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/Problem12_label36_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 14:11:42,997 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 14:11:43,002 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 14:11:43,018 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 14:11:43,019 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 14:11:43,020 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 14:11:43,021 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 14:11:43,023 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 14:11:43,025 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 14:11:43,026 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 14:11:43,027 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 14:11:43,027 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 14:11:43,028 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 14:11:43,029 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 14:11:43,030 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 14:11:43,031 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 14:11:43,032 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 14:11:43,035 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 14:11:43,037 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 14:11:43,042 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 14:11:43,043 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 14:11:43,046 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 14:11:43,051 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 14:11:43,053 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 14:11:43,054 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 14:11:43,055 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 14:11:43,056 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 14:11:43,059 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 14:11:43,060 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 14:11:43,061 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 14:11:43,061 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 14:11:43,062 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 14:11:43,062 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 14:11:43,065 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 14:11:43,068 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 14:11:43,069 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 14:11:43,069 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 14:11:43,095 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 14:11:43,095 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 14:11:43,096 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 14:11:43,097 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 14:11:43,097 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 14:11:43,097 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 14:11:43,097 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 14:11:43,098 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 14:11:43,098 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 14:11:43,098 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 14:11:43,098 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 14:11:43,099 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 14:11:43,100 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 14:11:43,100 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 14:11:43,100 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 14:11:43,102 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 14:11:43,102 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 14:11:43,102 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 14:11:43,102 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 14:11:43,103 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 14:11:43,103 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 14:11:43,103 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 14:11:43,104 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 14:11:43,104 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:11:43,104 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 14:11:43,104 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 14:11:43,105 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 14:11:43,105 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 14:11:43,105 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 14:11:43,105 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 14:11:43,105 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 14:11:43,106 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 14:11:43,106 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 14:11:43,171 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 14:11:43,188 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 14:11:43,194 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 14:11:43,196 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 14:11:43,197 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 14:11:43,198 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label36_true-unreach-call.c [2018-07-24 14:11:43,550 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a11b78ce/19a6906fd66247d0a9177e74506726e4/FLAG7877e0fb5 [2018-07-24 14:11:44,051 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 14:11:44,052 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label36_true-unreach-call.c [2018-07-24 14:11:44,090 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a11b78ce/19a6906fd66247d0a9177e74506726e4/FLAG7877e0fb5 [2018-07-24 14:11:44,113 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a11b78ce/19a6906fd66247d0a9177e74506726e4 [2018-07-24 14:11:44,126 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 14:11:44,128 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 14:11:44,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 14:11:44,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 14:11:44,138 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 14:11:44,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:11:44" (1/1) ... [2018-07-24 14:11:44,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41a59828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:11:44, skipping insertion in model container [2018-07-24 14:11:44,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:11:44" (1/1) ... [2018-07-24 14:11:44,509 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 14:11:45,631 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:11:45,647 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 14:11:46,315 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:11:46,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:11:46 WrapperNode [2018-07-24 14:11:46,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 14:11:46,591 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 14:11:46,592 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 14:11:46,592 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 14:11:46,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:11:46" (1/1) ... [2018-07-24 14:11:46,690 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:11:46" (1/1) ... [2018-07-24 14:11:46,824 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 14:11:46,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 14:11:46,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 14:11:46,825 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 14:11:47,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:11:46" (1/1) ... [2018-07-24 14:11:47,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:11:46" (1/1) ... [2018-07-24 14:11:47,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:11:46" (1/1) ... [2018-07-24 14:11:47,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:11:46" (1/1) ... [2018-07-24 14:11:47,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:11:46" (1/1) ... [2018-07-24 14:11:47,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:11:46" (1/1) ... [2018-07-24 14:11:47,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:11:46" (1/1) ... [2018-07-24 14:11:47,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 14:11:47,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 14:11:47,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 14:11:47,864 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 14:11:47,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:11:46" (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 14:11:47,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 14:11:47,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 14:11:47,948 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 14:11:47,948 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 14:11:47,949 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output3 [2018-07-24 14:11:47,949 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output3 [2018-07-24 14:11:47,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 14:11:47,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 14:11:47,949 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4 [2018-07-24 14:11:47,950 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4 [2018-07-24 14:11:47,950 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 14:11:47,950 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 14:11:47,950 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-07-24 14:11:47,951 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-07-24 14:12:02,019 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 14:12:02,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:12:02 BoogieIcfgContainer [2018-07-24 14:12:02,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 14:12:02,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 14:12:02,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 14:12:02,027 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 14:12:02,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 02:11:44" (1/3) ... [2018-07-24 14:12:02,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b273ca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:12:02, skipping insertion in model container [2018-07-24 14:12:02,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:11:46" (2/3) ... [2018-07-24 14:12:02,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b273ca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:12:02, skipping insertion in model container [2018-07-24 14:12:02,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:12:02" (3/3) ... [2018-07-24 14:12:02,032 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label36_true-unreach-call.c [2018-07-24 14:12:02,042 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 14:12:02,053 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 14:12:02,133 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 14:12:02,133 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 14:12:02,134 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 14:12:02,134 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 14:12:02,134 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 14:12:02,134 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 14:12:02,134 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 14:12:02,134 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 14:12:02,135 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 14:12:02,176 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states. [2018-07-24 14:12:02,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-07-24 14:12:02,193 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:12:02,194 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:12:02,195 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:12:02,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1489180692, now seen corresponding path program 1 times [2018-07-24 14:12:02,202 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:12:02,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:12:02,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:12:02,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:12:02,257 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:12:02,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:12:02,766 WARN L169 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-07-24 14:12:02,879 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 14:12:02,882 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:12:02,882 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:12:02,882 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:12:02,888 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:12:02,903 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:12:02,904 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:12:02,907 INFO L87 Difference]: Start difference. First operand 840 states. Second operand 4 states. [2018-07-24 14:12:14,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:12:14,623 INFO L93 Difference]: Finished difference Result 3218 states and 6239 transitions. [2018-07-24 14:12:14,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:12:14,624 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2018-07-24 14:12:14,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:12:14,665 INFO L225 Difference]: With dead ends: 3218 [2018-07-24 14:12:14,665 INFO L226 Difference]: Without dead ends: 2372 [2018-07-24 14:12:14,677 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:12:14,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2372 states. [2018-07-24 14:12:14,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2372 to 2372. [2018-07-24 14:12:14,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2372 states. [2018-07-24 14:12:14,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 4546 transitions. [2018-07-24 14:12:14,873 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 4546 transitions. Word has length 64 [2018-07-24 14:12:14,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:12:14,874 INFO L471 AbstractCegarLoop]: Abstraction has 2372 states and 4546 transitions. [2018-07-24 14:12:14,874 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:12:14,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 4546 transitions. [2018-07-24 14:12:14,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-07-24 14:12:14,892 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:12:14,893 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 14:12:14,893 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:12:14,896 INFO L82 PathProgramCache]: Analyzing trace with hash -600570014, now seen corresponding path program 1 times [2018-07-24 14:12:14,897 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:12:14,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:12:14,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:12:14,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:12:14,898 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:12:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:12:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:12:15,305 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:12:15,305 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 14:12:15,305 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:12:15,307 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:12:15,307 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:12:15,308 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:12:15,308 INFO L87 Difference]: Start difference. First operand 2372 states and 4546 transitions. Second operand 6 states. [2018-07-24 14:12:27,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:12:27,629 INFO L93 Difference]: Finished difference Result 7150 states and 13881 transitions. [2018-07-24 14:12:27,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:12:27,637 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 178 [2018-07-24 14:12:27,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:12:27,677 INFO L225 Difference]: With dead ends: 7150 [2018-07-24 14:12:27,677 INFO L226 Difference]: Without dead ends: 4784 [2018-07-24 14:12:27,686 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:12:27,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4784 states. [2018-07-24 14:12:27,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4784 to 4739. [2018-07-24 14:12:27,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4739 states. [2018-07-24 14:12:27,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4739 states to 4739 states and 8782 transitions. [2018-07-24 14:12:27,853 INFO L78 Accepts]: Start accepts. Automaton has 4739 states and 8782 transitions. Word has length 178 [2018-07-24 14:12:27,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:12:27,856 INFO L471 AbstractCegarLoop]: Abstraction has 4739 states and 8782 transitions. [2018-07-24 14:12:27,856 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:12:27,856 INFO L276 IsEmpty]: Start isEmpty. Operand 4739 states and 8782 transitions. [2018-07-24 14:12:27,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-07-24 14:12:27,862 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:12:27,862 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:12:27,862 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:12:27,863 INFO L82 PathProgramCache]: Analyzing trace with hash 966392405, now seen corresponding path program 1 times [2018-07-24 14:12:27,863 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:12:27,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:12:27,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:12:27,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:12:27,864 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:12:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:12:28,119 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:12:28,119 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:12:28,119 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-24 14:12:28,120 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:12:28,120 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:12:28,121 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:12:28,121 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-24 14:12:28,121 INFO L87 Difference]: Start difference. First operand 4739 states and 8782 transitions. Second operand 5 states. [2018-07-24 14:12:52,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:12:52,740 INFO L93 Difference]: Finished difference Result 15900 states and 29777 transitions. [2018-07-24 14:12:52,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 14:12:52,743 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 205 [2018-07-24 14:12:52,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:12:52,808 INFO L225 Difference]: With dead ends: 15900 [2018-07-24 14:12:52,808 INFO L226 Difference]: Without dead ends: 11167 [2018-07-24 14:12:52,837 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-07-24 14:12:52,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11167 states. [2018-07-24 14:12:53,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11167 to 11065. [2018-07-24 14:12:53,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11065 states. [2018-07-24 14:12:53,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11065 states to 11065 states and 18195 transitions. [2018-07-24 14:12:53,192 INFO L78 Accepts]: Start accepts. Automaton has 11065 states and 18195 transitions. Word has length 205 [2018-07-24 14:12:53,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:12:53,192 INFO L471 AbstractCegarLoop]: Abstraction has 11065 states and 18195 transitions. [2018-07-24 14:12:53,193 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:12:53,193 INFO L276 IsEmpty]: Start isEmpty. Operand 11065 states and 18195 transitions. [2018-07-24 14:12:53,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-07-24 14:12:53,199 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:12:53,199 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:12:53,200 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:12:53,200 INFO L82 PathProgramCache]: Analyzing trace with hash 3518149, now seen corresponding path program 1 times [2018-07-24 14:12:53,200 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:12:53,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:12:53,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:12:53,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:12:53,204 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:12:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:12:53,663 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:12:53,663 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:12:53,664 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:12:53,664 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:12:53,664 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:12:53,665 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:12:53,665 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:12:53,665 INFO L87 Difference]: Start difference. First operand 11065 states and 18195 transitions. Second operand 4 states. [2018-07-24 14:13:03,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:13:03,967 INFO L93 Difference]: Finished difference Result 29059 states and 48148 transitions. [2018-07-24 14:13:03,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:13:03,973 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 213 [2018-07-24 14:13:03,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:13:04,051 INFO L225 Difference]: With dead ends: 29059 [2018-07-24 14:13:04,051 INFO L226 Difference]: Without dead ends: 18000 [2018-07-24 14:13:04,271 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 14:13:04,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18000 states. [2018-07-24 14:13:04,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18000 to 16442. [2018-07-24 14:13:04,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16442 states. [2018-07-24 14:13:04,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16442 states to 16442 states and 24348 transitions. [2018-07-24 14:13:04,643 INFO L78 Accepts]: Start accepts. Automaton has 16442 states and 24348 transitions. Word has length 213 [2018-07-24 14:13:04,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:13:04,644 INFO L471 AbstractCegarLoop]: Abstraction has 16442 states and 24348 transitions. [2018-07-24 14:13:04,644 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:13:04,644 INFO L276 IsEmpty]: Start isEmpty. Operand 16442 states and 24348 transitions. [2018-07-24 14:13:04,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-07-24 14:13:04,665 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:13:04,666 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:13:04,666 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:13:04,666 INFO L82 PathProgramCache]: Analyzing trace with hash 531831352, now seen corresponding path program 1 times [2018-07-24 14:13:04,666 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:13:04,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:13:04,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:13:04,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:13:04,668 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:13:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:13:04,968 WARN L169 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 14:13:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 114 proven. 84 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:13:05,363 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:13:05,363 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 14:13:05,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:13:05,373 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:13:05,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:13:05,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:13:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-07-24 14:13:06,150 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:13:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 114 proven. 84 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:13:06,931 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:13:06,931 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-07-24 14:13:06,931 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:13:06,932 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:13:06,933 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:13:06,933 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-07-24 14:13:06,933 INFO L87 Difference]: Start difference. First operand 16442 states and 24348 transitions. Second operand 5 states. [2018-07-24 14:13:16,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:13:16,337 INFO L93 Difference]: Finished difference Result 39643 states and 60452 transitions. [2018-07-24 14:13:16,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 14:13:16,338 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 332 [2018-07-24 14:13:16,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:13:16,455 INFO L225 Difference]: With dead ends: 39643 [2018-07-24 14:13:16,455 INFO L226 Difference]: Without dead ends: 23207 [2018-07-24 14:13:16,564 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 658 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2018-07-24 14:13:16,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23207 states. [2018-07-24 14:13:17,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23207 to 23064. [2018-07-24 14:13:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23064 states. [2018-07-24 14:13:17,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23064 states to 23064 states and 33247 transitions. [2018-07-24 14:13:17,091 INFO L78 Accepts]: Start accepts. Automaton has 23064 states and 33247 transitions. Word has length 332 [2018-07-24 14:13:17,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:13:17,091 INFO L471 AbstractCegarLoop]: Abstraction has 23064 states and 33247 transitions. [2018-07-24 14:13:17,091 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:13:17,091 INFO L276 IsEmpty]: Start isEmpty. Operand 23064 states and 33247 transitions. [2018-07-24 14:13:17,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2018-07-24 14:13:17,114 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:13:17,114 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:13:17,115 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:13:17,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1941929417, now seen corresponding path program 1 times [2018-07-24 14:13:17,115 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:13:17,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:13:17,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:13:17,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:13:17,117 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:13:17,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:13:17,449 WARN L169 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 14:13:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 114 proven. 95 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:13:17,949 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:13:17,949 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 14:13:17,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:13:17,965 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:13:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:13:18,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:13:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-07-24 14:13:18,518 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:13:18,750 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 114 proven. 95 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:13:18,772 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:13:18,772 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-07-24 14:13:18,772 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:13:18,773 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:13:18,773 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:13:18,773 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-07-24 14:13:18,774 INFO L87 Difference]: Start difference. First operand 23064 states and 33247 transitions. Second operand 5 states. [2018-07-24 14:13:28,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:13:28,466 INFO L93 Difference]: Finished difference Result 47194 states and 69532 transitions. [2018-07-24 14:13:28,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 14:13:28,472 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 343 [2018-07-24 14:13:28,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:13:28,590 INFO L225 Difference]: With dead ends: 47194 [2018-07-24 14:13:28,591 INFO L226 Difference]: Without dead ends: 24136 [2018-07-24 14:13:28,627 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 680 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2018-07-24 14:13:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24136 states. [2018-07-24 14:13:29,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24136 to 23207. [2018-07-24 14:13:29,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23207 states. [2018-07-24 14:13:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23207 states to 23207 states and 28858 transitions. [2018-07-24 14:13:29,069 INFO L78 Accepts]: Start accepts. Automaton has 23207 states and 28858 transitions. Word has length 343 [2018-07-24 14:13:29,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:13:29,070 INFO L471 AbstractCegarLoop]: Abstraction has 23207 states and 28858 transitions. [2018-07-24 14:13:29,070 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:13:29,070 INFO L276 IsEmpty]: Start isEmpty. Operand 23207 states and 28858 transitions. [2018-07-24 14:13:29,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2018-07-24 14:13:29,095 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:13:29,095 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:13:29,096 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:13:29,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1043718771, now seen corresponding path program 1 times [2018-07-24 14:13:29,096 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:13:29,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:13:29,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:13:29,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:13:29,097 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:13:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:13:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 117 proven. 137 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-24 14:13:29,910 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:13:29,910 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 14:13:29,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:13:29,920 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:13:30,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:13:30,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:13:30,539 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2018-07-24 14:13:30,539 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:13:30,807 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2018-07-24 14:13:30,828 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 14:13:30,829 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2018-07-24 14:13:30,829 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:13:30,829 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:13:30,829 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:13:30,830 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:13:30,830 INFO L87 Difference]: Start difference. First operand 23207 states and 28858 transitions. Second operand 5 states. [2018-07-24 14:13:39,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:13:39,077 INFO L93 Difference]: Finished difference Result 66243 states and 84245 transitions. [2018-07-24 14:13:39,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 14:13:39,086 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 389 [2018-07-24 14:13:39,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:13:39,241 INFO L225 Difference]: With dead ends: 66243 [2018-07-24 14:13:39,241 INFO L226 Difference]: Without dead ends: 43042 [2018-07-24 14:13:39,291 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 787 GetRequests, 775 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:13:39,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43042 states. [2018-07-24 14:13:40,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43042 to 42065. [2018-07-24 14:13:40,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42065 states. [2018-07-24 14:13:40,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42065 states to 42065 states and 50632 transitions. [2018-07-24 14:13:40,351 INFO L78 Accepts]: Start accepts. Automaton has 42065 states and 50632 transitions. Word has length 389 [2018-07-24 14:13:40,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:13:40,352 INFO L471 AbstractCegarLoop]: Abstraction has 42065 states and 50632 transitions. [2018-07-24 14:13:40,352 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:13:40,352 INFO L276 IsEmpty]: Start isEmpty. Operand 42065 states and 50632 transitions. [2018-07-24 14:13:40,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2018-07-24 14:13:40,395 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:13:40,396 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:13:40,396 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:13:40,396 INFO L82 PathProgramCache]: Analyzing trace with hash -90527652, now seen corresponding path program 1 times [2018-07-24 14:13:40,396 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:13:40,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:13:40,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:13:40,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:13:40,398 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:13:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:13:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2018-07-24 14:13:41,219 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:13:41,219 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:13:41,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:13:41,228 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:13:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:13:41,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:13:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-07-24 14:13:41,832 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:13:42,063 WARN L169 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2018-07-24 14:13:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 114 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:13:43,062 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:13:43,063 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2018-07-24 14:13:43,063 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:13:43,063 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:13:43,064 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:13:43,064 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:13:43,064 INFO L87 Difference]: Start difference. First operand 42065 states and 50632 transitions. Second operand 5 states. [2018-07-24 14:13:53,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:13:53,472 INFO L93 Difference]: Finished difference Result 95799 states and 115888 transitions. [2018-07-24 14:13:53,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 14:13:53,473 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 556 [2018-07-24 14:13:53,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:13:53,607 INFO L225 Difference]: With dead ends: 95799 [2018-07-24 14:13:53,608 INFO L226 Difference]: Without dead ends: 53740 [2018-07-24 14:13:53,673 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1128 GetRequests, 1112 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-07-24 14:13:53,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53740 states. [2018-07-24 14:13:54,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53740 to 51912. [2018-07-24 14:13:54,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51912 states. [2018-07-24 14:13:54,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51912 states to 51912 states and 61846 transitions. [2018-07-24 14:13:54,817 INFO L78 Accepts]: Start accepts. Automaton has 51912 states and 61846 transitions. Word has length 556 [2018-07-24 14:13:54,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:13:54,817 INFO L471 AbstractCegarLoop]: Abstraction has 51912 states and 61846 transitions. [2018-07-24 14:13:54,817 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:13:54,818 INFO L276 IsEmpty]: Start isEmpty. Operand 51912 states and 61846 transitions. [2018-07-24 14:13:54,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2018-07-24 14:13:54,874 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:13:54,875 INFO L353 BasicCegarLoop]: trace histogram [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, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:13:54,875 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:13:54,875 INFO L82 PathProgramCache]: Analyzing trace with hash 964072088, now seen corresponding path program 1 times [2018-07-24 14:13:54,875 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:13:54,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:13:54,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:13:54,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:13:54,876 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:13:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:13:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 326 proven. 176 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2018-07-24 14:13:55,378 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:13:55,378 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 14:13:55,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:13:55,387 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:13:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:13:55,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:13:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 633 proven. 2 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-07-24 14:13:55,927 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:13:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 326 proven. 176 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2018-07-24 14:13:56,248 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:13:56,248 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:13:56,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:13:56,264 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:13:56,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:13:56,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:13:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 633 proven. 2 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-07-24 14:13:57,226 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:13:57,477 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 326 proven. 176 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2018-07-24 14:13:57,479 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:13:57,480 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 14 [2018-07-24 14:13:57,480 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:13:57,482 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:13:57,482 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:13:57,482 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-07-24 14:13:57,483 INFO L87 Difference]: Start difference. First operand 51912 states and 61846 transitions. Second operand 9 states. [2018-07-24 14:14:18,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:14:18,049 INFO L93 Difference]: Finished difference Result 152870 states and 194786 transitions. [2018-07-24 14:14:18,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-24 14:14:18,050 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 586 [2018-07-24 14:14:18,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:14:18,518 INFO L225 Difference]: With dead ends: 152870 [2018-07-24 14:14:18,518 INFO L226 Difference]: Without dead ends: 100964 [2018-07-24 14:14:18,696 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2360 GetRequests, 2340 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2018-07-24 14:14:18,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100964 states. [2018-07-24 14:14:20,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100964 to 99524. [2018-07-24 14:14:20,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99524 states. [2018-07-24 14:14:20,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99524 states to 99524 states and 121263 transitions. [2018-07-24 14:14:20,614 INFO L78 Accepts]: Start accepts. Automaton has 99524 states and 121263 transitions. Word has length 586 [2018-07-24 14:14:20,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:14:20,615 INFO L471 AbstractCegarLoop]: Abstraction has 99524 states and 121263 transitions. [2018-07-24 14:14:20,615 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:14:20,615 INFO L276 IsEmpty]: Start isEmpty. Operand 99524 states and 121263 transitions. [2018-07-24 14:14:20,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2018-07-24 14:14:20,706 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:14:20,707 INFO L353 BasicCegarLoop]: trace histogram [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, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:14:20,707 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:14:20,708 INFO L82 PathProgramCache]: Analyzing trace with hash 2033000784, now seen corresponding path program 1 times [2018-07-24 14:14:20,708 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:14:20,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:14:20,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:14:20,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:14:20,709 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:14:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:14:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 436 proven. 106 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2018-07-24 14:14:21,635 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:14:21,635 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:14:21,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:14:21,642 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:14:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:14:21,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:14:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 715 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-07-24 14:14:22,031 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:14:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 436 proven. 106 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2018-07-24 14:14:22,326 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:14:22,326 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 9 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 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:14:22,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:14:22,347 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:14:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:14:22,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:14:23,849 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 715 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-07-24 14:14:23,849 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:14:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 436 proven. 106 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2018-07-24 14:14:24,280 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:14:24,281 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-07-24 14:14:24,282 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:14:24,283 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:14:24,283 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:14:24,283 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2018-07-24 14:14:24,284 INFO L87 Difference]: Start difference. First operand 99524 states and 121263 transitions. Second operand 9 states. [2018-07-24 14:15:03,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:15:03,737 INFO L93 Difference]: Finished difference Result 272112 states and 400572 transitions. [2018-07-24 14:15:03,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-24 14:15:03,738 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 590 [2018-07-24 14:15:03,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:15:04,626 INFO L225 Difference]: With dead ends: 272112 [2018-07-24 14:15:04,626 INFO L226 Difference]: Without dead ends: 173362 [2018-07-24 14:15:05,087 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2431 GetRequests, 2381 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=435, Invalid=2115, Unknown=0, NotChecked=0, Total=2550 [2018-07-24 14:15:06,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173362 states. [2018-07-24 14:15:08,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173362 to 166233. [2018-07-24 14:15:08,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166233 states. [2018-07-24 14:15:08,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166233 states to 166233 states and 209102 transitions. [2018-07-24 14:15:08,802 INFO L78 Accepts]: Start accepts. Automaton has 166233 states and 209102 transitions. Word has length 590 [2018-07-24 14:15:08,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:15:08,803 INFO L471 AbstractCegarLoop]: Abstraction has 166233 states and 209102 transitions. [2018-07-24 14:15:08,803 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:15:08,803 INFO L276 IsEmpty]: Start isEmpty. Operand 166233 states and 209102 transitions. [2018-07-24 14:15:08,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2018-07-24 14:15:08,912 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:15:08,912 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:15:08,913 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:15:08,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1859618501, now seen corresponding path program 1 times [2018-07-24 14:15:08,913 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:15:08,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:15:08,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:15:08,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:15:08,914 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:15:09,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:15:10,469 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 412 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-07-24 14:15:10,470 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:15:10,470 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:15:10,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:15:10,478 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:15:10,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:15:10,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:15:10,932 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 412 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-07-24 14:15:10,932 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:15:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 412 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-07-24 14:15:11,525 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:15:11,525 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:15:11,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:15:11,543 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:15:12,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:15:12,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:15:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 412 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-07-24 14:15:13,172 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:15:13,615 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 412 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (11)] Exception during sending of exit command (exit): Broken pipe [2018-07-24 14:15:13,618 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:15:13,619 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 12 [2018-07-24 14:15:13,619 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:15:13,620 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:15:13,620 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:15:13,620 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:15:13,621 INFO L87 Difference]: Start difference. First operand 166233 states and 209102 transitions. Second operand 6 states. [2018-07-24 14:15:35,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:15:35,007 INFO L93 Difference]: Finished difference Result 399098 states and 522198 transitions. [2018-07-24 14:15:35,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 14:15:35,008 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 601 [2018-07-24 14:15:35,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:15:36,209 INFO L225 Difference]: With dead ends: 399098 [2018-07-24 14:15:36,209 INFO L226 Difference]: Without dead ends: 233639 Received shutdown request... [2018-07-24 14:15:38,004 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2419 GetRequests, 2399 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2018-07-24 14:15:38,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233639 states. [2018-07-24 14:15:38,111 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 14:15:38,114 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 14:15:38,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 02:15:38 BoogieIcfgContainer [2018-07-24 14:15:38,115 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 14:15:38,115 INFO L168 Benchmark]: Toolchain (without parser) took 233989.25 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -684.0 MB). Peak memory consumption was 2.8 GB. Max. memory is 7.1 GB. [2018-07-24 14:15:38,117 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 14:15:38,117 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2461.95 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. [2018-07-24 14:15:38,118 INFO L168 Benchmark]: Boogie Procedure Inliner took 233.05 ms. Allocated memory is still 1.5 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2018-07-24 14:15:38,119 INFO L168 Benchmark]: Boogie Preprocessor took 1038.63 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 924.3 MB). Free memory was 1.1 GB in the beginning and 2.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 128.0 MB. Max. memory is 7.1 GB. [2018-07-24 14:15:38,120 INFO L168 Benchmark]: RCFGBuilder took 14157.18 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 157.3 MB). Free memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: -156.0 MB). Peak memory consumption was 742.4 MB. Max. memory is 7.1 GB. [2018-07-24 14:15:38,122 INFO L168 Benchmark]: TraceAbstraction took 216092.10 ms. Allocated memory was 2.6 GB in the beginning and 3.5 GB in the end (delta: 891.3 MB). Free memory was 2.5 GB in the beginning and 2.1 GB in the end (delta: 374.1 MB). Peak memory consumption was 2.8 GB. Max. memory is 7.1 GB. [2018-07-24 14:15:38,129 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2461.95 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 233.05 ms. Allocated memory is still 1.5 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 1038.63 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 924.3 MB). Free memory was 1.1 GB in the beginning and 2.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 128.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 14157.18 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 157.3 MB). Free memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: -156.0 MB). Peak memory consumption was 742.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 216092.10 ms. Allocated memory was 2.6 GB in the beginning and 3.5 GB in the end (delta: 891.3 MB). Free memory was 2.5 GB in the beginning and 2.1 GB in the end (delta: 374.1 MB). Peak memory consumption was 2.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 183]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 183). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 840 locations, 1 error locations. TIMEOUT Result, 215.9s OverallTime, 11 OverallIterations, 5 TraceHistogramMax, 184.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2545 SDtfs, 41124 SDslu, 2445 SDs, 0 SdLazy, 79555 SolverSat, 19537 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 145.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10524 GetRequests, 10356 SyntacticMatches, 24 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 7.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166233occurred in iteration=10, 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: 9.9s AutomataMinimizationTime, 11 MinimizatonAttempts, 14151 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 14.6s InterpolantComputationTime, 9231 NumberOfCodeBlocks, 9231 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 14374 ConstructedInterpolants, 0 QuantifiedInterpolants, 20268935 SizeOfPredicates, 13 NumberOfNonLiveVariables, 7798 ConjunctsInSsa, 73 ConjunctsInUnsatCore, 31 InterpolantComputations, 9 PerfectInterpolantSequences, 12485/14096 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/Problem12_label36_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_14-15-38-143.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem12_label36_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_14-15-38-143.csv Completed graceful shutdown