java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label01_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:47:46,166 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:47:46,168 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:47:46,181 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:47:46,181 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:47:46,182 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:47:46,184 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:47:46,185 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:47:46,187 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:47:46,188 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:47:46,189 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:47:46,189 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:47:46,190 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:47:46,191 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:47:46,192 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:47:46,193 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:47:46,194 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:47:46,196 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:47:46,198 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:47:46,199 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:47:46,200 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:47:46,204 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:47:46,208 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:47:46,209 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:47:46,209 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:47:46,210 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:47:46,213 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:47:46,214 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:47:46,214 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:47:46,218 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:47:46,218 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:47:46,220 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 12:47:46,222 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:47:46,222 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:47:46,223 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:47:46,224 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:47:46,225 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-07-24 12:47:46,249 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:47:46,250 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:47:46,251 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:47:46,251 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:47:46,252 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:47:46,252 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:47:46,252 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:47:46,252 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:47:46,252 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:47:46,253 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:47:46,253 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:47:46,254 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:47:46,254 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:47:46,254 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:47:46,255 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:47:46,255 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:47:46,255 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:47:46,255 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:47:46,255 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:47:46,256 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:47:46,256 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:47:46,256 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:47:46,258 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:47:46,258 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:47:46,258 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:47:46,259 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:47:46,259 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:47:46,259 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:47:46,259 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:47:46,259 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:47:46,260 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:47:46,260 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:47:46,260 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:47:46,337 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:47:46,354 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:47:46,357 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:47:46,359 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:47:46,359 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:47:46,360 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label01_true-unreach-call.c [2018-07-24 12:47:46,693 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45f8b71e7/5e3580f83b904bd5ba54eb29662e8981/FLAG9a0c0cb42 [2018-07-24 12:47:47,005 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:47:47,006 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label01_true-unreach-call.c [2018-07-24 12:47:47,032 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45f8b71e7/5e3580f83b904bd5ba54eb29662e8981/FLAG9a0c0cb42 [2018-07-24 12:47:47,054 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45f8b71e7/5e3580f83b904bd5ba54eb29662e8981 [2018-07-24 12:47:47,066 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:47:47,068 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:47:47,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:47:47,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:47:47,075 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:47:47,076 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:47:47" (1/1) ... [2018-07-24 12:47:47,079 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@658546c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:47, skipping insertion in model container [2018-07-24 12:47:47,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:47:47" (1/1) ... [2018-07-24 12:47:47,342 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:47:47,874 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:47:47,893 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:47:48,189 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:47:48,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:48 WrapperNode [2018-07-24 12:47:48,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:47:48,268 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:47:48,268 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:47:48,268 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:47:48,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:48" (1/1) ... [2018-07-24 12:47:48,327 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:48" (1/1) ... [2018-07-24 12:47:48,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:47:48,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:47:48,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:47:48,419 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:47:48,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:48" (1/1) ... [2018-07-24 12:47:48,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:48" (1/1) ... [2018-07-24 12:47:48,688 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:48" (1/1) ... [2018-07-24 12:47:48,688 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:48" (1/1) ... [2018-07-24 12:47:48,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:48" (1/1) ... [2018-07-24 12:47:48,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:48" (1/1) ... [2018-07-24 12:47:48,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:48" (1/1) ... [2018-07-24 12:47:48,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:47:48,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:47:48,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:47:48,768 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:47:48,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:47:48,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:47:48,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:47:48,845 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 [2018-07-24 12:47:48,845 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 [2018-07-24 12:47:48,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:47:48,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:47:48,846 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:47:48,846 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:47:53,927 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:47:53,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:47:53 BoogieIcfgContainer [2018-07-24 12:47:53,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:47:53,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:47:53,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:47:53,938 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:47:53,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:47:47" (1/3) ... [2018-07-24 12:47:53,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96fdfc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:47:53, skipping insertion in model container [2018-07-24 12:47:53,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:48" (2/3) ... [2018-07-24 12:47:53,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96fdfc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:47:53, skipping insertion in model container [2018-07-24 12:47:53,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:47:53" (3/3) ... [2018-07-24 12:47:53,942 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label01_true-unreach-call.c [2018-07-24 12:47:53,950 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:47:53,959 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:47:54,011 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:47:54,012 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:47:54,012 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:47:54,012 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:47:54,013 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:47:54,013 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:47:54,013 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:47:54,013 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:47:54,013 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:47:54,047 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-07-24 12:47:54,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-07-24 12:47:54,069 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:47:54,071 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:47:54,072 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:47:54,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1178454204, now seen corresponding path program 1 times [2018-07-24 12:47:54,080 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:47:54,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:47:54,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:47:54,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:47:54,131 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:47:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:47:54,973 WARN L169 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:47:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:47:55,181 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:47:55,182 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:47:55,182 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:47:55,189 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:47:55,206 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:47:55,207 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:47:55,210 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-07-24 12:47:57,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:47:57,503 INFO L93 Difference]: Finished difference Result 844 states and 1489 transitions. [2018-07-24 12:47:57,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:47:57,505 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 193 [2018-07-24 12:47:57,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:47:57,528 INFO L225 Difference]: With dead ends: 844 [2018-07-24 12:47:57,528 INFO L226 Difference]: Without dead ends: 530 [2018-07-24 12:47:57,535 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:47:57,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2018-07-24 12:47:57,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 525. [2018-07-24 12:47:57,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2018-07-24 12:47:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 865 transitions. [2018-07-24 12:47:57,631 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 865 transitions. Word has length 193 [2018-07-24 12:47:57,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:47:57,632 INFO L471 AbstractCegarLoop]: Abstraction has 525 states and 865 transitions. [2018-07-24 12:47:57,632 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:47:57,633 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 865 transitions. [2018-07-24 12:47:57,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-07-24 12:47:57,642 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:47:57,643 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:47:57,643 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:47:57,644 INFO L82 PathProgramCache]: Analyzing trace with hash 851918400, now seen corresponding path program 1 times [2018-07-24 12:47:57,644 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:47:57,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:47:57,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:47:57,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:47:57,646 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:47:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:47:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:47:58,168 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:47:58,168 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:47:58,169 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:47:58,171 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:47:58,171 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:47:58,171 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:47:58,172 INFO L87 Difference]: Start difference. First operand 525 states and 865 transitions. Second operand 3 states. [2018-07-24 12:48:00,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:00,443 INFO L93 Difference]: Finished difference Result 1477 states and 2511 transitions. [2018-07-24 12:48:00,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:48:00,444 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 206 [2018-07-24 12:48:00,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:00,455 INFO L225 Difference]: With dead ends: 1477 [2018-07-24 12:48:00,455 INFO L226 Difference]: Without dead ends: 958 [2018-07-24 12:48:00,459 INFO L573 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 [2018-07-24 12:48:00,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2018-07-24 12:48:00,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 943. [2018-07-24 12:48:00,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 943 states. [2018-07-24 12:48:00,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1546 transitions. [2018-07-24 12:48:00,508 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1546 transitions. Word has length 206 [2018-07-24 12:48:00,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:00,511 INFO L471 AbstractCegarLoop]: Abstraction has 943 states and 1546 transitions. [2018-07-24 12:48:00,511 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:48:00,511 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1546 transitions. [2018-07-24 12:48:00,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-07-24 12:48:00,522 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:00,527 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:48:00,528 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:48:00,528 INFO L82 PathProgramCache]: Analyzing trace with hash 584750157, now seen corresponding path program 1 times [2018-07-24 12:48:00,528 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:00,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:00,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:00,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:00,530 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:00,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:01,078 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:01,079 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:48:01,079 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-07-24 12:48:01,079 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:01,080 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 12:48:01,083 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 12:48:01,083 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:48:01,083 INFO L87 Difference]: Start difference. First operand 943 states and 1546 transitions. Second operand 7 states. [2018-07-24 12:48:01,367 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-07-24 12:48:03,588 WARN L169 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 12:48:05,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:05,945 INFO L93 Difference]: Finished difference Result 2923 states and 5188 transitions. [2018-07-24 12:48:05,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:48:05,946 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 211 [2018-07-24 12:48:05,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:05,971 INFO L225 Difference]: With dead ends: 2923 [2018-07-24 12:48:05,972 INFO L226 Difference]: Without dead ends: 1986 [2018-07-24 12:48:05,977 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:48:05,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2018-07-24 12:48:06,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1885. [2018-07-24 12:48:06,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1885 states. [2018-07-24 12:48:06,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 3120 transitions. [2018-07-24 12:48:06,085 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 3120 transitions. Word has length 211 [2018-07-24 12:48:06,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:06,085 INFO L471 AbstractCegarLoop]: Abstraction has 1885 states and 3120 transitions. [2018-07-24 12:48:06,086 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 12:48:06,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 3120 transitions. [2018-07-24 12:48:06,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-07-24 12:48:06,095 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:06,096 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2018-07-24 12:48:06,096 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:48:06,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1555578558, now seen corresponding path program 1 times [2018-07-24 12:48:06,096 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:06,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:06,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:06,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:06,098 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:06,585 WARN L169 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-07-24 12:48:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:48:06,746 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:06,747 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:48:06,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:06,767 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:07,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-07-24 12:48:07,528 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:07,744 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 12:48:07,849 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 12:48:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:48:08,177 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:48:08,177 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 12:48:08,177 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:08,178 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:48:08,178 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:48:08,178 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:48:08,179 INFO L87 Difference]: Start difference. First operand 1885 states and 3120 transitions. Second operand 5 states. [2018-07-24 12:48:11,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:11,527 INFO L93 Difference]: Finished difference Result 6151 states and 10655 transitions. [2018-07-24 12:48:11,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:48:11,528 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 217 [2018-07-24 12:48:11,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:11,556 INFO L225 Difference]: With dead ends: 6151 [2018-07-24 12:48:11,556 INFO L226 Difference]: Without dead ends: 4272 [2018-07-24 12:48:11,568 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 429 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:48:11,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4272 states. [2018-07-24 12:48:11,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4272 to 3815. [2018-07-24 12:48:11,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3815 states. [2018-07-24 12:48:11,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3815 states to 3815 states and 6101 transitions. [2018-07-24 12:48:11,707 INFO L78 Accepts]: Start accepts. Automaton has 3815 states and 6101 transitions. Word has length 217 [2018-07-24 12:48:11,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:11,707 INFO L471 AbstractCegarLoop]: Abstraction has 3815 states and 6101 transitions. [2018-07-24 12:48:11,707 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:48:11,707 INFO L276 IsEmpty]: Start isEmpty. Operand 3815 states and 6101 transitions. [2018-07-24 12:48:11,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-07-24 12:48:11,723 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:11,724 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2018-07-24 12:48:11,724 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:48:11,724 INFO L82 PathProgramCache]: Analyzing trace with hash -223286947, now seen corresponding path program 1 times [2018-07-24 12:48:11,724 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:11,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:11,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:11,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:11,726 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:11,993 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:11,993 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:48:12,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:12,002 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:12,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:12,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:12,544 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:13,055 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:13,055 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:48:13,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:13,071 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:13,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-24 12:48:14,025 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-24 12:48:14,347 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 3 imperfect interpolant sequences. [2018-07-24 12:48:14,348 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 5, 5] total 17 [2018-07-24 12:48:14,348 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:14,348 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:48:14,349 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:48:14,349 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:48:14,349 INFO L87 Difference]: Start difference. First operand 3815 states and 6101 transitions. Second operand 5 states. [2018-07-24 12:48:15,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:15,659 INFO L93 Difference]: Finished difference Result 11548 states and 19002 transitions. [2018-07-24 12:48:15,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:48:15,660 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 218 [2018-07-24 12:48:15,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:15,706 INFO L225 Difference]: With dead ends: 11548 [2018-07-24 12:48:15,706 INFO L226 Difference]: Without dead ends: 7739 [2018-07-24 12:48:15,720 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 877 GetRequests, 860 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2018-07-24 12:48:15,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7739 states. [2018-07-24 12:48:15,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7739 to 7657. [2018-07-24 12:48:15,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7657 states. [2018-07-24 12:48:16,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7657 states to 7657 states and 12370 transitions. [2018-07-24 12:48:16,017 INFO L78 Accepts]: Start accepts. Automaton has 7657 states and 12370 transitions. Word has length 218 [2018-07-24 12:48:16,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:16,018 INFO L471 AbstractCegarLoop]: Abstraction has 7657 states and 12370 transitions. [2018-07-24 12:48:16,018 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:48:16,018 INFO L276 IsEmpty]: Start isEmpty. Operand 7657 states and 12370 transitions. [2018-07-24 12:48:16,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-07-24 12:48:16,046 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:16,047 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:48:16,047 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:48:16,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1292115596, now seen corresponding path program 1 times [2018-07-24 12:48:16,047 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:16,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:16,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:16,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:16,049 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:16,247 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:16,247 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:48:16,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:16,259 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:16,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:16,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-07-24 12:48:16,681 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:16,835 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 12:48:16,941 WARN L169 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 12:48:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-07-24 12:48:17,315 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:48:17,315 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2018-07-24 12:48:17,315 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:17,316 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:48:17,316 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:48:17,316 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:48:17,317 INFO L87 Difference]: Start difference. First operand 7657 states and 12370 transitions. Second operand 5 states. [2018-07-24 12:48:18,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:18,760 INFO L93 Difference]: Finished difference Result 23147 states and 38731 transitions. [2018-07-24 12:48:18,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:48:18,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 227 [2018-07-24 12:48:18,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:18,847 INFO L225 Difference]: With dead ends: 23147 [2018-07-24 12:48:18,848 INFO L226 Difference]: Without dead ends: 15496 [2018-07-24 12:48:18,873 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 446 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:48:18,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15496 states. [2018-07-24 12:48:19,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15496 to 15050. [2018-07-24 12:48:19,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15050 states. [2018-07-24 12:48:19,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15050 states to 15050 states and 24532 transitions. [2018-07-24 12:48:19,304 INFO L78 Accepts]: Start accepts. Automaton has 15050 states and 24532 transitions. Word has length 227 [2018-07-24 12:48:19,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:19,305 INFO L471 AbstractCegarLoop]: Abstraction has 15050 states and 24532 transitions. [2018-07-24 12:48:19,305 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:48:19,305 INFO L276 IsEmpty]: Start isEmpty. Operand 15050 states and 24532 transitions. [2018-07-24 12:48:19,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-07-24 12:48:19,356 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:19,357 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:48:19,357 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:48:19,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1815954702, now seen corresponding path program 1 times [2018-07-24 12:48:19,358 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:19,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:19,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:19,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:19,359 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:19,883 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:19,884 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-07-24 12:48:19,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:19,895 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:48:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:20,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:20,633 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:20,744 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:20,765 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:20,766 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 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 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:48:20,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:20,782 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:21,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:21,512 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:21,628 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:48:21,628 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-07-24 12:48:21,628 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:48:21,629 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:48:21,629 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:48:21,629 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:48:21,629 INFO L87 Difference]: Start difference. First operand 15050 states and 24532 transitions. Second operand 9 states. [2018-07-24 12:48:39,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:39,612 INFO L93 Difference]: Finished difference Result 103108 states and 225751 transitions. [2018-07-24 12:48:39,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-24 12:48:39,613 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 227 [2018-07-24 12:48:39,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:40,134 INFO L225 Difference]: With dead ends: 103108 [2018-07-24 12:48:40,134 INFO L226 Difference]: Without dead ends: 88064 [2018-07-24 12:48:40,309 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 923 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2018-07-24 12:48:40,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88064 states. [2018-07-24 12:48:43,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88064 to 84058. [2018-07-24 12:48:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84058 states. [2018-07-24 12:48:44,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84058 states to 84058 states and 126841 transitions. [2018-07-24 12:48:44,444 INFO L78 Accepts]: Start accepts. Automaton has 84058 states and 126841 transitions. Word has length 227 [2018-07-24 12:48:44,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:44,445 INFO L471 AbstractCegarLoop]: Abstraction has 84058 states and 126841 transitions. [2018-07-24 12:48:44,445 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:48:44,445 INFO L276 IsEmpty]: Start isEmpty. Operand 84058 states and 126841 transitions. [2018-07-24 12:48:44,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-07-24 12:48:44,639 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:44,639 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:48:44,639 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:48:44,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1679896798, now seen corresponding path program 1 times [2018-07-24 12:48:44,640 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:44,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:44,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:44,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:44,641 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:45,153 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:45,154 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:48:45,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:45,164 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:45,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:45,575 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-07-24 12:48:45,576 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-07-24 12:48:45,881 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:48:45,882 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-07-24 12:48:45,882 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:45,882 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:48:45,883 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:48:45,883 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:48:45,883 INFO L87 Difference]: Start difference. First operand 84058 states and 126841 transitions. Second operand 3 states. [2018-07-24 12:48:49,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:49,198 INFO L93 Difference]: Finished difference Result 236729 states and 356959 transitions. [2018-07-24 12:48:49,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:48:49,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2018-07-24 12:48:49,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:49,777 INFO L225 Difference]: With dead ends: 236729 [2018-07-24 12:48:49,777 INFO L226 Difference]: Without dead ends: 152697 [2018-07-24 12:48:50,667 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 464 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:48:50,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152697 states. [2018-07-24 12:48:53,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152697 to 152353. [2018-07-24 12:48:53,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152353 states. [2018-07-24 12:48:53,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152353 states to 152353 states and 217242 transitions. [2018-07-24 12:48:53,586 INFO L78 Accepts]: Start accepts. Automaton has 152353 states and 217242 transitions. Word has length 233 [2018-07-24 12:48:53,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:53,588 INFO L471 AbstractCegarLoop]: Abstraction has 152353 states and 217242 transitions. [2018-07-24 12:48:53,588 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:48:53,588 INFO L276 IsEmpty]: Start isEmpty. Operand 152353 states and 217242 transitions. [2018-07-24 12:48:53,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-07-24 12:48:53,768 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:53,768 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:48:53,769 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:48:53,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1949366092, now seen corresponding path program 1 times [2018-07-24 12:48:53,770 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:53,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:53,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:53,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:53,771 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:54,235 WARN L169 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:48:54,474 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:54,474 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:54,474 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:48:55,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:55,260 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:55,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:55,555 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:55,656 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:48:55,656 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-07-24 12:48:55,656 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:55,657 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:48:55,657 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:48:55,657 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:48:55,657 INFO L87 Difference]: Start difference. First operand 152353 states and 217242 transitions. Second operand 3 states. [2018-07-24 12:48:58,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:58,383 INFO L93 Difference]: Finished difference Result 276623 states and 389788 transitions. [2018-07-24 12:48:58,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:48:58,383 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 239 [2018-07-24 12:48:58,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:58,935 INFO L225 Difference]: With dead ends: 276623 [2018-07-24 12:48:58,936 INFO L226 Difference]: Without dead ends: 150242 [2018-07-24 12:48:59,170 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 477 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:48:59,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150242 states. [2018-07-24 12:49:02,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150242 to 149773. [2018-07-24 12:49:02,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149773 states. [2018-07-24 12:49:02,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149773 states to 149773 states and 209029 transitions. [2018-07-24 12:49:02,790 INFO L78 Accepts]: Start accepts. Automaton has 149773 states and 209029 transitions. Word has length 239 [2018-07-24 12:49:02,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:49:02,790 INFO L471 AbstractCegarLoop]: Abstraction has 149773 states and 209029 transitions. [2018-07-24 12:49:02,790 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:49:02,791 INFO L276 IsEmpty]: Start isEmpty. Operand 149773 states and 209029 transitions. [2018-07-24 12:49:02,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-07-24 12:49:02,899 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:49:02,899 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:49:02,899 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:49:02,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1873001038, now seen corresponding path program 1 times [2018-07-24 12:49:02,900 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:49:02,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:02,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:02,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:02,901 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:49:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:03,289 WARN L169 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 3 [2018-07-24 12:49:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:49:03,430 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:03,430 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:49:03,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:03,440 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:03,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:03,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:49:04,491 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:04,936 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 47 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:49:04,957 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:04,957 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-07-24 12:49:04,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:04,973 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:05,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:06,137 WARN L169 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2018-07-24 12:49:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:49:06,374 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:07,520 WARN L169 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-07-24 12:49:07,679 WARN L169 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2018-07-24 12:49:07,783 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2018-07-24 12:49:08,093 WARN L169 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2018-07-24 12:49:08,274 WARN L169 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2018-07-24 12:49:08,443 WARN L169 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2018-07-24 12:49:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 45 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:49:09,326 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:49:09,326 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8, 10, 11] total 36 [2018-07-24 12:49:09,326 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:49:09,326 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 12:49:09,327 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 12:49:09,327 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2018-07-24 12:49:09,327 INFO L87 Difference]: Start difference. First operand 149773 states and 209029 transitions. Second operand 14 states. [2018-07-24 12:49:28,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:49:28,064 INFO L93 Difference]: Finished difference Result 555277 states and 834049 transitions. [2018-07-24 12:49:28,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-24 12:49:28,065 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 241 [2018-07-24 12:49:28,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:49:29,804 INFO L225 Difference]: With dead ends: 555277 [2018-07-24 12:49:29,805 INFO L226 Difference]: Without dead ends: 405723 [2018-07-24 12:49:30,121 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 939 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=472, Invalid=2720, Unknown=0, NotChecked=0, Total=3192 [2018-07-24 12:49:30,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405723 states. [2018-07-24 12:49:43,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405723 to 396119. [2018-07-24 12:49:43,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396119 states. [2018-07-24 12:49:45,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396119 states to 396119 states and 556056 transitions. [2018-07-24 12:49:45,596 INFO L78 Accepts]: Start accepts. Automaton has 396119 states and 556056 transitions. Word has length 241 [2018-07-24 12:49:45,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:49:45,596 INFO L471 AbstractCegarLoop]: Abstraction has 396119 states and 556056 transitions. [2018-07-24 12:49:45,596 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-24 12:49:45,596 INFO L276 IsEmpty]: Start isEmpty. Operand 396119 states and 556056 transitions. [2018-07-24 12:49:45,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2018-07-24 12:49:45,887 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:49:45,888 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 12:49:45,888 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:49:45,888 INFO L82 PathProgramCache]: Analyzing trace with hash -2091140557, now seen corresponding path program 1 times [2018-07-24 12:49:45,888 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:49:45,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:45,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:45,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:45,889 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:49:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:49:46,475 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:46,475 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:49:46,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:46,491 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:46,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:47,314 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:49:47,315 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:47,561 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 12:49:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:49:47,712 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:47,712 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:49:47,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:47,728 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:48,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:49:48,517 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:49:49,738 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:49:49,738 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-07-24 12:49:49,738 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:49:49,739 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:49:49,739 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:49:49,739 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:49:49,740 INFO L87 Difference]: Start difference. First operand 396119 states and 556056 transitions. Second operand 9 states. [2018-07-24 12:50:13,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:50:13,040 INFO L93 Difference]: Finished difference Result 963139 states and 1554589 transitions. [2018-07-24 12:50:13,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-24 12:50:13,042 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 297 [2018-07-24 12:50:13,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:50:16,687 INFO L225 Difference]: With dead ends: 963139 [2018-07-24 12:50:16,687 INFO L226 Difference]: Without dead ends: 567457 [2018-07-24 12:50:17,447 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1243 GetRequests, 1195 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=447, Invalid=1809, Unknown=0, NotChecked=0, Total=2256 [2018-07-24 12:50:17,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567457 states. [2018-07-24 12:50:39,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567457 to 535572. [2018-07-24 12:50:39,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535572 states. [2018-07-24 12:50:40,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535572 states to 535572 states and 674162 transitions. [2018-07-24 12:50:40,356 INFO L78 Accepts]: Start accepts. Automaton has 535572 states and 674162 transitions. Word has length 297 [2018-07-24 12:50:40,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:50:40,357 INFO L471 AbstractCegarLoop]: Abstraction has 535572 states and 674162 transitions. [2018-07-24 12:50:40,357 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:50:40,357 INFO L276 IsEmpty]: Start isEmpty. Operand 535572 states and 674162 transitions. [2018-07-24 12:50:40,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-07-24 12:50:40,559 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:50:40,560 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:50:40,560 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:50:40,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1210419489, now seen corresponding path program 1 times [2018-07-24 12:50:40,560 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:50:40,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:40,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:40,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:40,561 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:50:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:50:41,250 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:50:41,250 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:50:41,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:41,268 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:50:42,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:42,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:50:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:50:43,073 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:50:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:50:43,223 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:50:43,223 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:50:43,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:43,239 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:50:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:43,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:50:44,053 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 113 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:50:44,053 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:50:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:50:44,360 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:50:44,361 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 8] total 17 [2018-07-24 12:50:44,361 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:50:44,361 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:50:44,361 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:50:44,362 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:50:44,362 INFO L87 Difference]: Start difference. First operand 535572 states and 674162 transitions. Second operand 6 states. [2018-07-24 12:50:51,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:50:51,864 INFO L93 Difference]: Finished difference Result 830336 states and 1041084 transitions. [2018-07-24 12:50:51,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-24 12:50:51,864 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 313 [2018-07-24 12:50:51,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:50:52,471 INFO L225 Difference]: With dead ends: 830336 [2018-07-24 12:50:52,471 INFO L226 Difference]: Without dead ends: 296745 [2018-07-24 12:50:52,826 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1258 GetRequests, 1238 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2018-07-24 12:50:52,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296745 states. [2018-07-24 12:50:57,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296745 to 280817. [2018-07-24 12:50:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280817 states. [2018-07-24 12:50:58,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280817 states to 280817 states and 343965 transitions. [2018-07-24 12:50:58,334 INFO L78 Accepts]: Start accepts. Automaton has 280817 states and 343965 transitions. Word has length 313 [2018-07-24 12:50:58,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:50:58,335 INFO L471 AbstractCegarLoop]: Abstraction has 280817 states and 343965 transitions. [2018-07-24 12:50:58,335 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:50:58,335 INFO L276 IsEmpty]: Start isEmpty. Operand 280817 states and 343965 transitions. [2018-07-24 12:50:58,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-07-24 12:50:58,429 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:50:58,429 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:50:58,430 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:50:58,430 INFO L82 PathProgramCache]: Analyzing trace with hash -551964203, now seen corresponding path program 1 times [2018-07-24 12:50:58,430 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:50:58,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:58,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:58,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:58,431 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:50:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 225 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:50:58,796 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:50:58,796 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:50:58,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:58,804 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:50:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:59,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:51:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-07-24 12:51:00,087 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:51:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-07-24 12:51:00,260 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:51:00,261 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-07-24 12:51:00,261 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:51:00,261 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:51:00,261 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:51:00,262 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:51:00,262 INFO L87 Difference]: Start difference. First operand 280817 states and 343965 transitions. Second operand 3 states. Received shutdown request... [2018-07-24 12:51:08,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:51:08,986 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:51:08,992 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:51:08,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:51:08 BoogieIcfgContainer [2018-07-24 12:51:08,993 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:51:08,994 INFO L168 Benchmark]: Toolchain (without parser) took 201927.10 ms. Allocated memory was 1.5 GB in the beginning and 5.8 GB in the end (delta: 4.2 GB). Free memory was 1.4 GB in the beginning and 4.9 GB in the end (delta: -3.5 GB). Peak memory consumption was 5.6 GB. Max. memory is 7.1 GB. [2018-07-24 12:51:08,995 INFO L168 Benchmark]: CDTParser took 0.23 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. [2018-07-24 12:51:08,995 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1199.04 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-07-24 12:51:08,996 INFO L168 Benchmark]: Boogie Procedure Inliner took 149.85 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. [2018-07-24 12:51:08,997 INFO L168 Benchmark]: Boogie Preprocessor took 349.24 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 812.1 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -946.5 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. [2018-07-24 12:51:08,998 INFO L168 Benchmark]: RCFGBuilder took 5160.82 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: 305.0 MB). Peak memory consumption was 305.0 MB. Max. memory is 7.1 GB. [2018-07-24 12:51:08,998 INFO L168 Benchmark]: TraceAbstraction took 195063.28 ms. Allocated memory was 2.4 GB in the beginning and 5.8 GB in the end (delta: 3.4 GB). Free memory was 2.0 GB in the beginning and 4.9 GB in the end (delta: -2.9 GB). Peak memory consumption was 5.3 GB. Max. memory is 7.1 GB. [2018-07-24 12:51:09,004 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 1199.04 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 149.85 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 349.24 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 812.1 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -946.5 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5160.82 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: 305.0 MB). Peak memory consumption was 305.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 195063.28 ms. Allocated memory was 2.4 GB in the beginning and 5.8 GB in the end (delta: 3.4 GB). Free memory was 2.0 GB in the beginning and 4.9 GB in the end (delta: -2.9 GB). Peak memory consumption was 5.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1593]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1593). Cancelled while BasicCegarLoop was constructing difference of abstraction (280817states) and interpolant automaton (currently 3 states, 3 states before enhancement), while ReachableStatesComputation was computing reachable states (432472 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 194.9s OverallTime, 13 OverallIterations, 3 TraceHistogramMax, 108.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3154 SDtfs, 20332 SDslu, 4977 SDs, 0 SdLazy, 26296 SolverSat, 7109 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 46.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7946 GetRequests, 7697 SyntacticMatches, 26 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 13.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=535572occurred in iteration=11, 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: 55.6s AutomataMinimizationTime, 12 MinimizatonAttempts, 63342 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 2.6s SsaConstructionTime, 5.0s SatisfiabilityAnalysisTime, 19.6s InterpolantComputationTime, 7050 NumberOfCodeBlocks, 7050 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 10875 ConstructedInterpolants, 0 QuantifiedInterpolants, 7021833 SizeOfPredicates, 52 NumberOfNonLiveVariables, 15974 ConjunctsInSsa, 245 ConjunctsInUnsatCore, 43 InterpolantComputations, 14 PerfectInterpolantSequences, 3012/3209 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_label01_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-51-09-026.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label01_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-51-09-026.csv Completed graceful shutdown