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/Problem16_label28_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 12:19:07,766 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 12:19:07,768 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 12:19:07,779 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 12:19:07,780 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 12:19:07,781 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 12:19:07,782 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 12:19:07,783 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 12:19:07,785 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 12:19:07,786 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 12:19:07,788 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 12:19:07,788 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 12:19:07,789 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 12:19:07,792 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 12:19:07,793 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 12:19:07,801 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 12:19:07,802 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 12:19:07,806 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 12:19:07,808 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 12:19:07,810 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 12:19:07,813 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 12:19:07,814 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 12:19:07,818 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 12:19:07,819 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 12:19:07,820 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 12:19:07,821 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 12:19:07,822 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 12:19:07,822 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 12:19:07,823 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 12:19:07,824 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 12:19:07,825 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 12:19:07,825 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 12:19:07,828 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 12:19:07,828 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 12:19:07,829 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 12:19:07,830 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 12:19:07,830 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-10 12:19:07,857 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 12:19:07,860 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 12:19:07,861 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 12:19:07,861 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 12:19:07,861 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 12:19:07,861 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 12:19:07,862 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 12:19:07,862 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 12:19:07,862 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 12:19:07,862 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 12:19:07,862 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 12:19:07,863 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 12:19:07,863 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 12:19:07,863 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 12:19:07,863 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 12:19:07,864 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 12:19:07,864 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 12:19:07,864 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 12:19:07,864 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 12:19:07,865 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 12:19:07,865 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 12:19:07,865 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 12:19:07,866 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 12:19:07,866 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 12:19:07,866 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 12:19:07,866 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 12:19:07,866 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 12:19:07,867 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 12:19:07,867 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 12:19:07,867 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 12:19:07,867 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 12:19:07,867 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 12:19:07,867 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 12:19:07,934 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 12:19:07,950 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 12:19:07,957 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 12:19:07,959 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 12:19:07,960 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 12:19:07,960 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label28_true-unreach-call.c [2018-09-10 12:19:08,327 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d16bc8cd2/59b76e16dbc24027be02719a64424e54/FLAG3a23fbf68 [2018-09-10 12:19:08,693 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 12:19:08,694 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label28_true-unreach-call.c [2018-09-10 12:19:08,722 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d16bc8cd2/59b76e16dbc24027be02719a64424e54/FLAG3a23fbf68 [2018-09-10 12:19:08,743 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d16bc8cd2/59b76e16dbc24027be02719a64424e54 [2018-09-10 12:19:08,756 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 12:19:08,761 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 12:19:08,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 12:19:08,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 12:19:08,770 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 12:19:08,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:19:08" (1/1) ... [2018-09-10 12:19:08,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65d96ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:08, skipping insertion in model container [2018-09-10 12:19:08,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:19:08" (1/1) ... [2018-09-10 12:19:09,051 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 12:19:09,590 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:19:09,607 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 12:19:09,890 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:19:09,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:09 WrapperNode [2018-09-10 12:19:09,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 12:19:09,977 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 12:19:09,977 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 12:19:09,977 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 12:19:09,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:09" (1/1) ... [2018-09-10 12:19:10,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:09" (1/1) ... [2018-09-10 12:19:10,185 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 12:19:10,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 12:19:10,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 12:19:10,186 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 12:19:10,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:09" (1/1) ... [2018-09-10 12:19:10,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:09" (1/1) ... [2018-09-10 12:19:10,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:09" (1/1) ... [2018-09-10 12:19:10,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:09" (1/1) ... [2018-09-10 12:19:10,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:09" (1/1) ... [2018-09-10 12:19:10,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:09" (1/1) ... [2018-09-10 12:19:10,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:09" (1/1) ... [2018-09-10 12:19:10,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 12:19:10,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 12:19:10,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 12:19:10,608 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 12:19:10,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 12:19:10,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 12:19:10,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 12:19:10,678 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-09-10 12:19:10,678 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-09-10 12:19:10,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 12:19:10,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 12:19:10,679 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 12:19:10,679 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 12:19:10,679 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-09-10 12:19:10,679 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-09-10 12:19:16,937 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 12:19:16,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:19:16 BoogieIcfgContainer [2018-09-10 12:19:16,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 12:19:16,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 12:19:16,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 12:19:16,942 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 12:19:16,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 12:19:08" (1/3) ... [2018-09-10 12:19:16,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4274941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:19:16, skipping insertion in model container [2018-09-10 12:19:16,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:09" (2/3) ... [2018-09-10 12:19:16,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4274941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:19:16, skipping insertion in model container [2018-09-10 12:19:16,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:19:16" (3/3) ... [2018-09-10 12:19:16,947 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label28_true-unreach-call.c [2018-09-10 12:19:16,957 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 12:19:16,966 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 12:19:17,023 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 12:19:17,024 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 12:19:17,024 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 12:19:17,024 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 12:19:17,025 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 12:19:17,025 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 12:19:17,025 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 12:19:17,025 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 12:19:17,025 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 12:19:17,057 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-09-10 12:19:17,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-10 12:19:17,074 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:19:17,075 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] [2018-09-10 12:19:17,077 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:19:17,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1219174681, now seen corresponding path program 1 times [2018-09-10 12:19:17,085 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:19:17,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:19:17,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:19:17,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:19:17,136 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:19:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:19:17,673 WARN L175 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:19:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:19:17,819 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:19:17,820 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 12:19:17,820 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:19:17,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:19:17,842 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:19:17,843 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:19:17,846 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 3 states. [2018-09-10 12:19:21,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:19:21,562 INFO L93 Difference]: Finished difference Result 1156 states and 2144 transitions. [2018-09-10 12:19:21,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:19:21,565 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 73 [2018-09-10 12:19:21,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:19:21,587 INFO L225 Difference]: With dead ends: 1156 [2018-09-10 12:19:21,588 INFO L226 Difference]: Without dead ends: 744 [2018-09-10 12:19:21,598 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:19:21,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2018-09-10 12:19:21,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2018-09-10 12:19:21,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-09-10 12:19:21,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1355 transitions. [2018-09-10 12:19:21,697 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1355 transitions. Word has length 73 [2018-09-10 12:19:21,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:19:21,699 INFO L480 AbstractCegarLoop]: Abstraction has 744 states and 1355 transitions. [2018-09-10 12:19:21,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:19:21,699 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1355 transitions. [2018-09-10 12:19:21,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-10 12:19:21,709 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:19:21,709 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:19:21,710 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:19:21,710 INFO L82 PathProgramCache]: Analyzing trace with hash 627780590, now seen corresponding path program 1 times [2018-09-10 12:19:21,710 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:19:21,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:19:21,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:19:21,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:19:21,712 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:19:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:19:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:19:22,030 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:19:22,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-10 12:19:22,030 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:19:22,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:19:22,033 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:19:22,033 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-10 12:19:22,034 INFO L87 Difference]: Start difference. First operand 744 states and 1355 transitions. Second operand 5 states. [2018-09-10 12:19:29,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:19:29,554 INFO L93 Difference]: Finished difference Result 2189 states and 4061 transitions. [2018-09-10 12:19:29,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:19:29,556 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2018-09-10 12:19:29,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:19:29,568 INFO L225 Difference]: With dead ends: 2189 [2018-09-10 12:19:29,568 INFO L226 Difference]: Without dead ends: 1451 [2018-09-10 12:19:29,572 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-10 12:19:29,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2018-09-10 12:19:29,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1441. [2018-09-10 12:19:29,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1441 states. [2018-09-10 12:19:29,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 2402 transitions. [2018-09-10 12:19:29,644 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 2402 transitions. Word has length 145 [2018-09-10 12:19:29,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:19:29,645 INFO L480 AbstractCegarLoop]: Abstraction has 1441 states and 2402 transitions. [2018-09-10 12:19:29,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:19:29,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 2402 transitions. [2018-09-10 12:19:29,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-10 12:19:29,649 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:19:29,649 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:19:29,650 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:19:29,650 INFO L82 PathProgramCache]: Analyzing trace with hash 2116330849, now seen corresponding path program 1 times [2018-09-10 12:19:29,650 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:19:29,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:19:29,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:19:29,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:19:29,652 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:19:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:19:30,005 WARN L175 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:19:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-10 12:19:30,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:19:30,245 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:19:30,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:19:30,262 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:19:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:19:30,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:19:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:19:30,569 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:19:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:19:30,801 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 12:19:30,801 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2018-09-10 12:19:30,801 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:19:30,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:19:30,802 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:19:30,803 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:19:30,803 INFO L87 Difference]: Start difference. First operand 1441 states and 2402 transitions. Second operand 3 states. [2018-09-10 12:19:35,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:19:35,036 INFO L93 Difference]: Finished difference Result 3559 states and 5861 transitions. [2018-09-10 12:19:35,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:19:35,037 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 174 [2018-09-10 12:19:35,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:19:35,052 INFO L225 Difference]: With dead ends: 3559 [2018-09-10 12:19:35,053 INFO L226 Difference]: Without dead ends: 2124 [2018-09-10 12:19:35,062 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 347 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:19:35,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2018-09-10 12:19:35,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 2124. [2018-09-10 12:19:35,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2124 states. [2018-09-10 12:19:35,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 3333 transitions. [2018-09-10 12:19:35,200 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 3333 transitions. Word has length 174 [2018-09-10 12:19:35,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:19:35,201 INFO L480 AbstractCegarLoop]: Abstraction has 2124 states and 3333 transitions. [2018-09-10 12:19:35,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:19:35,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 3333 transitions. [2018-09-10 12:19:35,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-09-10 12:19:35,206 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:19:35,206 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:19:35,206 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:19:35,207 INFO L82 PathProgramCache]: Analyzing trace with hash -892902266, now seen corresponding path program 1 times [2018-09-10 12:19:35,207 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:19:35,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:19:35,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:19:35,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:19:35,208 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:19:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:19:35,542 WARN L175 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:19:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:19:35,962 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:19:35,962 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 12:19:35,962 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:19:35,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:19:35,963 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:19:35,964 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:19:35,965 INFO L87 Difference]: Start difference. First operand 2124 states and 3333 transitions. Second operand 6 states. [2018-09-10 12:19:39,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:19:39,528 INFO L93 Difference]: Finished difference Result 4961 states and 7702 transitions. [2018-09-10 12:19:39,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:19:39,528 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 189 [2018-09-10 12:19:39,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:19:39,546 INFO L225 Difference]: With dead ends: 4961 [2018-09-10 12:19:39,546 INFO L226 Difference]: Without dead ends: 2843 [2018-09-10 12:19:39,555 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 12:19:39,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2843 states. [2018-09-10 12:19:39,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2843 to 2821. [2018-09-10 12:19:39,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2821 states. [2018-09-10 12:19:39,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2821 states to 2821 states and 3930 transitions. [2018-09-10 12:19:39,635 INFO L78 Accepts]: Start accepts. Automaton has 2821 states and 3930 transitions. Word has length 189 [2018-09-10 12:19:39,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:19:39,636 INFO L480 AbstractCegarLoop]: Abstraction has 2821 states and 3930 transitions. [2018-09-10 12:19:39,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:19:39,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2821 states and 3930 transitions. [2018-09-10 12:19:39,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-09-10 12:19:39,646 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:19:39,646 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:19:39,646 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:19:39,647 INFO L82 PathProgramCache]: Analyzing trace with hash 892910639, now seen corresponding path program 1 times [2018-09-10 12:19:39,647 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:19:39,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:19:39,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:19:39,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:19:39,649 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:19:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:19:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 246 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:19:40,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:19:40,065 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:19:40,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:19:40,073 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:19:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:19:40,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:19:40,402 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 246 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:19:40,402 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:19:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 246 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:19:40,758 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:19:40,758 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:19:40,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:19:40,776 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:19:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:19:41,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:19:41,165 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 246 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:19:41,165 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:19:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 246 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:19:41,482 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:19:41,482 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-09-10 12:19:41,482 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:19:41,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:19:41,486 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:19:41,486 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:19:41,488 INFO L87 Difference]: Start difference. First operand 2821 states and 3930 transitions. Second operand 9 states. [2018-09-10 12:19:48,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:19:48,675 INFO L93 Difference]: Finished difference Result 7877 states and 11517 transitions. [2018-09-10 12:19:48,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-10 12:19:48,677 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 319 [2018-09-10 12:19:48,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:19:48,708 INFO L225 Difference]: With dead ends: 7877 [2018-09-10 12:19:48,708 INFO L226 Difference]: Without dead ends: 5062 [2018-09-10 12:19:48,735 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1295 GetRequests, 1273 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2018-09-10 12:19:48,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5062 states. [2018-09-10 12:19:48,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5062 to 5010. [2018-09-10 12:19:48,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5010 states. [2018-09-10 12:19:48,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5010 states to 5010 states and 6376 transitions. [2018-09-10 12:19:48,871 INFO L78 Accepts]: Start accepts. Automaton has 5010 states and 6376 transitions. Word has length 319 [2018-09-10 12:19:48,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:19:48,872 INFO L480 AbstractCegarLoop]: Abstraction has 5010 states and 6376 transitions. [2018-09-10 12:19:48,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:19:48,872 INFO L276 IsEmpty]: Start isEmpty. Operand 5010 states and 6376 transitions. [2018-09-10 12:19:48,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2018-09-10 12:19:48,889 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:19:48,889 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:19:48,889 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:19:48,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1724283094, now seen corresponding path program 1 times [2018-09-10 12:19:48,890 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:19:48,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:19:48,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:19:48,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:19:48,892 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:19:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:19:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 200 proven. 4 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-09-10 12:19:49,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:19:49,341 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:19:49,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:19:49,350 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:19:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:19:49,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:19:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 343 proven. 2 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2018-09-10 12:19:49,765 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:19:50,202 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 343 proven. 2 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2018-09-10 12:19:50,223 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:19:50,223 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 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:19:50,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:19:50,239 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:19:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:19:50,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:19:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 343 proven. 2 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2018-09-10 12:19:51,364 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:19:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 343 proven. 2 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2018-09-10 12:19:52,082 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:19:52,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 16 [2018-09-10 12:19:52,083 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:19:52,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-10 12:19:52,085 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-10 12:19:52,085 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2018-09-10 12:19:52,085 INFO L87 Difference]: Start difference. First operand 5010 states and 6376 transitions. Second operand 8 states. [2018-09-10 12:19:56,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:19:56,733 INFO L93 Difference]: Finished difference Result 10449 states and 13622 transitions. [2018-09-10 12:19:56,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:19:56,734 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 491 [2018-09-10 12:19:56,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:19:56,767 INFO L225 Difference]: With dead ends: 10449 [2018-09-10 12:19:56,767 INFO L226 Difference]: Without dead ends: 5445 [2018-09-10 12:19:56,796 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1978 GetRequests, 1957 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2018-09-10 12:19:56,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5445 states. [2018-09-10 12:19:56,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5445 to 5353. [2018-09-10 12:19:56,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5353 states. [2018-09-10 12:19:56,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5353 states to 5353 states and 6797 transitions. [2018-09-10 12:19:56,945 INFO L78 Accepts]: Start accepts. Automaton has 5353 states and 6797 transitions. Word has length 491 [2018-09-10 12:19:56,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:19:56,946 INFO L480 AbstractCegarLoop]: Abstraction has 5353 states and 6797 transitions. [2018-09-10 12:19:56,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-10 12:19:56,946 INFO L276 IsEmpty]: Start isEmpty. Operand 5353 states and 6797 transitions. [2018-09-10 12:19:56,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2018-09-10 12:19:56,966 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:19:56,966 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:19:56,967 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:19:56,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1231588144, now seen corresponding path program 1 times [2018-09-10 12:19:56,967 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:19:56,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:19:56,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:19:56,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:19:56,969 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:19:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:19:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 385 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-09-10 12:19:57,746 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:19:57,746 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:19:57,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:19:57,754 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:19:57,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:19:57,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:19:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 385 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-09-10 12:19:58,108 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:19:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 385 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-09-10 12:19:58,419 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:19:58,419 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:19:58,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:19:58,436 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:19:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:19:58,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:19:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 385 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-09-10 12:19:59,032 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:19:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 385 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-09-10 12:19:59,537 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:19:59,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-10 12:19:59,538 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:19:59,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:19:59,540 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:19:59,540 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:19:59,541 INFO L87 Difference]: Start difference. First operand 5353 states and 6797 transitions. Second operand 9 states. [2018-09-10 12:20:05,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:20:05,943 INFO L93 Difference]: Finished difference Result 11677 states and 15054 transitions. [2018-09-10 12:20:05,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 12:20:05,943 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 509 [2018-09-10 12:20:05,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:20:05,968 INFO L225 Difference]: With dead ends: 11677 [2018-09-10 12:20:05,968 INFO L226 Difference]: Without dead ends: 6330 [2018-09-10 12:20:05,988 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2052 GetRequests, 2032 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2018-09-10 12:20:05,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6330 states. [2018-09-10 12:20:06,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6330 to 6274. [2018-09-10 12:20:06,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6274 states. [2018-09-10 12:20:06,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6274 states to 6274 states and 7604 transitions. [2018-09-10 12:20:06,114 INFO L78 Accepts]: Start accepts. Automaton has 6274 states and 7604 transitions. Word has length 509 [2018-09-10 12:20:06,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:20:06,115 INFO L480 AbstractCegarLoop]: Abstraction has 6274 states and 7604 transitions. [2018-09-10 12:20:06,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:20:06,115 INFO L276 IsEmpty]: Start isEmpty. Operand 6274 states and 7604 transitions. [2018-09-10 12:20:06,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2018-09-10 12:20:06,126 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:20:06,127 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:20:06,127 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:20:06,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1454953849, now seen corresponding path program 1 times [2018-09-10 12:20:06,128 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:20:06,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:20:06,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:06,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:20:06,129 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:20:06,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:06,503 WARN L175 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:20:06,895 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 196 proven. 191 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-09-10 12:20:06,895 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:20:06,895 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:20:06,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:06,903 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:20:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:07,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:20:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-09-10 12:20:07,184 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:20:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-09-10 12:20:07,486 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 12:20:07,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-09-10 12:20:07,486 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:20:07,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:20:07,487 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:20:07,487 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-09-10 12:20:07,488 INFO L87 Difference]: Start difference. First operand 6274 states and 7604 transitions. Second operand 3 states. [2018-09-10 12:20:10,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:20:10,028 INFO L93 Difference]: Finished difference Result 12542 states and 15202 transitions. [2018-09-10 12:20:10,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:20:10,028 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 510 [2018-09-10 12:20:10,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:20:10,059 INFO L225 Difference]: With dead ends: 12542 [2018-09-10 12:20:10,060 INFO L226 Difference]: Without dead ends: 6274 [2018-09-10 12:20:10,068 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1031 GetRequests, 1020 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-09-10 12:20:10,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6274 states. [2018-09-10 12:20:10,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6274 to 6271. [2018-09-10 12:20:10,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6271 states. [2018-09-10 12:20:10,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6271 states to 6271 states and 7349 transitions. [2018-09-10 12:20:10,177 INFO L78 Accepts]: Start accepts. Automaton has 6271 states and 7349 transitions. Word has length 510 [2018-09-10 12:20:10,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:20:10,178 INFO L480 AbstractCegarLoop]: Abstraction has 6271 states and 7349 transitions. [2018-09-10 12:20:10,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:20:10,179 INFO L276 IsEmpty]: Start isEmpty. Operand 6271 states and 7349 transitions. [2018-09-10 12:20:10,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2018-09-10 12:20:10,199 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:20:10,200 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:20:10,200 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:20:10,201 INFO L82 PathProgramCache]: Analyzing trace with hash -554155492, now seen corresponding path program 1 times [2018-09-10 12:20:10,201 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:20:10,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:20:10,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:10,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:20:10,202 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:20:10,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 415 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-09-10 12:20:11,022 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:20:11,022 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:20:11,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:11,034 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:20:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:11,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:20:11,560 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 415 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-09-10 12:20:11,561 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:20:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 415 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-09-10 12:20:11,920 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:20:11,920 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:20:11,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:11,937 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:20:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:12,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:20:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 415 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-09-10 12:20:12,534 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:20:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 415 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-09-10 12:20:12,811 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:20:12,812 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-09-10 12:20:12,812 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:20:12,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:20:12,813 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:20:12,813 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:20:12,815 INFO L87 Difference]: Start difference. First operand 6271 states and 7349 transitions. Second operand 9 states. [2018-09-10 12:20:20,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:20:20,994 INFO L93 Difference]: Finished difference Result 20670 states and 25338 transitions. [2018-09-10 12:20:20,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-10 12:20:20,995 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 627 [2018-09-10 12:20:20,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:20:21,062 INFO L225 Difference]: With dead ends: 20670 [2018-09-10 12:20:21,062 INFO L226 Difference]: Without dead ends: 10512 [2018-09-10 12:20:21,106 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2531 GetRequests, 2507 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2018-09-10 12:20:21,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10512 states. [2018-09-10 12:20:21,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10512 to 10395. [2018-09-10 12:20:21,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10395 states. [2018-09-10 12:20:21,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10395 states to 10395 states and 11385 transitions. [2018-09-10 12:20:21,373 INFO L78 Accepts]: Start accepts. Automaton has 10395 states and 11385 transitions. Word has length 627 [2018-09-10 12:20:21,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:20:21,374 INFO L480 AbstractCegarLoop]: Abstraction has 10395 states and 11385 transitions. [2018-09-10 12:20:21,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:20:21,375 INFO L276 IsEmpty]: Start isEmpty. Operand 10395 states and 11385 transitions. [2018-09-10 12:20:21,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 882 [2018-09-10 12:20:21,401 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:20:21,402 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:20:21,402 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:20:21,402 INFO L82 PathProgramCache]: Analyzing trace with hash 197755356, now seen corresponding path program 1 times [2018-09-10 12:20:21,403 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:20:21,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:20:21,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:21,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:20:21,404 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:20:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 637 proven. 215 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2018-09-10 12:20:22,355 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:20:22,355 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:20:22,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:22,363 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:20:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:22,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:20:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 1140 proven. 2 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2018-09-10 12:20:23,305 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:20:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 637 proven. 215 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2018-09-10 12:20:23,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:20:23,787 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 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:20:23,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:23,804 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:20:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:24,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:20:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 1140 proven. 2 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2018-09-10 12:20:24,903 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:20:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 637 proven. 215 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2018-09-10 12:20:25,420 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:20:25,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-10 12:20:25,421 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:20:25,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:20:25,423 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:20:25,424 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:20:25,424 INFO L87 Difference]: Start difference. First operand 10395 states and 11385 transitions. Second operand 9 states. [2018-09-10 12:20:31,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:20:31,596 INFO L93 Difference]: Finished difference Result 25827 states and 30250 transitions. [2018-09-10 12:20:31,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-10 12:20:31,597 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 881 [2018-09-10 12:20:31,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:20:31,699 INFO L225 Difference]: With dead ends: 25827 [2018-09-10 12:20:31,699 INFO L226 Difference]: Without dead ends: 15443 [2018-09-10 12:20:31,759 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3546 GetRequests, 3523 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2018-09-10 12:20:31,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15443 states. [2018-09-10 12:20:32,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15443 to 15095. [2018-09-10 12:20:32,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15095 states. [2018-09-10 12:20:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15095 states to 15095 states and 17786 transitions. [2018-09-10 12:20:32,238 INFO L78 Accepts]: Start accepts. Automaton has 15095 states and 17786 transitions. Word has length 881 [2018-09-10 12:20:32,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:20:32,239 INFO L480 AbstractCegarLoop]: Abstraction has 15095 states and 17786 transitions. [2018-09-10 12:20:32,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:20:32,239 INFO L276 IsEmpty]: Start isEmpty. Operand 15095 states and 17786 transitions. [2018-09-10 12:20:32,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 901 [2018-09-10 12:20:32,291 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:20:32,292 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2018-09-10 12:20:32,292 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:20:32,293 INFO L82 PathProgramCache]: Analyzing trace with hash 643603724, now seen corresponding path program 1 times [2018-09-10 12:20:32,293 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:20:32,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:20:32,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:32,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:20:32,294 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:20:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:33,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1942 backedges. 908 proven. 2 refuted. 0 times theorem prover too weak. 1032 trivial. 0 not checked. [2018-09-10 12:20:33,463 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:20:33,464 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:20:33,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:33,480 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:20:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:33,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:20:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1942 backedges. 908 proven. 2 refuted. 0 times theorem prover too weak. 1032 trivial. 0 not checked. [2018-09-10 12:20:34,416 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:20:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1942 backedges. 908 proven. 2 refuted. 0 times theorem prover too weak. 1032 trivial. 0 not checked. [2018-09-10 12:20:34,850 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:20:34,850 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 15 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 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:20:34,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:34,865 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:20:35,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:35,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:20:35,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1942 backedges. 908 proven. 2 refuted. 0 times theorem prover too weak. 1032 trivial. 0 not checked. [2018-09-10 12:20:35,996 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:20:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1942 backedges. 908 proven. 2 refuted. 0 times theorem prover too weak. 1032 trivial. 0 not checked. [2018-09-10 12:20:36,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:20:36,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-10 12:20:36,425 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:20:36,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:20:36,426 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:20:36,426 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:20:36,426 INFO L87 Difference]: Start difference. First operand 15095 states and 17786 transitions. Second operand 9 states. [2018-09-10 12:20:41,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:20:41,783 INFO L93 Difference]: Finished difference Result 29329 states and 34356 transitions. [2018-09-10 12:20:41,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-10 12:20:41,784 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 900 [2018-09-10 12:20:41,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:20:41,837 INFO L225 Difference]: With dead ends: 29329 [2018-09-10 12:20:41,837 INFO L226 Difference]: Without dead ends: 13188 [2018-09-10 12:20:41,932 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3626 GetRequests, 3600 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2018-09-10 12:20:41,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13188 states. [2018-09-10 12:20:42,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13188 to 12357. [2018-09-10 12:20:42,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12357 states. [2018-09-10 12:20:42,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12357 states to 12357 states and 13309 transitions. [2018-09-10 12:20:42,177 INFO L78 Accepts]: Start accepts. Automaton has 12357 states and 13309 transitions. Word has length 900 [2018-09-10 12:20:42,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:20:42,178 INFO L480 AbstractCegarLoop]: Abstraction has 12357 states and 13309 transitions. [2018-09-10 12:20:42,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:20:42,179 INFO L276 IsEmpty]: Start isEmpty. Operand 12357 states and 13309 transitions. [2018-09-10 12:20:42,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1012 [2018-09-10 12:20:42,219 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:20:42,220 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:20:42,221 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:20:42,221 INFO L82 PathProgramCache]: Analyzing trace with hash -52018473, now seen corresponding path program 1 times [2018-09-10 12:20:42,221 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:20:42,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:20:42,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:42,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:20:42,223 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:20:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:43,161 WARN L175 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-10 12:20:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2128 backedges. 832 proven. 110 refuted. 0 times theorem prover too weak. 1186 trivial. 0 not checked. [2018-09-10 12:20:43,867 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:20:43,867 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:20:43,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:43,874 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:20:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:44,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:20:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2128 backedges. 749 proven. 0 refuted. 0 times theorem prover too weak. 1379 trivial. 0 not checked. [2018-09-10 12:20:45,106 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:20:47,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2128 backedges. 396 proven. 663 refuted. 0 times theorem prover too weak. 1069 trivial. 0 not checked. [2018-09-10 12:20:47,219 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:20:47,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-09-10 12:20:47,220 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:20:47,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:20:47,221 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:20:47,221 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-09-10 12:20:47,221 INFO L87 Difference]: Start difference. First operand 12357 states and 13309 transitions. Second operand 6 states. [2018-09-10 12:20:51,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:20:51,296 INFO L93 Difference]: Finished difference Result 25816 states and 27805 transitions. [2018-09-10 12:20:51,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-10 12:20:51,296 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1011 [2018-09-10 12:20:51,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:20:51,330 INFO L225 Difference]: With dead ends: 25816 [2018-09-10 12:20:51,330 INFO L226 Difference]: Without dead ends: 13470 [2018-09-10 12:20:51,355 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2040 GetRequests, 2017 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2018-09-10 12:20:51,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13470 states. [2018-09-10 12:20:51,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13470 to 12985. [2018-09-10 12:20:51,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12985 states. [2018-09-10 12:20:51,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12985 states to 12985 states and 13960 transitions. [2018-09-10 12:20:51,586 INFO L78 Accepts]: Start accepts. Automaton has 12985 states and 13960 transitions. Word has length 1011 [2018-09-10 12:20:51,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:20:51,587 INFO L480 AbstractCegarLoop]: Abstraction has 12985 states and 13960 transitions. [2018-09-10 12:20:51,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:20:51,587 INFO L276 IsEmpty]: Start isEmpty. Operand 12985 states and 13960 transitions. [2018-09-10 12:20:51,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1252 [2018-09-10 12:20:51,621 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:20:51,622 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:20:51,623 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:20:51,623 INFO L82 PathProgramCache]: Analyzing trace with hash -452124612, now seen corresponding path program 1 times [2018-09-10 12:20:51,623 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:20:51,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:20:51,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:51,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:20:51,624 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:20:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:55,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3122 backedges. 505 proven. 1548 refuted. 0 times theorem prover too weak. 1069 trivial. 0 not checked. [2018-09-10 12:20:55,110 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:20:55,110 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:20:55,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:55,119 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:20:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:55,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:20:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3122 backedges. 1504 proven. 2 refuted. 0 times theorem prover too weak. 1616 trivial. 0 not checked. [2018-09-10 12:20:56,486 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:20:59,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3122 backedges. 490 proven. 1326 refuted. 0 times theorem prover too weak. 1306 trivial. 0 not checked. [2018-09-10 12:20:59,295 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:20:59,296 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 18 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 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:20:59,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:59,313 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:21:00,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:00,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:21:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3122 backedges. 1741 proven. 2 refuted. 0 times theorem prover too weak. 1379 trivial. 0 not checked. [2018-09-10 12:21:01,175 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:21:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3122 backedges. 725 proven. 675 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2018-09-10 12:21:04,168 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:21:04,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 8, 5] total 24 [2018-09-10 12:21:04,169 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:21:04,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-10 12:21:04,173 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-10 12:21:04,173 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2018-09-10 12:21:04,173 INFO L87 Difference]: Start difference. First operand 12985 states and 13960 transitions. Second operand 16 states. [2018-09-10 12:21:16,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:21:16,471 INFO L93 Difference]: Finished difference Result 39231 states and 42519 transitions. [2018-09-10 12:21:16,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-10 12:21:16,471 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 1251 [2018-09-10 12:21:16,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:21:16,539 INFO L225 Difference]: With dead ends: 39231 [2018-09-10 12:21:16,539 INFO L226 Difference]: Without dead ends: 26590 [2018-09-10 12:21:16,575 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5086 GetRequests, 5019 SyntacticMatches, 12 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=651, Invalid=2541, Unknown=0, NotChecked=0, Total=3192 [2018-09-10 12:21:16,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26590 states. [2018-09-10 12:21:16,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26590 to 24375. [2018-09-10 12:21:16,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24375 states. [2018-09-10 12:21:17,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24375 states to 24375 states and 26220 transitions. [2018-09-10 12:21:17,015 INFO L78 Accepts]: Start accepts. Automaton has 24375 states and 26220 transitions. Word has length 1251 [2018-09-10 12:21:17,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:21:17,016 INFO L480 AbstractCegarLoop]: Abstraction has 24375 states and 26220 transitions. [2018-09-10 12:21:17,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-10 12:21:17,016 INFO L276 IsEmpty]: Start isEmpty. Operand 24375 states and 26220 transitions. [2018-09-10 12:21:17,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1261 [2018-09-10 12:21:17,064 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:21:17,065 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:21:17,066 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:21:17,066 INFO L82 PathProgramCache]: Analyzing trace with hash 984688235, now seen corresponding path program 1 times [2018-09-10 12:21:17,068 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:21:17,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:17,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:17,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:17,069 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:21:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 872 proven. 392 refuted. 0 times theorem prover too weak. 1872 trivial. 0 not checked. [2018-09-10 12:21:18,749 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:21:18,749 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:21:18,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:18,768 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:21:19,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:19,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:21:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 2184 proven. 2 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-09-10 12:21:19,793 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:21:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 872 proven. 392 refuted. 0 times theorem prover too weak. 1872 trivial. 0 not checked. [2018-09-10 12:21:20,483 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:21:20,483 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 20 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 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:21:20,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:20,501 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:21:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:21,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:21:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 2184 proven. 2 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-09-10 12:21:21,961 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:21:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 872 proven. 392 refuted. 0 times theorem prover too weak. 1872 trivial. 0 not checked. [2018-09-10 12:21:22,808 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:21:22,809 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-10 12:21:22,809 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:21:22,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:21:22,813 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:21:22,813 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:21:22,814 INFO L87 Difference]: Start difference. First operand 24375 states and 26220 transitions. Second operand 9 states. [2018-09-10 12:21:28,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:21:28,154 INFO L93 Difference]: Finished difference Result 48289 states and 51863 transitions. [2018-09-10 12:21:28,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-10 12:21:28,155 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1260 [2018-09-10 12:21:28,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:21:28,214 INFO L225 Difference]: With dead ends: 48289 [2018-09-10 12:21:28,214 INFO L226 Difference]: Without dead ends: 24260 [2018-09-10 12:21:28,262 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5062 GetRequests, 5039 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2018-09-10 12:21:28,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24260 states. [2018-09-10 12:21:28,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24260 to 20611. [2018-09-10 12:21:28,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20611 states. [2018-09-10 12:21:28,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20611 states to 20611 states and 21378 transitions. [2018-09-10 12:21:28,595 INFO L78 Accepts]: Start accepts. Automaton has 20611 states and 21378 transitions. Word has length 1260 [2018-09-10 12:21:28,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:21:28,596 INFO L480 AbstractCegarLoop]: Abstraction has 20611 states and 21378 transitions. [2018-09-10 12:21:28,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:21:28,596 INFO L276 IsEmpty]: Start isEmpty. Operand 20611 states and 21378 transitions. [2018-09-10 12:21:28,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1261 [2018-09-10 12:21:28,618 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:21:28,618 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:21:28,619 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:21:28,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1395646199, now seen corresponding path program 1 times [2018-09-10 12:21:28,619 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:21:28,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:28,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:28,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:28,620 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:21:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:29,429 WARN L175 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-09-10 12:21:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 1043 proven. 218 refuted. 0 times theorem prover too weak. 1256 trivial. 0 not checked. [2018-09-10 12:21:33,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:21:33,251 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:21:33,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:33,258 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:21:33,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:33,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:21:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 1699 proven. 6 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2018-09-10 12:21:34,704 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:21:34,909 WARN L175 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2018-09-10 12:21:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 346 proven. 1545 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2018-09-10 12:21:38,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:21:38,526 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 22 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 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:21:38,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:38,545 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:21:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:39,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:21:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 1458 proven. 6 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2018-09-10 12:21:41,042 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:21:47,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 348 proven. 1543 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2018-09-10 12:21:47,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:21:47,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8, 7, 8] total 33 [2018-09-10 12:21:47,796 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:21:47,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-10 12:21:47,798 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-10 12:21:47,798 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2018-09-10 12:21:47,799 INFO L87 Difference]: Start difference. First operand 20611 states and 21378 transitions. Second operand 18 states. [2018-09-10 12:21:53,652 WARN L175 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2018-09-10 12:21:53,911 WARN L175 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2018-09-10 12:21:54,372 WARN L175 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2018-09-10 12:21:59,000 WARN L175 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2018-09-10 12:21:59,704 WARN L175 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2018-09-10 12:22:02,368 WARN L175 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2018-09-10 12:22:02,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:22:02,632 INFO L93 Difference]: Finished difference Result 42523 states and 44126 transitions. [2018-09-10 12:22:02,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-10 12:22:02,632 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1260 [2018-09-10 12:22:02,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:22:02,671 INFO L225 Difference]: With dead ends: 42523 [2018-09-10 12:22:02,671 INFO L226 Difference]: Without dead ends: 22258 [2018-09-10 12:22:02,701 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5115 GetRequests, 5046 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=830, Invalid=3726, Unknown=0, NotChecked=0, Total=4556 [2018-09-10 12:22:02,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22258 states. [2018-09-10 12:22:02,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22258 to 19937. [2018-09-10 12:22:02,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19937 states. [2018-09-10 12:22:03,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19937 states to 19937 states and 20669 transitions. [2018-09-10 12:22:03,002 INFO L78 Accepts]: Start accepts. Automaton has 19937 states and 20669 transitions. Word has length 1260 [2018-09-10 12:22:03,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:22:03,002 INFO L480 AbstractCegarLoop]: Abstraction has 19937 states and 20669 transitions. [2018-09-10 12:22:03,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-10 12:22:03,003 INFO L276 IsEmpty]: Start isEmpty. Operand 19937 states and 20669 transitions. [2018-09-10 12:22:03,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1415 [2018-09-10 12:22:03,030 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:22:03,031 INFO L376 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:22:03,032 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:22:03,032 INFO L82 PathProgramCache]: Analyzing trace with hash -788490474, now seen corresponding path program 1 times [2018-09-10 12:22:03,032 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:22:03,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:22:03,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:22:03,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:22:03,034 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:22:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:22:04,236 WARN L175 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-10 12:22:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4316 backedges. 1170 proven. 182 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2018-09-10 12:22:05,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:22:05,892 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:22:05,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:22:05,900 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:22:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:22:06,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:22:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4316 backedges. 2888 proven. 6 refuted. 0 times theorem prover too weak. 1422 trivial. 0 not checked. [2018-09-10 12:22:07,309 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:22:07,478 WARN L175 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-09-10 12:22:08,680 WARN L175 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-10 12:22:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4316 backedges. 1784 proven. 361 refuted. 0 times theorem prover too weak. 2171 trivial. 0 not checked. [2018-09-10 12:22:11,552 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:22:11,552 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 24 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 24 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:22:11,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:22:11,569 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:22:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:22:12,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:22:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4316 backedges. 1632 proven. 872 refuted. 0 times theorem prover too weak. 1812 trivial. 0 not checked. [2018-09-10 12:22:13,648 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:22:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4316 backedges. 1636 proven. 2 refuted. 0 times theorem prover too weak. 2678 trivial. 0 not checked. [2018-09-10 12:22:18,167 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:22:18,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8, 7, 5] total 28 [2018-09-10 12:22:18,169 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:22:18,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-10 12:22:18,172 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-10 12:22:18,172 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2018-09-10 12:22:18,172 INFO L87 Difference]: Start difference. First operand 19937 states and 20669 transitions. Second operand 16 states. [2018-09-10 12:22:44,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:22:44,660 INFO L93 Difference]: Finished difference Result 44762 states and 46371 transitions. [2018-09-10 12:22:44,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-10 12:22:44,660 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 1414 [2018-09-10 12:22:44,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:22:44,662 INFO L225 Difference]: With dead ends: 44762 [2018-09-10 12:22:44,662 INFO L226 Difference]: Without dead ends: 0 [2018-09-10 12:22:44,698 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5722 GetRequests, 5667 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=536, Invalid=2434, Unknown=0, NotChecked=0, Total=2970 [2018-09-10 12:22:44,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-09-10 12:22:44,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-09-10 12:22:44,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-09-10 12:22:44,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-09-10 12:22:44,699 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1414 [2018-09-10 12:22:44,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:22:44,699 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-09-10 12:22:44,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-10 12:22:44,700 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-09-10 12:22:44,700 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-09-10 12:22:44,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-09-10 12:22:44,781 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:44,789 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:44,809 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:44,810 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:44,811 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:44,812 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:44,812 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:45,012 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:45,182 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:45,220 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:45,323 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:45,324 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:45,361 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:45,362 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:45,397 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:45,452 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:45,528 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:45,552 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:45,595 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:45,616 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:45,628 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:45,635 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:45,642 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:45,765 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:45,768 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:45,816 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:45,826 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:45,828 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:45,869 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:46,036 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:46,037 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:46,115 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:46,117 WARN L175 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 665 DAG size of output: 527 [2018-09-10 12:22:46,141 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:46,148 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:46,150 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:46,175 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:46,333 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:46,356 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,136 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,141 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,161 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,162 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,163 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,164 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,165 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,351 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,486 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,515 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,596 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,597 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,629 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,630 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,659 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,702 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,766 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,789 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,823 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,842 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,853 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,859 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,865 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,992 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:47,994 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:48,040 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:48,049 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:48,050 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:48,089 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:48,243 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:48,244 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:48,305 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:48,307 WARN L175 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 665 DAG size of output: 527 [2018-09-10 12:22:48,312 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:48,333 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:48,377 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:48,522 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:48,526 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:48,530 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:48,621 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:48,624 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:48,628 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:48,654 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:48,657 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:48,667 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:48,670 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:48,694 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:48,743 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:22:49,060 WARN L175 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 15 [2018-09-10 12:22:52,993 WARN L175 SmtUtils]: Spent 3.93 s on a formula simplification. DAG size of input: 485 DAG size of output: 72 Received shutdown request... [2018-09-10 12:22:57,503 WARN L183 SmtUtils]: Removed 18 from assertion stack [2018-09-10 12:22:57,503 INFO L256 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2018-09-10 12:22:57,504 INFO L168 Benchmark]: Toolchain (without parser) took 228747.41 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 3.3 GB in the end (delta: -1.9 GB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-09-10 12:22:57,506 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-10 12:22:57,506 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1214.35 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-09-10 12:22:57,507 INFO L168 Benchmark]: Boogie Procedure Inliner took 208.23 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. [2018-09-10 12:22:57,512 INFO L168 Benchmark]: Boogie Preprocessor took 422.38 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 834.1 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -974.4 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. [2018-09-10 12:22:57,513 INFO L168 Benchmark]: RCFGBuilder took 6330.08 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 297.1 MB). Peak memory consumption was 297.1 MB. Max. memory is 7.1 GB. [2018-09-10 12:22:57,513 INFO L168 Benchmark]: TraceAbstraction took 220564.60 ms. Allocated memory was 2.4 GB in the beginning and 4.2 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 3.3 GB in the end (delta: -1.4 GB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-09-10 12:22:57,518 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1214.35 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 208.23 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 422.38 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 834.1 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -974.4 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 6330.08 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 297.1 MB). Peak memory consumption was 297.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 220564.60 ms. Allocated memory was 2.4 GB in the beginning and 4.2 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 3.3 GB in the end (delta: -1.4 GB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 205]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - TimeoutResult: Timeout (de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction) Toolchain cancelled while SimplifyDDAWithTimeout was simplifying term of DAG size 461. RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem16_label28_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_12-22-57-529.csv Completed graceful shutdown