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/Problem18_label59_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 15:06:34,239 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 15:06:34,242 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 15:06:34,262 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 15:06:34,262 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 15:06:34,264 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 15:06:34,265 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 15:06:34,267 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 15:06:34,268 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 15:06:34,269 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 15:06:34,270 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 15:06:34,271 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 15:06:34,271 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 15:06:34,272 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 15:06:34,274 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 15:06:34,274 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 15:06:34,275 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 15:06:34,277 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 15:06:34,279 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 15:06:34,280 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 15:06:34,281 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 15:06:34,282 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 15:06:34,285 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 15:06:34,285 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 15:06:34,285 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 15:06:34,286 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 15:06:34,287 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 15:06:34,288 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 15:06:34,288 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 15:06:34,291 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 15:06:34,291 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 15:06:34,292 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 15:06:34,293 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 15:06:34,294 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 15:06:34,295 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 15:06:34,295 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 15:06:34,297 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 15:06:34,313 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 15:06:34,313 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 15:06:34,314 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 15:06:34,314 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 15:06:34,314 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 15:06:34,314 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 15:06:34,315 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 15:06:34,315 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 15:06:34,315 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 15:06:34,315 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 15:06:34,315 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 15:06:34,316 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 15:06:34,316 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 15:06:34,317 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 15:06:34,317 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 15:06:34,317 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 15:06:34,317 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 15:06:34,317 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 15:06:34,318 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 15:06:34,318 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 15:06:34,318 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 15:06:34,318 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 15:06:34,318 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 15:06:34,319 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 15:06:34,319 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 15:06:34,319 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 15:06:34,319 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 15:06:34,319 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 15:06:34,320 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 15:06:34,320 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 15:06:34,320 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 15:06:34,320 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 15:06:34,320 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 15:06:34,376 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 15:06:34,390 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 15:06:34,397 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 15:06:34,399 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 15:06:34,399 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 15:06:34,401 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label59_true-unreach-call.c [2018-07-24 15:06:34,757 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e476a815/534879edc57940feb3dae1aca1e52c12/FLAGe8715bbfb [2018-07-24 15:06:35,187 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 15:06:35,188 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label59_true-unreach-call.c [2018-07-24 15:06:35,215 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e476a815/534879edc57940feb3dae1aca1e52c12/FLAGe8715bbfb [2018-07-24 15:06:35,232 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e476a815/534879edc57940feb3dae1aca1e52c12 [2018-07-24 15:06:35,245 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 15:06:35,247 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 15:06:35,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 15:06:35,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 15:06:35,256 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 15:06:35,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 03:06:35" (1/1) ... [2018-07-24 15:06:35,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47d9fee4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:06:35, skipping insertion in model container [2018-07-24 15:06:35,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 03:06:35" (1/1) ... [2018-07-24 15:06:35,590 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 15:06:36,423 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 15:06:36,444 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 15:06:36,989 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 15:06:37,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:06:37 WrapperNode [2018-07-24 15:06:37,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 15:06:37,152 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 15:06:37,152 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 15:06:37,153 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 15:06:37,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:06:37" (1/1) ... [2018-07-24 15:06:37,248 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:06:37" (1/1) ... [2018-07-24 15:06:37,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 15:06:37,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 15:06:37,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 15:06:37,391 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 15:06:37,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:06:37" (1/1) ... [2018-07-24 15:06:37,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:06:37" (1/1) ... [2018-07-24 15:06:37,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:06:37" (1/1) ... [2018-07-24 15:06:37,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:06:37" (1/1) ... [2018-07-24 15:06:37,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:06:37" (1/1) ... [2018-07-24 15:06:37,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:06:37" (1/1) ... [2018-07-24 15:06:38,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:06:37" (1/1) ... [2018-07-24 15:06:38,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 15:06:38,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 15:06:38,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 15:06:38,066 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 15:06:38,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:06:37" (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 15:06:38,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 15:06:38,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 15:06:38,149 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 15:06:38,149 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 15:06:38,150 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 15:06:38,150 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 15:06:38,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 15:06:38,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 15:06:38,150 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 15:06:38,151 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 15:06:38,151 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 15:06:38,151 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 15:06:45,752 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 15:06:45,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 03:06:45 BoogieIcfgContainer [2018-07-24 15:06:45,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 15:06:45,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 15:06:45,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 15:06:45,759 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 15:06:45,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 03:06:35" (1/3) ... [2018-07-24 15:06:45,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb7a67e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 03:06:45, skipping insertion in model container [2018-07-24 15:06:45,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:06:37" (2/3) ... [2018-07-24 15:06:45,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb7a67e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 03:06:45, skipping insertion in model container [2018-07-24 15:06:45,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 03:06:45" (3/3) ... [2018-07-24 15:06:45,769 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label59_true-unreach-call.c [2018-07-24 15:06:45,783 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 15:06:45,800 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 15:06:45,875 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 15:06:45,876 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 15:06:45,876 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 15:06:45,877 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 15:06:45,877 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 15:06:45,877 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 15:06:45,877 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 15:06:45,877 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 15:06:45,878 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 15:06:45,924 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states. [2018-07-24 15:06:45,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-07-24 15:06:45,934 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:06:45,935 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] [2018-07-24 15:06:45,936 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 15:06:45,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1799385508, now seen corresponding path program 1 times [2018-07-24 15:06:45,944 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:06:45,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:06:45,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:06:45,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:06:45,995 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:06:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:06:46,378 WARN L169 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 15:06:46,408 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 15:06:46,411 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 15:06:46,411 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 15:06:46,411 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:06:46,418 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 15:06:46,434 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 15:06:46,434 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 15:06:46,437 INFO L87 Difference]: Start difference. First operand 775 states. Second operand 3 states. [2018-07-24 15:06:53,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:06:53,447 INFO L93 Difference]: Finished difference Result 2251 states and 4322 transitions. [2018-07-24 15:06:53,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 15:06:53,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2018-07-24 15:06:53,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:06:53,491 INFO L225 Difference]: With dead ends: 2251 [2018-07-24 15:06:53,491 INFO L226 Difference]: Without dead ends: 1474 [2018-07-24 15:06:53,502 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 15:06:53,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2018-07-24 15:06:53,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1474. [2018-07-24 15:06:53,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1474 states. [2018-07-24 15:06:53,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2800 transitions. [2018-07-24 15:06:53,657 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2800 transitions. Word has length 44 [2018-07-24 15:06:53,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:06:53,658 INFO L471 AbstractCegarLoop]: Abstraction has 1474 states and 2800 transitions. [2018-07-24 15:06:53,658 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 15:06:53,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2800 transitions. [2018-07-24 15:06:53,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-07-24 15:06:53,668 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:06:53,671 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:06:53,672 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 15:06:53,673 INFO L82 PathProgramCache]: Analyzing trace with hash 863748970, now seen corresponding path program 1 times [2018-07-24 15:06:53,673 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:06:53,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:06:53,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:06:53,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:06:53,675 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:06:53,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:06:54,073 WARN L169 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 15:06:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:06:54,306 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 15:06:54,306 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-24 15:06:54,306 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:06:54,308 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 15:06:54,309 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 15:06:54,309 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-24 15:06:54,310 INFO L87 Difference]: Start difference. First operand 1474 states and 2800 transitions. Second operand 5 states. [2018-07-24 15:07:02,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:07:02,945 INFO L93 Difference]: Finished difference Result 4419 states and 8483 transitions. [2018-07-24 15:07:02,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 15:07:02,947 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 114 [2018-07-24 15:07:02,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:07:02,969 INFO L225 Difference]: With dead ends: 4419 [2018-07-24 15:07:02,969 INFO L226 Difference]: Without dead ends: 2951 [2018-07-24 15:07:02,975 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-07-24 15:07:02,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2018-07-24 15:07:03,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2925. [2018-07-24 15:07:03,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2925 states. [2018-07-24 15:07:03,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2925 states to 2925 states and 5205 transitions. [2018-07-24 15:07:03,080 INFO L78 Accepts]: Start accepts. Automaton has 2925 states and 5205 transitions. Word has length 114 [2018-07-24 15:07:03,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:07:03,080 INFO L471 AbstractCegarLoop]: Abstraction has 2925 states and 5205 transitions. [2018-07-24 15:07:03,081 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 15:07:03,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2925 states and 5205 transitions. [2018-07-24 15:07:03,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-07-24 15:07:03,089 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:07:03,089 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:07:03,089 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 15:07:03,090 INFO L82 PathProgramCache]: Analyzing trace with hash 78461553, now seen corresponding path program 1 times [2018-07-24 15:07:03,090 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:07:03,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:07:03,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:07:03,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:07:03,095 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:07:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:07:03,386 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:07:03,386 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 15:07:03,387 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 15:07:03,387 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:07:03,387 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 15:07:03,388 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 15:07:03,388 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-07-24 15:07:03,388 INFO L87 Difference]: Start difference. First operand 2925 states and 5205 transitions. Second operand 6 states. [2018-07-24 15:07:16,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:07:16,492 INFO L93 Difference]: Finished difference Result 11942 states and 22535 transitions. [2018-07-24 15:07:16,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-24 15:07:16,500 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2018-07-24 15:07:16,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:07:16,568 INFO L225 Difference]: With dead ends: 11942 [2018-07-24 15:07:16,569 INFO L226 Difference]: Without dead ends: 9023 [2018-07-24 15:07:16,601 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-07-24 15:07:16,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9023 states. [2018-07-24 15:07:16,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9023 to 8933. [2018-07-24 15:07:16,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8933 states. [2018-07-24 15:07:16,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8933 states to 8933 states and 13432 transitions. [2018-07-24 15:07:16,938 INFO L78 Accepts]: Start accepts. Automaton has 8933 states and 13432 transitions. Word has length 115 [2018-07-24 15:07:16,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:07:16,939 INFO L471 AbstractCegarLoop]: Abstraction has 8933 states and 13432 transitions. [2018-07-24 15:07:16,939 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 15:07:16,939 INFO L276 IsEmpty]: Start isEmpty. Operand 8933 states and 13432 transitions. [2018-07-24 15:07:16,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-07-24 15:07:16,947 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:07:16,948 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:07:16,948 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 15:07:16,949 INFO L82 PathProgramCache]: Analyzing trace with hash -285087526, now seen corresponding path program 1 times [2018-07-24 15:07:16,949 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:07:16,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:07:16,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:07:16,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:07:16,951 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:07:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:07:17,205 WARN L169 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 15:07:17,397 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:07:17,398 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 15:07:17,398 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 15:07:17,398 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:07:17,398 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 15:07:17,399 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 15:07:17,399 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 15:07:17,399 INFO L87 Difference]: Start difference. First operand 8933 states and 13432 transitions. Second operand 6 states. [2018-07-24 15:07:25,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:07:25,189 INFO L93 Difference]: Finished difference Result 22462 states and 35325 transitions. [2018-07-24 15:07:25,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 15:07:25,190 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2018-07-24 15:07:25,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:07:25,271 INFO L225 Difference]: With dead ends: 22462 [2018-07-24 15:07:25,271 INFO L226 Difference]: Without dead ends: 13535 [2018-07-24 15:07:25,310 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 15:07:25,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13535 states. [2018-07-24 15:07:25,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13535 to 13423. [2018-07-24 15:07:25,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13423 states. [2018-07-24 15:07:25,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13423 states to 13423 states and 17907 transitions. [2018-07-24 15:07:25,671 INFO L78 Accepts]: Start accepts. Automaton has 13423 states and 17907 transitions. Word has length 122 [2018-07-24 15:07:25,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:07:25,672 INFO L471 AbstractCegarLoop]: Abstraction has 13423 states and 17907 transitions. [2018-07-24 15:07:25,672 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 15:07:25,672 INFO L276 IsEmpty]: Start isEmpty. Operand 13423 states and 17907 transitions. [2018-07-24 15:07:25,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-07-24 15:07:25,674 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:07:25,674 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:07:25,675 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 15:07:25,675 INFO L82 PathProgramCache]: Analyzing trace with hash 514496114, now seen corresponding path program 1 times [2018-07-24 15:07:25,675 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:07:25,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:07:25,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:07:25,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:07:25,676 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:07:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:07:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:07:25,809 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 15:07:25,809 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 15:07:25,809 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:07:25,810 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 15:07:25,810 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 15:07:25,810 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 15:07:25,811 INFO L87 Difference]: Start difference. First operand 13423 states and 17907 transitions. Second operand 3 states. [2018-07-24 15:07:30,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:07:30,146 INFO L93 Difference]: Finished difference Result 37594 states and 51903 transitions. [2018-07-24 15:07:30,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 15:07:30,148 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2018-07-24 15:07:30,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:07:30,258 INFO L225 Difference]: With dead ends: 37594 [2018-07-24 15:07:30,259 INFO L226 Difference]: Without dead ends: 24177 [2018-07-24 15:07:30,331 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 15:07:30,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24177 states. [2018-07-24 15:07:30,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24177 to 24177. [2018-07-24 15:07:30,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24177 states. [2018-07-24 15:07:30,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24177 states to 24177 states and 30073 transitions. [2018-07-24 15:07:30,858 INFO L78 Accepts]: Start accepts. Automaton has 24177 states and 30073 transitions. Word has length 142 [2018-07-24 15:07:30,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:07:30,859 INFO L471 AbstractCegarLoop]: Abstraction has 24177 states and 30073 transitions. [2018-07-24 15:07:30,859 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 15:07:30,859 INFO L276 IsEmpty]: Start isEmpty. Operand 24177 states and 30073 transitions. [2018-07-24 15:07:30,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-07-24 15:07:30,870 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:07:30,871 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 15:07:30,871 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 15:07:30,871 INFO L82 PathProgramCache]: Analyzing trace with hash 677527991, now seen corresponding path program 1 times [2018-07-24 15:07:30,871 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:07:30,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:07:30,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:07:30,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:07:30,873 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:07:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:07:31,284 WARN L169 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-07-24 15:07:31,631 WARN L169 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 15:07:32,132 WARN L169 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2018-07-24 15:07:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 74 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 15:07:32,424 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:07:32,424 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 15:07:32,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:07:32,445 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:07:32,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:07:32,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:07:33,261 WARN L169 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 15:07:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-07-24 15:07:33,363 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:07:33,849 WARN L169 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-07-24 15:07:34,048 WARN L169 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2018-07-24 15:07:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 74 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 15:07:35,327 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 15:07:35,328 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2018-07-24 15:07:35,328 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:07:35,329 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 15:07:35,329 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 15:07:35,329 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-07-24 15:07:35,329 INFO L87 Difference]: Start difference. First operand 24177 states and 30073 transitions. Second operand 5 states. [2018-07-24 15:07:35,580 WARN L169 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-07-24 15:07:46,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:07:46,279 INFO L93 Difference]: Finished difference Result 54434 states and 67648 transitions. [2018-07-24 15:07:46,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 15:07:46,280 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 221 [2018-07-24 15:07:46,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:07:46,426 INFO L225 Difference]: With dead ends: 54434 [2018-07-24 15:07:46,426 INFO L226 Difference]: Without dead ends: 30263 [2018-07-24 15:07:46,510 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 437 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-07-24 15:07:46,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30263 states. [2018-07-24 15:07:47,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30263 to 30142. [2018-07-24 15:07:47,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30142 states. [2018-07-24 15:07:47,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30142 states to 30142 states and 36893 transitions. [2018-07-24 15:07:47,259 INFO L78 Accepts]: Start accepts. Automaton has 30142 states and 36893 transitions. Word has length 221 [2018-07-24 15:07:47,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:07:47,261 INFO L471 AbstractCegarLoop]: Abstraction has 30142 states and 36893 transitions. [2018-07-24 15:07:47,261 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 15:07:47,261 INFO L276 IsEmpty]: Start isEmpty. Operand 30142 states and 36893 transitions. [2018-07-24 15:07:47,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-07-24 15:07:47,277 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:07:47,278 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:07:47,278 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 15:07:47,278 INFO L82 PathProgramCache]: Analyzing trace with hash 713547873, now seen corresponding path program 1 times [2018-07-24 15:07:47,278 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:07:47,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:07:47,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:07:47,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:07:47,280 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:07:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:07:47,999 WARN L169 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 15:07:48,279 WARN L169 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-07-24 15:07:48,627 WARN L169 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-07-24 15:07:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 212 proven. 69 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-07-24 15:07:49,174 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:07:49,174 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 15:07:49,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:07:49,182 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:07:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:07:49,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:07:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2018-07-24 15:07:49,694 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:07:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 111 proven. 158 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-07-24 15:07:50,372 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 15:07:50,373 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 5] total 17 [2018-07-24 15:07:50,373 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:07:50,374 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 15:07:50,374 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 15:07:50,374 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2018-07-24 15:07:50,375 INFO L87 Difference]: Start difference. First operand 30142 states and 36893 transitions. Second operand 5 states. [2018-07-24 15:07:58,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:07:58,696 INFO L93 Difference]: Finished difference Result 67552 states and 82405 transitions. [2018-07-24 15:07:58,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 15:07:58,696 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 319 [2018-07-24 15:07:58,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:07:58,811 INFO L225 Difference]: With dead ends: 67552 [2018-07-24 15:07:58,812 INFO L226 Difference]: Without dead ends: 37416 [2018-07-24 15:07:58,866 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 633 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2018-07-24 15:07:58,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37416 states. [2018-07-24 15:07:59,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37416 to 37126. [2018-07-24 15:07:59,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37126 states. [2018-07-24 15:07:59,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37126 states to 37126 states and 44386 transitions. [2018-07-24 15:07:59,494 INFO L78 Accepts]: Start accepts. Automaton has 37126 states and 44386 transitions. Word has length 319 [2018-07-24 15:07:59,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:07:59,494 INFO L471 AbstractCegarLoop]: Abstraction has 37126 states and 44386 transitions. [2018-07-24 15:07:59,494 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 15:07:59,494 INFO L276 IsEmpty]: Start isEmpty. Operand 37126 states and 44386 transitions. [2018-07-24 15:07:59,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2018-07-24 15:07:59,506 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:07:59,506 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:07:59,506 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 15:07:59,507 INFO L82 PathProgramCache]: Analyzing trace with hash -604394262, now seen corresponding path program 1 times [2018-07-24 15:07:59,507 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:07:59,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:07:59,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:07:59,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:07:59,508 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:07:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:08:00,304 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 170 proven. 183 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 15:08:00,304 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:08:00,305 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 15:08:00,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:08:00,313 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:08:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:08:00,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:08:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 318 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-07-24 15:08:00,700 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:08:00,908 WARN L169 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-07-24 15:08:01,161 WARN L169 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2018-07-24 15:08:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 221 proven. 69 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-07-24 15:08:01,648 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:08:01,648 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 15:08:01,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:08:01,667 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:08:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:08:01,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:08:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 267 proven. 53 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-07-24 15:08:02,475 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:08:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 121 proven. 232 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 15:08:03,270 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 15:08:03,271 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 5, 8, 8] total 27 [2018-07-24 15:08:03,271 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 15:08:03,272 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-24 15:08:03,272 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-24 15:08:03,272 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2018-07-24 15:08:03,272 INFO L87 Difference]: Start difference. First operand 37126 states and 44386 transitions. Second operand 16 states. [2018-07-24 15:08:34,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:08:34,980 INFO L93 Difference]: Finished difference Result 84304 states and 99983 transitions. [2018-07-24 15:08:34,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-07-24 15:08:34,981 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 408 [2018-07-24 15:08:34,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:08:35,125 INFO L225 Difference]: With dead ends: 84304 [2018-07-24 15:08:35,126 INFO L226 Difference]: Without dead ends: 43523 [2018-07-24 15:08:35,206 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1750 GetRequests, 1668 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2078 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1316, Invalid=5164, Unknown=0, NotChecked=0, Total=6480 [2018-07-24 15:08:35,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43523 states. [2018-07-24 15:08:36,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43523 to 38991. [2018-07-24 15:08:36,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38991 states. [2018-07-24 15:08:36,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38991 states to 38991 states and 44494 transitions. [2018-07-24 15:08:36,089 INFO L78 Accepts]: Start accepts. Automaton has 38991 states and 44494 transitions. Word has length 408 [2018-07-24 15:08:36,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:08:36,090 INFO L471 AbstractCegarLoop]: Abstraction has 38991 states and 44494 transitions. [2018-07-24 15:08:36,090 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-24 15:08:36,090 INFO L276 IsEmpty]: Start isEmpty. Operand 38991 states and 44494 transitions. [2018-07-24 15:08:36,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2018-07-24 15:08:36,100 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:08:36,100 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:08:36,101 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 15:08:36,101 INFO L82 PathProgramCache]: Analyzing trace with hash -312622227, now seen corresponding path program 1 times [2018-07-24 15:08:36,101 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:08:36,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:08:36,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:08:36,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:08:36,102 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:08:36,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:08:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 75 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:08:36,821 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:08:36,821 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 15:08:36,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:08:36,831 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:08:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:08:36,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:08:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:08:37,165 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:08:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:08:37,364 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:08:37,366 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 15:08:37,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:08:37,387 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:08:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:08:37,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:08:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-07-24 15:08:38,123 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:08:39,146 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-07-24 15:08:39,148 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-07-24 15:08:39,149 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5, 5, 5] total 15 [2018-07-24 15:08:39,149 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:08:39,150 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 15:08:39,150 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 15:08:39,150 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2018-07-24 15:08:39,150 INFO L87 Difference]: Start difference. First operand 38991 states and 44494 transitions. Second operand 5 states. [2018-07-24 15:08:44,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:08:44,549 INFO L93 Difference]: Finished difference Result 82343 states and 95760 transitions. [2018-07-24 15:08:44,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 15:08:44,549 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 425 [2018-07-24 15:08:44,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:08:44,687 INFO L225 Difference]: With dead ends: 82343 [2018-07-24 15:08:44,687 INFO L226 Difference]: Without dead ends: 43358 [2018-07-24 15:08:44,753 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1712 GetRequests, 1692 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2018-07-24 15:08:44,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43358 states. [2018-07-24 15:08:45,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43358 to 43345. [2018-07-24 15:08:45,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43345 states. [2018-07-24 15:08:45,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43345 states to 43345 states and 50042 transitions. [2018-07-24 15:08:45,392 INFO L78 Accepts]: Start accepts. Automaton has 43345 states and 50042 transitions. Word has length 425 [2018-07-24 15:08:45,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:08:45,393 INFO L471 AbstractCegarLoop]: Abstraction has 43345 states and 50042 transitions. [2018-07-24 15:08:45,393 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 15:08:45,393 INFO L276 IsEmpty]: Start isEmpty. Operand 43345 states and 50042 transitions. [2018-07-24 15:08:45,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2018-07-24 15:08:45,404 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:08:45,405 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:08:45,405 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 15:08:45,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1479679200, now seen corresponding path program 1 times [2018-07-24 15:08:45,405 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:08:45,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:08:45,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:08:45,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:08:45,407 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:08:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:08:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 78 proven. 199 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-07-24 15:08:46,467 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:08:46,467 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 15:08:46,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:08:46,474 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:08:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:08:46,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:08:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2018-07-24 15:08:46,776 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:08:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2018-07-24 15:08:47,526 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 15:08:47,526 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [13] total 14 [2018-07-24 15:08:47,529 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:08:47,530 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 15:08:47,530 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 15:08:47,531 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2018-07-24 15:08:47,531 INFO L87 Difference]: Start difference. First operand 43345 states and 50042 transitions. Second operand 3 states. [2018-07-24 15:08:50,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:08:50,883 INFO L93 Difference]: Finished difference Result 85979 states and 99354 transitions. [2018-07-24 15:08:50,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 15:08:50,884 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 516 [2018-07-24 15:08:50,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:08:50,984 INFO L225 Difference]: With dead ends: 85979 [2018-07-24 15:08:50,984 INFO L226 Difference]: Without dead ends: 42640 [2018-07-24 15:08:51,071 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1049 GetRequests, 1034 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2018-07-24 15:08:51,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42640 states. [2018-07-24 15:08:51,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42640 to 39793. [2018-07-24 15:08:51,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39793 states. [2018-07-24 15:08:51,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39793 states to 39793 states and 44641 transitions. [2018-07-24 15:08:51,660 INFO L78 Accepts]: Start accepts. Automaton has 39793 states and 44641 transitions. Word has length 516 [2018-07-24 15:08:51,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:08:51,661 INFO L471 AbstractCegarLoop]: Abstraction has 39793 states and 44641 transitions. [2018-07-24 15:08:51,662 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 15:08:51,662 INFO L276 IsEmpty]: Start isEmpty. Operand 39793 states and 44641 transitions. [2018-07-24 15:08:51,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2018-07-24 15:08:51,673 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:08:51,673 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:08:51,673 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 15:08:51,674 INFO L82 PathProgramCache]: Analyzing trace with hash -2076193897, now seen corresponding path program 1 times [2018-07-24 15:08:51,674 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:08:51,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:08:51,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:08:51,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:08:51,675 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:08:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:08:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 121 proven. 132 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-07-24 15:08:52,309 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:08:52,309 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:08:52,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:08:52,317 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:08:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:08:52,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:08:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2018-07-24 15:08:52,708 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:08:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 111 proven. 167 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-07-24 15:08:53,653 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 15:08:53,653 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 12 [2018-07-24 15:08:53,654 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:08:53,654 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 15:08:53,655 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 15:08:53,655 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-07-24 15:08:53,655 INFO L87 Difference]: Start difference. First operand 39793 states and 44641 transitions. Second operand 5 states. [2018-07-24 15:09:00,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:09:00,603 INFO L93 Difference]: Finished difference Result 97500 states and 110652 transitions. [2018-07-24 15:09:00,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 15:09:00,603 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 529 [2018-07-24 15:09:00,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:09:00,720 INFO L225 Difference]: With dead ends: 97500 [2018-07-24 15:09:00,720 INFO L226 Difference]: Without dead ends: 57713 [2018-07-24 15:09:00,775 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1072 GetRequests, 1052 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2018-07-24 15:09:00,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57713 states. [2018-07-24 15:09:01,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57713 to 56935. [2018-07-24 15:09:01,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56935 states. [2018-07-24 15:09:01,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56935 states to 56935 states and 63145 transitions. [2018-07-24 15:09:01,551 INFO L78 Accepts]: Start accepts. Automaton has 56935 states and 63145 transitions. Word has length 529 [2018-07-24 15:09:01,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:09:01,551 INFO L471 AbstractCegarLoop]: Abstraction has 56935 states and 63145 transitions. [2018-07-24 15:09:01,552 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 15:09:01,552 INFO L276 IsEmpty]: Start isEmpty. Operand 56935 states and 63145 transitions. [2018-07-24 15:09:01,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1058 [2018-07-24 15:09:01,581 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:09:01,582 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 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 15:09:01,582 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:09:01,583 INFO L82 PathProgramCache]: Analyzing trace with hash 278016461, now seen corresponding path program 1 times [2018-07-24 15:09:01,583 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:09:01,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:09:01,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:09:01,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:09:01,584 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:09:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:09:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 160 proven. 645 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-07-24 15:09:06,456 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:09:06,457 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 15:09:06,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:09:06,466 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:09:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:09:06,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:09:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 538 proven. 2 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2018-07-24 15:09:07,574 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:09:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 376 proven. 69 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2018-07-24 15:09:08,563 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:09:08,563 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 15:09:08,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:09:08,579 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:09:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:09:09,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:09:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 322 proven. 4 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2018-07-24 15:09:10,485 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:09:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 164 proven. 195 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2018-07-24 15:09:13,651 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 15:09:13,652 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 5, 5, 5, 5] total 27 [2018-07-24 15:09:13,652 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 15:09:13,655 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-24 15:09:13,655 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-24 15:09:13,656 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2018-07-24 15:09:13,656 INFO L87 Difference]: Start difference. First operand 56935 states and 63145 transitions. Second operand 21 states. [2018-07-24 15:09:30,687 WARN L169 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2018-07-24 15:09:42,740 WARN L169 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2018-07-24 15:09:53,858 WARN L169 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2018-07-24 15:09:58,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:09:58,845 INFO L93 Difference]: Finished difference Result 123509 states and 142317 transitions. [2018-07-24 15:09:58,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-07-24 15:09:58,846 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1057 [2018-07-24 15:09:58,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:09:58,996 INFO L225 Difference]: With dead ends: 123509 [2018-07-24 15:09:58,996 INFO L226 Difference]: Without dead ends: 67283 [2018-07-24 15:09:59,076 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4428 GetRequests, 4294 SyntacticMatches, 6 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5699 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2564, Invalid=14206, Unknown=0, NotChecked=0, Total=16770 [2018-07-24 15:09:59,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67283 states. [2018-07-24 15:09:59,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67283 to 64616. [2018-07-24 15:09:59,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64616 states. [2018-07-24 15:09:59,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64616 states to 64616 states and 70464 transitions. [2018-07-24 15:09:59,920 INFO L78 Accepts]: Start accepts. Automaton has 64616 states and 70464 transitions. Word has length 1057 [2018-07-24 15:09:59,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:09:59,921 INFO L471 AbstractCegarLoop]: Abstraction has 64616 states and 70464 transitions. [2018-07-24 15:09:59,921 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-24 15:09:59,921 INFO L276 IsEmpty]: Start isEmpty. Operand 64616 states and 70464 transitions. [2018-07-24 15:09:59,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1149 [2018-07-24 15:09:59,950 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:09:59,951 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 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 15:09:59,951 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:09:59,951 INFO L82 PathProgramCache]: Analyzing trace with hash -2097939372, now seen corresponding path program 1 times [2018-07-24 15:09:59,951 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:09:59,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:09:59,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:09:59,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:09:59,953 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:10:00,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:10:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 509 proven. 69 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2018-07-24 15:10:01,567 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:10:01,567 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:10:01,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:10:01,577 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:10:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:10:01,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:10:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 736 proven. 2 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked. [2018-07-24 15:10:02,912 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:10:03,173 WARN L169 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2018-07-24 15:10:04,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 509 proven. 69 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2018-07-24 15:10:04,899 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:10:04,899 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 15:10:04,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:10:04,915 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:10:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:10:05,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:10:10,178 WARN L169 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 45 DAG size of output: 19 [2018-07-24 15:10:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 732 proven. 6 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked. [2018-07-24 15:10:11,351 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:10:11,581 WARN L169 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-07-24 15:10:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 221 proven. 550 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2018-07-24 15:10:14,182 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 15:10:14,182 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 8, 8] total 21 [2018-07-24 15:10:14,183 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 15:10:14,185 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-24 15:10:14,185 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-24 15:10:14,186 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2018-07-24 15:10:14,186 INFO L87 Difference]: Start difference. First operand 64616 states and 70464 transitions. Second operand 8 states. Received shutdown request... [2018-07-24 15:10:26,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-24 15:10:26,757 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 15:10:26,764 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 15:10:26,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 03:10:26 BoogieIcfgContainer [2018-07-24 15:10:26,764 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 15:10:26,765 INFO L168 Benchmark]: Toolchain (without parser) took 231519.11 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-07-24 15:10:26,766 INFO L168 Benchmark]: CDTParser took 0.58 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 15:10:26,766 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1903.06 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 179.7 MB). Peak memory consumption was 179.7 MB. Max. memory is 7.1 GB. [2018-07-24 15:10:26,767 INFO L168 Benchmark]: Boogie Procedure Inliner took 238.40 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-07-24 15:10:26,768 INFO L168 Benchmark]: Boogie Preprocessor took 674.94 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 870.3 MB). Free memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 85.8 MB. Max. memory is 7.1 GB. [2018-07-24 15:10:26,768 INFO L168 Benchmark]: RCFGBuilder took 7688.83 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 1.8 GB in the end (delta: 533.9 MB). Peak memory consumption was 533.9 MB. Max. memory is 7.1 GB. [2018-07-24 15:10:26,769 INFO L168 Benchmark]: TraceAbstraction took 221008.35 ms. Allocated memory was 2.4 GB in the beginning and 4.0 GB in the end (delta: 1.6 GB). Free memory was 1.8 GB in the beginning and 2.6 GB in the end (delta: -815.3 MB). Peak memory consumption was 804.7 MB. Max. memory is 7.1 GB. [2018-07-24 15:10:26,774 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58 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 1903.06 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 179.7 MB). Peak memory consumption was 179.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 238.40 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 674.94 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 870.3 MB). Free memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 85.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7688.83 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 1.8 GB in the end (delta: 533.9 MB). Peak memory consumption was 533.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 221008.35 ms. Allocated memory was 2.4 GB in the beginning and 4.0 GB in the end (delta: 1.6 GB). Free memory was 1.8 GB in the beginning and 2.6 GB in the end (delta: -815.3 MB). Peak memory consumption was 804.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 120]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 120). Cancelled while BasicCegarLoop was constructing difference of abstraction (64616states) and interpolant automaton (currently 27 states, 8 states before enhancement), while ReachableStatesComputation was computing reachable states (48779 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 775 locations, 1 error locations. TIMEOUT Result, 220.8s OverallTime, 13 OverallIterations, 6 TraceHistogramMax, 167.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3814 SDtfs, 57180 SDslu, 4232 SDs, 0 SdLazy, 101403 SolverSat, 16815 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 128.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15790 GetRequests, 15412 SyntacticMatches, 35 SemanticMatches, 343 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8420 ImplicationChecksByTransitivity, 24.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64616occurred in iteration=12, 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: 6.5s AutomataMinimizationTime, 12 MinimizatonAttempts, 11476 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 4.0s SatisfiabilityAnalysisTime, 36.1s InterpolantComputationTime, 12821 NumberOfCodeBlocks, 12821 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 20445 ConstructedInterpolants, 7 QuantifiedInterpolants, 83805923 SizeOfPredicates, 35 NumberOfNonLiveVariables, 10776 ConjunctsInSsa, 191 ConjunctsInUnsatCore, 37 InterpolantComputations, 11 PerfectInterpolantSequences, 13887/16970 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/Problem18_label59_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_15-10-26-787.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem18_label59_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_15-10-26-787.csv Completed graceful shutdown