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_label21_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 12:36:16,380 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 12:36:16,383 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 12:36:16,400 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 12:36:16,400 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 12:36:16,403 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 12:36:16,405 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 12:36:16,407 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 12:36:16,410 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 12:36:16,412 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 12:36:16,414 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 12:36:16,414 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 12:36:16,415 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 12:36:16,419 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 12:36:16,427 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 12:36:16,428 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 12:36:16,432 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 12:36:16,436 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 12:36:16,440 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 12:36:16,443 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 12:36:16,445 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 12:36:16,446 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 12:36:16,449 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 12:36:16,449 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 12:36:16,452 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 12:36:16,453 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 12:36:16,454 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 12:36:16,455 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 12:36:16,457 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 12:36:16,458 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 12:36:16,458 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 12:36:16,459 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 12:36:16,459 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 12:36:16,460 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 12:36:16,462 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 12:36:16,463 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 12:36:16,464 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 12:36:16,491 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 12:36:16,492 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 12:36:16,493 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 12:36:16,493 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 12:36:16,493 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 12:36:16,494 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 12:36:16,494 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 12:36:16,494 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 12:36:16,494 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 12:36:16,495 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 12:36:16,495 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 12:36:16,496 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 12:36:16,496 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 12:36:16,496 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 12:36:16,496 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 12:36:16,497 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 12:36:16,497 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 12:36:16,497 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 12:36:16,497 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 12:36:16,499 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 12:36:16,499 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 12:36:16,499 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 12:36:16,499 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 12:36:16,500 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 12:36:16,500 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 12:36:16,500 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 12:36:16,500 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 12:36:16,500 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 12:36:16,501 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 12:36:16,501 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 12:36:16,501 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 12:36:16,501 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 12:36:16,501 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 12:36:16,569 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 12:36:16,586 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 12:36:16,592 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 12:36:16,594 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 12:36:16,594 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 12:36:16,595 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label21_true-unreach-call.c [2018-09-10 12:36:16,947 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1eb0ff0cc/e5faa4eb882f469b807bf33e21501556/FLAG6746b8d39 [2018-09-10 12:36:17,386 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 12:36:17,387 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label21_true-unreach-call.c [2018-09-10 12:36:17,419 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1eb0ff0cc/e5faa4eb882f469b807bf33e21501556/FLAG6746b8d39 [2018-09-10 12:36:17,435 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1eb0ff0cc/e5faa4eb882f469b807bf33e21501556 [2018-09-10 12:36:17,447 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 12:36:17,451 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 12:36:17,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 12:36:17,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 12:36:17,460 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 12:36:17,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:36:17" (1/1) ... [2018-09-10 12:36:17,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@782dc4bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:17, skipping insertion in model container [2018-09-10 12:36:17,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:36:17" (1/1) ... [2018-09-10 12:36:17,807 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 12:36:18,612 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:36:18,633 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 12:36:19,151 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:36:19,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:19 WrapperNode [2018-09-10 12:36:19,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 12:36:19,291 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 12:36:19,292 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 12:36:19,292 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 12:36:19,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:19" (1/1) ... [2018-09-10 12:36:19,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:19" (1/1) ... [2018-09-10 12:36:19,460 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 12:36:19,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 12:36:19,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 12:36:19,461 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 12:36:19,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:19" (1/1) ... [2018-09-10 12:36:19,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:19" (1/1) ... [2018-09-10 12:36:19,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:19" (1/1) ... [2018-09-10 12:36:19,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:19" (1/1) ... [2018-09-10 12:36:19,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:19" (1/1) ... [2018-09-10 12:36:20,017 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:19" (1/1) ... [2018-09-10 12:36:20,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:19" (1/1) ... [2018-09-10 12:36:20,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 12:36:20,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 12:36:20,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 12:36:20,084 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 12:36:20,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:19" (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 12:36:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 12:36:20,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 12:36:20,158 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 12:36:20,158 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 12:36:20,158 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 12:36:20,158 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 12:36:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 12:36:20,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 12:36:20,159 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 12:36:20,159 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 12:36:20,159 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 12:36:20,159 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 12:36:28,767 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 12:36:28,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:36:28 BoogieIcfgContainer [2018-09-10 12:36:28,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 12:36:28,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 12:36:28,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 12:36:28,773 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 12:36:28,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 12:36:17" (1/3) ... [2018-09-10 12:36:28,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a17cac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:36:28, skipping insertion in model container [2018-09-10 12:36:28,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:19" (2/3) ... [2018-09-10 12:36:28,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a17cac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:36:28, skipping insertion in model container [2018-09-10 12:36:28,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:36:28" (3/3) ... [2018-09-10 12:36:28,777 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label21_true-unreach-call.c [2018-09-10 12:36:28,787 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 12:36:28,797 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 12:36:28,861 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 12:36:28,862 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 12:36:28,862 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 12:36:28,862 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 12:36:28,862 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 12:36:28,863 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 12:36:28,863 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 12:36:28,863 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 12:36:28,863 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 12:36:28,910 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states. [2018-09-10 12:36:28,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-10 12:36:28,920 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:36:28,922 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:36:28,923 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 12:36:28,928 INFO L82 PathProgramCache]: Analyzing trace with hash -214951943, now seen corresponding path program 1 times [2018-09-10 12:36:28,930 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:36:28,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:36:28,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:36:28,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:36:28,988 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:36:29,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:36:29,473 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 12:36:29,477 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:36:29,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 12:36:29,477 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:36:29,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:36:29,502 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:36:29,502 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:36:29,505 INFO L87 Difference]: Start difference. First operand 775 states. Second operand 3 states. [2018-09-10 12:36:36,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:36:36,208 INFO L93 Difference]: Finished difference Result 2251 states and 4322 transitions. [2018-09-10 12:36:36,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:36:36,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2018-09-10 12:36:36,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:36:36,253 INFO L225 Difference]: With dead ends: 2251 [2018-09-10 12:36:36,253 INFO L226 Difference]: Without dead ends: 1474 [2018-09-10 12:36:36,270 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:36:36,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2018-09-10 12:36:36,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1474. [2018-09-10 12:36:36,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1474 states. [2018-09-10 12:36:36,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2721 transitions. [2018-09-10 12:36:36,470 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2721 transitions. Word has length 65 [2018-09-10 12:36:36,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:36:36,471 INFO L480 AbstractCegarLoop]: Abstraction has 1474 states and 2721 transitions. [2018-09-10 12:36:36,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:36:36,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2721 transitions. [2018-09-10 12:36:36,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-10 12:36:36,481 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:36:36,481 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, 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] [2018-09-10 12:36:36,482 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 12:36:36,482 INFO L82 PathProgramCache]: Analyzing trace with hash -800921010, now seen corresponding path program 1 times [2018-09-10 12:36:36,482 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:36:36,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:36:36,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:36:36,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:36:36,484 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:36:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:36:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:36:36,817 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:36:36,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 12:36:36,818 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:36:36,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:36:36,820 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:36:36,820 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:36:36,821 INFO L87 Difference]: Start difference. First operand 1474 states and 2721 transitions. Second operand 6 states. [2018-09-10 12:36:55,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:36:55,313 INFO L93 Difference]: Finished difference Result 5908 states and 11160 transitions. [2018-09-10 12:36:55,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-10 12:36:55,314 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 137 [2018-09-10 12:36:55,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:36:55,346 INFO L225 Difference]: With dead ends: 5908 [2018-09-10 12:36:55,346 INFO L226 Difference]: Without dead ends: 4440 [2018-09-10 12:36:55,361 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-09-10 12:36:55,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4440 states. [2018-09-10 12:36:55,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4440 to 4388. [2018-09-10 12:36:55,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4388 states. [2018-09-10 12:36:55,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 7148 transitions. [2018-09-10 12:36:55,503 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 7148 transitions. Word has length 137 [2018-09-10 12:36:55,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:36:55,503 INFO L480 AbstractCegarLoop]: Abstraction has 4388 states and 7148 transitions. [2018-09-10 12:36:55,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:36:55,504 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 7148 transitions. [2018-09-10 12:36:55,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-10 12:36:55,509 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:36:55,509 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, 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] [2018-09-10 12:36:55,509 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 12:36:55,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1166765483, now seen corresponding path program 1 times [2018-09-10 12:36:55,510 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:36:55,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:36:55,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:36:55,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:36:55,511 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:36:55,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:36:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:36:55,715 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:36:55,716 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 12:36:55,716 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:36:55,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:36:55,718 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:36:55,718 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:36:55,718 INFO L87 Difference]: Start difference. First operand 4388 states and 7148 transitions. Second operand 6 states. [2018-09-10 12:37:05,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:37:05,658 INFO L93 Difference]: Finished difference Result 17447 states and 29630 transitions. [2018-09-10 12:37:05,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:37:05,665 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2018-09-10 12:37:05,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:37:05,737 INFO L225 Difference]: With dead ends: 17447 [2018-09-10 12:37:05,738 INFO L226 Difference]: Without dead ends: 13065 [2018-09-10 12:37:05,776 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 12:37:05,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13065 states. [2018-09-10 12:37:06,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13065 to 12964. [2018-09-10 12:37:06,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12964 states. [2018-09-10 12:37:06,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12964 states to 12964 states and 20062 transitions. [2018-09-10 12:37:06,159 INFO L78 Accepts]: Start accepts. Automaton has 12964 states and 20062 transitions. Word has length 160 [2018-09-10 12:37:06,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:37:06,160 INFO L480 AbstractCegarLoop]: Abstraction has 12964 states and 20062 transitions. [2018-09-10 12:37:06,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:37:06,160 INFO L276 IsEmpty]: Start isEmpty. Operand 12964 states and 20062 transitions. [2018-09-10 12:37:06,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-09-10 12:37:06,166 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:37:06,170 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, 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] [2018-09-10 12:37:06,170 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 12:37:06,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1977424478, now seen corresponding path program 1 times [2018-09-10 12:37:06,171 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:37:06,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:37:06,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:37:06,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:37:06,172 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:37:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:37:06,484 WARN L175 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:37:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:37:06,544 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:37:06,544 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 12:37:06,544 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:37:06,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:37:06,545 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:37:06,545 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:37:06,545 INFO L87 Difference]: Start difference. First operand 12964 states and 20062 transitions. Second operand 6 states. [2018-09-10 12:37:13,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:37:13,752 INFO L93 Difference]: Finished difference Result 34984 states and 58787 transitions. [2018-09-10 12:37:13,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:37:13,755 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 195 [2018-09-10 12:37:13,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:37:13,872 INFO L225 Difference]: With dead ends: 34984 [2018-09-10 12:37:13,872 INFO L226 Difference]: Without dead ends: 22026 [2018-09-10 12:37:13,936 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-10 12:37:13,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22026 states. [2018-09-10 12:37:14,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22026 to 21857. [2018-09-10 12:37:14,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21857 states. [2018-09-10 12:37:14,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21857 states to 21857 states and 34271 transitions. [2018-09-10 12:37:14,567 INFO L78 Accepts]: Start accepts. Automaton has 21857 states and 34271 transitions. Word has length 195 [2018-09-10 12:37:14,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:37:14,568 INFO L480 AbstractCegarLoop]: Abstraction has 21857 states and 34271 transitions. [2018-09-10 12:37:14,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:37:14,568 INFO L276 IsEmpty]: Start isEmpty. Operand 21857 states and 34271 transitions. [2018-09-10 12:37:14,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-09-10 12:37:14,575 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:37:14,576 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:37:14,576 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 12:37:14,576 INFO L82 PathProgramCache]: Analyzing trace with hash -272994942, now seen corresponding path program 1 times [2018-09-10 12:37:14,576 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:37:14,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:37:14,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:37:14,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:37:14,578 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:37:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:37:15,081 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:37:15,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:37:15,082 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 12:37:15,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:37:15,106 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:37:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:37:15,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:37:15,497 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:37:15,497 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:37:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:37:15,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:37:15,743 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 3 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 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:37:15,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:37:15,936 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:37:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:37:16,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:37:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:37:16,357 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:37:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:37:16,809 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:37:16,809 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-09-10 12:37:16,809 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:37:16,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:37:16,810 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:37:16,811 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2018-09-10 12:37:16,811 INFO L87 Difference]: Start difference. First operand 21857 states and 34271 transitions. Second operand 9 states. [2018-09-10 12:37:30,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:37:30,688 INFO L93 Difference]: Finished difference Result 52613 states and 89940 transitions. [2018-09-10 12:37:30,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 12:37:30,689 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 244 [2018-09-10 12:37:30,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:37:30,871 INFO L225 Difference]: With dead ends: 52613 [2018-09-10 12:37:30,871 INFO L226 Difference]: Without dead ends: 30762 [2018-09-10 12:37:31,000 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 970 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2018-09-10 12:37:31,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30762 states. [2018-09-10 12:37:31,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30762 to 29860. [2018-09-10 12:37:31,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29860 states. [2018-09-10 12:37:31,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29860 states to 29860 states and 40657 transitions. [2018-09-10 12:37:31,964 INFO L78 Accepts]: Start accepts. Automaton has 29860 states and 40657 transitions. Word has length 244 [2018-09-10 12:37:31,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:37:31,964 INFO L480 AbstractCegarLoop]: Abstraction has 29860 states and 40657 transitions. [2018-09-10 12:37:31,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:37:31,965 INFO L276 IsEmpty]: Start isEmpty. Operand 29860 states and 40657 transitions. [2018-09-10 12:37:31,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-09-10 12:37:31,973 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:37:31,973 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:37:31,974 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 12:37:31,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1750811369, now seen corresponding path program 1 times [2018-09-10 12:37:31,974 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:37:31,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:37:31,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:37:31,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:37:31,976 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:37:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:37:32,516 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:37:32,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:37:32,517 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:37:32,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:37:32,538 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:37:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:37:32,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:37:33,078 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:37:33,078 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:37:33,230 WARN L175 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-10 12:37:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:37:34,117 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:37:34,117 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 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:37:34,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:37:34,134 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:37:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:37:34,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:37:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:37:34,548 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:37:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:37:35,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:37:35,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-09-10 12:37:35,176 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:37:35,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:37:35,177 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:37:35,178 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:37:35,178 INFO L87 Difference]: Start difference. First operand 29860 states and 40657 transitions. Second operand 9 states. [2018-09-10 12:37:48,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:37:48,044 INFO L93 Difference]: Finished difference Result 91338 states and 153145 transitions. [2018-09-10 12:37:48,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-10 12:37:48,044 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 271 [2018-09-10 12:37:48,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:37:48,628 INFO L225 Difference]: With dead ends: 91338 [2018-09-10 12:37:48,629 INFO L226 Difference]: Without dead ends: 59314 [2018-09-10 12:37:48,930 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1105 GetRequests, 1081 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2018-09-10 12:37:48,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59314 states. [2018-09-10 12:37:50,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59314 to 57467. [2018-09-10 12:37:50,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57467 states. [2018-09-10 12:37:51,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57467 states to 57467 states and 87723 transitions. [2018-09-10 12:37:51,820 INFO L78 Accepts]: Start accepts. Automaton has 57467 states and 87723 transitions. Word has length 271 [2018-09-10 12:37:51,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:37:51,820 INFO L480 AbstractCegarLoop]: Abstraction has 57467 states and 87723 transitions. [2018-09-10 12:37:51,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:37:51,821 INFO L276 IsEmpty]: Start isEmpty. Operand 57467 states and 87723 transitions. [2018-09-10 12:37:51,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-09-10 12:37:51,835 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:37:51,835 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:37:51,835 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 12:37:51,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1575314236, now seen corresponding path program 1 times [2018-09-10 12:37:51,836 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:37:51,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:37:51,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:37:51,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:37:51,837 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:37:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:37:52,644 WARN L175 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2018-09-10 12:37:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 116 proven. 94 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:37:52,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:37:52,780 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 12:37:52,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:37:52,787 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:37:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:37:52,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:37:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-09-10 12:37:53,070 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:37:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 116 proven. 94 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:37:53,275 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:37:53,276 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 12 [2018-09-10 12:37:53,276 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:37:53,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:37:53,276 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:37:53,276 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:37:53,277 INFO L87 Difference]: Start difference. First operand 57467 states and 87723 transitions. Second operand 5 states. [2018-09-10 12:38:00,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:38:00,442 INFO L93 Difference]: Finished difference Result 123352 states and 180141 transitions. [2018-09-10 12:38:00,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 12:38:00,443 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 302 [2018-09-10 12:38:00,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:38:00,809 INFO L225 Difference]: With dead ends: 123352 [2018-09-10 12:38:00,809 INFO L226 Difference]: Without dead ends: 63037 [2018-09-10 12:38:01,052 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 600 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2018-09-10 12:38:01,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63037 states. [2018-09-10 12:38:02,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63037 to 58739. [2018-09-10 12:38:02,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58739 states. [2018-09-10 12:38:02,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58739 states to 58739 states and 77938 transitions. [2018-09-10 12:38:02,350 INFO L78 Accepts]: Start accepts. Automaton has 58739 states and 77938 transitions. Word has length 302 [2018-09-10 12:38:02,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:38:02,351 INFO L480 AbstractCegarLoop]: Abstraction has 58739 states and 77938 transitions. [2018-09-10 12:38:02,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:38:02,351 INFO L276 IsEmpty]: Start isEmpty. Operand 58739 states and 77938 transitions. [2018-09-10 12:38:02,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2018-09-10 12:38:02,375 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:38:02,375 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:38:02,376 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 12:38:02,376 INFO L82 PathProgramCache]: Analyzing trace with hash 467520752, now seen corresponding path program 1 times [2018-09-10 12:38:02,376 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:38:02,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:02,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:02,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:02,377 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:38:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 278 proven. 212 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:38:02,889 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:38:02,889 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 12:38:02,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:02,898 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:38:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:03,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:38:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 373 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-09-10 12:38:03,182 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:38:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 373 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-09-10 12:38:03,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:38:03,917 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 12:38:03,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:03,933 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:38:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:04,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:38:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 373 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-09-10 12:38:04,453 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:38:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 373 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-09-10 12:38:05,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:38:05,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 15 [2018-09-10 12:38:05,128 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:38:05,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-10 12:38:05,129 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-10 12:38:05,129 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-09-10 12:38:05,129 INFO L87 Difference]: Start difference. First operand 58739 states and 77938 transitions. Second operand 13 states. [2018-09-10 12:38:25,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:38:25,815 INFO L93 Difference]: Finished difference Result 124907 states and 164949 transitions. [2018-09-10 12:38:25,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-10 12:38:25,815 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 425 [2018-09-10 12:38:25,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:38:26,054 INFO L225 Difference]: With dead ends: 124907 [2018-09-10 12:38:26,055 INFO L226 Difference]: Without dead ends: 57795 [2018-09-10 12:38:26,295 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1769 GetRequests, 1720 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=513, Invalid=1649, Unknown=0, NotChecked=0, Total=2162 [2018-09-10 12:38:26,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57795 states. [2018-09-10 12:38:27,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57795 to 53337. [2018-09-10 12:38:27,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53337 states. [2018-09-10 12:38:27,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53337 states to 53337 states and 64458 transitions. [2018-09-10 12:38:27,215 INFO L78 Accepts]: Start accepts. Automaton has 53337 states and 64458 transitions. Word has length 425 [2018-09-10 12:38:27,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:38:27,216 INFO L480 AbstractCegarLoop]: Abstraction has 53337 states and 64458 transitions. [2018-09-10 12:38:27,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-10 12:38:27,217 INFO L276 IsEmpty]: Start isEmpty. Operand 53337 states and 64458 transitions. [2018-09-10 12:38:27,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2018-09-10 12:38:27,242 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:38:27,243 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, 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, 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 12:38:27,243 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 12:38:27,243 INFO L82 PathProgramCache]: Analyzing trace with hash 209502181, now seen corresponding path program 1 times [2018-09-10 12:38:27,244 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:38:27,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:27,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:27,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:27,245 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:38:27,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:28,247 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2018-09-10 12:38:28,247 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:38:28,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-10 12:38:28,248 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:38:28,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 12:38:28,249 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 12:38:28,249 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:38:28,249 INFO L87 Difference]: Start difference. First operand 53337 states and 64458 transitions. Second operand 4 states. [2018-09-10 12:38:37,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:38:37,225 INFO L93 Difference]: Finished difference Result 131375 states and 160753 transitions. [2018-09-10 12:38:37,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 12:38:37,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 446 [2018-09-10 12:38:37,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:38:37,450 INFO L225 Difference]: With dead ends: 131375 [2018-09-10 12:38:37,450 INFO L226 Difference]: Without dead ends: 78044 [2018-09-10 12:38:37,547 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:38:37,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78044 states. [2018-09-10 12:38:39,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78044 to 70998. [2018-09-10 12:38:39,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70998 states. [2018-09-10 12:38:39,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70998 states to 70998 states and 84460 transitions. [2018-09-10 12:38:39,487 INFO L78 Accepts]: Start accepts. Automaton has 70998 states and 84460 transitions. Word has length 446 [2018-09-10 12:38:39,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:38:39,488 INFO L480 AbstractCegarLoop]: Abstraction has 70998 states and 84460 transitions. [2018-09-10 12:38:39,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 12:38:39,489 INFO L276 IsEmpty]: Start isEmpty. Operand 70998 states and 84460 transitions. [2018-09-10 12:38:39,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2018-09-10 12:38:39,528 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:38:39,529 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 12:38:39,529 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 12:38:39,529 INFO L82 PathProgramCache]: Analyzing trace with hash 753785555, now seen corresponding path program 1 times [2018-09-10 12:38:39,529 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:38:39,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:39,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:39,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:39,531 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:38:39,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 117 proven. 471 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-10 12:38:40,310 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:38:40,310 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 12:38:40,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:40,320 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:38:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:40,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:38:40,688 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2018-09-10 12:38:40,688 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:38:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2018-09-10 12:38:40,974 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 12:38:40,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2018-09-10 12:38:40,975 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:38:40,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:38:40,975 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:38:40,976 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:38:40,976 INFO L87 Difference]: Start difference. First operand 70998 states and 84460 transitions. Second operand 3 states. [2018-09-10 12:38:45,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:38:45,417 INFO L93 Difference]: Finished difference Result 139905 states and 166619 transitions. [2018-09-10 12:38:45,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:38:45,417 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 586 [2018-09-10 12:38:45,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:38:45,625 INFO L225 Difference]: With dead ends: 139905 [2018-09-10 12:38:45,625 INFO L226 Difference]: Without dead ends: 68913 [2018-09-10 12:38:45,729 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1187 GetRequests, 1174 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:38:45,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68913 states. [2018-09-10 12:38:46,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68913 to 68177. [2018-09-10 12:38:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68177 states. [2018-09-10 12:38:46,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68177 states to 68177 states and 79160 transitions. [2018-09-10 12:38:46,752 INFO L78 Accepts]: Start accepts. Automaton has 68177 states and 79160 transitions. Word has length 586 [2018-09-10 12:38:46,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:38:46,753 INFO L480 AbstractCegarLoop]: Abstraction has 68177 states and 79160 transitions. [2018-09-10 12:38:46,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:38:46,753 INFO L276 IsEmpty]: Start isEmpty. Operand 68177 states and 79160 transitions. [2018-09-10 12:38:46,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2018-09-10 12:38:46,799 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:38:46,800 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:38:46,800 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 12:38:46,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1430678364, now seen corresponding path program 1 times [2018-09-10 12:38:46,801 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:38:46,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:46,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:46,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:46,802 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:38:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:47,630 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 117 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:38:47,630 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:38:47,630 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:38:47,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:47,639 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:38:47,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:48,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:38:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 237 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:38:48,546 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:38:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 237 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:38:49,301 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:38:49,301 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 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:38:49,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:49,318 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:38:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:49,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:38:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 237 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:38:50,364 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:38:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 237 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:38:51,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:38:51,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 16 [2018-09-10 12:38:51,133 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:38:51,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-10 12:38:51,134 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-10 12:38:51,134 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2018-09-10 12:38:51,135 INFO L87 Difference]: Start difference. First operand 68177 states and 79160 transitions. Second operand 13 states. [2018-09-10 12:39:06,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:39:06,667 INFO L93 Difference]: Finished difference Result 138184 states and 162750 transitions. [2018-09-10 12:39:06,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-10 12:39:06,667 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 664 [2018-09-10 12:39:06,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:39:06,824 INFO L225 Difference]: With dead ends: 138184 [2018-09-10 12:39:06,825 INFO L226 Difference]: Without dead ends: 56995 [2018-09-10 12:39:06,932 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2717 GetRequests, 2658 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=656, Invalid=1894, Unknown=0, NotChecked=0, Total=2550 [2018-09-10 12:39:06,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56995 states. [2018-09-10 12:39:07,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56995 to 55257. [2018-09-10 12:39:07,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55257 states. [2018-09-10 12:39:07,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55257 states to 55257 states and 59407 transitions. [2018-09-10 12:39:07,644 INFO L78 Accepts]: Start accepts. Automaton has 55257 states and 59407 transitions. Word has length 664 [2018-09-10 12:39:07,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:39:07,645 INFO L480 AbstractCegarLoop]: Abstraction has 55257 states and 59407 transitions. [2018-09-10 12:39:07,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-10 12:39:07,646 INFO L276 IsEmpty]: Start isEmpty. Operand 55257 states and 59407 transitions. [2018-09-10 12:39:07,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2018-09-10 12:39:07,664 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:39:07,664 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, 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, 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] [2018-09-10 12:39:07,665 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 12:39:07,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1774877232, now seen corresponding path program 1 times [2018-09-10 12:39:07,665 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:39:07,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:39:07,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:39:07,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:39:07,667 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:39:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:39:08,875 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 227 proven. 168 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-09-10 12:39:08,875 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:39:08,875 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:39:08,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:39:08,887 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:39:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:39:09,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:39:09,596 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2018-09-10 12:39:09,596 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:39:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2018-09-10 12:39:10,018 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 12:39:10,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [12] total 13 [2018-09-10 12:39:10,019 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:39:10,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:39:10,020 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:39:10,020 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-09-10 12:39:10,021 INFO L87 Difference]: Start difference. First operand 55257 states and 59407 transitions. Second operand 3 states. [2018-09-10 12:39:16,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:39:16,695 INFO L93 Difference]: Finished difference Result 126752 states and 136708 transitions. [2018-09-10 12:39:16,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:39:16,695 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 687 [2018-09-10 12:39:16,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:39:16,869 INFO L225 Difference]: With dead ends: 126752 [2018-09-10 12:39:16,869 INFO L226 Difference]: Without dead ends: 71501 [2018-09-10 12:39:16,942 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1389 GetRequests, 1376 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-09-10 12:39:17,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71501 states. [2018-09-10 12:39:17,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71501 to 68103. [2018-09-10 12:39:17,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68103 states. [2018-09-10 12:39:17,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68103 states to 68103 states and 72818 transitions. [2018-09-10 12:39:17,789 INFO L78 Accepts]: Start accepts. Automaton has 68103 states and 72818 transitions. Word has length 687 [2018-09-10 12:39:17,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:39:17,791 INFO L480 AbstractCegarLoop]: Abstraction has 68103 states and 72818 transitions. [2018-09-10 12:39:17,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:39:17,791 INFO L276 IsEmpty]: Start isEmpty. Operand 68103 states and 72818 transitions. [2018-09-10 12:39:17,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1078 [2018-09-10 12:39:17,849 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:39:17,850 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:39:17,850 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:39:17,851 INFO L82 PathProgramCache]: Analyzing trace with hash -2018437595, now seen corresponding path program 1 times [2018-09-10 12:39:17,851 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:39:17,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:39:17,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:39:17,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:39:17,852 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:39:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:39:18,296 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-10 12:39:18,546 WARN L175 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-09-10 12:39:18,745 WARN L175 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2018-09-10 12:39:20,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1834 backedges. 682 proven. 232 refuted. 0 times theorem prover too weak. 920 trivial. 0 not checked. [2018-09-10 12:39:20,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:39:20,313 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 12:39:20,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:39:20,321 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:39:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:39:20,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:39:21,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1834 backedges. 589 proven. 0 refuted. 0 times theorem prover too weak. 1245 trivial. 0 not checked. [2018-09-10 12:39:21,749 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:39:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1834 backedges. 348 proven. 511 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2018-09-10 12:39:23,252 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:39:23,253 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 14 [2018-09-10 12:39:23,253 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:39:23,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:39:23,254 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:39:23,254 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2018-09-10 12:39:23,254 INFO L87 Difference]: Start difference. First operand 68103 states and 72818 transitions. Second operand 5 states. [2018-09-10 12:39:28,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:39:28,556 INFO L93 Difference]: Finished difference Result 140498 states and 150139 transitions. [2018-09-10 12:39:28,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 12:39:28,557 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1077 [2018-09-10 12:39:28,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:39:28,691 INFO L225 Difference]: With dead ends: 140498 [2018-09-10 12:39:28,691 INFO L226 Difference]: Without dead ends: 72401 [2018-09-10 12:39:28,756 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2165 GetRequests, 2149 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2018-09-10 12:39:28,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72401 states. [2018-09-10 12:39:29,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72401 to 72387. [2018-09-10 12:39:29,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72387 states. [2018-09-10 12:39:29,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72387 states to 72387 states and 77280 transitions. [2018-09-10 12:39:29,654 INFO L78 Accepts]: Start accepts. Automaton has 72387 states and 77280 transitions. Word has length 1077 [2018-09-10 12:39:29,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:39:29,654 INFO L480 AbstractCegarLoop]: Abstraction has 72387 states and 77280 transitions. [2018-09-10 12:39:29,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:39:29,655 INFO L276 IsEmpty]: Start isEmpty. Operand 72387 states and 77280 transitions. [2018-09-10 12:39:29,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1086 [2018-09-10 12:39:29,695 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:39:29,696 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:39:29,696 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:39:29,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1336542797, now seen corresponding path program 1 times [2018-09-10 12:39:29,697 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:39:29,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:39:29,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:39:29,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:39:29,698 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:39:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:39:30,767 WARN L175 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 13 [2018-09-10 12:39:31,021 WARN L175 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-10 12:39:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 876 proven. 122 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-09-10 12:39:32,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:39:32,623 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:39:32,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:39:32,633 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:39:32,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:39:32,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:39:33,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 599 proven. 0 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2018-09-10 12:39:33,670 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:39:34,017 WARN L175 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-10 12:39:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 232 proven. 529 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2018-09-10 12:39:34,802 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:39:34,802 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 6] total 17 [2018-09-10 12:39:34,802 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:39:34,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:39:34,803 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:39:34,803 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2018-09-10 12:39:34,804 INFO L87 Difference]: Start difference. First operand 72387 states and 77280 transitions. Second operand 5 states. [2018-09-10 12:39:41,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:39:41,666 INFO L93 Difference]: Finished difference Result 171625 states and 184004 transitions. [2018-09-10 12:39:41,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 12:39:41,667 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1085 [2018-09-10 12:39:41,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:39:41,841 INFO L225 Difference]: With dead ends: 171625 [2018-09-10 12:39:41,842 INFO L226 Difference]: Without dead ends: 99244 [2018-09-10 12:39:41,913 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2189 GetRequests, 2164 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2018-09-10 12:39:41,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99244 states. [2018-09-10 12:39:42,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99244 to 93579. [2018-09-10 12:39:42,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93579 states. [2018-09-10 12:39:42,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93579 states to 93579 states and 100033 transitions. [2018-09-10 12:39:42,956 INFO L78 Accepts]: Start accepts. Automaton has 93579 states and 100033 transitions. Word has length 1085 [2018-09-10 12:39:42,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:39:42,956 INFO L480 AbstractCegarLoop]: Abstraction has 93579 states and 100033 transitions. [2018-09-10 12:39:42,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:39:42,957 INFO L276 IsEmpty]: Start isEmpty. Operand 93579 states and 100033 transitions. [2018-09-10 12:39:43,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1614 [2018-09-10 12:39:43,010 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:39:43,011 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:39:43,011 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:39:43,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1772159512, now seen corresponding path program 1 times [2018-09-10 12:39:43,011 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:39:43,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:39:43,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:39:43,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:39:43,013 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:39:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:39:44,474 WARN L175 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 13 [2018-09-10 12:39:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2203 backedges. 1526 proven. 122 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2018-09-10 12:39:46,656 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:39:46,656 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:39:46,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:39:46,666 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:39:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:39:47,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:39:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2203 backedges. 1594 proven. 2 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2018-09-10 12:39:48,341 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:39:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2203 backedges. 648 proven. 112 refuted. 0 times theorem prover too weak. 1443 trivial. 0 not checked. [2018-09-10 12:39:49,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:39:49,560 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 16 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 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:39:49,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:39:49,577 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:39:50,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:39:50,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:39:51,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2203 backedges. 1599 proven. 4 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-09-10 12:39:51,504 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:39:52,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2203 backedges. 648 proven. 112 refuted. 0 times theorem prover too weak. 1443 trivial. 0 not checked. [2018-09-10 12:39:52,784 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:39:52,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 5, 5] total 19 [2018-09-10 12:39:52,786 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:39:52,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-10 12:39:52,788 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-10 12:39:52,788 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2018-09-10 12:39:52,788 INFO L87 Difference]: Start difference. First operand 93579 states and 100033 transitions. Second operand 15 states. Received shutdown request... [2018-09-10 12:39:56,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:39:56,441 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 12:39:56,448 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 12:39:56,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 12:39:56 BoogieIcfgContainer [2018-09-10 12:39:56,448 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 12:39:56,449 INFO L168 Benchmark]: Toolchain (without parser) took 219001.22 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -262.6 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-09-10 12:39:56,450 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 12:39:56,450 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1839.26 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: 169.1 MB). Peak memory consumption was 169.1 MB. Max. memory is 7.1 GB. [2018-09-10 12:39:56,451 INFO L168 Benchmark]: Boogie Procedure Inliner took 168.36 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 12:39:56,452 INFO L168 Benchmark]: Boogie Preprocessor took 623.63 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 872.4 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 12:39:56,452 INFO L168 Benchmark]: RCFGBuilder took 8684.70 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 1.8 GB in the end (delta: 533.5 MB). Peak memory consumption was 533.5 MB. Max. memory is 7.1 GB. [2018-09-10 12:39:56,453 INFO L168 Benchmark]: TraceAbstraction took 207678.64 ms. Allocated memory was 2.4 GB in the beginning and 4.0 GB in the end (delta: 1.6 GB). Free memory was 1.8 GB in the beginning and 1.7 GB in the end (delta: 100.1 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-09-10 12:39:56,457 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 1839.26 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: 169.1 MB). Peak memory consumption was 169.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 168.36 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 623.63 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 872.4 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 8684.70 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 1.8 GB in the end (delta: 533.5 MB). Peak memory consumption was 533.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 207678.64 ms. Allocated memory was 2.4 GB in the beginning and 4.0 GB in the end (delta: 1.6 GB). Free memory was 1.8 GB in the beginning and 1.7 GB in the end (delta: 100.1 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 183]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 183). Cancelled while BasicCegarLoop was constructing difference of abstraction (93579states) and FLOYD_HOARE automaton (currently 7 states, 15 states before enhancement), while ReachableStatesComputation was computing reachable states (1161 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 775 locations, 1 error locations. TIMEOUT Result, 207.5s OverallTime, 15 OverallIterations, 7 TraceHistogramMax, 152.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3637 SDtfs, 45855 SDslu, 2567 SDs, 0 SdLazy, 89984 SolverSat, 19005 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 116.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20638 GetRequests, 20349 SyntacticMatches, 46 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 11.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93579occurred in iteration=14, 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: 13.8s AutomataMinimizationTime, 14 MinimizatonAttempts, 30424 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 5.0s SatisfiabilityAnalysisTime, 27.5s InterpolantComputationTime, 18128 NumberOfCodeBlocks, 18128 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 28254 ConstructedInterpolants, 64 QuantifiedInterpolants, 68802922 SizeOfPredicates, 11 NumberOfNonLiveVariables, 13880 ConjunctsInSsa, 105 ConjunctsInUnsatCore, 45 InterpolantComputations, 12 PerfectInterpolantSequences, 27279/30222 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_label21_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_12-39-56-471.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem18_label21_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_12-39-56-471.csv Completed graceful shutdown