48,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:05:48,198 INFO L194 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 [2018-08-07 11:05:48,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:05:48,214 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:05:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:05:48,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:05:49,352 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 206 proven. 2 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-08-07 11:05:49,352 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:05:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 182 proven. 82 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 11:05:49,776 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 11:05:49,777 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 8, 8] total 19 [2018-08-07 11:05:49,777 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 11:05:49,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-08-07 11:05:49,779 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-08-07 11:05:49,779 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2018-08-07 11:05:49,780 INFO L87 Difference]: Start difference. First operand 243030 states and 311632 transitions. Second operand 7 states. [2018-08-07 11:05:59,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:05:59,732 INFO L93 Difference]: Finished difference Result 524628 states and 693407 transitions. [2018-08-07 11:05:59,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-08-07 11:05:59,733 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 368 [2018-08-07 11:05:59,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:06:01,782 INFO L225 Difference]: With dead ends: 524628 [2018-08-07 11:06:01,782 INFO L226 Difference]: Without dead ends: 287524 [2018-08-07 11:06:02,142 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1483 GetRequests, 1460 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2018-08-07 11:06:02,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287524 states. [2018-08-07 11:06:09,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287524 to 281779. [2018-08-07 11:06:09,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281779 states. [2018-08-07 11:06:10,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281779 states to 281779 states and 363073 transitions. [2018-08-07 11:06:10,787 INFO L78 Accepts]: Start accepts. Automaton has 281779 states and 363073 transitions. Word has length 368 [2018-08-07 11:06:10,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:06:10,788 INFO L480 AbstractCegarLoop]: Abstraction has 281779 states and 363073 transitions. [2018-08-07 11:06:10,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-08-07 11:06:10,788 INFO L276 IsEmpty]: Start isEmpty. Operand 281779 states and 363073 transitions. [2018-08-07 11:06:11,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2018-08-07 11:06:11,061 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:06:11,061 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] [2018-08-07 11:06:11,061 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]=== [2018-08-07 11:06:11,062 INFO L82 PathProgramCache]: Analyzing trace with hash -129346682, now seen corresponding path program 1 times [2018-08-07 11:06:11,062 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:06:11,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:06:11,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:06:11,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:06:11,063 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:06:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:06:11,693 WARN L170 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-08-07 11:06:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 247 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:06:11,988 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:06:11,988 INFO L194 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 [2018-08-07 11:06:12,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:06:12,002 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:06:12,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:06:12,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:06:13,477 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-08-07 11:06:13,477 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:06:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 186 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 11:06:13,671 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 11:06:13,672 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-08-07 11:06:13,672 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 11:06:13,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 11:06:13,673 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 11:06:13,673 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-08-07 11:06:13,673 INFO L87 Difference]: Start difference. First operand 281779 states and 363073 transitions. Second operand 5 states. [2018-08-07 11:06:33,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:06:33,326 INFO L93 Difference]: Finished difference Result 701955 states and 951048 transitions. [2018-08-07 11:06:33,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-08-07 11:06:33,326 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 381 [2018-08-07 11:06:33,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:06:35,684 INFO L225 Difference]: With dead ends: 701955 [2018-08-07 11:06:35,684 INFO L226 Difference]: Without dead ends: 551507 [2018-08-07 11:06:36,007 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 768 GetRequests, 758 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-08-07 11:06:36,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551507 states. [2018-08-07 11:06:52,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551507 to 537082. [2018-08-07 11:06:52,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537082 states. [2018-08-07 11:06:56,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537082 states to 537082 states and 690138 transitions. [2018-08-07 11:06:56,123 INFO L78 Accepts]: Start accepts. Automaton has 537082 states and 690138 transitions. Word has length 381 [2018-08-07 11:06:56,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:06:56,124 INFO L480 AbstractCegarLoop]: Abstraction has 537082 states and 690138 transitions. [2018-08-07 11:06:56,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 11:06:56,124 INFO L276 IsEmpty]: Start isEmpty. Operand 537082 states and 690138 transitions. [2018-08-07 11:06:56,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2018-08-07 11:06:56,599 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:06:56,599 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] [2018-08-07 11:06:56,599 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]=== [2018-08-07 11:06:56,599 INFO L82 PathProgramCache]: Analyzing trace with hash -652357671, now seen corresponding path program 1 times [2018-08-07 11:06:56,600 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:06:56,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:06:56,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:06:56,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:06:56,600 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:06:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:06:57,912 WARN L170 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-08-07 11:06:58,028 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 290 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:06:58,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:06:58,028 INFO L194 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 [2018-08-07 11:06:58,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:06:58,041 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:06:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:06:59,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:06:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2018-08-07 11:06:59,819 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:07:00,113 WARN L170 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2018-08-07 11:07:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 192 proven. 92 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-08-07 11:07:00,526 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 11:07:00,527 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 15 [2018-08-07 11:07:00,527 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 11:07:00,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 11:07:00,528 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 11:07:00,528 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2018-08-07 11:07:00,528 INFO L87 Difference]: Start difference. First operand 537082 states and 690138 transitions. Second operand 5 states. Received shutdown request... [2018-08-07 11:07:13,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-08-07 11:07:13,304 WARN L549 AbstractCegarLoop]: Verification canceled [2018-08-07 11:07:13,310 WARN L202 ceAbstractionStarter]: Timeout [2018-08-07 11:07:13,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.08 11:07:13 BoogieIcfgContainer [2018-08-07 11:07:13,312 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-08-07 11:07:13,313 INFO L168 Benchmark]: Toolchain (without parser) took 213563.42 ms. Allocated memory was 1.5 GB in the beginning and 5.5 GB in the end (delta: 4.0 GB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -757.3 MB). Peak memory consumption was 4.6 GB. Max. memory is 7.1 GB. [2018-08-07 11:07:13,314 INFO L168 Benchmark]: CDTParser took 0.25 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. [2018-08-07 11:07:13,316 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1184.88 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. [2018-08-07 11:07:13,317 INFO L168 Benchmark]: Boogie Procedure Inliner took 164.18 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. [2018-08-07 11:07:13,319 INFO L168 Benchmark]: Boogie Preprocessor took 375.40 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 822.1 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -958.3 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. [2018-08-07 11:07:13,321 INFO L168 Benchmark]: RCFGBuilder took 4979.63 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 280.2 MB). Peak memory consumption was 280.2 MB. Max. memory is 7.1 GB. [2018-08-07 11:07:13,322 INFO L168 Benchmark]: TraceAbstraction took 206851.80 ms. Allocated memory was 2.4 GB in the beginning and 5.5 GB in the end (delta: 3.1 GB). Free memory was 2.0 GB in the beginning and 2.2 GB in the end (delta: -184.9 MB). Peak memory consumption was 4.3 GB. Max. memory is 7.1 GB. [2018-08-07 11:07:13,331 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 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 1184.88 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 164.18 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 375.40 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 822.1 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -958.3 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4979.63 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 280.2 MB). Peak memory consumption was 280.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 206851.80 ms. Allocated memory was 2.4 GB in the beginning and 5.5 GB in the end (delta: 3.1 GB). Free memory was 2.0 GB in the beginning and 2.2 GB in the end (delta: -184.9 MB). Peak memory consumption was 4.3 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 (1133572 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 206.7s OverallTime, 16 OverallIterations, 5 TraceHistogramMax, 120.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3417 SDtfs, 21210 SDslu, 4449 SDs, 0 SdLazy, 28354 SolverSat, 6139 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 45.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10543 GetRequests, 10293 SyntacticMatches, 31 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 11.5s 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: 52.4s AutomataMinimizationTime, 15 MinimizatonAttempts, 36323 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 2.1s SsaConstructionTime, 7.9s SatisfiabilityAnalysisTime, 19.1s 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-0-2018-08-07_11-07-13-347.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-0-2018-08-07_11-07-13-347.csv Completed graceful shutdown