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_label21_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 10:27:12,947 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 10:27:12,949 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 10:27:12,963 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 10:27:12,963 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 10:27:12,967 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 10:27:12,968 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 10:27:12,973 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 10:27:12,975 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 10:27:12,976 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 10:27:12,977 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 10:27:12,977 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 10:27:12,978 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 10:27:12,979 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 10:27:12,980 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 10:27:12,982 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 10:27:12,982 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 10:27:12,984 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 10:27:12,989 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 10:27:12,993 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 10:27:12,995 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 10:27:12,997 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 10:27:13,000 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 10:27:13,000 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 10:27:13,000 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 10:27:13,001 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 10:27:13,003 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 10:27:13,003 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 10:27:13,004 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 10:27:13,005 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 10:27:13,005 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 10:27:13,006 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 10:27:13,006 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 10:27:13,006 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 10:27:13,011 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 10:27:13,011 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 10:27:13,013 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-10 10:27:13,042 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 10:27:13,042 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 10:27:13,044 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 10:27:13,044 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 10:27:13,044 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 10:27:13,044 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 10:27:13,044 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 10:27:13,045 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 10:27:13,045 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 10:27:13,045 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 10:27:13,045 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 10:27:13,046 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 10:27:13,046 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 10:27:13,047 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 10:27:13,047 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 10:27:13,047 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 10:27:13,047 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 10:27:13,047 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 10:27:13,047 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 10:27:13,048 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 10:27:13,048 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 10:27:13,048 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 10:27:13,048 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 10:27:13,050 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 10:27:13,050 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 10:27:13,050 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 10:27:13,051 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 10:27:13,051 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 10:27:13,051 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 10:27:13,051 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 10:27:13,051 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 10:27:13,051 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 10:27:13,052 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 10:27:13,123 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 10:27:13,138 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 10:27:13,145 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 10:27:13,147 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 10:27:13,147 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 10:27:13,148 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label21_true-unreach-call.c [2018-09-10 10:27:13,508 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03acfa8ee/994d022f77a94ce5a83409e0ca379907/FLAG90c292a17 [2018-09-10 10:27:13,888 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 10:27:13,889 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label21_true-unreach-call.c [2018-09-10 10:27:13,915 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03acfa8ee/994d022f77a94ce5a83409e0ca379907/FLAG90c292a17 [2018-09-10 10:27:13,936 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03acfa8ee/994d022f77a94ce5a83409e0ca379907 [2018-09-10 10:27:13,948 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 10:27:13,951 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 10:27:13,952 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 10:27:13,952 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 10:27:13,960 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 10:27:13,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:27:13" (1/1) ... [2018-09-10 10:27:13,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40c5c827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:13, skipping insertion in model container [2018-09-10 10:27:13,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:27:13" (1/1) ... [2018-09-10 10:27:14,200 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 10:27:14,713 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:27:14,734 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 10:27:15,032 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:27:15,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:15 WrapperNode [2018-09-10 10:27:15,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 10:27:15,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 10:27:15,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 10:27:15,101 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 10:27:15,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:15" (1/1) ... [2018-09-10 10:27:15,164 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:15" (1/1) ... [2018-09-10 10:27:15,276 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 10:27:15,276 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 10:27:15,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 10:27:15,277 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 10:27:15,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:15" (1/1) ... [2018-09-10 10:27:15,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:15" (1/1) ... [2018-09-10 10:27:15,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:15" (1/1) ... [2018-09-10 10:27:15,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:15" (1/1) ... [2018-09-10 10:27:15,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:15" (1/1) ... [2018-09-10 10:27:15,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:15" (1/1) ... [2018-09-10 10:27:15,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:15" (1/1) ... [2018-09-10 10:27:15,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 10:27:15,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 10:27:15,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 10:27:15,617 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 10:27:15,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 10:27:15,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 10:27:15,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 10:27:15,688 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-09-10 10:27:15,689 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-09-10 10:27:15,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 10:27:15,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 10:27:15,690 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 10:27:15,690 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 10:27:20,304 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 10:27:20,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:27:20 BoogieIcfgContainer [2018-09-10 10:27:20,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 10:27:20,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 10:27:20,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 10:27:20,310 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 10:27:20,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 10:27:13" (1/3) ... [2018-09-10 10:27:20,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b0eb23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:27:20, skipping insertion in model container [2018-09-10 10:27:20,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:27:15" (2/3) ... [2018-09-10 10:27:20,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b0eb23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:27:20, skipping insertion in model container [2018-09-10 10:27:20,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:27:20" (3/3) ... [2018-09-10 10:27:20,315 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label21_true-unreach-call.c [2018-09-10 10:27:20,327 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 10:27:20,338 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 10:27:20,397 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 10:27:20,398 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 10:27:20,398 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 10:27:20,398 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 10:27:20,398 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 10:27:20,399 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 10:27:20,399 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 10:27:20,399 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 10:27:20,399 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 10:27:20,430 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-10 10:27:20,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-09-10 10:27:20,458 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:27:20,463 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:27:20,464 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:27:20,470 INFO L82 PathProgramCache]: Analyzing trace with hash 79824004, now seen corresponding path program 1 times [2018-09-10 10:27:20,474 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:27:20,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:20,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:20,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:20,537 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:27:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:21,526 WARN L175 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:27:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:21,746 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:27:21,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 10:27:21,747 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:27:21,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:27:21,770 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:27:21,771 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:27:21,774 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-09-10 10:27:24,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:27:24,170 INFO L93 Difference]: Finished difference Result 838 states and 1479 transitions. [2018-09-10 10:27:24,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:27:24,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 209 [2018-09-10 10:27:24,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:27:24,203 INFO L225 Difference]: With dead ends: 838 [2018-09-10 10:27:24,203 INFO L226 Difference]: Without dead ends: 524 [2018-09-10 10:27:24,210 INFO L604 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 [2018-09-10 10:27:24,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2018-09-10 10:27:24,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 522. [2018-09-10 10:27:24,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2018-09-10 10:27:24,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 890 transitions. [2018-09-10 10:27:24,322 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 890 transitions. Word has length 209 [2018-09-10 10:27:24,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:27:24,324 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 890 transitions. [2018-09-10 10:27:24,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:27:24,324 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 890 transitions. [2018-09-10 10:27:24,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-09-10 10:27:24,334 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:27:24,335 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:27:24,335 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:27:24,335 INFO L82 PathProgramCache]: Analyzing trace with hash 2047446013, now seen corresponding path program 1 times [2018-09-10 10:27:24,336 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:27:24,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:24,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:24,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:24,337 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:27:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:24,699 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:27:24,700 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 10:27:24,700 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:27:24,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:27:24,702 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:27:24,702 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 10:27:24,703 INFO L87 Difference]: Start difference. First operand 522 states and 890 transitions. Second operand 6 states. [2018-09-10 10:27:28,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:27:28,404 INFO L93 Difference]: Finished difference Result 1271 states and 2186 transitions. [2018-09-10 10:27:28,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 10:27:28,405 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 219 [2018-09-10 10:27:28,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:27:28,412 INFO L225 Difference]: With dead ends: 1271 [2018-09-10 10:27:28,413 INFO L226 Difference]: Without dead ends: 755 [2018-09-10 10:27:28,415 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-10 10:27:28,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2018-09-10 10:27:28,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 739. [2018-09-10 10:27:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 739 states. [2018-09-10 10:27:28,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1100 transitions. [2018-09-10 10:27:28,451 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1100 transitions. Word has length 219 [2018-09-10 10:27:28,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:27:28,451 INFO L480 AbstractCegarLoop]: Abstraction has 739 states and 1100 transitions. [2018-09-10 10:27:28,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:27:28,451 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1100 transitions. [2018-09-10 10:27:28,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-10 10:27:28,456 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:27:28,456 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:27:28,457 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:27:28,457 INFO L82 PathProgramCache]: Analyzing trace with hash 909218688, now seen corresponding path program 1 times [2018-09-10 10:27:28,457 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:27:28,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:28,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:28,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:28,459 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:27:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:28,815 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:27:28,815 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 10:27:28,815 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:27:28,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:27:28,816 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:27:28,816 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:27:28,817 INFO L87 Difference]: Start difference. First operand 739 states and 1100 transitions. Second operand 3 states. [2018-09-10 10:27:31,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:27:31,216 INFO L93 Difference]: Finished difference Result 2114 states and 3231 transitions. [2018-09-10 10:27:31,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:27:31,217 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 222 [2018-09-10 10:27:31,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:27:31,225 INFO L225 Difference]: With dead ends: 2114 [2018-09-10 10:27:31,226 INFO L226 Difference]: Without dead ends: 1381 [2018-09-10 10:27:31,229 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:27:31,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2018-09-10 10:27:31,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1376. [2018-09-10 10:27:31,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1376 states. [2018-09-10 10:27:31,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 1980 transitions. [2018-09-10 10:27:31,274 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 1980 transitions. Word has length 222 [2018-09-10 10:27:31,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:27:31,275 INFO L480 AbstractCegarLoop]: Abstraction has 1376 states and 1980 transitions. [2018-09-10 10:27:31,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:27:31,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 1980 transitions. [2018-09-10 10:27:31,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-10 10:27:31,283 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:27:31,283 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:27:31,284 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:27:31,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1412879537, now seen corresponding path program 1 times [2018-09-10 10:27:31,284 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:27:31,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:31,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:31,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:31,285 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:27:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:31,648 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:27:31,649 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 10:27:31,649 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:27:31,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:27:31,650 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:27:31,650 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:27:31,650 INFO L87 Difference]: Start difference. First operand 1376 states and 1980 transitions. Second operand 3 states. [2018-09-10 10:27:33,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:27:33,716 INFO L93 Difference]: Finished difference Result 4026 states and 5967 transitions. [2018-09-10 10:27:33,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:27:33,724 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 242 [2018-09-10 10:27:33,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:27:33,742 INFO L225 Difference]: With dead ends: 4026 [2018-09-10 10:27:33,743 INFO L226 Difference]: Without dead ends: 2656 [2018-09-10 10:27:33,750 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:27:33,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2018-09-10 10:27:33,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2641. [2018-09-10 10:27:33,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2641 states. [2018-09-10 10:27:33,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 3776 transitions. [2018-09-10 10:27:33,841 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 3776 transitions. Word has length 242 [2018-09-10 10:27:33,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:27:33,842 INFO L480 AbstractCegarLoop]: Abstraction has 2641 states and 3776 transitions. [2018-09-10 10:27:33,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:27:33,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 3776 transitions. [2018-09-10 10:27:33,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-09-10 10:27:33,858 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:27:33,859 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, 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] [2018-09-10 10:27:33,859 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:27:33,859 INFO L82 PathProgramCache]: Analyzing trace with hash 779273818, now seen corresponding path program 1 times [2018-09-10 10:27:33,860 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:27:33,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:33,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:33,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:33,861 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:27:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:34,254 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:27:34,254 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-10 10:27:34,254 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:27:34,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 10:27:34,255 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 10:27:34,255 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:27:34,255 INFO L87 Difference]: Start difference. First operand 2641 states and 3776 transitions. Second operand 7 states. [2018-09-10 10:27:39,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:27:39,303 INFO L93 Difference]: Finished difference Result 11521 states and 18986 transitions. [2018-09-10 10:27:39,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-10 10:27:39,303 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 287 [2018-09-10 10:27:39,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:27:39,387 INFO L225 Difference]: With dead ends: 11521 [2018-09-10 10:27:39,388 INFO L226 Difference]: Without dead ends: 8886 [2018-09-10 10:27:39,417 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2018-09-10 10:27:39,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8886 states. [2018-09-10 10:27:39,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8886 to 8362. [2018-09-10 10:27:39,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8362 states. [2018-09-10 10:27:39,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8362 states to 8362 states and 12395 transitions. [2018-09-10 10:27:39,890 INFO L78 Accepts]: Start accepts. Automaton has 8362 states and 12395 transitions. Word has length 287 [2018-09-10 10:27:39,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:27:39,891 INFO L480 AbstractCegarLoop]: Abstraction has 8362 states and 12395 transitions. [2018-09-10 10:27:39,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 10:27:39,891 INFO L276 IsEmpty]: Start isEmpty. Operand 8362 states and 12395 transitions. [2018-09-10 10:27:39,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-09-10 10:27:39,947 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:27:39,947 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:27:39,947 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:27:39,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1164292358, now seen corresponding path program 1 times [2018-09-10 10:27:39,948 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:27:39,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:39,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:39,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:39,952 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:27:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:40,538 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:27:40,539 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:27:40,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:40,548 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:27:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:40,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:27:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:41,268 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:27:41,448 WARN L175 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-10 10:27:41,549 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-10 10:27:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:41,896 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:27:41,896 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:27:41,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:41,927 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:27:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:42,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:27:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:42,588 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:27:42,749 WARN L175 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-10 10:27:42,998 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:43,001 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:27:43,001 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-10 10:27:43,001 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:27:43,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:27:43,003 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:27:43,003 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 10:27:43,005 INFO L87 Difference]: Start difference. First operand 8362 states and 12395 transitions. Second operand 9 states. [2018-09-10 10:27:46,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:27:46,784 INFO L93 Difference]: Finished difference Result 23671 states and 36363 transitions. [2018-09-10 10:27:46,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 10:27:46,792 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 302 [2018-09-10 10:27:46,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:27:46,885 INFO L225 Difference]: With dead ends: 23671 [2018-09-10 10:27:46,885 INFO L226 Difference]: Without dead ends: 15315 [2018-09-10 10:27:46,954 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1216 GetRequests, 1201 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2018-09-10 10:27:46,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15315 states. [2018-09-10 10:27:47,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15315 to 15017. [2018-09-10 10:27:47,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15017 states. [2018-09-10 10:27:47,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15017 states to 15017 states and 21185 transitions. [2018-09-10 10:27:47,460 INFO L78 Accepts]: Start accepts. Automaton has 15017 states and 21185 transitions. Word has length 302 [2018-09-10 10:27:47,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:27:47,460 INFO L480 AbstractCegarLoop]: Abstraction has 15017 states and 21185 transitions. [2018-09-10 10:27:47,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:27:47,460 INFO L276 IsEmpty]: Start isEmpty. Operand 15017 states and 21185 transitions. [2018-09-10 10:27:47,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2018-09-10 10:27:47,541 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:27:47,542 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:27:47,542 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:27:47,542 INFO L82 PathProgramCache]: Analyzing trace with hash -792393365, now seen corresponding path program 1 times [2018-09-10 10:27:47,542 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:27:47,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:47,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:47,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:47,544 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:27:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:48,179 WARN L175 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-10 10:27:48,409 WARN L175 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-10 10:27:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:48,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:27:48,705 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:27:48,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:48,720 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:27:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:48,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:27:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-10 10:27:49,055 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:27:49,194 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-10 10:27:49,216 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 10:27:49,216 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-09-10 10:27:49,217 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:27:49,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:27:49,217 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:27:49,217 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-10 10:27:49,218 INFO L87 Difference]: Start difference. First operand 15017 states and 21185 transitions. Second operand 3 states. [2018-09-10 10:27:51,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:27:51,206 INFO L93 Difference]: Finished difference Result 42730 states and 60791 transitions. [2018-09-10 10:27:51,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:27:51,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 309 [2018-09-10 10:27:51,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:27:51,326 INFO L225 Difference]: With dead ends: 42730 [2018-09-10 10:27:51,327 INFO L226 Difference]: Without dead ends: 27719 [2018-09-10 10:27:51,365 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 616 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-10 10:27:51,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27719 states. [2018-09-10 10:27:52,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27719 to 27470. [2018-09-10 10:27:52,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27470 states. [2018-09-10 10:27:52,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27470 states to 27470 states and 37384 transitions. [2018-09-10 10:27:52,076 INFO L78 Accepts]: Start accepts. Automaton has 27470 states and 37384 transitions. Word has length 309 [2018-09-10 10:27:52,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:27:52,077 INFO L480 AbstractCegarLoop]: Abstraction has 27470 states and 37384 transitions. [2018-09-10 10:27:52,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:27:52,077 INFO L276 IsEmpty]: Start isEmpty. Operand 27470 states and 37384 transitions. [2018-09-10 10:27:52,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2018-09-10 10:27:52,152 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:27:52,152 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2018-09-10 10:27:52,152 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:27:52,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1548274009, now seen corresponding path program 1 times [2018-09-10 10:27:52,153 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:27:52,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:52,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:52,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:52,154 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:27:52,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:52,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:27:52,706 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:27:52,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:52,721 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:27:52,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:52,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:27:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:53,216 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:27:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:53,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:27:53,998 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:27:54,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:54,032 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:27:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:54,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:27:55,082 WARN L175 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 6 [2018-09-10 10:27:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 107 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:55,313 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:27:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:56,037 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:27:56,038 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 5] total 9 [2018-09-10 10:27:56,038 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:27:56,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:27:56,040 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:27:56,040 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-09-10 10:27:56,040 INFO L87 Difference]: Start difference. First operand 27470 states and 37384 transitions. Second operand 6 states. [2018-09-10 10:27:59,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:27:59,665 INFO L93 Difference]: Finished difference Result 62952 states and 89631 transitions. [2018-09-10 10:27:59,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 10:27:59,665 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 321 [2018-09-10 10:27:59,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:27:59,821 INFO L225 Difference]: With dead ends: 62952 [2018-09-10 10:27:59,822 INFO L226 Difference]: Without dead ends: 35493 [2018-09-10 10:27:59,893 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1294 GetRequests, 1278 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-09-10 10:27:59,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35493 states. [2018-09-10 10:28:00,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35493 to 34535. [2018-09-10 10:28:00,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34535 states. [2018-09-10 10:28:00,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34535 states to 34535 states and 44614 transitions. [2018-09-10 10:28:00,654 INFO L78 Accepts]: Start accepts. Automaton has 34535 states and 44614 transitions. Word has length 321 [2018-09-10 10:28:00,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:28:00,654 INFO L480 AbstractCegarLoop]: Abstraction has 34535 states and 44614 transitions. [2018-09-10 10:28:00,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:28:00,654 INFO L276 IsEmpty]: Start isEmpty. Operand 34535 states and 44614 transitions. [2018-09-10 10:28:00,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-09-10 10:28:00,723 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:28:00,724 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 10:28:00,724 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:28:00,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1908447066, now seen corresponding path program 1 times [2018-09-10 10:28:00,725 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:28:00,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:00,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:00,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:00,726 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:28:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:28:01,114 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:28:01,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 10:28:01,114 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:28:01,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:28:01,115 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:28:01,115 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:28:01,115 INFO L87 Difference]: Start difference. First operand 34535 states and 44614 transitions. Second operand 3 states. [2018-09-10 10:28:02,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:28:02,955 INFO L93 Difference]: Finished difference Result 60330 states and 77893 transitions. [2018-09-10 10:28:02,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:28:02,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 340 [2018-09-10 10:28:02,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:28:03,046 INFO L225 Difference]: With dead ends: 60330 [2018-09-10 10:28:03,046 INFO L226 Difference]: Without dead ends: 30868 [2018-09-10 10:28:03,097 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:28:03,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30868 states. [2018-09-10 10:28:03,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30868 to 30435. [2018-09-10 10:28:03,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30435 states. [2018-09-10 10:28:03,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30435 states to 30435 states and 37828 transitions. [2018-09-10 10:28:03,670 INFO L78 Accepts]: Start accepts. Automaton has 30435 states and 37828 transitions. Word has length 340 [2018-09-10 10:28:03,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:28:03,671 INFO L480 AbstractCegarLoop]: Abstraction has 30435 states and 37828 transitions. [2018-09-10 10:28:03,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:28:03,671 INFO L276 IsEmpty]: Start isEmpty. Operand 30435 states and 37828 transitions. [2018-09-10 10:28:03,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-09-10 10:28:03,726 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:28:03,727 INFO L376 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:28:03,727 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:28:03,727 INFO L82 PathProgramCache]: Analyzing trace with hash 691921356, now seen corresponding path program 1 times [2018-09-10 10:28:03,727 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:28:03,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:03,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:03,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:03,729 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:28:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:04,389 WARN L175 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-10 10:28:04,600 WARN L175 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-10 10:28:04,904 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 149 proven. 34 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-10 10:28:04,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:28:04,904 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:28:04,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:04,920 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:28:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:05,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:28:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 168 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-10 10:28:05,329 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:28:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 149 proven. 34 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-10 10:28:05,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:28:05,602 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:28:05,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:05,618 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:28:06,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:06,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:28:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 159 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:28:06,919 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:28:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 137 proven. 47 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-10 10:28:07,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:28:07,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6, 10, 8] total 26 [2018-09-10 10:28:07,374 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:28:07,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-10 10:28:07,376 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-10 10:28:07,376 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2018-09-10 10:28:07,376 INFO L87 Difference]: Start difference. First operand 30435 states and 37828 transitions. Second operand 11 states. [2018-09-10 10:28:11,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:28:11,192 INFO L93 Difference]: Finished difference Result 60735 states and 78341 transitions. [2018-09-10 10:28:11,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 10:28:11,193 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 344 [2018-09-10 10:28:11,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:28:11,302 INFO L225 Difference]: With dead ends: 60735 [2018-09-10 10:28:11,302 INFO L226 Difference]: Without dead ends: 30692 [2018-09-10 10:28:11,361 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1395 GetRequests, 1364 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2018-09-10 10:28:11,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30692 states. [2018-09-10 10:28:11,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30692 to 30041. [2018-09-10 10:28:11,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30041 states. [2018-09-10 10:28:11,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30041 states to 30041 states and 36031 transitions. [2018-09-10 10:28:11,977 INFO L78 Accepts]: Start accepts. Automaton has 30041 states and 36031 transitions. Word has length 344 [2018-09-10 10:28:11,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:28:11,977 INFO L480 AbstractCegarLoop]: Abstraction has 30041 states and 36031 transitions. [2018-09-10 10:28:11,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-10 10:28:11,977 INFO L276 IsEmpty]: Start isEmpty. Operand 30041 states and 36031 transitions. [2018-09-10 10:28:12,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-09-10 10:28:12,022 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:28:12,022 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:28:12,022 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:28:12,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1043224730, now seen corresponding path program 1 times [2018-09-10 10:28:12,023 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:28:12,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:12,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:12,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:12,024 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:28:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 178 proven. 38 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-09-10 10:28:12,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:28:12,506 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:28:12,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:12,513 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:28:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:12,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:28:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-09-10 10:28:13,357 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:28:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 142 proven. 56 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-09-10 10:28:13,710 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:28:13,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2018-09-10 10:28:13,711 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:28:13,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:28:13,712 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:28:13,712 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-09-10 10:28:13,712 INFO L87 Difference]: Start difference. First operand 30041 states and 36031 transitions. Second operand 5 states. [2018-09-10 10:28:16,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:28:16,245 INFO L93 Difference]: Finished difference Result 66720 states and 80305 transitions. [2018-09-10 10:28:16,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 10:28:16,245 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 360 [2018-09-10 10:28:16,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:28:16,347 INFO L225 Difference]: With dead ends: 66720 [2018-09-10 10:28:16,347 INFO L226 Difference]: Without dead ends: 44737 [2018-09-10 10:28:16,389 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 716 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2018-09-10 10:28:16,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44737 states. [2018-09-10 10:28:17,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44737 to 44260. [2018-09-10 10:28:17,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44260 states. [2018-09-10 10:28:17,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44260 states to 44260 states and 52749 transitions. [2018-09-10 10:28:17,201 INFO L78 Accepts]: Start accepts. Automaton has 44260 states and 52749 transitions. Word has length 360 [2018-09-10 10:28:17,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:28:17,201 INFO L480 AbstractCegarLoop]: Abstraction has 44260 states and 52749 transitions. [2018-09-10 10:28:17,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:28:17,202 INFO L276 IsEmpty]: Start isEmpty. Operand 44260 states and 52749 transitions. [2018-09-10 10:28:17,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2018-09-10 10:28:17,256 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:28:17,256 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:28:17,256 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:28:17,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1191226775, now seen corresponding path program 1 times [2018-09-10 10:28:17,257 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:28:17,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:17,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:17,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:17,258 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:28:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 188 proven. 94 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-10 10:28:17,752 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:28:17,752 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:28:17,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:17,760 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:28:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:18,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:28:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-09-10 10:28:18,554 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:28:18,734 WARN L175 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2018-09-10 10:28:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 166 proven. 77 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-09-10 10:28:19,284 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:28:19,284 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:28:19,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:19,300 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:28:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:20,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:28:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 128 proven. 2 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-09-10 10:28:20,297 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:28:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 166 proven. 77 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-09-10 10:28:20,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:28:20,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8, 6, 8] total 30 [2018-09-10 10:28:20,761 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:28:20,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-10 10:28:20,762 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-10 10:28:20,762 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2018-09-10 10:28:20,762 INFO L87 Difference]: Start difference. First operand 44260 states and 52749 transitions. Second operand 16 states. [2018-09-10 10:28:28,831 WARN L175 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2018-09-10 10:28:32,557 WARN L175 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-09-10 10:28:34,334 WARN L175 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2018-09-10 10:28:38,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:28:38,251 INFO L93 Difference]: Finished difference Result 139062 states and 179557 transitions. [2018-09-10 10:28:38,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-10 10:28:38,252 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 372 [2018-09-10 10:28:38,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:28:38,555 INFO L225 Difference]: With dead ends: 139062 [2018-09-10 10:28:38,555 INFO L226 Difference]: Without dead ends: 99090 [2018-09-10 10:28:38,647 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1752 GetRequests, 1595 SyntacticMatches, 2 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9234 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=3547, Invalid=20945, Unknown=0, NotChecked=0, Total=24492 [2018-09-10 10:28:38,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99090 states. [2018-09-10 10:28:40,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99090 to 95193. [2018-09-10 10:28:40,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95193 states. [2018-09-10 10:28:41,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95193 states to 95193 states and 112168 transitions. [2018-09-10 10:28:41,137 INFO L78 Accepts]: Start accepts. Automaton has 95193 states and 112168 transitions. Word has length 372 [2018-09-10 10:28:41,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:28:41,137 INFO L480 AbstractCegarLoop]: Abstraction has 95193 states and 112168 transitions. [2018-09-10 10:28:41,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-10 10:28:41,137 INFO L276 IsEmpty]: Start isEmpty. Operand 95193 states and 112168 transitions. [2018-09-10 10:28:41,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2018-09-10 10:28:41,241 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:28:41,241 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:28:41,241 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:28:41,242 INFO L82 PathProgramCache]: Analyzing trace with hash -497271089, now seen corresponding path program 1 times [2018-09-10 10:28:41,242 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:28:41,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:41,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:41,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:41,243 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:28:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:41,870 WARN L175 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-10 10:28:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 191 proven. 160 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:28:42,660 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:28:42,661 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:28:42,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:42,669 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:28:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:42,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:28:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-09-10 10:28:43,168 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:28:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 185 proven. 102 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-09-10 10:28:43,461 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:28:43,462 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 15 [2018-09-10 10:28:43,462 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:28:43,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:28:43,462 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:28:43,463 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-09-10 10:28:43,463 INFO L87 Difference]: Start difference. First operand 95193 states and 112168 transitions. Second operand 5 states. [2018-09-10 10:28:46,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:28:46,545 INFO L93 Difference]: Finished difference Result 174416 states and 206934 transitions. [2018-09-10 10:28:46,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 10:28:46,546 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 403 [2018-09-10 10:28:46,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:28:46,708 INFO L225 Difference]: With dead ends: 174416 [2018-09-10 10:28:46,708 INFO L226 Difference]: Without dead ends: 82103 [2018-09-10 10:28:47,593 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 801 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2018-09-10 10:28:47,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82103 states. [2018-09-10 10:28:48,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82103 to 80593. [2018-09-10 10:28:48,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80593 states. [2018-09-10 10:28:48,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80593 states to 80593 states and 92271 transitions. [2018-09-10 10:28:48,966 INFO L78 Accepts]: Start accepts. Automaton has 80593 states and 92271 transitions. Word has length 403 [2018-09-10 10:28:48,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:28:48,966 INFO L480 AbstractCegarLoop]: Abstraction has 80593 states and 92271 transitions. [2018-09-10 10:28:48,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:28:48,966 INFO L276 IsEmpty]: Start isEmpty. Operand 80593 states and 92271 transitions. [2018-09-10 10:28:49,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2018-09-10 10:28:49,041 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:28:49,041 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:28:49,042 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:28:49,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1296594471, now seen corresponding path program 1 times [2018-09-10 10:28:49,042 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:28:49,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:49,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:49,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:49,043 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:28:49,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:49,740 WARN L175 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-10 10:28:49,915 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 259 proven. 58 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-09-10 10:28:49,915 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:28:49,915 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:28:49,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:49,923 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:28:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:50,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:28:50,428 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 248 proven. 2 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2018-09-10 10:28:50,429 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:28:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 205 proven. 169 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-10 10:28:50,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:28:50,855 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:28:50,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:50,872 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:28:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:51,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:28:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-09-10 10:28:51,868 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:28:52,908 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 197 proven. 117 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-09-10 10:28:52,910 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-09-10 10:28:52,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 6, 5] total 18 [2018-09-10 10:28:52,911 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:28:52,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:28:52,911 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:28:52,912 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2018-09-10 10:28:52,912 INFO L87 Difference]: Start difference. First operand 80593 states and 92271 transitions. Second operand 5 states. [2018-09-10 10:28:55,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:28:55,355 INFO L93 Difference]: Finished difference Result 157128 states and 179814 transitions. [2018-09-10 10:28:55,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 10:28:55,356 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 415 [2018-09-10 10:28:55,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:28:55,508 INFO L225 Difference]: With dead ends: 157128 [2018-09-10 10:28:55,508 INFO L226 Difference]: Without dead ends: 82215 [2018-09-10 10:28:55,584 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1665 GetRequests, 1645 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2018-09-10 10:28:55,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82215 states. [2018-09-10 10:28:56,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82215 to 82165. [2018-09-10 10:28:56,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82165 states. [2018-09-10 10:28:56,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82165 states to 82165 states and 93911 transitions. [2018-09-10 10:28:56,711 INFO L78 Accepts]: Start accepts. Automaton has 82165 states and 93911 transitions. Word has length 415 [2018-09-10 10:28:56,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:28:56,711 INFO L480 AbstractCegarLoop]: Abstraction has 82165 states and 93911 transitions. [2018-09-10 10:28:56,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:28:56,711 INFO L276 IsEmpty]: Start isEmpty. Operand 82165 states and 93911 transitions. [2018-09-10 10:28:56,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2018-09-10 10:28:56,771 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:28:56,771 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:28:56,772 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:28:56,772 INFO L82 PathProgramCache]: Analyzing trace with hash -401037000, now seen corresponding path program 1 times [2018-09-10 10:28:56,772 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:28:56,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:56,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:56,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:56,773 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:28:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 246 proven. 123 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-09-10 10:28:57,923 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:28:57,923 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:28:57,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:57,932 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:28:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:58,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:28:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 273 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-09-10 10:28:58,487 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:28:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 246 proven. 123 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-09-10 10:28:59,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:28:59,277 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:28:59,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:59,295 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:00,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 273 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-09-10 10:29:00,375 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 231 proven. 168 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-09-10 10:29:00,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:29:00,862 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 8, 8] total 21 [2018-09-10 10:29:00,862 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:29:00,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 10:29:00,863 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 10:29:00,864 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2018-09-10 10:29:00,864 INFO L87 Difference]: Start difference. First operand 82165 states and 93911 transitions. Second operand 7 states. [2018-09-10 10:29:05,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:05,837 INFO L93 Difference]: Finished difference Result 163920 states and 193126 transitions. [2018-09-10 10:29:05,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-10 10:29:05,838 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 437 [2018-09-10 10:29:05,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:06,131 INFO L225 Difference]: With dead ends: 163920 [2018-09-10 10:29:06,131 INFO L226 Difference]: Without dead ends: 89005 [2018-09-10 10:29:06,255 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1764 GetRequests, 1738 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2018-09-10 10:29:06,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89005 states. [2018-09-10 10:29:07,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89005 to 83929. [2018-09-10 10:29:07,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83929 states. [2018-09-10 10:29:07,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83929 states to 83929 states and 95738 transitions. [2018-09-10 10:29:07,892 INFO L78 Accepts]: Start accepts. Automaton has 83929 states and 95738 transitions. Word has length 437 [2018-09-10 10:29:07,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:07,892 INFO L480 AbstractCegarLoop]: Abstraction has 83929 states and 95738 transitions. [2018-09-10 10:29:07,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 10:29:07,893 INFO L276 IsEmpty]: Start isEmpty. Operand 83929 states and 95738 transitions. [2018-09-10 10:29:07,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2018-09-10 10:29:07,989 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:07,989 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2018-09-10 10:29:07,989 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:29:07,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1933412258, now seen corresponding path program 1 times [2018-09-10 10:29:07,990 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:07,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:07,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:07,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:07,991 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:08,594 WARN L175 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-10 10:29:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 248 proven. 44 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2018-09-10 10:29:09,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:09,266 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:29:09,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:09,274 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:09,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 336 proven. 6 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-09-10 10:29:10,147 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:10,321 WARN L175 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-10 10:29:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 336 proven. 6 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-09-10 10:29:10,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:10,742 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 18 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 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:29:10,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:10,760 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:11,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 271 proven. 85 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2018-09-10 10:29:11,789 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:12,008 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 336 proven. 6 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-09-10 10:29:12,011 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:29:12,011 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 6, 5] total 12 [2018-09-10 10:29:12,011 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:29:12,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:29:12,012 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:29:12,012 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-09-10 10:29:12,012 INFO L87 Difference]: Start difference. First operand 83929 states and 95738 transitions. Second operand 9 states. [2018-09-10 10:29:26,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:26,672 INFO L93 Difference]: Finished difference Result 324101 states and 391996 transitions. [2018-09-10 10:29:26,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-10 10:29:26,672 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 442 [2018-09-10 10:29:26,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:27,519 INFO L225 Difference]: With dead ends: 324101 [2018-09-10 10:29:27,519 INFO L226 Difference]: Without dead ends: 245203 [2018-09-10 10:29:27,699 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1836 GetRequests, 1792 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=385, Invalid=1595, Unknown=0, NotChecked=0, Total=1980 [2018-09-10 10:29:27,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245203 states. [2018-09-10 10:29:32,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245203 to 233722. [2018-09-10 10:29:32,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233722 states. [2018-09-10 10:29:32,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233722 states to 233722 states and 265130 transitions. [2018-09-10 10:29:32,563 INFO L78 Accepts]: Start accepts. Automaton has 233722 states and 265130 transitions. Word has length 442 [2018-09-10 10:29:32,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:32,564 INFO L480 AbstractCegarLoop]: Abstraction has 233722 states and 265130 transitions. [2018-09-10 10:29:32,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:29:32,564 INFO L276 IsEmpty]: Start isEmpty. Operand 233722 states and 265130 transitions. [2018-09-10 10:29:32,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2018-09-10 10:29:32,746 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:32,746 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:29:32,747 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:29:32,747 INFO L82 PathProgramCache]: Analyzing trace with hash 335770293, now seen corresponding path program 1 times [2018-09-10 10:29:32,747 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:32,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:32,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:32,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:32,748 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 254 proven. 126 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2018-09-10 10:29:33,872 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:33,872 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:29:33,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:33,879 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:34,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:34,448 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 291 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-09-10 10:29:34,448 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 239 proven. 186 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2018-09-10 10:29:34,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:34,827 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 20 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 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:29:34,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:34,843 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:35,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:35,835 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 291 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-09-10 10:29:35,836 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 239 proven. 186 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2018-09-10 10:29:36,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:29:36,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8, 8, 8] total 16 [2018-09-10 10:29:36,237 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:29:36,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-10 10:29:36,238 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-10 10:29:36,238 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-09-10 10:29:36,238 INFO L87 Difference]: Start difference. First operand 233722 states and 265130 transitions. Second operand 12 states. [2018-09-10 10:30:06,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:30:06,504 INFO L93 Difference]: Finished difference Result 699200 states and 855621 transitions. [2018-09-10 10:30:06,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-10 10:30:06,504 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 443 [2018-09-10 10:30:06,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:30:07,874 INFO L225 Difference]: With dead ends: 699200 [2018-09-10 10:30:07,874 INFO L226 Difference]: Without dead ends: 393921 [2018-09-10 10:30:08,396 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1929 GetRequests, 1837 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3203 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1374, Invalid=7368, Unknown=0, NotChecked=0, Total=8742 [2018-09-10 10:30:08,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393921 states. [2018-09-10 10:30:15,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393921 to 345108. [2018-09-10 10:30:15,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345108 states. [2018-09-10 10:30:15,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345108 states to 345108 states and 374397 transitions. [2018-09-10 10:30:15,677 INFO L78 Accepts]: Start accepts. Automaton has 345108 states and 374397 transitions. Word has length 443 [2018-09-10 10:30:15,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:30:15,677 INFO L480 AbstractCegarLoop]: Abstraction has 345108 states and 374397 transitions. [2018-09-10 10:30:15,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-10 10:30:15,677 INFO L276 IsEmpty]: Start isEmpty. Operand 345108 states and 374397 transitions. [2018-09-10 10:30:17,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2018-09-10 10:30:17,011 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:30:17,011 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:30:17,011 INFO L423 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:30:17,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1571861991, now seen corresponding path program 1 times [2018-09-10 10:30:17,012 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:30:17,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:17,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:17,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:17,013 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:30:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 375 proven. 66 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-09-10 10:30:17,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:30:17,435 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:30:17,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:17,444 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:30:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:17,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:30:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 582 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2018-09-10 10:30:18,029 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:30:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 465 proven. 90 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2018-09-10 10:30:18,434 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:30:18,435 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 22 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 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:30:18,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:18,451 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:30:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:19,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:30:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 582 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2018-09-10 10:30:20,177 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:30:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 465 proven. 90 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2018-09-10 10:30:20,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:30:20,446 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-10 10:30:20,446 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:30:20,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:30:20,448 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:30:20,448 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-10 10:30:20,448 INFO L87 Difference]: Start difference. First operand 345108 states and 374397 transitions. Second operand 9 states. Received shutdown request... [2018-09-10 10:30:54,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-10 10:30:54,895 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 10:30:54,901 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 10:30:54,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 10:30:54 BoogieIcfgContainer [2018-09-10 10:30:54,901 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 10:30:54,902 INFO L168 Benchmark]: Toolchain (without parser) took 220954.02 ms. Allocated memory was 1.5 GB in the beginning and 6.3 GB in the end (delta: 4.7 GB). Free memory was 1.4 GB in the beginning and 4.6 GB in the end (delta: -3.1 GB). Peak memory consumption was 4.2 GB. Max. memory is 7.1 GB. [2018-09-10 10:30:54,903 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-10 10:30:54,904 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1147.83 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: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 7.1 GB. [2018-09-10 10:30:54,904 INFO L168 Benchmark]: Boogie Procedure Inliner took 175.37 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-10 10:30:54,905 INFO L168 Benchmark]: Boogie Preprocessor took 339.70 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 815.3 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -951.0 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2018-09-10 10:30:54,907 INFO L168 Benchmark]: RCFGBuilder took 4688.70 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: 283.8 MB). Peak memory consumption was 283.8 MB. Max. memory is 7.1 GB. [2018-09-10 10:30:54,908 INFO L168 Benchmark]: TraceAbstraction took 214595.31 ms. Allocated memory was 2.4 GB in the beginning and 6.3 GB in the end (delta: 3.9 GB). Free memory was 2.0 GB in the beginning and 4.6 GB in the end (delta: -2.6 GB). Peak memory consumption was 3.9 GB. Max. memory is 7.1 GB. [2018-09-10 10:30:54,912 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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 1147.83 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: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 175.37 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 339.70 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 815.3 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -951.0 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4688.70 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: 283.8 MB). Peak memory consumption was 283.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 214595.31 ms. Allocated memory was 2.4 GB in the beginning and 6.3 GB in the end (delta: 3.9 GB). Free memory was 2.0 GB in the beginning and 4.6 GB in the end (delta: -2.6 GB). Peak memory consumption was 3.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1641]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1641). Cancelled while BasicCegarLoop was constructing difference of abstraction (345108states) and FLOYD_HOARE automaton (currently 36 states, 9 states before enhancement), while ReachableStatesComputation was computing reachable states (2029399 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 214.5s OverallTime, 18 OverallIterations, 6 TraceHistogramMax, 146.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5471 SDtfs, 35939 SDslu, 9843 SDs, 0 SdLazy, 48100 SolverSat, 9577 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 68.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17152 GetRequests, 16643 SyntacticMatches, 26 SemanticMatches, 483 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14013 ImplicationChecksByTransitivity, 19.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=345108occurred in iteration=17, 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: 23.4s AutomataMinimizationTime, 17 MinimizatonAttempts, 74455 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.7s SsaConstructionTime, 9.9s SatisfiabilityAnalysisTime, 25.7s InterpolantComputationTime, 14415 NumberOfCodeBlocks, 14415 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 22595 ConstructedInterpolants, 0 QuantifiedInterpolants, 23328619 SizeOfPredicates, 146 NumberOfNonLiveVariables, 30201 ConjunctsInSsa, 348 ConjunctsInUnsatCore, 60 InterpolantComputations, 11 PerfectInterpolantSequences, 16839/19327 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_label21_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_10-30-54-927.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label21_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_10-30-54-927.csv Completed graceful shutdown