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/Problem16_label06_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:15:54,955 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:15:54,957 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:15:54,968 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:15:54,969 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:15:54,970 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:15:54,971 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:15:54,973 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:15:54,976 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:15:54,980 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:15:54,981 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:15:54,981 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:15:54,982 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:15:54,983 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:15:54,986 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:15:54,987 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:15:54,988 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:15:54,995 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:15:54,997 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:15:54,999 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:15:55,002 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:15:55,005 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:15:55,009 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:15:55,009 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:15:55,010 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:15:55,013 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:15:55,014 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:15:55,015 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:15:55,016 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:15:55,017 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:15:55,019 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:15:55,020 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 12:15:55,020 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:15:55,020 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:15:55,022 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:15:55,023 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:15:55,023 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 12:15:55,049 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:15:55,050 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:15:55,051 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:15:55,051 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:15:55,052 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:15:55,052 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:15:55,052 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:15:55,053 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:15:55,053 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:15:55,053 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:15:55,053 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:15:55,054 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:15:55,054 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:15:55,054 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:15:55,054 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:15:55,055 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:15:55,055 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:15:55,055 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:15:55,055 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:15:55,055 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:15:55,056 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:15:55,056 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:15:55,056 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:15:55,056 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:15:55,056 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:15:55,056 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:15:55,057 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:15:55,057 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:15:55,057 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:15:55,057 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:15:55,057 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:15:55,058 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:15:55,058 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:15:55,102 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:15:55,118 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:15:55,124 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:15:55,126 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:15:55,126 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:15:55,127 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label06_false-unreach-call.c [2018-07-24 12:15:55,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4a8b3659/500e21b3fb574a838d7973d06e67c9b1/FLAG697d9c131 [2018-07-24 12:15:55,836 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:15:55,837 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label06_false-unreach-call.c [2018-07-24 12:15:55,860 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4a8b3659/500e21b3fb574a838d7973d06e67c9b1/FLAG697d9c131 [2018-07-24 12:15:55,878 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4a8b3659/500e21b3fb574a838d7973d06e67c9b1 [2018-07-24 12:15:55,891 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:15:55,893 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:15:55,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:15:55,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:15:55,901 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:15:55,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:15:55" (1/1) ... [2018-07-24 12:15:55,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21ff6b0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:55, skipping insertion in model container [2018-07-24 12:15:55,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:15:55" (1/1) ... [2018-07-24 12:15:56,143 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:15:56,704 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:15:56,728 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:15:57,011 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:15:57,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:57 WrapperNode [2018-07-24 12:15:57,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:15:57,111 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:15:57,111 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:15:57,111 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:15:57,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:57" (1/1) ... [2018-07-24 12:15:57,183 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:57" (1/1) ... [2018-07-24 12:15:57,294 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:15:57,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:15:57,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:15:57,295 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:15:57,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:57" (1/1) ... [2018-07-24 12:15:57,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:57" (1/1) ... [2018-07-24 12:15:57,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:57" (1/1) ... [2018-07-24 12:15:57,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:57" (1/1) ... [2018-07-24 12:15:57,388 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:57" (1/1) ... [2018-07-24 12:15:57,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:57" (1/1) ... [2018-07-24 12:15:57,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:57" (1/1) ... [2018-07-24 12:15:57,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:15:57,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:15:57,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:15:57,808 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:15:57,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:57" (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 12:15:57,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:15:57,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:15:57,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:15:57,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:15:57,880 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:15:57,880 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:15:57,881 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output2 [2018-07-24 12:15:57,881 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output2 [2018-07-24 12:15:57,881 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 12:15:57,881 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 12:16:03,895 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:16:03,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:16:03 BoogieIcfgContainer [2018-07-24 12:16:03,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:16:03,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:16:03,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:16:03,902 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:16:03,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:15:55" (1/3) ... [2018-07-24 12:16:03,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b680f19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:16:03, skipping insertion in model container [2018-07-24 12:16:03,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:57" (2/3) ... [2018-07-24 12:16:03,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b680f19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:16:03, skipping insertion in model container [2018-07-24 12:16:03,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:16:03" (3/3) ... [2018-07-24 12:16:03,910 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label06_false-unreach-call.c [2018-07-24 12:16:03,921 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:16:03,930 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:16:03,986 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:16:03,987 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:16:03,987 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:16:03,987 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:16:03,987 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:16:03,988 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:16:03,988 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:16:03,988 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:16:03,988 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:16:04,019 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-07-24 12:16:04,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-07-24 12:16:04,026 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:16:04,027 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:16:04,027 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:16:04,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1101064579, now seen corresponding path program 1 times [2018-07-24 12:16:04,036 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:16:04,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:04,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:04,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:04,090 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:16:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:04,429 WARN L169 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:16:04,520 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 12:16:04,522 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:16:04,523 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:16:04,523 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:16:04,527 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:16:04,541 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:16:04,542 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:16:04,544 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 3 states. [2018-07-24 12:16:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:16:08,097 INFO L93 Difference]: Finished difference Result 1156 states and 2144 transitions. [2018-07-24 12:16:08,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:16:08,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2018-07-24 12:16:08,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:16:08,125 INFO L225 Difference]: With dead ends: 1156 [2018-07-24 12:16:08,126 INFO L226 Difference]: Without dead ends: 744 [2018-07-24 12:16:08,134 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 12:16:08,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2018-07-24 12:16:08,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2018-07-24 12:16:08,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-07-24 12:16:08,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1343 transitions. [2018-07-24 12:16:08,234 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1343 transitions. Word has length 17 [2018-07-24 12:16:08,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:16:08,235 INFO L471 AbstractCegarLoop]: Abstraction has 744 states and 1343 transitions. [2018-07-24 12:16:08,235 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:16:08,235 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1343 transitions. [2018-07-24 12:16:08,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-07-24 12:16:08,241 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:16:08,242 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] [2018-07-24 12:16:08,242 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:16:08,243 INFO L82 PathProgramCache]: Analyzing trace with hash 312625545, now seen corresponding path program 1 times [2018-07-24 12:16:08,243 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:16:08,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:08,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:08,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:08,245 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:16:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:08,849 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 12:16:08,850 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:16:08,850 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:16:08,850 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:16:08,852 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:16:08,852 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:16:08,853 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:16:08,853 INFO L87 Difference]: Start difference. First operand 744 states and 1343 transitions. Second operand 6 states. [2018-07-24 12:16:17,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:16:17,335 INFO L93 Difference]: Finished difference Result 2846 states and 5292 transitions. [2018-07-24 12:16:17,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:16:17,337 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 90 [2018-07-24 12:16:17,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:16:17,359 INFO L225 Difference]: With dead ends: 2846 [2018-07-24 12:16:17,359 INFO L226 Difference]: Without dead ends: 2108 [2018-07-24 12:16:17,367 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:16:17,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2018-07-24 12:16:17,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 2090. [2018-07-24 12:16:17,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2090 states. [2018-07-24 12:16:17,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 3323 transitions. [2018-07-24 12:16:17,466 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 3323 transitions. Word has length 90 [2018-07-24 12:16:17,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:16:17,466 INFO L471 AbstractCegarLoop]: Abstraction has 2090 states and 3323 transitions. [2018-07-24 12:16:17,466 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:16:17,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 3323 transitions. [2018-07-24 12:16:17,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-07-24 12:16:17,472 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:16:17,472 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] [2018-07-24 12:16:17,472 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:16:17,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1178865332, now seen corresponding path program 1 times [2018-07-24 12:16:17,473 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:16:17,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:17,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:17,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:17,474 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:16:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:17,757 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 12:16:17,757 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:16:17,758 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:16:17,758 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:16:17,758 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:16:17,759 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:16:17,759 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:16:17,759 INFO L87 Difference]: Start difference. First operand 2090 states and 3323 transitions. Second operand 6 states. [2018-07-24 12:16:24,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:16:24,207 INFO L93 Difference]: Finished difference Result 5582 states and 9314 transitions. [2018-07-24 12:16:24,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:16:24,208 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2018-07-24 12:16:24,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:16:24,236 INFO L225 Difference]: With dead ends: 5582 [2018-07-24 12:16:24,236 INFO L226 Difference]: Without dead ends: 3498 [2018-07-24 12:16:24,244 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:16:24,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2018-07-24 12:16:24,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 3486. [2018-07-24 12:16:24,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3486 states. [2018-07-24 12:16:24,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 3486 states and 5371 transitions. [2018-07-24 12:16:24,358 INFO L78 Accepts]: Start accepts. Automaton has 3486 states and 5371 transitions. Word has length 119 [2018-07-24 12:16:24,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:16:24,359 INFO L471 AbstractCegarLoop]: Abstraction has 3486 states and 5371 transitions. [2018-07-24 12:16:24,359 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:16:24,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3486 states and 5371 transitions. [2018-07-24 12:16:24,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-07-24 12:16:24,369 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:16:24,369 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] [2018-07-24 12:16:24,370 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:16:24,371 INFO L82 PathProgramCache]: Analyzing trace with hash 764134297, now seen corresponding path program 1 times [2018-07-24 12:16:24,371 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:16:24,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:24,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:24,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:24,372 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:16:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:24,720 WARN L169 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:16:25,146 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 12:16:25,147 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:16:25,147 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:16:25,147 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:16:25,148 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:16:25,148 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:16:25,150 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:16:25,151 INFO L87 Difference]: Start difference. First operand 3486 states and 5371 transitions. Second operand 6 states. [2018-07-24 12:16:28,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:16:28,611 INFO L93 Difference]: Finished difference Result 7689 states and 11877 transitions. [2018-07-24 12:16:28,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:16:28,612 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 162 [2018-07-24 12:16:28,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:16:28,633 INFO L225 Difference]: With dead ends: 7689 [2018-07-24 12:16:28,634 INFO L226 Difference]: Without dead ends: 4209 [2018-07-24 12:16:28,648 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:16:28,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4209 states. [2018-07-24 12:16:28,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4209 to 4182. [2018-07-24 12:16:28,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4182 states. [2018-07-24 12:16:28,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4182 states to 4182 states and 5894 transitions. [2018-07-24 12:16:28,758 INFO L78 Accepts]: Start accepts. Automaton has 4182 states and 5894 transitions. Word has length 162 [2018-07-24 12:16:28,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:16:28,759 INFO L471 AbstractCegarLoop]: Abstraction has 4182 states and 5894 transitions. [2018-07-24 12:16:28,759 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:16:28,759 INFO L276 IsEmpty]: Start isEmpty. Operand 4182 states and 5894 transitions. [2018-07-24 12:16:28,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-07-24 12:16:28,761 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:16:28,761 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] [2018-07-24 12:16:28,762 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:16:28,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1212244976, now seen corresponding path program 1 times [2018-07-24 12:16:28,762 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:16:28,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:28,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:28,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:28,763 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:16:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:29,025 WARN L169 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:16:29,106 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 12:16:29,107 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:16:29,107 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:16:29,107 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:16:29,107 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:16:29,108 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:16:29,108 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:16:29,108 INFO L87 Difference]: Start difference. First operand 4182 states and 5894 transitions. Second operand 6 states. [2018-07-24 12:16:33,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:16:33,291 INFO L93 Difference]: Finished difference Result 10431 states and 14678 transitions. [2018-07-24 12:16:33,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:16:33,292 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 181 [2018-07-24 12:16:33,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:16:33,321 INFO L225 Difference]: With dead ends: 10431 [2018-07-24 12:16:33,321 INFO L226 Difference]: Without dead ends: 6255 [2018-07-24 12:16:33,344 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:16:33,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6255 states. [2018-07-24 12:16:33,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6255 to 6224. [2018-07-24 12:16:33,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6224 states. [2018-07-24 12:16:33,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6224 states to 6224 states and 8248 transitions. [2018-07-24 12:16:33,478 INFO L78 Accepts]: Start accepts. Automaton has 6224 states and 8248 transitions. Word has length 181 [2018-07-24 12:16:33,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:16:33,479 INFO L471 AbstractCegarLoop]: Abstraction has 6224 states and 8248 transitions. [2018-07-24 12:16:33,479 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:16:33,479 INFO L276 IsEmpty]: Start isEmpty. Operand 6224 states and 8248 transitions. [2018-07-24 12:16:33,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-07-24 12:16:33,483 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:16:33,483 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:16:33,483 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:16:33,484 INFO L82 PathProgramCache]: Analyzing trace with hash 557548392, now seen corresponding path program 1 times [2018-07-24 12:16:33,484 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:16:33,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:33,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:33,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:33,485 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:16:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:33,971 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-24 12:16:33,972 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:16:33,972 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 12:16:33,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:33,990 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:16:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:34,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:16:34,283 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 12:16:34,283 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:16:34,509 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 12:16:34,543 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:16:34,543 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2018-07-24 12:16:34,543 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:16:34,544 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:16:34,545 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:16:34,545 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:16:34,545 INFO L87 Difference]: Start difference. First operand 6224 states and 8248 transitions. Second operand 3 states. [2018-07-24 12:16:38,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:16:38,136 INFO L93 Difference]: Finished difference Result 13456 states and 17832 transitions. [2018-07-24 12:16:38,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:16:38,137 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 257 [2018-07-24 12:16:38,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:16:38,178 INFO L225 Difference]: With dead ends: 13456 [2018-07-24 12:16:38,178 INFO L226 Difference]: Without dead ends: 7238 [2018-07-24 12:16:38,216 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 516 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:16:38,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7238 states. [2018-07-24 12:16:38,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7238 to 7238. [2018-07-24 12:16:38,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7238 states. [2018-07-24 12:16:38,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7238 states to 7238 states and 9351 transitions. [2018-07-24 12:16:38,484 INFO L78 Accepts]: Start accepts. Automaton has 7238 states and 9351 transitions. Word has length 257 [2018-07-24 12:16:38,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:16:38,485 INFO L471 AbstractCegarLoop]: Abstraction has 7238 states and 9351 transitions. [2018-07-24 12:16:38,485 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:16:38,485 INFO L276 IsEmpty]: Start isEmpty. Operand 7238 states and 9351 transitions. [2018-07-24 12:16:38,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-07-24 12:16:38,496 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:16:38,497 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 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 12:16:38,497 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:16:38,498 INFO L82 PathProgramCache]: Analyzing trace with hash -786011777, now seen corresponding path program 1 times [2018-07-24 12:16:38,498 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:16:38,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:38,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:38,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:38,499 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:16:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:38,877 WARN L169 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:16:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 28 proven. 204 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-07-24 12:16:39,810 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:16:39,810 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 12:16:39,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:39,829 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:16:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:39,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:16:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-07-24 12:16:40,229 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:16:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-07-24 12:16:40,914 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:16:40,914 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-07-24 12:16:40,915 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:16:40,915 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:16:40,916 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:16:40,916 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:16:40,916 INFO L87 Difference]: Start difference. First operand 7238 states and 9351 transitions. Second operand 3 states. [2018-07-24 12:16:43,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:16:43,748 INFO L93 Difference]: Finished difference Result 14810 states and 19217 transitions. [2018-07-24 12:16:43,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:16:43,748 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 362 [2018-07-24 12:16:43,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:16:43,793 INFO L225 Difference]: With dead ends: 14810 [2018-07-24 12:16:43,794 INFO L226 Difference]: Without dead ends: 7578 [2018-07-24 12:16:43,818 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 735 GetRequests, 724 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:16:43,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7578 states. [2018-07-24 12:16:43,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7578 to 7575. [2018-07-24 12:16:43,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7575 states. [2018-07-24 12:16:43,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7575 states to 7575 states and 9441 transitions. [2018-07-24 12:16:43,963 INFO L78 Accepts]: Start accepts. Automaton has 7575 states and 9441 transitions. Word has length 362 [2018-07-24 12:16:43,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:16:43,964 INFO L471 AbstractCegarLoop]: Abstraction has 7575 states and 9441 transitions. [2018-07-24 12:16:43,964 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:16:43,964 INFO L276 IsEmpty]: Start isEmpty. Operand 7575 states and 9441 transitions. [2018-07-24 12:16:43,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2018-07-24 12:16:43,986 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:16:43,986 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 12:16:43,986 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:16:43,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1708693555, now seen corresponding path program 1 times [2018-07-24 12:16:43,987 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:16:43,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:43,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:43,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:43,988 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:16:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 164 proven. 185 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-07-24 12:16:44,698 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:16:44,698 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:16:44,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:44,706 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:16:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:44,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:16:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 524 proven. 2 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2018-07-24 12:16:45,141 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:16:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 164 proven. 185 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-07-24 12:16:45,499 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:16:45,499 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 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:16:45,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:45,517 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:16:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:45,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:16:46,115 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 524 proven. 2 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2018-07-24 12:16:46,115 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:16:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 164 proven. 185 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-07-24 12:16:46,812 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:16:46,813 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-07-24 12:16:46,813 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:16:46,814 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:16:46,817 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:16:46,817 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:16:46,817 INFO L87 Difference]: Start difference. First operand 7575 states and 9441 transitions. Second operand 9 states. [2018-07-24 12:16:54,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:16:54,695 INFO L93 Difference]: Finished difference Result 20434 states and 26446 transitions. [2018-07-24 12:16:54,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-24 12:16:54,695 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 495 [2018-07-24 12:16:54,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:16:54,750 INFO L225 Difference]: With dead ends: 20434 [2018-07-24 12:16:54,750 INFO L226 Difference]: Without dead ends: 12865 [2018-07-24 12:16:54,784 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2000 GetRequests, 1979 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2018-07-24 12:16:54,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12865 states. [2018-07-24 12:16:55,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12865 to 12803. [2018-07-24 12:16:55,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12803 states. [2018-07-24 12:16:55,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12803 states to 12803 states and 15720 transitions. [2018-07-24 12:16:55,204 INFO L78 Accepts]: Start accepts. Automaton has 12803 states and 15720 transitions. Word has length 495 [2018-07-24 12:16:55,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:16:55,204 INFO L471 AbstractCegarLoop]: Abstraction has 12803 states and 15720 transitions. [2018-07-24 12:16:55,205 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:16:55,205 INFO L276 IsEmpty]: Start isEmpty. Operand 12803 states and 15720 transitions. [2018-07-24 12:16:55,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 698 [2018-07-24 12:16:55,249 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:16:55,250 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:16:55,250 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:16:55,250 INFO L82 PathProgramCache]: Analyzing trace with hash -146060098, now seen corresponding path program 1 times [2018-07-24 12:16:55,250 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:16:55,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:55,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:55,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:55,252 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:16:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:55,644 WARN L169 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:16:56,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 50 proven. 440 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2018-07-24 12:16:56,090 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:16:56,090 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:16:56,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:56,098 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:16:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:56,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:16:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 466 proven. 0 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2018-07-24 12:16:56,721 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:16:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 50 proven. 440 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2018-07-24 12:16:57,181 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:16:57,181 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 12:16:57,181 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:16:57,182 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:16:57,182 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:16:57,182 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:16:57,183 INFO L87 Difference]: Start difference. First operand 12803 states and 15720 transitions. Second operand 5 states. [2018-07-24 12:17:03,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:17:03,469 INFO L93 Difference]: Finished difference Result 26554 states and 32792 transitions. [2018-07-24 12:17:03,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:17:03,476 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 697 [2018-07-24 12:17:03,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:17:03,539 INFO L225 Difference]: With dead ends: 26554 [2018-07-24 12:17:03,539 INFO L226 Difference]: Without dead ends: 13757 [2018-07-24 12:17:03,583 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1403 GetRequests, 1389 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:17:03,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13757 states. [2018-07-24 12:17:03,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13757 to 13729. [2018-07-24 12:17:03,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13729 states. [2018-07-24 12:17:04,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13729 states to 13729 states and 16530 transitions. [2018-07-24 12:17:04,192 INFO L78 Accepts]: Start accepts. Automaton has 13729 states and 16530 transitions. Word has length 697 [2018-07-24 12:17:04,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:17:04,193 INFO L471 AbstractCegarLoop]: Abstraction has 13729 states and 16530 transitions. [2018-07-24 12:17:04,193 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:17:04,193 INFO L276 IsEmpty]: Start isEmpty. Operand 13729 states and 16530 transitions. [2018-07-24 12:17:04,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 728 [2018-07-24 12:17:04,241 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:17:04,242 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:17:04,242 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:17:04,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1705286182, now seen corresponding path program 1 times [2018-07-24 12:17:04,243 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:17:04,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:04,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:04,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:04,244 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:17:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 682 proven. 97 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-07-24 12:17:05,311 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:17:05,311 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-07-24 12:17:05,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:05,325 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:17:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:05,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:17:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 433 proven. 2 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2018-07-24 12:17:06,101 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:17:06,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 433 proven. 2 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2018-07-24 12:17:06,699 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:17:06,699 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:17:06,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:06,715 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:17:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:07,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:17:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 682 proven. 6 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2018-07-24 12:17:07,562 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:17:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 684 proven. 4 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2018-07-24 12:17:08,248 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:17:08,249 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 12:17:08,249 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:17:08,250 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:17:08,251 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:17:08,251 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:17:08,251 INFO L87 Difference]: Start difference. First operand 13729 states and 16530 transitions. Second operand 9 states. [2018-07-24 12:17:14,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:17:14,127 INFO L93 Difference]: Finished difference Result 34821 states and 43043 transitions. [2018-07-24 12:17:14,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-24 12:17:14,128 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 727 [2018-07-24 12:17:14,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:17:14,192 INFO L225 Difference]: With dead ends: 34821 [2018-07-24 12:17:14,193 INFO L226 Difference]: Without dead ends: 18050 [2018-07-24 12:17:14,267 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2930 GetRequests, 2907 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2018-07-24 12:17:14,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18050 states. [2018-07-24 12:17:14,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18050 to 17453. [2018-07-24 12:17:14,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17453 states. [2018-07-24 12:17:14,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17453 states to 17453 states and 19114 transitions. [2018-07-24 12:17:14,592 INFO L78 Accepts]: Start accepts. Automaton has 17453 states and 19114 transitions. Word has length 727 [2018-07-24 12:17:14,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:17:14,594 INFO L471 AbstractCegarLoop]: Abstraction has 17453 states and 19114 transitions. [2018-07-24 12:17:14,594 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:17:14,594 INFO L276 IsEmpty]: Start isEmpty. Operand 17453 states and 19114 transitions. [2018-07-24 12:17:14,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1026 [2018-07-24 12:17:14,646 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:17:14,647 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:17:14,647 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:17:14,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1482267240, now seen corresponding path program 1 times [2018-07-24 12:17:14,648 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:17:14,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:14,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:14,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:14,649 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:17:14,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:15,710 WARN L169 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-07-24 12:17:16,164 WARN L169 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-07-24 12:17:16,483 WARN L169 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-07-24 12:17:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2234 backedges. 796 proven. 337 refuted. 0 times theorem prover too weak. 1101 trivial. 0 not checked. [2018-07-24 12:17:17,829 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:17:17,829 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 12:17:17,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:17,839 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:17:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:18,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:17:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2234 backedges. 518 proven. 2 refuted. 0 times theorem prover too weak. 1714 trivial. 0 not checked. [2018-07-24 12:17:19,003 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:17:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2234 backedges. 518 proven. 2 refuted. 0 times theorem prover too weak. 1714 trivial. 0 not checked. [2018-07-24 12:17:19,535 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:17:19,536 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 10 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 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:17:19,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:19,553 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:17:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:20,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:17:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2234 backedges. 518 proven. 2 refuted. 0 times theorem prover too weak. 1714 trivial. 0 not checked. [2018-07-24 12:17:21,239 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:17:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2234 backedges. 518 proven. 2 refuted. 0 times theorem prover too weak. 1714 trivial. 0 not checked. [2018-07-24 12:17:21,773 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:17:21,774 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5, 5, 5] total 20 [2018-07-24 12:17:21,774 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:17:21,776 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-24 12:17:21,776 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-24 12:17:21,776 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-07-24 12:17:21,777 INFO L87 Difference]: Start difference. First operand 17453 states and 19114 transitions. Second operand 19 states. [2018-07-24 12:17:34,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:17:34,043 INFO L93 Difference]: Finished difference Result 37390 states and 41985 transitions. [2018-07-24 12:17:34,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-24 12:17:34,044 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1025 [2018-07-24 12:17:34,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:17:34,122 INFO L225 Difference]: With dead ends: 37390 [2018-07-24 12:17:34,122 INFO L226 Difference]: Without dead ends: 19948 [2018-07-24 12:17:34,181 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4182 GetRequests, 4121 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=679, Invalid=2401, Unknown=0, NotChecked=0, Total=3080 [2018-07-24 12:17:34,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19948 states. [2018-07-24 12:17:34,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19948 to 19889. [2018-07-24 12:17:34,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19889 states. [2018-07-24 12:17:34,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19889 states to 19889 states and 21826 transitions. [2018-07-24 12:17:34,588 INFO L78 Accepts]: Start accepts. Automaton has 19889 states and 21826 transitions. Word has length 1025 [2018-07-24 12:17:34,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:17:34,590 INFO L471 AbstractCegarLoop]: Abstraction has 19889 states and 21826 transitions. [2018-07-24 12:17:34,590 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-24 12:17:34,590 INFO L276 IsEmpty]: Start isEmpty. Operand 19889 states and 21826 transitions. [2018-07-24 12:17:34,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1041 [2018-07-24 12:17:34,650 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:17:34,650 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:17:34,651 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:17:34,651 INFO L82 PathProgramCache]: Analyzing trace with hash -144061959, now seen corresponding path program 1 times [2018-07-24 12:17:34,651 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:17:34,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:34,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:34,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:34,654 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:17:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2309 backedges. 70 proven. 743 refuted. 0 times theorem prover too weak. 1496 trivial. 0 not checked. [2018-07-24 12:17:36,127 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:17:36,127 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:17:36,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:36,136 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:17:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:36,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:17:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2309 backedges. 777 proven. 0 refuted. 0 times theorem prover too weak. 1532 trivial. 0 not checked. [2018-07-24 12:17:37,110 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:17:37,294 WARN L169 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2018-07-24 12:17:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2309 backedges. 70 proven. 743 refuted. 0 times theorem prover too weak. 1496 trivial. 0 not checked. [2018-07-24 12:17:38,763 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:17:38,763 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2018-07-24 12:17:38,764 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:17:38,764 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:17:38,765 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:17:38,765 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:17:38,765 INFO L87 Difference]: Start difference. First operand 19889 states and 21826 transitions. Second operand 5 states. [2018-07-24 12:17:42,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:17:42,754 INFO L93 Difference]: Finished difference Result 43326 states and 46824 transitions. [2018-07-24 12:17:42,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:17:42,754 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1040 [2018-07-24 12:17:42,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:17:42,817 INFO L225 Difference]: With dead ends: 43326 [2018-07-24 12:17:42,817 INFO L226 Difference]: Without dead ends: 23448 [2018-07-24 12:17:42,883 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2087 GetRequests, 2076 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:17:42,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23448 states. [2018-07-24 12:17:43,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23448 to 19859. [2018-07-24 12:17:43,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19859 states. [2018-07-24 12:17:43,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19859 states to 19859 states and 21182 transitions. [2018-07-24 12:17:43,231 INFO L78 Accepts]: Start accepts. Automaton has 19859 states and 21182 transitions. Word has length 1040 [2018-07-24 12:17:43,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:17:43,232 INFO L471 AbstractCegarLoop]: Abstraction has 19859 states and 21182 transitions. [2018-07-24 12:17:43,232 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:17:43,232 INFO L276 IsEmpty]: Start isEmpty. Operand 19859 states and 21182 transitions. [2018-07-24 12:17:43,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1289 [2018-07-24 12:17:43,288 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:17:43,289 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:17:43,289 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:17:43,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1056816924, now seen corresponding path program 1 times [2018-07-24 12:17:43,290 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:17:43,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:43,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:43,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:43,291 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:17:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:44,347 WARN L169 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-07-24 12:17:44,632 WARN L169 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-07-24 12:17:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3340 backedges. 654 proven. 195 refuted. 0 times theorem prover too weak. 2491 trivial. 0 not checked. [2018-07-24 12:17:45,858 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:17:45,858 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 12:17:45,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:45,867 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:17:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:46,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:17:47,213 WARN L169 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2018-07-24 12:17:48,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3340 backedges. 1802 proven. 6 refuted. 0 times theorem prover too weak. 1532 trivial. 0 not checked. [2018-07-24 12:17:48,294 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:17:52,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3340 backedges. 111 proven. 1733 refuted. 0 times theorem prover too weak. 1496 trivial. 0 not checked. [2018-07-24 12:17:52,137 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:17:52,137 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 12:17:52,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:52,153 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:17:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:53,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:17:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3340 backedges. 1561 proven. 6 refuted. 0 times theorem prover too weak. 1773 trivial. 0 not checked. [2018-07-24 12:17:55,163 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:17:55,357 WARN L169 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2018-07-24 12:17:55,737 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2018-07-24 12:18:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3340 backedges. 113 proven. 1731 refuted. 0 times theorem prover too weak. 1496 trivial. 0 not checked. [2018-07-24 12:18:02,025 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:18:02,025 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8, 7, 8] total 28 [2018-07-24 12:18:02,025 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:18:02,027 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 12:18:02,027 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 12:18:02,028 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2018-07-24 12:18:02,028 INFO L87 Difference]: Start difference. First operand 19859 states and 21182 transitions. Second operand 13 states. [2018-07-24 12:18:08,953 WARN L169 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2018-07-24 12:18:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:18:12,835 INFO L93 Difference]: Finished difference Result 45137 states and 48252 transitions. [2018-07-24 12:18:12,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-24 12:18:12,836 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 1288 [2018-07-24 12:18:12,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:18:12,904 INFO L225 Difference]: With dead ends: 45137 [2018-07-24 12:18:12,904 INFO L226 Difference]: Without dead ends: 25624 [2018-07-24 12:18:12,957 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5190 GetRequests, 5144 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=332, Invalid=1738, Unknown=0, NotChecked=0, Total=2070 [2018-07-24 12:18:12,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25624 states. [2018-07-24 12:18:13,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25624 to 22820. [2018-07-24 12:18:13,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22820 states. [2018-07-24 12:18:13,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22820 states to 22820 states and 24180 transitions. [2018-07-24 12:18:13,359 INFO L78 Accepts]: Start accepts. Automaton has 22820 states and 24180 transitions. Word has length 1288 [2018-07-24 12:18:13,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:18:13,360 INFO L471 AbstractCegarLoop]: Abstraction has 22820 states and 24180 transitions. [2018-07-24 12:18:13,360 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 12:18:13,360 INFO L276 IsEmpty]: Start isEmpty. Operand 22820 states and 24180 transitions. [2018-07-24 12:18:13,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1342 [2018-07-24 12:18:13,398 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:18:13,399 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:18:13,399 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:18:13,400 INFO L82 PathProgramCache]: Analyzing trace with hash -831930366, now seen corresponding path program 1 times [2018-07-24 12:18:13,400 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:18:13,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:13,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:13,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:13,401 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:18:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4123 backedges. 1137 proven. 87 refuted. 0 times theorem prover too weak. 2899 trivial. 0 not checked. [2018-07-24 12:18:15,916 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:18:15,916 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) [2018-07-24 12:18:15,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:15,930 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:18:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:16,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:18:17,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4123 backedges. 1937 proven. 2 refuted. 0 times theorem prover too weak. 2184 trivial. 0 not checked. [2018-07-24 12:18:17,527 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:18:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4123 backedges. 126 proven. 1855 refuted. 0 times theorem prover too weak. 2142 trivial. 0 not checked. [2018-07-24 12:18:20,085 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:18:20,085 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 12:18:20,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:20,117 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:18:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:21,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:18:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4123 backedges. 2775 proven. 2 refuted. 0 times theorem prover too weak. 1346 trivial. 0 not checked. [2018-07-24 12:18:22,002 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:18:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4123 backedges. 596 proven. 421 refuted. 0 times theorem prover too weak. 3106 trivial. 0 not checked. [2018-07-24 12:18:23,349 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:18:23,351 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 5, 5] total 24 [2018-07-24 12:18:23,351 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:18:23,353 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 12:18:23,353 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 12:18:23,353 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2018-07-24 12:18:23,353 INFO L87 Difference]: Start difference. First operand 22820 states and 24180 transitions. Second operand 14 states. [2018-07-24 12:18:37,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:18:37,275 INFO L93 Difference]: Finished difference Result 46174 states and 49000 transitions. [2018-07-24 12:18:37,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-24 12:18:37,276 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1341 [2018-07-24 12:18:37,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:18:37,331 INFO L225 Difference]: With dead ends: 46174 [2018-07-24 12:18:37,331 INFO L226 Difference]: Without dead ends: 20764 [2018-07-24 12:18:37,391 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5442 GetRequests, 5380 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=617, Invalid=3043, Unknown=0, NotChecked=0, Total=3660 [2018-07-24 12:18:37,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20764 states. [2018-07-24 12:18:37,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20764 to 19201. [2018-07-24 12:18:37,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19201 states. [2018-07-24 12:18:37,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19201 states to 19201 states and 20190 transitions. [2018-07-24 12:18:37,716 INFO L78 Accepts]: Start accepts. Automaton has 19201 states and 20190 transitions. Word has length 1341 [2018-07-24 12:18:37,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:18:37,717 INFO L471 AbstractCegarLoop]: Abstraction has 19201 states and 20190 transitions. [2018-07-24 12:18:37,717 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-24 12:18:37,717 INFO L276 IsEmpty]: Start isEmpty. Operand 19201 states and 20190 transitions. [2018-07-24 12:18:37,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1513 [2018-07-24 12:18:37,757 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:18:37,758 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2018-07-24 12:18:37,758 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:18:37,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1461899300, now seen corresponding path program 1 times [2018-07-24 12:18:37,759 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:18:37,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:37,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:37,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:37,760 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:18:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4043 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 3942 trivial. 0 not checked. [2018-07-24 12:18:39,383 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:18:39,384 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 12:18:39,384 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:18:39,385 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:18:39,385 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:18:39,385 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:18:39,385 INFO L87 Difference]: Start difference. First operand 19201 states and 20190 transitions. Second operand 4 states. [2018-07-24 12:18:41,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:18:41,781 INFO L93 Difference]: Finished difference Result 36018 states and 37950 transitions. [2018-07-24 12:18:41,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:18:41,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1512 [2018-07-24 12:18:41,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:18:41,813 INFO L225 Difference]: With dead ends: 36018 [2018-07-24 12:18:41,813 INFO L226 Difference]: Without dead ends: 14512 [2018-07-24 12:18:41,848 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:18:41,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14512 states. [2018-07-24 12:18:42,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14512 to 14196. [2018-07-24 12:18:42,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14196 states. [2018-07-24 12:18:42,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14196 states to 14196 states and 14858 transitions. [2018-07-24 12:18:42,076 INFO L78 Accepts]: Start accepts. Automaton has 14196 states and 14858 transitions. Word has length 1512 [2018-07-24 12:18:42,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:18:42,077 INFO L471 AbstractCegarLoop]: Abstraction has 14196 states and 14858 transitions. [2018-07-24 12:18:42,077 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:18:42,078 INFO L276 IsEmpty]: Start isEmpty. Operand 14196 states and 14858 transitions. [2018-07-24 12:18:42,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1735 [2018-07-24 12:18:42,122 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:18:42,123 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:18:42,124 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:18:42,124 INFO L82 PathProgramCache]: Analyzing trace with hash 931220528, now seen corresponding path program 1 times [2018-07-24 12:18:42,124 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:18:42,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:42,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:42,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:42,126 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:18:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:45,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4752 backedges. 939 proven. 594 refuted. 0 times theorem prover too weak. 3219 trivial. 0 not checked. [2018-07-24 12:18:45,325 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:18:45,325 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 12:18:45,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:45,336 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:18:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:45,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:18:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4752 backedges. 3319 proven. 2 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2018-07-24 12:18:47,318 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:18:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4752 backedges. 939 proven. 594 refuted. 0 times theorem prover too weak. 3219 trivial. 0 not checked. [2018-07-24 12:18:51,147 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:18:51,147 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:18:51,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:51,162 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:18:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:52,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:18:53,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4752 backedges. 3317 proven. 30 refuted. 0 times theorem prover too weak. 1405 trivial. 0 not checked. [2018-07-24 12:18:53,722 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:18:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4752 backedges. 939 proven. 594 refuted. 0 times theorem prover too weak. 3219 trivial. 0 not checked. [2018-07-24 12:18:57,636 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:18:57,638 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 7, 5] total 18 [2018-07-24 12:18:57,638 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:18:57,640 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-24 12:18:57,640 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-24 12:18:57,640 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2018-07-24 12:18:57,641 INFO L87 Difference]: Start difference. First operand 14196 states and 14858 transitions. Second operand 11 states. [2018-07-24 12:19:05,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:19:05,162 INFO L93 Difference]: Finished difference Result 26336 states and 28077 transitions. [2018-07-24 12:19:05,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-24 12:19:05,162 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 1734 [2018-07-24 12:19:05,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:19:05,194 INFO L225 Difference]: With dead ends: 26336 [2018-07-24 12:19:05,195 INFO L226 Difference]: Without dead ends: 14520 [2018-07-24 12:19:05,214 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6981 GetRequests, 6942 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=298, Invalid=1034, Unknown=0, NotChecked=0, Total=1332 [2018-07-24 12:19:05,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14520 states. [2018-07-24 12:19:05,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14520 to 13842. [2018-07-24 12:19:05,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13842 states. [2018-07-24 12:19:05,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13842 states to 13842 states and 14459 transitions. [2018-07-24 12:19:05,458 INFO L78 Accepts]: Start accepts. Automaton has 13842 states and 14459 transitions. Word has length 1734 [2018-07-24 12:19:05,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:19:05,460 INFO L471 AbstractCegarLoop]: Abstraction has 13842 states and 14459 transitions. [2018-07-24 12:19:05,460 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-24 12:19:05,460 INFO L276 IsEmpty]: Start isEmpty. Operand 13842 states and 14459 transitions. [2018-07-24 12:19:05,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1940 [2018-07-24 12:19:05,502 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:19:05,503 INFO L353 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:19:05,503 INFO L414 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:19:05,504 INFO L82 PathProgramCache]: Analyzing trace with hash 265650479, now seen corresponding path program 1 times [2018-07-24 12:19:05,504 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:19:05,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:05,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:05,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:05,505 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:19:05,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6461 backedges. 651 proven. 523 refuted. 0 times theorem prover too weak. 5287 trivial. 0 not checked. [2018-07-24 12:19:08,270 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:19:08,270 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:19:08,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:08,278 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:19:08,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:08,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:19:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6461 backedges. 4000 proven. 2 refuted. 0 times theorem prover too weak. 2459 trivial. 0 not checked. [2018-07-24 12:19:10,152 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:19:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6461 backedges. 651 proven. 523 refuted. 0 times theorem prover too weak. 5287 trivial. 0 not checked. [2018-07-24 12:19:12,534 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:19:12,534 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:19:12,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:12,551 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:19:13,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:13,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:19:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6461 backedges. 4000 proven. 2 refuted. 0 times theorem prover too weak. 2459 trivial. 0 not checked. [2018-07-24 12:19:15,135 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:19:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6461 backedges. 651 proven. 523 refuted. 0 times theorem prover too weak. 5287 trivial. 0 not checked. [2018-07-24 12:19:17,050 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:19:17,052 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 12:19:17,052 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:19:17,053 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:19:17,053 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:19:17,054 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:19:17,054 INFO L87 Difference]: Start difference. First operand 13842 states and 14459 transitions. Second operand 9 states. [2018-07-24 12:19:21,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:19:21,237 INFO L93 Difference]: Finished difference Result 24830 states and 25816 transitions. [2018-07-24 12:19:21,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:19:21,238 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1939 [2018-07-24 12:19:21,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:19:21,258 INFO L225 Difference]: With dead ends: 24830 [2018-07-24 12:19:21,258 INFO L226 Difference]: Without dead ends: 13030 [2018-07-24 12:19:21,272 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7772 GetRequests, 7753 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:19:21,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13030 states. [2018-07-24 12:19:21,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13030 to 11657. [2018-07-24 12:19:21,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11657 states. [2018-07-24 12:19:21,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11657 states to 11657 states and 11945 transitions. [2018-07-24 12:19:21,422 INFO L78 Accepts]: Start accepts. Automaton has 11657 states and 11945 transitions. Word has length 1939 [2018-07-24 12:19:21,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:19:21,424 INFO L471 AbstractCegarLoop]: Abstraction has 11657 states and 11945 transitions. [2018-07-24 12:19:21,424 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:19:21,424 INFO L276 IsEmpty]: Start isEmpty. Operand 11657 states and 11945 transitions. [2018-07-24 12:19:21,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1915 [2018-07-24 12:19:21,459 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:19:21,460 INFO L353 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:19:21,460 INFO L414 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:19:21,461 INFO L82 PathProgramCache]: Analyzing trace with hash 14944126, now seen corresponding path program 1 times [2018-07-24 12:19:21,461 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:19:21,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:21,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:21,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:21,462 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:19:21,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6260 backedges. 880 proven. 4346 refuted. 0 times theorem prover too weak. 1034 trivial. 0 not checked. [2018-07-24 12:19:31,435 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:19:31,435 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:19:31,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:31,443 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:19:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:32,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:19:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6260 backedges. 3874 proven. 2 refuted. 0 times theorem prover too weak. 2384 trivial. 0 not checked. [2018-07-24 12:19:33,375 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:19:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6260 backedges. 626 proven. 523 refuted. 0 times theorem prover too weak. 5111 trivial. 0 not checked. [2018-07-24 12:19:35,524 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:19:35,524 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 21 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 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:19:35,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:35,540 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:19:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:36,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:19:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6260 backedges. 3874 proven. 2 refuted. 0 times theorem prover too weak. 2384 trivial. 0 not checked. [2018-07-24 12:19:38,167 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:19:40,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6260 backedges. 626 proven. 523 refuted. 0 times theorem prover too weak. 5111 trivial. 0 not checked. [2018-07-24 12:19:40,261 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:19:40,262 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 5, 5, 5, 5] total 34 [2018-07-24 12:19:40,263 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:19:40,266 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-24 12:19:40,266 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-24 12:19:40,267 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2018-07-24 12:19:40,267 INFO L87 Difference]: Start difference. First operand 11657 states and 11945 transitions. Second operand 32 states. Received shutdown request... [2018-07-24 12:19:44,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:19:44,208 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:19:44,213 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:19:44,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:19:44 BoogieIcfgContainer [2018-07-24 12:19:44,214 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:19:44,214 INFO L168 Benchmark]: Toolchain (without parser) took 228321.84 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 2.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-07-24 12:19:44,215 INFO L168 Benchmark]: CDTParser took 0.21 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 12:19:44,215 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1216.20 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: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. [2018-07-24 12:19:44,216 INFO L168 Benchmark]: Boogie Procedure Inliner took 183.08 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: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-07-24 12:19:44,217 INFO L168 Benchmark]: Boogie Preprocessor took 512.99 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 861.4 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 81.6 MB. Max. memory is 7.1 GB. [2018-07-24 12:19:44,217 INFO L168 Benchmark]: RCFGBuilder took 6088.33 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: 296.2 MB). Peak memory consumption was 296.2 MB. Max. memory is 7.1 GB. [2018-07-24 12:19:44,219 INFO L168 Benchmark]: TraceAbstraction took 220316.87 ms. Allocated memory was 2.4 GB in the beginning and 4.2 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 2.7 GB in the end (delta: -697.1 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-07-24 12:19:44,222 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 1216.20 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: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 183.08 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: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 512.99 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 861.4 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 81.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 6088.33 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: 296.2 MB). Peak memory consumption was 296.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 220316.87 ms. Allocated memory was 2.4 GB in the beginning and 4.2 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 2.7 GB in the end (delta: -697.1 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 37]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 37). Cancelled while BasicCegarLoop was constructing difference of abstraction (11657states) and interpolant automaton (currently 8 states, 32 states before enhancement), while ReachableStatesComputation was computing reachable states (553 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 410 locations, 1 error locations. TIMEOUT Result, 220.2s OverallTime, 18 OverallIterations, 11 TraceHistogramMax, 112.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2469 SDtfs, 43005 SDslu, 3649 SDs, 0 SdLazy, 71257 SolverSat, 9723 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 88.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46987 GetRequests, 46597 SyntacticMatches, 50 SemanticMatches, 340 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2984 ImplicationChecksByTransitivity, 21.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22820occurred in iteration=13, 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: 4.4s AutomataMinimizationTime, 17 MinimizatonAttempts, 11160 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.2s SsaConstructionTime, 10.9s SatisfiabilityAnalysisTime, 72.0s InterpolantComputationTime, 38182 NumberOfCodeBlocks, 38182 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 61406 ConstructedInterpolants, 21 QuantifiedInterpolants, 283662987 SizeOfPredicates, 24 NumberOfNonLiveVariables, 30932 ConjunctsInSsa, 203 ConjunctsInUnsatCore, 58 InterpolantComputations, 12 PerfectInterpolantSequences, 141019/159431 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/Problem16_label06_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-19-44-234.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem16_label06_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-19-44-234.csv Completed graceful shutdown