java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label13_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 11:05:10,621 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 11:05:10,623 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 11:05:10,636 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 11:05:10,636 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 11:05:10,637 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 11:05:10,638 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 11:05:10,640 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 11:05:10,642 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 11:05:10,643 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 11:05:10,644 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 11:05:10,644 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 11:05:10,645 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 11:05:10,647 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 11:05:10,648 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 11:05:10,649 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 11:05:10,650 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 11:05:10,652 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 11:05:10,662 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 11:05:10,668 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 11:05:10,669 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 11:05:10,670 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 11:05:10,675 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 11:05:10,678 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 11:05:10,679 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 11:05:10,680 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 11:05:10,681 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 11:05:10,682 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 11:05:10,683 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 11:05:10,685 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 11:05:10,685 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 11:05:10,686 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 11:05:10,686 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 11:05:10,687 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 11:05:10,689 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 11:05:10,690 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 11:05:10,691 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-07-24 11:05:10,721 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 11:05:10,721 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 11:05:10,722 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 11:05:10,723 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 11:05:10,723 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 11:05:10,724 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 11:05:10,724 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 11:05:10,724 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 11:05:10,724 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 11:05:10,724 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 11:05:10,725 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 11:05:10,726 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 11:05:10,726 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 11:05:10,726 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 11:05:10,727 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 11:05:10,727 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 11:05:10,727 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 11:05:10,727 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 11:05:10,727 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 11:05:10,728 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 11:05:10,728 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 11:05:10,728 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 11:05:10,728 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 11:05:10,728 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 11:05:10,730 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 11:05:10,730 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 11:05:10,731 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 11:05:10,731 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 11:05:10,731 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 11:05:10,731 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 11:05:10,731 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 11:05:10,732 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 11:05:10,732 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 11:05:10,786 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 11:05:10,799 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 11:05:10,802 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 11:05:10,804 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 11:05:10,804 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 11:05:10,805 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label13_false-unreach-call.c [2018-07-24 11:05:11,158 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07775ba27/173f9204bf24495ba999f6e0ca004251/FLAG3ca20890f [2018-07-24 11:05:11,617 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 11:05:11,618 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label13_false-unreach-call.c [2018-07-24 11:05:11,651 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07775ba27/173f9204bf24495ba999f6e0ca004251/FLAG3ca20890f [2018-07-24 11:05:11,668 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07775ba27/173f9204bf24495ba999f6e0ca004251 [2018-07-24 11:05:11,680 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 11:05:11,682 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 11:05:11,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 11:05:11,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 11:05:11,691 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 11:05:11,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 11:05:11" (1/1) ... [2018-07-24 11:05:11,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a1cb37a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:05:11, skipping insertion in model container [2018-07-24 11:05:11,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 11:05:11" (1/1) ... [2018-07-24 11:05:12,062 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 11:05:13,230 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 11:05:13,249 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 11:05:14,274 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 11:05:14,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:05:14 WrapperNode [2018-07-24 11:05:14,431 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 11:05:14,432 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 11:05:14,432 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 11:05:14,432 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 11:05:14,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:05:14" (1/1) ... [2018-07-24 11:05:14,499 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:05:14" (1/1) ... [2018-07-24 11:05:14,567 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 11:05:14,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 11:05:14,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 11:05:14,568 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 11:05:14,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:05:14" (1/1) ... [2018-07-24 11:05:14,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:05:14" (1/1) ... [2018-07-24 11:05:14,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:05:14" (1/1) ... [2018-07-24 11:05:14,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:05:14" (1/1) ... [2018-07-24 11:05:15,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:05:14" (1/1) ... [2018-07-24 11:05:15,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:05:14" (1/1) ... [2018-07-24 11:05:15,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:05:14" (1/1) ... [2018-07-24 11:05:15,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 11:05:15,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 11:05:15,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 11:05:15,248 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 11:05:15,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:05:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 11:05:15,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 11:05:15,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 11:05:15,326 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output4 [2018-07-24 11:05:15,326 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output4 [2018-07-24 11:05:15,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 11:05:15,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 11:05:15,327 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 11:05:15,327 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 11:05:15,327 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output2 [2018-07-24 11:05:15,327 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output2 [2018-07-24 11:05:15,328 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output3 [2018-07-24 11:05:15,328 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output3 [2018-07-24 11:05:15,328 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 11:05:15,328 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 11:05:26,619 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 11:05:26,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 11:05:26 BoogieIcfgContainer [2018-07-24 11:05:26,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 11:05:26,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 11:05:26,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 11:05:26,624 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 11:05:26,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 11:05:11" (1/3) ... [2018-07-24 11:05:26,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c24af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 11:05:26, skipping insertion in model container [2018-07-24 11:05:26,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:05:14" (2/3) ... [2018-07-24 11:05:26,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c24af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 11:05:26, skipping insertion in model container [2018-07-24 11:05:26,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 11:05:26" (3/3) ... [2018-07-24 11:05:26,628 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem04_label13_false-unreach-call.c [2018-07-24 11:05:26,637 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 11:05:26,647 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 11:05:26,708 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 11:05:26,709 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 11:05:26,709 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 11:05:26,709 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 11:05:26,709 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 11:05:26,709 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 11:05:26,709 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 11:05:26,710 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 11:05:26,710 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 11:05:26,756 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states. [2018-07-24 11:05:26,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 792 [2018-07-24 11:05:26,813 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:05:26,815 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:05:26,816 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output4Err0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:05:26,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1336490285, now seen corresponding path program 1 times [2018-07-24 11:05:26,825 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:05:26,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:05:26,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:05:26,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:05:26,874 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:05:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:05:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:05:28,953 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:05:28,954 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 11:05:28,954 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:05:28,961 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 11:05:28,976 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 11:05:28,977 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 11:05:28,979 INFO L87 Difference]: Start difference. First operand 907 states. Second operand 3 states. [2018-07-24 11:05:36,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:05:36,749 INFO L93 Difference]: Finished difference Result 2647 states and 5102 transitions. [2018-07-24 11:05:36,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 11:05:36,753 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 791 [2018-07-24 11:05:36,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:05:36,792 INFO L225 Difference]: With dead ends: 2647 [2018-07-24 11:05:36,793 INFO L226 Difference]: Without dead ends: 1738 [2018-07-24 11:05:36,802 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 5 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 11:05:36,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2018-07-24 11:05:36,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1738. [2018-07-24 11:05:36,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1738 states. [2018-07-24 11:05:36,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 3169 transitions. [2018-07-24 11:05:36,955 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 3169 transitions. Word has length 791 [2018-07-24 11:05:36,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:05:36,959 INFO L471 AbstractCegarLoop]: Abstraction has 1738 states and 3169 transitions. [2018-07-24 11:05:36,959 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 11:05:36,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 3169 transitions. [2018-07-24 11:05:36,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 812 [2018-07-24 11:05:36,993 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:05:36,995 INFO L353 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:05:36,995 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output4Err0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:05:36,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1725761578, now seen corresponding path program 1 times [2018-07-24 11:05:36,996 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:05:36,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:05:36,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:05:36,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:05:36,998 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:05:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:05:37,846 WARN L169 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-07-24 11:05:38,209 WARN L169 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-07-24 11:05:38,422 WARN L169 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-07-24 11:05:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:05:39,158 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:05:39,158 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:05:39,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:05:39,167 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:05:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:05:39,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:05:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:05:40,505 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:05:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:05:41,677 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 11:05:41,678 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-07-24 11:05:41,678 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:05:41,680 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 11:05:41,681 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 11:05:41,681 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-07-24 11:05:41,681 INFO L87 Difference]: Start difference. First operand 1738 states and 3169 transitions. Second operand 3 states. [2018-07-24 11:05:49,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:05:49,053 INFO L93 Difference]: Finished difference Result 5140 states and 9490 transitions. [2018-07-24 11:05:49,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 11:05:49,059 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 811 [2018-07-24 11:05:49,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:05:49,080 INFO L225 Difference]: With dead ends: 5140 [2018-07-24 11:05:49,080 INFO L226 Difference]: Without dead ends: 3408 [2018-07-24 11:05:49,086 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1635 GetRequests, 1621 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-07-24 11:05:49,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2018-07-24 11:05:49,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 3408. [2018-07-24 11:05:49,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3408 states. [2018-07-24 11:05:49,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3408 states to 3408 states and 5907 transitions. [2018-07-24 11:05:49,183 INFO L78 Accepts]: Start accepts. Automaton has 3408 states and 5907 transitions. Word has length 811 [2018-07-24 11:05:49,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:05:49,185 INFO L471 AbstractCegarLoop]: Abstraction has 3408 states and 5907 transitions. [2018-07-24 11:05:49,185 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 11:05:49,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3408 states and 5907 transitions. [2018-07-24 11:05:49,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 814 [2018-07-24 11:05:49,204 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:05:49,205 INFO L353 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:05:49,206 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output4Err0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:05:49,206 INFO L82 PathProgramCache]: Analyzing trace with hash -2133578066, now seen corresponding path program 1 times [2018-07-24 11:05:49,206 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:05:49,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:05:49,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:05:49,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:05:49,208 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:05:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:05:49,563 WARN L169 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 11:05:50,219 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:05:50,220 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:05:50,220 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 11:05:50,220 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:05:50,222 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 11:05:50,222 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 11:05:50,222 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 11:05:50,222 INFO L87 Difference]: Start difference. First operand 3408 states and 5907 transitions. Second operand 6 states. [2018-07-24 11:05:59,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:05:59,498 INFO L93 Difference]: Finished difference Result 8618 states and 14850 transitions. [2018-07-24 11:05:59,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 11:05:59,508 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 813 [2018-07-24 11:05:59,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:05:59,541 INFO L225 Difference]: With dead ends: 8618 [2018-07-24 11:05:59,541 INFO L226 Difference]: Without dead ends: 5216 [2018-07-24 11:05:59,550 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 11:05:59,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5216 states. [2018-07-24 11:05:59,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5216 to 5196. [2018-07-24 11:05:59,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5196 states. [2018-07-24 11:05:59,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5196 states to 5196 states and 7775 transitions. [2018-07-24 11:05:59,705 INFO L78 Accepts]: Start accepts. Automaton has 5196 states and 7775 transitions. Word has length 813 [2018-07-24 11:05:59,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:05:59,706 INFO L471 AbstractCegarLoop]: Abstraction has 5196 states and 7775 transitions. [2018-07-24 11:05:59,706 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 11:05:59,706 INFO L276 IsEmpty]: Start isEmpty. Operand 5196 states and 7775 transitions. [2018-07-24 11:05:59,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 830 [2018-07-24 11:05:59,731 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:05:59,732 INFO L353 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:05:59,732 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output4Err0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:05:59,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1196054027, now seen corresponding path program 1 times [2018-07-24 11:05:59,733 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:05:59,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:05:59,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:05:59,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:05:59,736 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:05:59,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:06:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:06:00,610 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:06:00,610 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:06:00,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:06:00,630 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:06:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:06:01,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:06:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:06:01,669 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:06:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:06:02,072 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:06:02,072 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 11:06:02,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:06:02,103 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:06:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:06:02,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:06:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:06:03,634 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:06:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:06:03,940 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:06:03,941 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-07-24 11:06:03,941 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:06:03,943 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 11:06:03,943 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 11:06:03,944 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-07-24 11:06:03,944 INFO L87 Difference]: Start difference. First operand 5196 states and 7775 transitions. Second operand 9 states. [2018-07-24 11:06:19,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:06:19,254 INFO L93 Difference]: Finished difference Result 26461 states and 41529 transitions. [2018-07-24 11:06:19,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-24 11:06:19,255 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 829 [2018-07-24 11:06:19,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:06:19,348 INFO L225 Difference]: With dead ends: 26461 [2018-07-24 11:06:19,348 INFO L226 Difference]: Without dead ends: 21271 [2018-07-24 11:06:19,370 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3353 GetRequests, 3314 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2018-07-24 11:06:19,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21271 states. [2018-07-24 11:06:19,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21271 to 21127. [2018-07-24 11:06:19,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21127 states. [2018-07-24 11:06:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21127 states to 21127 states and 27722 transitions. [2018-07-24 11:06:19,896 INFO L78 Accepts]: Start accepts. Automaton has 21127 states and 27722 transitions. Word has length 829 [2018-07-24 11:06:19,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:06:19,897 INFO L471 AbstractCegarLoop]: Abstraction has 21127 states and 27722 transitions. [2018-07-24 11:06:19,897 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 11:06:19,897 INFO L276 IsEmpty]: Start isEmpty. Operand 21127 states and 27722 transitions. [2018-07-24 11:06:19,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1062 [2018-07-24 11:06:19,956 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:06:19,957 INFO L353 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:06:19,957 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output4Err0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:06:19,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1429861439, now seen corresponding path program 1 times [2018-07-24 11:06:19,958 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:06:19,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:06:19,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:06:19,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:06:19,960 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:06:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:06:20,970 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 290 proven. 165 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-07-24 11:06:20,970 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:06:20,971 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:06:20,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:06:20,978 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:06:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:06:21,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:06:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 398 proven. 2 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2018-07-24 11:06:21,962 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:06:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 398 proven. 2 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2018-07-24 11:06:22,998 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:06:22,999 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 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 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 11:06:23,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:06:23,017 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:06:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:06:24,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:06:24,554 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 398 proven. 2 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2018-07-24 11:06:24,554 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:06:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 398 proven. 2 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2018-07-24 11:06:25,173 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:06:25,174 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-07-24 11:06:25,174 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:06:25,176 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 11:06:25,177 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 11:06:25,177 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-07-24 11:06:25,177 INFO L87 Difference]: Start difference. First operand 21127 states and 27722 transitions. Second operand 9 states. [2018-07-24 11:06:44,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:06:44,283 INFO L93 Difference]: Finished difference Result 81681 states and 116371 transitions. [2018-07-24 11:06:44,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-24 11:06:44,285 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1061 [2018-07-24 11:06:44,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:06:44,521 INFO L225 Difference]: With dead ends: 81681 [2018-07-24 11:06:44,521 INFO L226 Difference]: Without dead ends: 60560 [2018-07-24 11:06:44,611 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4300 GetRequests, 4259 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=338, Invalid=1302, Unknown=0, NotChecked=0, Total=1640 [2018-07-24 11:06:44,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60560 states. [2018-07-24 11:06:45,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60560 to 60059. [2018-07-24 11:06:45,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60059 states. [2018-07-24 11:06:45,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60059 states to 60059 states and 76838 transitions. [2018-07-24 11:06:45,842 INFO L78 Accepts]: Start accepts. Automaton has 60059 states and 76838 transitions. Word has length 1061 [2018-07-24 11:06:45,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:06:45,843 INFO L471 AbstractCegarLoop]: Abstraction has 60059 states and 76838 transitions. [2018-07-24 11:06:45,843 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 11:06:45,843 INFO L276 IsEmpty]: Start isEmpty. Operand 60059 states and 76838 transitions. [2018-07-24 11:06:45,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1135 [2018-07-24 11:06:45,963 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:06:45,969 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:06:45,969 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output4Err0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:06:45,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1970571142, now seen corresponding path program 1 times [2018-07-24 11:06:45,970 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:06:45,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:06:45,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:06:45,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:06:45,971 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:06:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:06:46,693 WARN L169 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-07-24 11:06:46,971 WARN L169 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-07-24 11:06:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 388 proven. 50 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2018-07-24 11:06:47,818 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:06:47,818 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:06:47,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:06:47,825 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:06:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:06:48,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:06:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 527 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-07-24 11:06:49,598 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:06:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 527 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-07-24 11:06:50,656 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:06:50,656 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 11:06:50,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:06:50,674 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:06:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:06:51,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:06:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 527 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-07-24 11:06:52,543 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:06:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 527 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-07-24 11:06:53,177 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:06:53,178 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 16 [2018-07-24 11:06:53,178 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:06:53,181 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-24 11:06:53,181 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-24 11:06:53,181 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2018-07-24 11:06:53,183 INFO L87 Difference]: Start difference. First operand 60059 states and 76838 transitions. Second operand 10 states. [2018-07-24 11:06:55,487 WARN L169 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2018-07-24 11:07:11,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:07:11,537 INFO L93 Difference]: Finished difference Result 148170 states and 197300 transitions. [2018-07-24 11:07:11,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-07-24 11:07:11,538 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1134 [2018-07-24 11:07:11,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:07:12,170 INFO L225 Difference]: With dead ends: 148170 [2018-07-24 11:07:12,170 INFO L226 Difference]: Without dead ends: 88117 [2018-07-24 11:07:12,260 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4649 GetRequests, 4578 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=863, Invalid=4107, Unknown=0, NotChecked=0, Total=4970 [2018-07-24 11:07:12,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88117 states. [2018-07-24 11:07:13,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88117 to 87111. [2018-07-24 11:07:13,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87111 states. [2018-07-24 11:07:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87111 states to 87111 states and 106892 transitions. [2018-07-24 11:07:13,859 INFO L78 Accepts]: Start accepts. Automaton has 87111 states and 106892 transitions. Word has length 1134 [2018-07-24 11:07:13,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:07:13,860 INFO L471 AbstractCegarLoop]: Abstraction has 87111 states and 106892 transitions. [2018-07-24 11:07:13,860 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-24 11:07:13,860 INFO L276 IsEmpty]: Start isEmpty. Operand 87111 states and 106892 transitions. [2018-07-24 11:07:13,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1164 [2018-07-24 11:07:13,961 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:07:13,962 INFO L353 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:07:13,962 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output4Err0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:07:13,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1077171691, now seen corresponding path program 1 times [2018-07-24 11:07:13,963 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:07:13,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:07:13,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:07:13,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:07:13,964 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:07:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:07:14,377 WARN L169 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-07-24 11:07:14,713 WARN L169 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-07-24 11:07:14,943 WARN L169 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-07-24 11:07:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 371 proven. 187 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2018-07-24 11:07:16,497 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:07:16,497 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:07:16,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:07:16,504 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:07:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:07:16,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:07:17,531 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 292 proven. 2 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2018-07-24 11:07:17,532 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:07:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 388 proven. 144 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-07-24 11:07:18,480 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:07:18,480 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 11:07:18,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:07:18,497 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:07:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:07:19,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:07:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 292 proven. 2 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2018-07-24 11:07:20,334 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:07:20,895 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 388 proven. 144 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-07-24 11:07:20,897 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:07:20,899 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5, 5, 5] total 18 [2018-07-24 11:07:20,899 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:07:20,900 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 11:07:20,901 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 11:07:20,901 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2018-07-24 11:07:20,901 INFO L87 Difference]: Start difference. First operand 87111 states and 106892 transitions. Second operand 14 states. [2018-07-24 11:08:09,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:08:09,749 INFO L93 Difference]: Finished difference Result 404777 states and 540842 transitions. [2018-07-24 11:08:09,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-07-24 11:08:09,750 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1163 [2018-07-24 11:08:09,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:08:10,686 INFO L225 Difference]: With dead ends: 404777 [2018-07-24 11:08:10,686 INFO L226 Difference]: Without dead ends: 313012 [2018-07-24 11:08:10,819 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4764 GetRequests, 4692 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=876, Invalid=3680, Unknown=0, NotChecked=0, Total=4556 [2018-07-24 11:08:11,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313012 states. [2018-07-24 11:08:15,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313012 to 307767. [2018-07-24 11:08:15,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307767 states. [2018-07-24 11:08:16,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307767 states to 307767 states and 370426 transitions. [2018-07-24 11:08:16,095 INFO L78 Accepts]: Start accepts. Automaton has 307767 states and 370426 transitions. Word has length 1163 [2018-07-24 11:08:16,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:08:16,096 INFO L471 AbstractCegarLoop]: Abstraction has 307767 states and 370426 transitions. [2018-07-24 11:08:16,096 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-24 11:08:16,096 INFO L276 IsEmpty]: Start isEmpty. Operand 307767 states and 370426 transitions. [2018-07-24 11:08:16,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1341 [2018-07-24 11:08:16,405 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:08:16,406 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:08:16,407 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output4Err0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:08:16,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1472000168, now seen corresponding path program 1 times [2018-07-24 11:08:16,407 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:08:16,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:08:16,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:08:16,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:08:16,409 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:08:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:08:16,895 WARN L169 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 11:08:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 881 backedges. 543 proven. 333 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:08:18,861 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:08:18,861 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:08:18,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:08:18,870 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:08:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:08:19,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:08:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 881 backedges. 570 proven. 2 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2018-07-24 11:08:21,500 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:08:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 881 backedges. 649 proven. 108 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2018-07-24 11:08:22,875 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:08:22,875 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 11:08:22,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:08:22,893 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:08:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:08:24,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:08:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 881 backedges. 570 proven. 2 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2018-07-24 11:08:24,891 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:08:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 881 backedges. 649 proven. 108 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2018-07-24 11:08:25,685 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:08:25,686 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 20 [2018-07-24 11:08:25,686 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:08:25,688 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 11:08:25,689 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 11:08:25,689 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2018-07-24 11:08:25,689 INFO L87 Difference]: Start difference. First operand 307767 states and 370426 transitions. Second operand 13 states. [2018-07-24 11:08:48,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:08:48,236 INFO L93 Difference]: Finished difference Result 635619 states and 786680 transitions. [2018-07-24 11:08:48,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-24 11:08:48,236 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 1340 [2018-07-24 11:08:48,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:08:49,309 INFO L225 Difference]: With dead ends: 635619 [2018-07-24 11:08:49,310 INFO L226 Difference]: Without dead ends: 328693 [2018-07-24 11:08:49,620 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5435 GetRequests, 5381 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=555, Invalid=2201, Unknown=0, NotChecked=0, Total=2756 [2018-07-24 11:08:49,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328693 states. Received shutdown request... [2018-07-24 11:08:58,745 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 11:08:58,749 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 11:08:58,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 11:08:58 BoogieIcfgContainer [2018-07-24 11:08:58,750 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 11:08:58,751 INFO L168 Benchmark]: Toolchain (without parser) took 227069.99 ms. Allocated memory was 1.5 GB in the beginning and 5.3 GB in the end (delta: 3.8 GB). Free memory was 1.4 GB in the beginning and 4.1 GB in the end (delta: -2.7 GB). Peak memory consumption was 3.2 GB. Max. memory is 7.1 GB. [2018-07-24 11:08:58,752 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 11:08:58,752 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2748.02 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: 232.5 MB). Peak memory consumption was 232.5 MB. Max. memory is 7.1 GB. [2018-07-24 11:08:58,753 INFO L168 Benchmark]: Boogie Procedure Inliner took 135.52 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-24 11:08:58,755 INFO L168 Benchmark]: Boogie Preprocessor took 679.40 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 856.2 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 89.3 MB. Max. memory is 7.1 GB. [2018-07-24 11:08:58,759 INFO L168 Benchmark]: RCFGBuilder took 11372.76 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 165.2 MB). Free memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: -51.7 MB). Peak memory consumption was 724.0 MB. Max. memory is 7.1 GB. [2018-07-24 11:08:58,759 INFO L168 Benchmark]: TraceAbstraction took 212129.02 ms. Allocated memory was 2.6 GB in the beginning and 5.3 GB in the end (delta: 2.8 GB). Free memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: -1.8 GB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. [2018-07-24 11:08:58,766 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 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 2748.02 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: 232.5 MB). Peak memory consumption was 232.5 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 135.52 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 679.40 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 856.2 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 89.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 11372.76 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 165.2 MB). Free memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: -51.7 MB). Peak memory consumption was 724.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 212129.02 ms. Allocated memory was 2.6 GB in the beginning and 5.3 GB in the end (delta: 2.8 GB). Free memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: -1.8 GB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 4691]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 4691). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 907 locations, 1 error locations. TIMEOUT Result, 212.0s OverallTime, 8 OverallIterations, 7 TraceHistogramMax, 152.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1801 SDtfs, 75026 SDslu, 3625 SDs, 0 SdLazy, 89610 SolverSat, 36076 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 110.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24154 GetRequests, 23849 SyntacticMatches, 28 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4285 ImplicationChecksByTransitivity, 12.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=307767occurred in iteration=7, 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: 18.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 6916 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 7.5s SatisfiabilityAnalysisTime, 25.1s InterpolantComputationTime, 19807 NumberOfCodeBlocks, 19807 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 31642 ConstructedInterpolants, 0 QuantifiedInterpolants, 52869442 SizeOfPredicates, 8 NumberOfNonLiveVariables, 16953 ConjunctsInSsa, 70 ConjunctsInUnsatCore, 30 InterpolantComputations, 4 PerfectInterpolantSequences, 13305/14595 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/Problem04_label13_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_11-08-58-780.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem04_label13_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_11-08-58-780.csv Completed graceful shutdown