java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label30_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 12:37:16,378 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 12:37:16,380 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 12:37:16,392 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 12:37:16,392 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 12:37:16,393 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 12:37:16,395 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 12:37:16,396 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 12:37:16,398 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 12:37:16,399 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 12:37:16,400 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 12:37:16,400 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 12:37:16,401 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 12:37:16,402 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 12:37:16,403 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 12:37:16,404 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 12:37:16,405 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 12:37:16,407 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 12:37:16,412 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 12:37:16,419 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 12:37:16,420 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 12:37:16,421 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 12:37:16,423 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 12:37:16,424 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 12:37:16,424 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 12:37:16,425 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 12:37:16,426 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 12:37:16,426 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 12:37:16,427 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 12:37:16,428 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 12:37:16,428 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 12:37:16,429 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 12:37:16,429 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 12:37:16,429 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 12:37:16,431 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 12:37:16,432 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 12:37:16,432 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-10 12:37:16,447 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 12:37:16,447 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 12:37:16,448 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 12:37:16,448 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 12:37:16,448 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 12:37:16,448 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 12:37:16,449 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 12:37:16,449 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 12:37:16,449 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 12:37:16,449 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 12:37:16,449 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 12:37:16,450 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 12:37:16,450 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 12:37:16,451 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 12:37:16,451 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 12:37:16,451 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 12:37:16,451 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 12:37:16,451 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 12:37:16,451 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 12:37:16,452 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 12:37:16,452 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 12:37:16,452 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 12:37:16,452 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 12:37:16,452 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 12:37:16,453 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 12:37:16,453 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 12:37:16,453 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 12:37:16,453 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 12:37:16,453 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 12:37:16,453 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 12:37:16,454 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 12:37:16,454 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 12:37:16,454 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 12:37:16,505 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 12:37:16,518 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 12:37:16,522 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 12:37:16,524 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 12:37:16,524 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 12:37:16,525 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label30_true-unreach-call.c [2018-09-10 12:37:16,860 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdc9a933f/882c2893e13641fe9277fc222fe1b2f7/FLAGe3b09865c [2018-09-10 12:37:17,313 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 12:37:17,314 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label30_true-unreach-call.c [2018-09-10 12:37:17,342 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdc9a933f/882c2893e13641fe9277fc222fe1b2f7/FLAGe3b09865c [2018-09-10 12:37:17,359 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdc9a933f/882c2893e13641fe9277fc222fe1b2f7 [2018-09-10 12:37:17,370 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 12:37:17,374 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 12:37:17,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 12:37:17,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 12:37:17,385 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 12:37:17,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:37:17" (1/1) ... [2018-09-10 12:37:17,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76b82260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:37:17, skipping insertion in model container [2018-09-10 12:37:17,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:37:17" (1/1) ... [2018-09-10 12:37:17,706 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 12:37:18,520 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:37:18,542 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 12:37:19,317 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:37:19,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:37:19 WrapperNode [2018-09-10 12:37:19,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 12:37:19,482 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 12:37:19,482 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 12:37:19,482 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 12:37:19,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:37:19" (1/1) ... [2018-09-10 12:37:19,562 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:37:19" (1/1) ... [2018-09-10 12:37:19,676 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 12:37:19,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 12:37:19,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 12:37:19,677 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 12:37:20,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:37:19" (1/1) ... [2018-09-10 12:37:20,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:37:19" (1/1) ... [2018-09-10 12:37:20,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:37:19" (1/1) ... [2018-09-10 12:37:20,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:37:19" (1/1) ... [2018-09-10 12:37:20,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:37:19" (1/1) ... [2018-09-10 12:37:20,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:37:19" (1/1) ... [2018-09-10 12:37:20,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:37:19" (1/1) ... [2018-09-10 12:37:20,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 12:37:20,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 12:37:20,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 12:37:20,301 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 12:37:20,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:37:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 12:37:20,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 12:37:20,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 12:37:20,373 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-09-10 12:37:20,373 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-09-10 12:37:20,373 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 [2018-09-10 12:37:20,373 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 [2018-09-10 12:37:20,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 12:37:20,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 12:37:20,374 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 12:37:20,374 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 12:37:20,374 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 [2018-09-10 12:37:20,374 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 [2018-09-10 12:37:28,680 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 12:37:28,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:37:28 BoogieIcfgContainer [2018-09-10 12:37:28,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 12:37:28,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 12:37:28,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 12:37:28,686 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 12:37:28,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 12:37:17" (1/3) ... [2018-09-10 12:37:28,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@291a215c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:37:28, skipping insertion in model container [2018-09-10 12:37:28,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:37:19" (2/3) ... [2018-09-10 12:37:28,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@291a215c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:37:28, skipping insertion in model container [2018-09-10 12:37:28,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:37:28" (3/3) ... [2018-09-10 12:37:28,690 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label30_true-unreach-call.c [2018-09-10 12:37:28,700 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 12:37:28,710 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 12:37:28,773 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 12:37:28,774 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 12:37:28,774 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 12:37:28,775 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 12:37:28,775 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 12:37:28,775 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 12:37:28,775 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 12:37:28,775 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 12:37:28,775 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 12:37:28,816 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states. [2018-09-10 12:37:28,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-10 12:37:28,825 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:37:28,827 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:37:28,828 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:37:28,834 INFO L82 PathProgramCache]: Analyzing trace with hash 326634324, now seen corresponding path program 1 times [2018-09-10 12:37:28,836 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:37:28,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:37:28,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:37:28,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:37:28,886 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:37:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:37:29,312 WARN L175 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:37:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:37:29,374 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:37:29,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 12:37:29,377 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:37:29,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:37:29,397 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:37:29,398 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:37:29,400 INFO L87 Difference]: Start difference. First operand 775 states. Second operand 3 states. [2018-09-10 12:37:36,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:37:36,023 INFO L93 Difference]: Finished difference Result 2251 states and 4322 transitions. [2018-09-10 12:37:36,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:37:36,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2018-09-10 12:37:36,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:37:36,060 INFO L225 Difference]: With dead ends: 2251 [2018-09-10 12:37:36,060 INFO L226 Difference]: Without dead ends: 1474 [2018-09-10 12:37:36,076 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:37:36,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2018-09-10 12:37:36,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1474. [2018-09-10 12:37:36,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1474 states. [2018-09-10 12:37:36,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2721 transitions. [2018-09-10 12:37:36,224 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2721 transitions. Word has length 50 [2018-09-10 12:37:36,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:37:36,225 INFO L480 AbstractCegarLoop]: Abstraction has 1474 states and 2721 transitions. [2018-09-10 12:37:36,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:37:36,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2721 transitions. [2018-09-10 12:37:36,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-10 12:37:36,233 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:37:36,233 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:37:36,234 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:37:36,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1081897506, now seen corresponding path program 1 times [2018-09-10 12:37:36,234 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:37:36,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:37:36,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:37:36,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:37:36,236 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:37:36,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:37:36,551 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:37:36,551 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:37:36,551 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 12:37:36,552 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:37:36,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:37:36,555 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:37:36,555 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:37:36,555 INFO L87 Difference]: Start difference. First operand 1474 states and 2721 transitions. Second operand 6 states. [2018-09-10 12:37:53,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:37:53,402 INFO L93 Difference]: Finished difference Result 5907 states and 11160 transitions. [2018-09-10 12:37:53,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-10 12:37:53,402 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2018-09-10 12:37:53,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:37:53,434 INFO L225 Difference]: With dead ends: 5907 [2018-09-10 12:37:53,435 INFO L226 Difference]: Without dead ends: 4439 [2018-09-10 12:37:53,449 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-09-10 12:37:53,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4439 states. [2018-09-10 12:37:53,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4439 to 4389. [2018-09-10 12:37:53,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4389 states. [2018-09-10 12:37:53,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4389 states to 4389 states and 7149 transitions. [2018-09-10 12:37:53,622 INFO L78 Accepts]: Start accepts. Automaton has 4389 states and 7149 transitions. Word has length 122 [2018-09-10 12:37:53,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:37:53,622 INFO L480 AbstractCegarLoop]: Abstraction has 4389 states and 7149 transitions. [2018-09-10 12:37:53,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:37:53,623 INFO L276 IsEmpty]: Start isEmpty. Operand 4389 states and 7149 transitions. [2018-09-10 12:37:53,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-10 12:37:53,627 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:37:53,628 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:37:53,628 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:37:53,628 INFO L82 PathProgramCache]: Analyzing trace with hash 2068920665, now seen corresponding path program 1 times [2018-09-10 12:37:53,628 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:37:53,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:37:53,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:37:53,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:37:53,630 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:37:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:37:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:37:53,903 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:37:53,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 12:37:53,904 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:37:53,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:37:53,905 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:37:53,905 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:37:53,905 INFO L87 Difference]: Start difference. First operand 4389 states and 7149 transitions. Second operand 6 states. [2018-09-10 12:38:03,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:38:03,810 INFO L93 Difference]: Finished difference Result 17449 states and 29632 transitions. [2018-09-10 12:38:03,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:38:03,813 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2018-09-10 12:38:03,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:38:03,890 INFO L225 Difference]: With dead ends: 17449 [2018-09-10 12:38:03,891 INFO L226 Difference]: Without dead ends: 13066 [2018-09-10 12:38:03,924 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-10 12:38:03,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13066 states. [2018-09-10 12:38:04,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13066 to 12965. [2018-09-10 12:38:04,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12965 states. [2018-09-10 12:38:04,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12965 states to 12965 states and 20063 transitions. [2018-09-10 12:38:04,278 INFO L78 Accepts]: Start accepts. Automaton has 12965 states and 20063 transitions. Word has length 145 [2018-09-10 12:38:04,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:38:04,278 INFO L480 AbstractCegarLoop]: Abstraction has 12965 states and 20063 transitions. [2018-09-10 12:38:04,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:38:04,279 INFO L276 IsEmpty]: Start isEmpty. Operand 12965 states and 20063 transitions. [2018-09-10 12:38:04,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-10 12:38:04,284 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:38:04,284 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:38:04,284 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:38:04,285 INFO L82 PathProgramCache]: Analyzing trace with hash 708099528, now seen corresponding path program 1 times [2018-09-10 12:38:04,285 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:38:04,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:04,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:04,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:04,286 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:38:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:04,583 WARN L175 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:38:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 86 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:38:04,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:38:04,666 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:38:04,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:04,677 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:38:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:04,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:38:05,134 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-09-10 12:38:05,134 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:38:05,348 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-10 12:38:06,122 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 86 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:38:06,145 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:38:06,145 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2018-09-10 12:38:06,145 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:38:06,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:38:06,146 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:38:06,146 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-09-10 12:38:06,147 INFO L87 Difference]: Start difference. First operand 12965 states and 20063 transitions. Second operand 5 states. [2018-09-10 12:38:13,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:38:13,929 INFO L93 Difference]: Finished difference Result 34755 states and 57144 transitions. [2018-09-10 12:38:13,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:38:13,933 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 210 [2018-09-10 12:38:13,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:38:14,075 INFO L225 Difference]: With dead ends: 34755 [2018-09-10 12:38:14,076 INFO L226 Difference]: Without dead ends: 21796 [2018-09-10 12:38:14,132 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 415 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2018-09-10 12:38:14,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21796 states. [2018-09-10 12:38:14,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21796 to 21665. [2018-09-10 12:38:14,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21665 states. [2018-09-10 12:38:14,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21665 states to 21665 states and 30240 transitions. [2018-09-10 12:38:14,725 INFO L78 Accepts]: Start accepts. Automaton has 21665 states and 30240 transitions. Word has length 210 [2018-09-10 12:38:14,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:38:14,726 INFO L480 AbstractCegarLoop]: Abstraction has 21665 states and 30240 transitions. [2018-09-10 12:38:14,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:38:14,726 INFO L276 IsEmpty]: Start isEmpty. Operand 21665 states and 30240 transitions. [2018-09-10 12:38:14,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-09-10 12:38:14,737 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:38:14,737 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:38:14,738 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:38:14,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1889246549, now seen corresponding path program 1 times [2018-09-10 12:38:14,738 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:38:14,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:14,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:14,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:14,740 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:38:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 202 proven. 69 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-09-10 12:38:15,147 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:38:15,147 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-10 12:38:15,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:15,163 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:38:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:15,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:38:16,020 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 313 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-09-10 12:38:16,021 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:38:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 202 proven. 69 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-09-10 12:38:16,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:38:16,610 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:38:16,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:16,626 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:38:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:16,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:38:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 313 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-09-10 12:38:17,035 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:38:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 202 proven. 69 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-09-10 12:38:17,291 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:38:17,292 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 11 [2018-09-10 12:38:17,292 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:38:17,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-10 12:38:17,293 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-10 12:38:17,293 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:38:17,294 INFO L87 Difference]: Start difference. First operand 21665 states and 30240 transitions. Second operand 8 states. [2018-09-10 12:38:28,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:38:28,514 INFO L93 Difference]: Finished difference Result 52046 states and 77158 transitions. [2018-09-10 12:38:28,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 12:38:28,516 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 333 [2018-09-10 12:38:28,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:38:28,636 INFO L225 Difference]: With dead ends: 52046 [2018-09-10 12:38:28,636 INFO L226 Difference]: Without dead ends: 30387 [2018-09-10 12:38:28,690 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1347 GetRequests, 1327 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2018-09-10 12:38:28,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30387 states. [2018-09-10 12:38:29,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30387 to 30365. [2018-09-10 12:38:29,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30365 states. [2018-09-10 12:38:29,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30365 states to 30365 states and 42875 transitions. [2018-09-10 12:38:29,285 INFO L78 Accepts]: Start accepts. Automaton has 30365 states and 42875 transitions. Word has length 333 [2018-09-10 12:38:29,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:38:29,286 INFO L480 AbstractCegarLoop]: Abstraction has 30365 states and 42875 transitions. [2018-09-10 12:38:29,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-10 12:38:29,286 INFO L276 IsEmpty]: Start isEmpty. Operand 30365 states and 42875 transitions. [2018-09-10 12:38:29,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2018-09-10 12:38:29,298 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:38:29,298 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:38:29,299 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:38:29,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1415115276, now seen corresponding path program 1 times [2018-09-10 12:38:29,299 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:38:29,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:29,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:29,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:29,301 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:38:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:29,648 WARN L175 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:38:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 86 proven. 90 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:38:30,220 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:38:30,220 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:38:30,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:30,236 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:38:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:30,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:38:31,085 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-09-10 12:38:31,086 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:38:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 86 proven. 90 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:38:31,738 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:38:31,739 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-09-10 12:38:31,739 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:38:31,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:38:31,740 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:38:31,740 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-10 12:38:31,741 INFO L87 Difference]: Start difference. First operand 30365 states and 42875 transitions. Second operand 5 states. [2018-09-10 12:38:37,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:38:37,840 INFO L93 Difference]: Finished difference Result 67520 states and 98325 transitions. [2018-09-10 12:38:37,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:38:37,840 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 380 [2018-09-10 12:38:37,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:38:37,977 INFO L225 Difference]: With dead ends: 67520 [2018-09-10 12:38:37,977 INFO L226 Difference]: Without dead ends: 37161 [2018-09-10 12:38:38,048 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 769 GetRequests, 754 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2018-09-10 12:38:38,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37161 states. [2018-09-10 12:38:39,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37161 to 36899. [2018-09-10 12:38:39,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36899 states. [2018-09-10 12:38:39,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36899 states to 36899 states and 48983 transitions. [2018-09-10 12:38:39,243 INFO L78 Accepts]: Start accepts. Automaton has 36899 states and 48983 transitions. Word has length 380 [2018-09-10 12:38:39,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:38:39,243 INFO L480 AbstractCegarLoop]: Abstraction has 36899 states and 48983 transitions. [2018-09-10 12:38:39,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:38:39,244 INFO L276 IsEmpty]: Start isEmpty. Operand 36899 states and 48983 transitions. [2018-09-10 12:38:39,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2018-09-10 12:38:39,259 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:38:39,259 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:38:39,260 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:38:39,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1519767739, now seen corresponding path program 1 times [2018-09-10 12:38:39,260 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:38:39,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:39,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:39,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:39,261 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:38:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:39,674 WARN L175 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:38:40,663 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 81 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:38:40,663 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:38:40,663 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-10 12:38:40,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:40,679 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:38:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:40,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:38:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-09-10 12:38:40,874 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:38:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-09-10 12:38:41,008 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 12:38:41,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2018-09-10 12:38:41,009 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:38:41,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:38:41,010 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:38:41,010 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-10 12:38:41,010 INFO L87 Difference]: Start difference. First operand 36899 states and 48983 transitions. Second operand 3 states. [2018-09-10 12:38:45,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:38:45,389 INFO L93 Difference]: Finished difference Result 71728 states and 95730 transitions. [2018-09-10 12:38:45,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:38:45,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 397 [2018-09-10 12:38:45,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:38:45,477 INFO L225 Difference]: With dead ends: 71728 [2018-09-10 12:38:45,477 INFO L226 Difference]: Without dead ends: 34835 [2018-09-10 12:38:45,549 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 805 GetRequests, 795 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-10 12:38:45,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34835 states. [2018-09-10 12:38:46,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34835 to 34126. [2018-09-10 12:38:46,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34126 states. [2018-09-10 12:38:46,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34126 states to 34126 states and 41706 transitions. [2018-09-10 12:38:46,303 INFO L78 Accepts]: Start accepts. Automaton has 34126 states and 41706 transitions. Word has length 397 [2018-09-10 12:38:46,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:38:46,304 INFO L480 AbstractCegarLoop]: Abstraction has 34126 states and 41706 transitions. [2018-09-10 12:38:46,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:38:46,304 INFO L276 IsEmpty]: Start isEmpty. Operand 34126 states and 41706 transitions. [2018-09-10 12:38:46,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2018-09-10 12:38:46,316 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:38:46,316 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:38:46,317 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:38:46,317 INFO L82 PathProgramCache]: Analyzing trace with hash -648182935, now seen corresponding path program 1 times [2018-09-10 12:38:46,317 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:38:46,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:46,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:46,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:46,318 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:38:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2018-09-10 12:38:46,740 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:38:46,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-10 12:38:46,740 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:38:46,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 12:38:46,741 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 12:38:46,741 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:38:46,741 INFO L87 Difference]: Start difference. First operand 34126 states and 41706 transitions. Second operand 4 states. [2018-09-10 12:38:54,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:38:54,539 INFO L93 Difference]: Finished difference Result 79620 states and 98446 transitions. [2018-09-10 12:38:54,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 12:38:54,540 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 431 [2018-09-10 12:38:54,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:38:54,640 INFO L225 Difference]: With dead ends: 79620 [2018-09-10 12:38:54,640 INFO L226 Difference]: Without dead ends: 45500 [2018-09-10 12:38:54,698 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:38:54,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45500 states. [2018-09-10 12:38:55,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45500 to 44797. [2018-09-10 12:38:55,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44797 states. [2018-09-10 12:38:55,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44797 states to 44797 states and 53049 transitions. [2018-09-10 12:38:55,817 INFO L78 Accepts]: Start accepts. Automaton has 44797 states and 53049 transitions. Word has length 431 [2018-09-10 12:38:55,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:38:55,818 INFO L480 AbstractCegarLoop]: Abstraction has 44797 states and 53049 transitions. [2018-09-10 12:38:55,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 12:38:55,818 INFO L276 IsEmpty]: Start isEmpty. Operand 44797 states and 53049 transitions. [2018-09-10 12:38:55,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 698 [2018-09-10 12:38:55,889 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:38:55,890 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:38:55,890 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:38:55,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1377228451, now seen corresponding path program 1 times [2018-09-10 12:38:55,890 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:38:55,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:55,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:55,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:55,893 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:38:55,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 360 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-09-10 12:38:57,042 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:38:57,042 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:38:57,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:57,058 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:38:57,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:57,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:38:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 360 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-09-10 12:38:57,682 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:38:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 360 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-09-10 12:38:58,629 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:38:58,630 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:38:58,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:58,647 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:38:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:59,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:38:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 360 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-09-10 12:38:59,469 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:39:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 360 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-09-10 12:39:00,075 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:39:00,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-09-10 12:39:00,075 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:39:00,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:39:00,077 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:39:00,078 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2018-09-10 12:39:00,078 INFO L87 Difference]: Start difference. First operand 44797 states and 53049 transitions. Second operand 9 states. [2018-09-10 12:39:22,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:39:22,117 INFO L93 Difference]: Finished difference Result 136783 states and 178995 transitions. [2018-09-10 12:39:22,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-10 12:39:22,117 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 697 [2018-09-10 12:39:22,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:39:22,542 INFO L225 Difference]: With dead ends: 136783 [2018-09-10 12:39:22,542 INFO L226 Difference]: Without dead ends: 88838 [2018-09-10 12:39:22,775 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2872 GetRequests, 2817 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=566, Invalid=2296, Unknown=0, NotChecked=0, Total=2862 [2018-09-10 12:39:22,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88838 states. [2018-09-10 12:39:24,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88838 to 86896. [2018-09-10 12:39:24,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86896 states. [2018-09-10 12:39:24,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86896 states to 86896 states and 107947 transitions. [2018-09-10 12:39:24,715 INFO L78 Accepts]: Start accepts. Automaton has 86896 states and 107947 transitions. Word has length 697 [2018-09-10 12:39:24,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:39:24,716 INFO L480 AbstractCegarLoop]: Abstraction has 86896 states and 107947 transitions. [2018-09-10 12:39:24,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:39:24,716 INFO L276 IsEmpty]: Start isEmpty. Operand 86896 states and 107947 transitions. [2018-09-10 12:39:24,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1024 [2018-09-10 12:39:24,941 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:39:24,941 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:39:24,942 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:39:24,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1697576667, now seen corresponding path program 1 times [2018-09-10 12:39:24,942 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:39:24,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:39:24,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:39:24,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:39:24,944 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:39:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:39:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 494 proven. 96 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2018-09-10 12:39:26,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:39:26,577 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:39:26,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:39:26,586 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:39:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:39:26,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:39:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 1003 proven. 2 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2018-09-10 12:39:27,322 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:39:28,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 494 proven. 96 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2018-09-10 12:39:28,170 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:39:28,171 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:39:28,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:39:28,188 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:39:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:39:28,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:39:29,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 1003 proven. 2 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2018-09-10 12:39:29,561 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:39:30,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 494 proven. 96 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2018-09-10 12:39:30,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:39:30,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-10 12:39:30,179 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:39:30,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:39:30,182 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:39:30,182 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:39:30,182 INFO L87 Difference]: Start difference. First operand 86896 states and 107947 transitions. Second operand 9 states. [2018-09-10 12:39:45,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:39:45,214 INFO L93 Difference]: Finished difference Result 195986 states and 246283 transitions. [2018-09-10 12:39:45,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-10 12:39:45,214 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1023 [2018-09-10 12:39:45,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:39:45,663 INFO L225 Difference]: With dead ends: 195986 [2018-09-10 12:39:45,664 INFO L226 Difference]: Without dead ends: 109799 [2018-09-10 12:39:45,992 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4110 GetRequests, 4089 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2018-09-10 12:39:46,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109799 states. [2018-09-10 12:39:48,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109799 to 109074. [2018-09-10 12:39:48,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109074 states. [2018-09-10 12:39:48,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109074 states to 109074 states and 133179 transitions. [2018-09-10 12:39:48,771 INFO L78 Accepts]: Start accepts. Automaton has 109074 states and 133179 transitions. Word has length 1023 [2018-09-10 12:39:48,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:39:48,772 INFO L480 AbstractCegarLoop]: Abstraction has 109074 states and 133179 transitions. [2018-09-10 12:39:48,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:39:48,772 INFO L276 IsEmpty]: Start isEmpty. Operand 109074 states and 133179 transitions. [2018-09-10 12:39:49,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1134 [2018-09-10 12:39:49,011 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:39:49,012 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:39:49,012 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:39:49,013 INFO L82 PathProgramCache]: Analyzing trace with hash -661634207, now seen corresponding path program 1 times [2018-09-10 12:39:49,013 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:39:49,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:39:49,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:39:49,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:39:49,014 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:39:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:39:49,721 WARN L175 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-10 12:39:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1539 backedges. 284 proven. 809 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2018-09-10 12:39:51,324 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:39:51,324 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:39:51,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:39:51,332 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:39:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:39:51,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:39:52,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1539 backedges. 1066 proven. 2 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2018-09-10 12:39:52,149 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:39:52,624 WARN L175 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-10 12:39:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1539 backedges. 459 proven. 74 refuted. 0 times theorem prover too weak. 1006 trivial. 0 not checked. [2018-09-10 12:39:53,321 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:39:53,322 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 12 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 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:39:53,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:39:53,338 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:39:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:39:54,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:39:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1539 backedges. 1066 proven. 2 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2018-09-10 12:39:55,541 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:39:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1539 backedges. 459 proven. 74 refuted. 0 times theorem prover too weak. 1006 trivial. 0 not checked. [2018-09-10 12:39:56,425 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:39:56,426 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5, 5, 5] total 20 [2018-09-10 12:39:56,426 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:39:56,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-10 12:39:56,429 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-10 12:39:56,429 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2018-09-10 12:39:56,429 INFO L87 Difference]: Start difference. First operand 109074 states and 133179 transitions. Second operand 14 states. [2018-09-10 12:40:22,595 WARN L175 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2018-09-10 12:40:36,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:40:36,963 INFO L93 Difference]: Finished difference Result 248595 states and 303109 transitions. [2018-09-10 12:40:36,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-10 12:40:36,963 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1133 [2018-09-10 12:40:36,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:40:37,334 INFO L225 Difference]: With dead ends: 248595 [2018-09-10 12:40:37,335 INFO L226 Difference]: Without dead ends: 138175 [2018-09-10 12:40:37,565 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4643 GetRequests, 4572 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=916, Invalid=4054, Unknown=0, NotChecked=0, Total=4970 [2018-09-10 12:40:37,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138175 states. [2018-09-10 12:40:39,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138175 to 133943. [2018-09-10 12:40:39,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133943 states. [2018-09-10 12:40:39,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133943 states to 133943 states and 153401 transitions. [2018-09-10 12:40:39,900 INFO L78 Accepts]: Start accepts. Automaton has 133943 states and 153401 transitions. Word has length 1133 [2018-09-10 12:40:39,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:40:39,901 INFO L480 AbstractCegarLoop]: Abstraction has 133943 states and 153401 transitions. [2018-09-10 12:40:39,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-10 12:40:39,901 INFO L276 IsEmpty]: Start isEmpty. Operand 133943 states and 153401 transitions. [2018-09-10 12:40:40,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1593 [2018-09-10 12:40:40,087 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:40:40,089 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:40:40,089 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:40:40,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1692403942, now seen corresponding path program 1 times [2018-09-10 12:40:40,090 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:40:40,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:40:40,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:40:40,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:40:40,091 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:40:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:40:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2399 backedges. 826 proven. 925 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2018-09-10 12:40:45,062 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:40:45,062 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:40:45,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:40:45,070 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:40:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:40:45,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:40:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2399 backedges. 1535 proven. 2 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2018-09-10 12:40:47,081 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:40:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2399 backedges. 585 proven. 74 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2018-09-10 12:40:48,121 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:40:48,122 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:40:48,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:40:48,138 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:40:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:40:49,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:40:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2399 backedges. 1535 proven. 2 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2018-09-10 12:40:50,132 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:40:51,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2399 backedges. 585 proven. 74 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2018-09-10 12:40:51,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:40:51,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 5, 5, 5, 5] total 24 [2018-09-10 12:40:51,211 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:40:51,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-10 12:40:51,213 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-10 12:40:51,214 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2018-09-10 12:40:51,214 INFO L87 Difference]: Start difference. First operand 133943 states and 153401 transitions. Second operand 22 states. [2018-09-10 12:41:00,481 WARN L175 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 Received shutdown request... [2018-09-10 12:41:02,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-10 12:41:02,858 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 12:41:02,864 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 12:41:02,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 12:41:02 BoogieIcfgContainer [2018-09-10 12:41:02,864 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 12:41:02,865 INFO L168 Benchmark]: Toolchain (without parser) took 225493.82 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 2.9 GB in the end (delta: -1.4 GB). Peak memory consumption was 975.4 MB. Max. memory is 7.1 GB. [2018-09-10 12:41:02,866 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-10 12:41:02,866 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2106.71 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: 180.0 MB). Peak memory consumption was 180.0 MB. Max. memory is 7.1 GB. [2018-09-10 12:41:02,867 INFO L168 Benchmark]: Boogie Procedure Inliner took 194.04 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. [2018-09-10 12:41:02,868 INFO L168 Benchmark]: Boogie Preprocessor took 623.39 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 853.0 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 85.7 MB. Max. memory is 7.1 GB. [2018-09-10 12:41:02,869 INFO L168 Benchmark]: RCFGBuilder took 8381.54 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 1.7 GB in the end (delta: 549.0 MB). Peak memory consumption was 549.0 MB. Max. memory is 7.1 GB. [2018-09-10 12:41:02,870 INFO L168 Benchmark]: TraceAbstraction took 214181.65 ms. Allocated memory was 2.4 GB in the beginning and 3.9 GB in the end (delta: 1.6 GB). Free memory was 1.7 GB in the beginning and 2.9 GB in the end (delta: -1.1 GB). Peak memory consumption was 439.6 MB. Max. memory is 7.1 GB. [2018-09-10 12:41:02,874 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2106.71 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: 180.0 MB). Peak memory consumption was 180.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 194.04 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 623.39 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 853.0 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 85.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8381.54 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 1.7 GB in the end (delta: 549.0 MB). Peak memory consumption was 549.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 214181.65 ms. Allocated memory was 2.4 GB in the beginning and 3.9 GB in the end (delta: 1.6 GB). Free memory was 1.7 GB in the beginning and 2.9 GB in the end (delta: -1.1 GB). Peak memory consumption was 439.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 138]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 138). Cancelled while BasicCegarLoop was constructing difference of abstraction (133943states) and FLOYD_HOARE automaton (currently 34 states, 22 states before enhancement), while ReachableStatesComputation was computing reachable states (12498 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 775 locations, 1 error locations. TIMEOUT Result, 214.1s OverallTime, 12 OverallIterations, 7 TraceHistogramMax, 163.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3598 SDtfs, 52619 SDslu, 3403 SDs, 0 SdLazy, 104163 SolverSat, 21214 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 124.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21444 GetRequests, 21162 SyntacticMatches, 31 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3187 ImplicationChecksByTransitivity, 13.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=133943occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 11.9s AutomataMinimizationTime, 11 MinimizatonAttempts, 8877 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 5.0s SatisfiabilityAnalysisTime, 25.4s InterpolantComputationTime, 17056 NumberOfCodeBlocks, 17056 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 27561 ConstructedInterpolants, 0 QuantifiedInterpolants, 54983094 SizeOfPredicates, 4 NumberOfNonLiveVariables, 14290 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 38 InterpolantComputations, 8 PerfectInterpolantSequences, 29406/32395 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_label30_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_12-41-02-888.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem18_label30_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_12-41-02-888.csv Completed graceful shutdown