java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label25_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 10:36:06,519 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 10:36:06,523 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 10:36:06,540 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 10:36:06,541 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 10:36:06,543 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 10:36:06,544 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 10:36:06,547 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 10:36:06,549 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 10:36:06,551 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 10:36:06,552 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 10:36:06,552 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 10:36:06,554 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 10:36:06,556 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 10:36:06,557 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 10:36:06,558 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 10:36:06,561 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 10:36:06,569 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 10:36:06,571 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 10:36:06,573 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 10:36:06,578 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 10:36:06,580 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 10:36:06,589 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 10:36:06,589 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 10:36:06,589 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 10:36:06,590 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 10:36:06,591 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 10:36:06,592 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 10:36:06,593 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 10:36:06,594 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 10:36:06,597 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 10:36:06,598 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 10:36:06,599 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 10:36:06,599 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 10:36:06,601 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 10:36:06,601 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 10:36:06,602 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-10 10:36:06,629 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 10:36:06,629 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 10:36:06,631 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 10:36:06,631 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 10:36:06,631 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 10:36:06,631 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 10:36:06,631 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 10:36:06,632 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 10:36:06,632 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 10:36:06,632 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 10:36:06,632 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 10:36:06,633 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 10:36:06,633 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 10:36:06,633 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 10:36:06,633 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 10:36:06,633 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 10:36:06,634 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 10:36:06,634 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 10:36:06,634 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 10:36:06,634 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 10:36:06,634 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 10:36:06,635 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 10:36:06,635 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 10:36:06,635 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 10:36:06,635 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 10:36:06,636 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 10:36:06,636 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 10:36:06,636 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 10:36:06,636 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 10:36:06,636 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 10:36:06,637 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 10:36:06,637 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 10:36:06,637 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 10:36:06,689 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 10:36:06,703 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 10:36:06,707 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 10:36:06,709 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 10:36:06,710 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 10:36:06,711 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label25_true-unreach-call.c [2018-09-10 10:36:07,094 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f4628c7d/04ca20be5e5241ff88032b6126a0a5a7/FLAGf016f2480 [2018-09-10 10:36:07,552 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 10:36:07,555 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label25_true-unreach-call.c [2018-09-10 10:36:07,600 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f4628c7d/04ca20be5e5241ff88032b6126a0a5a7/FLAGf016f2480 [2018-09-10 10:36:07,619 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f4628c7d/04ca20be5e5241ff88032b6126a0a5a7 [2018-09-10 10:36:07,632 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 10:36:07,637 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 10:36:07,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 10:36:07,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 10:36:07,648 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 10:36:07,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:36:07" (1/1) ... [2018-09-10 10:36:07,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e6be67e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:36:07, skipping insertion in model container [2018-09-10 10:36:07,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:36:07" (1/1) ... [2018-09-10 10:36:08,025 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 10:36:09,066 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:36:09,093 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 10:36:09,886 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:36:10,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:36:10 WrapperNode [2018-09-10 10:36:10,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 10:36:10,058 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 10:36:10,058 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 10:36:10,058 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 10:36:10,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:36:10" (1/1) ... [2018-09-10 10:36:10,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:36:10" (1/1) ... [2018-09-10 10:36:10,232 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 10:36:10,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 10:36:10,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 10:36:10,234 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 10:36:10,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:36:10" (1/1) ... [2018-09-10 10:36:10,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:36:10" (1/1) ... [2018-09-10 10:36:10,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:36:10" (1/1) ... [2018-09-10 10:36:10,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:36:10" (1/1) ... [2018-09-10 10:36:10,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:36:10" (1/1) ... [2018-09-10 10:36:10,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:36:10" (1/1) ... [2018-09-10 10:36:10,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:36:10" (1/1) ... [2018-09-10 10:36:10,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 10:36:10,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 10:36:10,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 10:36:10,981 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 10:36:10,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:36:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 10:36:11,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 10:36:11,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 10:36:11,062 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-09-10 10:36:11,063 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-09-10 10:36:11,063 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output3 [2018-09-10 10:36:11,063 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output3 [2018-09-10 10:36:11,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 10:36:11,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 10:36:11,063 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4 [2018-09-10 10:36:11,064 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4 [2018-09-10 10:36:11,064 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 10:36:11,064 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 10:36:11,064 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-09-10 10:36:11,065 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-09-10 10:36:23,792 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 10:36:23,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:36:23 BoogieIcfgContainer [2018-09-10 10:36:23,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 10:36:23,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 10:36:23,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 10:36:23,798 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 10:36:23,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 10:36:07" (1/3) ... [2018-09-10 10:36:23,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40e0ed5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:36:23, skipping insertion in model container [2018-09-10 10:36:23,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:36:10" (2/3) ... [2018-09-10 10:36:23,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40e0ed5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:36:23, skipping insertion in model container [2018-09-10 10:36:23,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:36:23" (3/3) ... [2018-09-10 10:36:23,802 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem04_label25_true-unreach-call.c [2018-09-10 10:36:23,814 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 10:36:23,825 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 10:36:23,896 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 10:36:23,897 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 10:36:23,897 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 10:36:23,897 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 10:36:23,897 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 10:36:23,897 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 10:36:23,898 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 10:36:23,898 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 10:36:23,898 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 10:36:23,943 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states. [2018-09-10 10:36:24,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2018-09-10 10:36:24,025 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:36:24,028 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:36:24,030 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:36:24,038 INFO L82 PathProgramCache]: Analyzing trace with hash 778828332, now seen corresponding path program 1 times [2018-09-10 10:36:24,041 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:36:24,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:36:24,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:36:24,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:36:24,110 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:36:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:36:25,683 WARN L175 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:36:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:36:26,870 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:36:26,871 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 10:36:26,871 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:36:26,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:36:26,898 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:36:26,899 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:36:26,902 INFO L87 Difference]: Start difference. First operand 907 states. Second operand 3 states. [2018-09-10 10:36:34,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:36:34,500 INFO L93 Difference]: Finished difference Result 2647 states and 5102 transitions. [2018-09-10 10:36:34,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:36:34,505 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 810 [2018-09-10 10:36:34,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:36:34,551 INFO L225 Difference]: With dead ends: 2647 [2018-09-10 10:36:34,552 INFO L226 Difference]: Without dead ends: 1738 [2018-09-10 10:36:34,563 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 5 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:36:34,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2018-09-10 10:36:34,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1738. [2018-09-10 10:36:34,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1738 states. [2018-09-10 10:36:34,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 3121 transitions. [2018-09-10 10:36:34,738 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 3121 transitions. Word has length 810 [2018-09-10 10:36:34,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:36:34,741 INFO L480 AbstractCegarLoop]: Abstraction has 1738 states and 3121 transitions. [2018-09-10 10:36:34,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:36:34,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 3121 transitions. [2018-09-10 10:36:34,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2018-09-10 10:36:34,772 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:36:34,773 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:36:34,773 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:36:34,774 INFO L82 PathProgramCache]: Analyzing trace with hash -943679637, now seen corresponding path program 1 times [2018-09-10 10:36:34,774 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:36:34,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:36:34,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:36:34,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:36:34,776 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:36:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:36:35,170 WARN L175 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:36:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:36:35,653 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:36:35,653 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 10:36:35,653 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:36:35,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:36:35,658 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:36:35,658 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 10:36:35,659 INFO L87 Difference]: Start difference. First operand 1738 states and 3121 transitions. Second operand 6 states. [2018-09-10 10:36:46,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:36:46,069 INFO L93 Difference]: Finished difference Result 5353 states and 9715 transitions. [2018-09-10 10:36:46,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 10:36:46,070 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 869 [2018-09-10 10:36:46,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:36:46,094 INFO L225 Difference]: With dead ends: 5353 [2018-09-10 10:36:46,095 INFO L226 Difference]: Without dead ends: 3621 [2018-09-10 10:36:46,101 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-10 10:36:46,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3621 states. [2018-09-10 10:36:46,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3621 to 3589. [2018-09-10 10:36:46,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3589 states. [2018-09-10 10:36:46,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3589 states to 3589 states and 6080 transitions. [2018-09-10 10:36:46,211 INFO L78 Accepts]: Start accepts. Automaton has 3589 states and 6080 transitions. Word has length 869 [2018-09-10 10:36:46,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:36:46,212 INFO L480 AbstractCegarLoop]: Abstraction has 3589 states and 6080 transitions. [2018-09-10 10:36:46,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:36:46,212 INFO L276 IsEmpty]: Start isEmpty. Operand 3589 states and 6080 transitions. [2018-09-10 10:36:46,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 879 [2018-09-10 10:36:46,249 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:36:46,249 INFO L376 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, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:36:46,250 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:36:46,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1731806696, now seen corresponding path program 1 times [2018-09-10 10:36:46,250 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:36:46,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:36:46,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:36:46,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:36:46,252 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:36:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:36:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 69 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:36:47,539 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:36:47,539 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:36:47,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:36:47,559 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:36:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:36:47,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:36:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 69 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:36:48,962 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:36:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 69 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:36:50,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:36:50,104 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:36:50,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:36:50,122 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:36:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:36:50,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:36:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 69 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:36:52,214 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:36:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 69 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:36:53,216 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:36:53,217 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-09-10 10:36:53,217 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:36:53,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:36:53,220 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:36:53,220 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-09-10 10:36:53,221 INFO L87 Difference]: Start difference. First operand 3589 states and 6080 transitions. Second operand 9 states. [2018-09-10 10:37:18,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:37:18,389 INFO L93 Difference]: Finished difference Result 18490 states and 35466 transitions. [2018-09-10 10:37:18,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-10 10:37:18,391 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 878 [2018-09-10 10:37:18,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:37:18,511 INFO L225 Difference]: With dead ends: 18490 [2018-09-10 10:37:18,511 INFO L226 Difference]: Without dead ends: 14907 [2018-09-10 10:37:18,534 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3606 GetRequests, 3545 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=710, Invalid=3072, Unknown=0, NotChecked=0, Total=3782 [2018-09-10 10:37:18,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14907 states. [2018-09-10 10:37:19,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14907 to 14353. [2018-09-10 10:37:19,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14353 states. [2018-09-10 10:37:19,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14353 states to 14353 states and 20349 transitions. [2018-09-10 10:37:19,096 INFO L78 Accepts]: Start accepts. Automaton has 14353 states and 20349 transitions. Word has length 878 [2018-09-10 10:37:19,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:37:19,097 INFO L480 AbstractCegarLoop]: Abstraction has 14353 states and 20349 transitions. [2018-09-10 10:37:19,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:37:19,098 INFO L276 IsEmpty]: Start isEmpty. Operand 14353 states and 20349 transitions. [2018-09-10 10:37:19,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 890 [2018-09-10 10:37:19,179 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:37:19,180 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 10:37:19,181 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:37:19,181 INFO L82 PathProgramCache]: Analyzing trace with hash 115602243, now seen corresponding path program 1 times [2018-09-10 10:37:19,182 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:37:19,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:37:19,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:37:19,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:37:19,183 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:37:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:37:19,594 WARN L175 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:37:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:37:20,453 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:37:20,454 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 10:37:20,454 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:37:20,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:37:20,455 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:37:20,455 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 10:37:20,455 INFO L87 Difference]: Start difference. First operand 14353 states and 20349 transitions. Second operand 6 states. [2018-09-10 10:37:27,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:37:27,866 INFO L93 Difference]: Finished difference Result 36254 states and 54022 transitions. [2018-09-10 10:37:27,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 10:37:27,879 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 889 [2018-09-10 10:37:27,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:37:27,972 INFO L225 Difference]: With dead ends: 36254 [2018-09-10 10:37:27,972 INFO L226 Difference]: Without dead ends: 21907 [2018-09-10 10:37:28,026 INFO L604 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 [2018-09-10 10:37:28,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21907 states. [2018-09-10 10:37:28,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21907 to 21702. [2018-09-10 10:37:28,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21702 states. [2018-09-10 10:37:28,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21702 states to 21702 states and 29733 transitions. [2018-09-10 10:37:28,581 INFO L78 Accepts]: Start accepts. Automaton has 21702 states and 29733 transitions. Word has length 889 [2018-09-10 10:37:28,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:37:28,582 INFO L480 AbstractCegarLoop]: Abstraction has 21702 states and 29733 transitions. [2018-09-10 10:37:28,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:37:28,582 INFO L276 IsEmpty]: Start isEmpty. Operand 21702 states and 29733 transitions. [2018-09-10 10:37:28,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 910 [2018-09-10 10:37:28,668 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:37:28,669 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:37:28,669 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:37:28,670 INFO L82 PathProgramCache]: Analyzing trace with hash 2095782912, now seen corresponding path program 1 times [2018-09-10 10:37:28,670 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:37:28,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:37:28,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:37:28,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:37:28,671 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:37:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:37:30,141 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:37:30,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:37:30,142 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:37:30,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:37:30,157 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:37:30,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:37:30,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:37:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:37:31,162 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:37:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:37:31,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:37:31,847 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:37:31,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:37:31,863 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:37:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:37:32,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:37:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-09-10 10:37:33,245 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:37:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-09-10 10:37:33,757 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 3 imperfect interpolant sequences. [2018-09-10 10:37:33,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 5, 5] total 17 [2018-09-10 10:37:33,758 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:37:33,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:37:33,760 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:37:33,760 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-10 10:37:33,760 INFO L87 Difference]: Start difference. First operand 21702 states and 29733 transitions. Second operand 5 states. [2018-09-10 10:37:40,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:37:40,788 INFO L93 Difference]: Finished difference Result 51319 states and 75583 transitions. [2018-09-10 10:37:40,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 10:37:40,792 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 909 [2018-09-10 10:37:40,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:37:40,903 INFO L225 Difference]: With dead ends: 51319 [2018-09-10 10:37:40,903 INFO L226 Difference]: Without dead ends: 29623 [2018-09-10 10:37:40,964 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3641 GetRequests, 3624 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2018-09-10 10:37:40,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29623 states. [2018-09-10 10:37:41,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29623 to 29505. [2018-09-10 10:37:41,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29505 states. [2018-09-10 10:37:41,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29505 states to 29505 states and 40216 transitions. [2018-09-10 10:37:41,568 INFO L78 Accepts]: Start accepts. Automaton has 29505 states and 40216 transitions. Word has length 909 [2018-09-10 10:37:41,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:37:41,569 INFO L480 AbstractCegarLoop]: Abstraction has 29505 states and 40216 transitions. [2018-09-10 10:37:41,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:37:41,569 INFO L276 IsEmpty]: Start isEmpty. Operand 29505 states and 40216 transitions. [2018-09-10 10:37:41,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 961 [2018-09-10 10:37:41,708 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:37:41,709 INFO L376 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:37:41,710 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:37:41,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1018366460, now seen corresponding path program 1 times [2018-09-10 10:37:41,710 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:37:41,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:37:41,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:37:41,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:37:41,712 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:37:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:37:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:37:43,077 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:37:43,077 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:37:43,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:37:43,098 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:37:43,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:37:43,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:37:44,127 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:37:44,127 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:37:44,673 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:37:44,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:37:44,695 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:37:44,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:37:44,711 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:37:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:37:45,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:37:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:37:46,386 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:37:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:37:46,876 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:37:46,878 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-09-10 10:37:46,878 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:37:46,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:37:46,880 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:37:46,880 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-09-10 10:37:46,881 INFO L87 Difference]: Start difference. First operand 29505 states and 40216 transitions. Second operand 9 states. [2018-09-10 10:38:05,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:38:05,281 INFO L93 Difference]: Finished difference Result 132565 states and 225656 transitions. [2018-09-10 10:38:05,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-10 10:38:05,281 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 960 [2018-09-10 10:38:05,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:38:05,742 INFO L225 Difference]: With dead ends: 132565 [2018-09-10 10:38:05,742 INFO L226 Difference]: Without dead ends: 88419 [2018-09-10 10:38:05,973 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3889 GetRequests, 3847 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=376, Invalid=1430, Unknown=0, NotChecked=0, Total=1806 [2018-09-10 10:38:06,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88419 states. [2018-09-10 10:38:08,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88419 to 85074. [2018-09-10 10:38:08,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85074 states. [2018-09-10 10:38:08,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85074 states to 85074 states and 98624 transitions. [2018-09-10 10:38:08,451 INFO L78 Accepts]: Start accepts. Automaton has 85074 states and 98624 transitions. Word has length 960 [2018-09-10 10:38:08,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:38:08,451 INFO L480 AbstractCegarLoop]: Abstraction has 85074 states and 98624 transitions. [2018-09-10 10:38:08,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:38:08,452 INFO L276 IsEmpty]: Start isEmpty. Operand 85074 states and 98624 transitions. [2018-09-10 10:38:08,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1015 [2018-09-10 10:38:08,559 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:38:08,560 INFO L376 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:38:08,560 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:38:08,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1006796331, now seen corresponding path program 1 times [2018-09-10 10:38:08,561 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:38:08,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:38:08,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:38:08,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:38:08,562 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:38:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:38:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 218 proven. 74 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-10 10:38:10,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:38:10,084 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:38:10,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:38:10,093 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:38:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:38:10,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:38:11,123 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 291 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-09-10 10:38:11,123 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:38:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 291 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-09-10 10:38:11,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:38:11,986 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:38:12,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:38:12,005 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:38:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:38:12,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:38:13,736 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 233 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-09-10 10:38:13,736 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:38:14,664 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 233 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-09-10 10:38:14,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:38:14,670 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-10 10:38:14,670 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:38:14,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:38:14,672 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:38:14,672 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-10 10:38:14,672 INFO L87 Difference]: Start difference. First operand 85074 states and 98624 transitions. Second operand 9 states. [2018-09-10 10:38:32,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:38:32,917 INFO L93 Difference]: Finished difference Result 263082 states and 312070 transitions. [2018-09-10 10:38:32,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-10 10:38:32,917 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1014 [2018-09-10 10:38:32,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:38:33,471 INFO L225 Difference]: With dead ends: 263082 [2018-09-10 10:38:33,472 INFO L226 Difference]: Without dead ends: 176052 [2018-09-10 10:38:33,684 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4098 GetRequests, 4062 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2018-09-10 10:38:33,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176052 states. [2018-09-10 10:38:37,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176052 to 174900. [2018-09-10 10:38:37,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174900 states. [2018-09-10 10:38:37,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174900 states to 174900 states and 196574 transitions. [2018-09-10 10:38:37,455 INFO L78 Accepts]: Start accepts. Automaton has 174900 states and 196574 transitions. Word has length 1014 [2018-09-10 10:38:37,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:38:37,455 INFO L480 AbstractCegarLoop]: Abstraction has 174900 states and 196574 transitions. [2018-09-10 10:38:37,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:38:37,455 INFO L276 IsEmpty]: Start isEmpty. Operand 174900 states and 196574 transitions. [2018-09-10 10:38:37,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1046 [2018-09-10 10:38:37,617 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:38:37,618 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:38:37,618 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:38:37,619 INFO L82 PathProgramCache]: Analyzing trace with hash 335399640, now seen corresponding path program 1 times [2018-09-10 10:38:37,619 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:38:37,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:38:37,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:38:37,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:38:37,620 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:38:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:38:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 336 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:38:39,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:38:39,740 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:38:39,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:38:39,748 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:38:40,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:38:40,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:38:40,728 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 336 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:38:40,728 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:38:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 336 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:38:42,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:38:42,065 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:38:42,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:38:42,083 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:38:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:38:43,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:38:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 336 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:38:44,258 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:38:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 336 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:38:44,820 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:38:44,821 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-09-10 10:38:44,822 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:38:44,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:38:44,824 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:38:44,825 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2018-09-10 10:38:44,825 INFO L87 Difference]: Start difference. First operand 174900 states and 196574 transitions. Second operand 9 states. [2018-09-10 10:39:05,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:39:05,536 INFO L93 Difference]: Finished difference Result 388951 states and 445248 transitions. [2018-09-10 10:39:05,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-10 10:39:05,537 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1045 [2018-09-10 10:39:05,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:39:06,212 INFO L225 Difference]: With dead ends: 388951 [2018-09-10 10:39:06,213 INFO L226 Difference]: Without dead ends: 208269 [2018-09-10 10:39:06,614 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4240 GetRequests, 4188 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=539, Invalid=2113, Unknown=0, NotChecked=0, Total=2652 [2018-09-10 10:39:06,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208269 states. [2018-09-10 10:39:10,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208269 to 207605. [2018-09-10 10:39:10,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207605 states. [2018-09-10 10:39:11,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207605 states to 207605 states and 229212 transitions. [2018-09-10 10:39:11,114 INFO L78 Accepts]: Start accepts. Automaton has 207605 states and 229212 transitions. Word has length 1045 [2018-09-10 10:39:11,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:39:11,115 INFO L480 AbstractCegarLoop]: Abstraction has 207605 states and 229212 transitions. [2018-09-10 10:39:11,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:39:11,115 INFO L276 IsEmpty]: Start isEmpty. Operand 207605 states and 229212 transitions. [2018-09-10 10:39:11,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1375 [2018-09-10 10:39:11,245 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:39:11,246 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-10 10:39:11,247 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:39:11,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1197476105, now seen corresponding path program 1 times [2018-09-10 10:39:11,247 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:39:11,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:39:11,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:39:11,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:39:11,249 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:39:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:39:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 558 proven. 0 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2018-09-10 10:39:14,680 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:39:14,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-10 10:39:14,681 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:39:14,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 10:39:14,682 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 10:39:14,682 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 10:39:14,682 INFO L87 Difference]: Start difference. First operand 207605 states and 229212 transitions. Second operand 4 states. [2018-09-10 10:39:26,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:39:26,140 INFO L93 Difference]: Finished difference Result 398363 states and 440743 transitions. [2018-09-10 10:39:26,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 10:39:26,141 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1374 [2018-09-10 10:39:26,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:39:26,663 INFO L225 Difference]: With dead ends: 398363 [2018-09-10 10:39:26,663 INFO L226 Difference]: Without dead ends: 191599 [2018-09-10 10:39:26,974 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 10:39:27,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191599 states. [2018-09-10 10:39:29,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191599 to 190762. [2018-09-10 10:39:29,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190762 states. [2018-09-10 10:39:30,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190762 states to 190762 states and 204516 transitions. [2018-09-10 10:39:30,100 INFO L78 Accepts]: Start accepts. Automaton has 190762 states and 204516 transitions. Word has length 1374 [2018-09-10 10:39:30,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:39:30,102 INFO L480 AbstractCegarLoop]: Abstraction has 190762 states and 204516 transitions. [2018-09-10 10:39:30,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 10:39:30,102 INFO L276 IsEmpty]: Start isEmpty. Operand 190762 states and 204516 transitions. [2018-09-10 10:39:30,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1640 [2018-09-10 10:39:30,269 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:39:30,270 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 10:39:30,270 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:39:30,271 INFO L82 PathProgramCache]: Analyzing trace with hash 875491435, now seen corresponding path program 1 times [2018-09-10 10:39:30,271 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:39:30,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:39:30,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:39:30,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:39:30,272 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:39:30,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:39:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 868 proven. 50 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2018-09-10 10:39:33,217 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:39:33,217 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:39:33,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:39:33,224 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:39:33,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:39:33,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:39:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 820 proven. 0 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-09-10 10:39:35,204 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:39:36,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 820 proven. 0 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-09-10 10:39:36,610 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 10:39:36,610 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-09-10 10:39:36,610 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:39:36,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:39:36,612 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:39:36,612 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-09-10 10:39:36,612 INFO L87 Difference]: Start difference. First operand 190762 states and 204516 transitions. Second operand 3 states. Received shutdown request... [2018-09-10 10:39:38,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:39:38,892 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 10:39:38,900 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 10:39:38,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 10:39:38 BoogieIcfgContainer [2018-09-10 10:39:38,900 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 10:39:38,901 INFO L168 Benchmark]: Toolchain (without parser) took 211268.16 ms. Allocated memory was 1.5 GB in the beginning and 4.7 GB in the end (delta: 3.2 GB). Free memory was 1.4 GB in the beginning and 3.0 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-09-10 10:39:38,902 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-10 10:39:38,903 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2418.56 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: 222.0 MB). Peak memory consumption was 222.0 MB. Max. memory is 7.1 GB. [2018-09-10 10:39:38,904 INFO L168 Benchmark]: Boogie Procedure Inliner took 175.03 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. [2018-09-10 10:39:38,904 INFO L168 Benchmark]: Boogie Preprocessor took 746.24 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 806.4 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 85.0 MB. Max. memory is 7.1 GB. [2018-09-10 10:39:38,905 INFO L168 Benchmark]: RCFGBuilder took 12812.59 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 191.9 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -85.5 MB). Peak memory consumption was 723.6 MB. Max. memory is 7.1 GB. [2018-09-10 10:39:38,906 INFO L168 Benchmark]: TraceAbstraction took 195106.58 ms. Allocated memory was 2.5 GB in the beginning and 4.7 GB in the end (delta: 2.2 GB). Free memory was 2.3 GB in the beginning and 3.0 GB in the end (delta: -718.6 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-09-10 10:39:38,915 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2418.56 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: 222.0 MB). Peak memory consumption was 222.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 175.03 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 746.24 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 806.4 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 85.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 12812.59 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 191.9 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -85.5 MB). Peak memory consumption was 723.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 195106.58 ms. Allocated memory was 2.5 GB in the beginning and 4.7 GB in the end (delta: 2.2 GB). Free memory was 2.3 GB in the beginning and 3.0 GB in the end (delta: -718.6 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 4748]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 4748). Cancelled while BasicCegarLoop was constructing difference of abstraction (190762states) and FLOYD_HOARE automaton (currently 3 states, 3 states before enhancement), while ReachableStatesComputation was computing reachable states (15274 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 907 locations, 1 error locations. TIMEOUT Result, 195.0s OverallTime, 10 OverallIterations, 4 TraceHistogramMax, 132.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2529 SDtfs, 49458 SDslu, 3070 SDs, 0 SdLazy, 79949 SolverSat, 20358 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 93.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22795 GetRequests, 22552 SyntacticMatches, 18 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 8.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=207605occurred in iteration=8, 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: 15.8s AutomataMinimizationTime, 9 MinimizatonAttempts, 6907 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.2s SsaConstructionTime, 7.2s SatisfiabilityAnalysisTime, 25.9s InterpolantComputationTime, 21638 NumberOfCodeBlocks, 21638 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 32857 ConstructedInterpolants, 0 QuantifiedInterpolants, 58693583 SizeOfPredicates, 10 NumberOfNonLiveVariables, 15656 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 32 InterpolantComputations, 8 PerfectInterpolantSequences, 9076/9248 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_label25_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_10-39-38-929.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem04_label25_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_10-39-38-929.csv Completed graceful shutdown