java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label53_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:54:58,798 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:54:58,800 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:54:58,812 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:54:58,812 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:54:58,813 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:54:58,814 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:54:58,816 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:54:58,818 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:54:58,819 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:54:58,820 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:54:58,820 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:54:58,821 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:54:58,822 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:54:58,823 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:54:58,824 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:54:58,825 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:54:58,827 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:54:58,829 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:54:58,830 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:54:58,831 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:54:58,833 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:54:58,835 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:54:58,835 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:54:58,836 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:54:58,837 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:54:58,838 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:54:58,839 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:54:58,839 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:54:58,841 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:54:58,841 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:54:58,842 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 12:54:58,842 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:54:58,842 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:54:58,843 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:54:58,844 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:54:58,844 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-07-24 12:54:58,865 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:54:58,865 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:54:58,866 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:54:58,866 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:54:58,866 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:54:58,866 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:54:58,867 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:54:58,867 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:54:58,867 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:54:58,867 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:54:58,867 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:54:58,868 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:54:58,868 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:54:58,869 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:54:58,869 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:54:58,869 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:54:58,869 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:54:58,869 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:54:58,870 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:54:58,870 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:54:58,870 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:54:58,870 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:54:58,870 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:54:58,871 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:54:58,871 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:54:58,871 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:54:58,871 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:54:58,872 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:54:58,872 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:54:58,872 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:54:58,872 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:54:58,872 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:54:58,873 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:54:58,940 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:54:58,959 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:54:58,967 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:54:58,969 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:54:58,970 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:54:58,971 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label53_true-unreach-call.c [2018-07-24 12:54:59,326 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b3bf984a/9cffe70ef4f54d25b097f1b006c75f6c/FLAG1cefa1107 [2018-07-24 12:54:59,695 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:54:59,696 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label53_true-unreach-call.c [2018-07-24 12:54:59,724 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b3bf984a/9cffe70ef4f54d25b097f1b006c75f6c/FLAG1cefa1107 [2018-07-24 12:54:59,747 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b3bf984a/9cffe70ef4f54d25b097f1b006c75f6c [2018-07-24 12:54:59,759 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:54:59,760 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:54:59,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:54:59,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:54:59,769 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:54:59,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:54:59" (1/1) ... [2018-07-24 12:54:59,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58dc2a6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:54:59, skipping insertion in model container [2018-07-24 12:54:59,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:54:59" (1/1) ... [2018-07-24 12:55:00,023 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:55:00,534 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:55:00,555 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:55:00,889 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:55:00,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:55:00 WrapperNode [2018-07-24 12:55:00,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:55:00,965 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:55:00,966 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:55:00,966 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:55:00,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:55:00" (1/1) ... [2018-07-24 12:55:01,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:55:00" (1/1) ... [2018-07-24 12:55:01,123 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:55:01,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:55:01,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:55:01,124 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:55:01,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:55:00" (1/1) ... [2018-07-24 12:55:01,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:55:00" (1/1) ... [2018-07-24 12:55:01,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:55:00" (1/1) ... [2018-07-24 12:55:01,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:55:00" (1/1) ... [2018-07-24 12:55:01,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:55:00" (1/1) ... [2018-07-24 12:55:01,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:55:00" (1/1) ... [2018-07-24 12:55:01,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:55:00" (1/1) ... [2018-07-24 12:55:01,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:55:01,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:55:01,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:55:01,529 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:55:01,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:55:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:55:01,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:55:01,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:55:01,612 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 [2018-07-24 12:55:01,613 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 [2018-07-24 12:55:01,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:55:01,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:55:01,613 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:55:01,613 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:55:06,360 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:55:06,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:55:06 BoogieIcfgContainer [2018-07-24 12:55:06,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:55:06,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:55:06,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:55:06,365 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:55:06,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:54:59" (1/3) ... [2018-07-24 12:55:06,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13010019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:55:06, skipping insertion in model container [2018-07-24 12:55:06,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:55:00" (2/3) ... [2018-07-24 12:55:06,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13010019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:55:06, skipping insertion in model container [2018-07-24 12:55:06,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:55:06" (3/3) ... [2018-07-24 12:55:06,369 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label53_true-unreach-call.c [2018-07-24 12:55:06,377 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:55:06,385 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:55:06,442 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:55:06,443 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:55:06,443 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:55:06,443 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:55:06,444 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:55:06,444 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:55:06,444 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:55:06,444 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:55:06,444 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:55:06,476 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-07-24 12:55:06,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-07-24 12:55:06,499 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:55:06,500 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:55:06,501 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:55:06,506 INFO L82 PathProgramCache]: Analyzing trace with hash 390618596, now seen corresponding path program 1 times [2018-07-24 12:55:06,509 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:55:06,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:06,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:06,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:06,558 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:55:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:07,448 WARN L169 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:55:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:55:07,704 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:55:07,704 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:55:07,705 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:55:07,712 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:55:07,728 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:55:07,729 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:55:07,734 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-07-24 12:55:09,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:55:09,618 INFO L93 Difference]: Finished difference Result 848 states and 1491 transitions. [2018-07-24 12:55:09,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:55:09,620 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 201 [2018-07-24 12:55:09,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:55:09,645 INFO L225 Difference]: With dead ends: 848 [2018-07-24 12:55:09,645 INFO L226 Difference]: Without dead ends: 534 [2018-07-24 12:55:09,653 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:55:09,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2018-07-24 12:55:09,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 532. [2018-07-24 12:55:09,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2018-07-24 12:55:09,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 867 transitions. [2018-07-24 12:55:09,739 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 867 transitions. Word has length 201 [2018-07-24 12:55:09,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:55:09,740 INFO L471 AbstractCegarLoop]: Abstraction has 532 states and 867 transitions. [2018-07-24 12:55:09,741 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:55:09,741 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 867 transitions. [2018-07-24 12:55:09,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-07-24 12:55:09,751 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:55:09,751 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:55:09,751 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:55:09,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1229236448, now seen corresponding path program 1 times [2018-07-24 12:55:09,752 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:55:09,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:09,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:09,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:09,754 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:55:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:55:10,401 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:55:10,401 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:55:10,401 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:55:10,405 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:55:10,405 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:55:10,405 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:55:10,406 INFO L87 Difference]: Start difference. First operand 532 states and 867 transitions. Second operand 3 states. [2018-07-24 12:55:12,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:55:12,786 INFO L93 Difference]: Finished difference Result 1484 states and 2494 transitions. [2018-07-24 12:55:12,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:55:12,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 214 [2018-07-24 12:55:12,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:55:12,797 INFO L225 Difference]: With dead ends: 1484 [2018-07-24 12:55:12,797 INFO L226 Difference]: Without dead ends: 958 [2018-07-24 12:55:12,803 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:55:12,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2018-07-24 12:55:12,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 952. [2018-07-24 12:55:12,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 952 states. [2018-07-24 12:55:12,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1499 transitions. [2018-07-24 12:55:12,851 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1499 transitions. Word has length 214 [2018-07-24 12:55:12,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:55:12,852 INFO L471 AbstractCegarLoop]: Abstraction has 952 states and 1499 transitions. [2018-07-24 12:55:12,852 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:55:12,852 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1499 transitions. [2018-07-24 12:55:12,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-07-24 12:55:12,860 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:55:12,861 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:55:12,861 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:55:12,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1927078695, now seen corresponding path program 1 times [2018-07-24 12:55:12,861 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:55:12,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:12,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:12,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:12,863 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:55:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:13,102 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:55:13,103 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:55:13,103 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:55:13,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:13,123 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:55:13,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:13,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:55:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:55:13,817 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:55:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:55:14,244 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:55:14,244 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:55:14,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:14,261 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:55:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:14,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:55:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:55:15,013 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:55:15,267 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 12:55:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:55:15,482 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:55:15,482 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 14 [2018-07-24 12:55:15,483 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:55:15,484 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-24 12:55:15,484 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-24 12:55:15,486 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:55:15,491 INFO L87 Difference]: Start difference. First operand 952 states and 1499 transitions. Second operand 8 states. [2018-07-24 12:55:22,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:55:22,214 INFO L93 Difference]: Finished difference Result 3678 states and 6274 transitions. [2018-07-24 12:55:22,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:55:22,220 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 225 [2018-07-24 12:55:22,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:55:22,254 INFO L225 Difference]: With dead ends: 3678 [2018-07-24 12:55:22,254 INFO L226 Difference]: Without dead ends: 2732 [2018-07-24 12:55:22,265 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 912 GetRequests, 893 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2018-07-24 12:55:22,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2018-07-24 12:55:22,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 2664. [2018-07-24 12:55:22,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2664 states. [2018-07-24 12:55:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 3877 transitions. [2018-07-24 12:55:22,424 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 3877 transitions. Word has length 225 [2018-07-24 12:55:22,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:55:22,425 INFO L471 AbstractCegarLoop]: Abstraction has 2664 states and 3877 transitions. [2018-07-24 12:55:22,425 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-24 12:55:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 3877 transitions. [2018-07-24 12:55:22,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-07-24 12:55:22,441 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:55:22,442 INFO L353 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:55:22,442 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:55:22,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1394729075, now seen corresponding path program 1 times [2018-07-24 12:55:22,442 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:55:22,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:22,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:22,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:22,444 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:55:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:22,767 WARN L169 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:55:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:55:22,947 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:55:22,947 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:55:22,947 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:55:22,948 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:55:22,948 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:55:22,948 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:55:22,949 INFO L87 Difference]: Start difference. First operand 2664 states and 3877 transitions. Second operand 6 states. [2018-07-24 12:55:26,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:55:26,115 INFO L93 Difference]: Finished difference Result 8429 states and 13168 transitions. [2018-07-24 12:55:26,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:55:26,119 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 236 [2018-07-24 12:55:26,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:55:26,160 INFO L225 Difference]: With dead ends: 8429 [2018-07-24 12:55:26,161 INFO L226 Difference]: Without dead ends: 5771 [2018-07-24 12:55:26,184 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:55:26,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5771 states. [2018-07-24 12:55:26,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5771 to 5698. [2018-07-24 12:55:26,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5698 states. [2018-07-24 12:55:26,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5698 states to 5698 states and 8101 transitions. [2018-07-24 12:55:26,368 INFO L78 Accepts]: Start accepts. Automaton has 5698 states and 8101 transitions. Word has length 236 [2018-07-24 12:55:26,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:55:26,368 INFO L471 AbstractCegarLoop]: Abstraction has 5698 states and 8101 transitions. [2018-07-24 12:55:26,368 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:55:26,369 INFO L276 IsEmpty]: Start isEmpty. Operand 5698 states and 8101 transitions. [2018-07-24 12:55:26,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-07-24 12:55:26,392 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:55:26,392 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:55:26,393 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:55:26,393 INFO L82 PathProgramCache]: Analyzing trace with hash 19976442, now seen corresponding path program 1 times [2018-07-24 12:55:26,393 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:55:26,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:26,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:26,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:26,395 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:55:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:55:26,677 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:55:26,678 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:55:26,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:26,757 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:55:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:26,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:55:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:55:27,179 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:55:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:55:27,639 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:55:27,640 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-07-24 12:55:27,640 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:55:27,640 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:55:27,641 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:55:27,641 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:55:27,641 INFO L87 Difference]: Start difference. First operand 5698 states and 8101 transitions. Second operand 3 states. [2018-07-24 12:55:29,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:55:29,119 INFO L93 Difference]: Finished difference Result 11393 states and 16205 transitions. [2018-07-24 12:55:29,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:55:29,121 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 239 [2018-07-24 12:55:29,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:55:29,147 INFO L225 Difference]: With dead ends: 11393 [2018-07-24 12:55:29,148 INFO L226 Difference]: Without dead ends: 5701 [2018-07-24 12:55:29,170 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 476 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:55:29,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5701 states. [2018-07-24 12:55:29,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5701 to 5656. [2018-07-24 12:55:29,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5656 states. [2018-07-24 12:55:29,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5656 states to 5656 states and 7607 transitions. [2018-07-24 12:55:29,314 INFO L78 Accepts]: Start accepts. Automaton has 5656 states and 7607 transitions. Word has length 239 [2018-07-24 12:55:29,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:55:29,315 INFO L471 AbstractCegarLoop]: Abstraction has 5656 states and 7607 transitions. [2018-07-24 12:55:29,315 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:55:29,315 INFO L276 IsEmpty]: Start isEmpty. Operand 5656 states and 7607 transitions. [2018-07-24 12:55:29,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-07-24 12:55:29,334 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:55:29,334 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:55:29,335 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:55:29,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1808021271, now seen corresponding path program 1 times [2018-07-24 12:55:29,335 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:55:29,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:29,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:29,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:29,337 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:55:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 71 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-07-24 12:55:29,840 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:55:29,840 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:55:29,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:29,860 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:55:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:30,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:55:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:55:30,534 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:55:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:55:31,380 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:55:31,380 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:55:31,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:31,399 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:55:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:31,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:55:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:55:32,558 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:55:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:55:32,703 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:55:32,703 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-07-24 12:55:32,704 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:55:32,704 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:55:32,704 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:55:32,705 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:55:32,705 INFO L87 Difference]: Start difference. First operand 5656 states and 7607 transitions. Second operand 9 states. [2018-07-24 12:55:37,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:55:37,383 INFO L93 Difference]: Finished difference Result 17498 states and 26702 transitions. [2018-07-24 12:55:37,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:55:37,384 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 267 [2018-07-24 12:55:37,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:55:37,481 INFO L225 Difference]: With dead ends: 17498 [2018-07-24 12:55:37,482 INFO L226 Difference]: Without dead ends: 11848 [2018-07-24 12:55:37,518 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1086 GetRequests, 1063 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2018-07-24 12:55:37,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11848 states. [2018-07-24 12:55:37,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11848 to 10655. [2018-07-24 12:55:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10655 states. [2018-07-24 12:55:37,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10655 states to 10655 states and 13969 transitions. [2018-07-24 12:55:37,931 INFO L78 Accepts]: Start accepts. Automaton has 10655 states and 13969 transitions. Word has length 267 [2018-07-24 12:55:37,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:55:37,932 INFO L471 AbstractCegarLoop]: Abstraction has 10655 states and 13969 transitions. [2018-07-24 12:55:37,932 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:55:37,932 INFO L276 IsEmpty]: Start isEmpty. Operand 10655 states and 13969 transitions. [2018-07-24 12:55:37,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-07-24 12:55:37,959 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:55:37,960 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:55:37,960 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:55:37,960 INFO L82 PathProgramCache]: Analyzing trace with hash 646437938, now seen corresponding path program 1 times [2018-07-24 12:55:37,960 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:55:37,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:37,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:37,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:37,962 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:55:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:38,878 WARN L169 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 11 [2018-07-24 12:55:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:55:39,229 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:55:39,229 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:55:39,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:39,340 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:55:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:39,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:55:39,957 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:55:39,957 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:55:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:55:40,389 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:55:40,389 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [8] total 14 [2018-07-24 12:55:40,389 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:55:40,390 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:55:40,390 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:55:40,390 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:55:40,391 INFO L87 Difference]: Start difference. First operand 10655 states and 13969 transitions. Second operand 5 states. [2018-07-24 12:55:43,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:55:43,051 INFO L93 Difference]: Finished difference Result 27490 states and 35969 transitions. [2018-07-24 12:55:43,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:55:43,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 280 [2018-07-24 12:55:43,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:55:43,127 INFO L225 Difference]: With dead ends: 27490 [2018-07-24 12:55:43,127 INFO L226 Difference]: Without dead ends: 16841 [2018-07-24 12:55:43,150 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 556 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:55:43,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16841 states. [2018-07-24 12:55:43,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16841 to 16683. [2018-07-24 12:55:43,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16683 states. [2018-07-24 12:55:43,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16683 states to 16683 states and 21340 transitions. [2018-07-24 12:55:43,595 INFO L78 Accepts]: Start accepts. Automaton has 16683 states and 21340 transitions. Word has length 280 [2018-07-24 12:55:43,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:55:43,595 INFO L471 AbstractCegarLoop]: Abstraction has 16683 states and 21340 transitions. [2018-07-24 12:55:43,595 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:55:43,595 INFO L276 IsEmpty]: Start isEmpty. Operand 16683 states and 21340 transitions. [2018-07-24 12:55:43,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-07-24 12:55:43,641 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:55:43,641 INFO L353 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:55:43,641 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:55:43,642 INFO L82 PathProgramCache]: Analyzing trace with hash 684440725, now seen corresponding path program 1 times [2018-07-24 12:55:43,642 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:55:43,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:43,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:43,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:43,643 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:55:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 124 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:55:44,193 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:55:44,193 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:55:44,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:44,209 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:55:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:44,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:55:45,126 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-07-24 12:55:45,126 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:55:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 98 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:55:45,427 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:55:45,427 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2018-07-24 12:55:45,428 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:55:45,428 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:55:45,428 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:55:45,429 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:55:45,429 INFO L87 Difference]: Start difference. First operand 16683 states and 21340 transitions. Second operand 6 states. [2018-07-24 12:55:47,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:55:47,908 INFO L93 Difference]: Finished difference Result 33919 states and 44773 transitions. [2018-07-24 12:55:47,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:55:47,909 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 307 [2018-07-24 12:55:47,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:55:47,980 INFO L225 Difference]: With dead ends: 33919 [2018-07-24 12:55:47,980 INFO L226 Difference]: Without dead ends: 17241 [2018-07-24 12:55:48,020 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 606 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2018-07-24 12:55:48,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17241 states. [2018-07-24 12:55:48,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17241 to 16820. [2018-07-24 12:55:48,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16820 states. [2018-07-24 12:55:48,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16820 states to 16820 states and 21415 transitions. [2018-07-24 12:55:48,497 INFO L78 Accepts]: Start accepts. Automaton has 16820 states and 21415 transitions. Word has length 307 [2018-07-24 12:55:48,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:55:48,497 INFO L471 AbstractCegarLoop]: Abstraction has 16820 states and 21415 transitions. [2018-07-24 12:55:48,498 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:55:48,498 INFO L276 IsEmpty]: Start isEmpty. Operand 16820 states and 21415 transitions. [2018-07-24 12:55:48,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2018-07-24 12:55:48,541 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:55:48,542 INFO L353 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:55:48,542 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:55:48,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1345899106, now seen corresponding path program 1 times [2018-07-24 12:55:48,543 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:55:48,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:48,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:48,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:48,544 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:55:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:48,854 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 4 [2018-07-24 12:55:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 102 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:55:49,372 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:55:49,373 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:55:49,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:49,390 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:55:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:49,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:55:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-07-24 12:55:50,182 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:55:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 102 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:55:50,611 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:55:50,612 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 12:55:50,612 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:55:50,612 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:55:50,613 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:55:50,613 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:55:50,613 INFO L87 Difference]: Start difference. First operand 16820 states and 21415 transitions. Second operand 5 states. [2018-07-24 12:55:53,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:55:53,199 INFO L93 Difference]: Finished difference Result 46856 states and 60856 transitions. [2018-07-24 12:55:53,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:55:53,199 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 309 [2018-07-24 12:55:53,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:55:53,310 INFO L225 Difference]: With dead ends: 46856 [2018-07-24 12:55:53,310 INFO L226 Difference]: Without dead ends: 30042 [2018-07-24 12:55:53,353 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 613 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:55:53,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30042 states. [2018-07-24 12:55:53,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30042 to 28363. [2018-07-24 12:55:53,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28363 states. [2018-07-24 12:55:53,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28363 states to 28363 states and 35754 transitions. [2018-07-24 12:55:53,972 INFO L78 Accepts]: Start accepts. Automaton has 28363 states and 35754 transitions. Word has length 309 [2018-07-24 12:55:53,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:55:53,972 INFO L471 AbstractCegarLoop]: Abstraction has 28363 states and 35754 transitions. [2018-07-24 12:55:53,972 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:55:53,972 INFO L276 IsEmpty]: Start isEmpty. Operand 28363 states and 35754 transitions. [2018-07-24 12:55:54,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2018-07-24 12:55:54,015 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:55:54,016 INFO L353 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:55:54,016 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:55:54,018 INFO L82 PathProgramCache]: Analyzing trace with hash -2101742122, now seen corresponding path program 1 times [2018-07-24 12:55:54,018 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:55:54,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:54,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:54,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:54,019 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:55:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-07-24 12:55:54,338 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:55:54,338 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-07-24 12:55:54,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:54,355 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:55:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:54,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:55:54,786 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-07-24 12:55:54,786 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:55:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-07-24 12:55:54,934 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:55:54,935 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 4 [2018-07-24 12:55:54,935 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:55:54,935 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:55:54,935 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:55:54,936 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:55:54,936 INFO L87 Difference]: Start difference. First operand 28363 states and 35754 transitions. Second operand 3 states. [2018-07-24 12:55:56,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:55:56,067 INFO L93 Difference]: Finished difference Result 56717 states and 71500 transitions. [2018-07-24 12:55:56,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:55:56,067 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2018-07-24 12:55:56,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:55:56,154 INFO L225 Difference]: With dead ends: 56717 [2018-07-24 12:55:56,154 INFO L226 Difference]: Without dead ends: 28360 [2018-07-24 12:55:56,190 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 679 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:55:56,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28360 states. [2018-07-24 12:55:56,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28360 to 28360. [2018-07-24 12:55:56,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28360 states. [2018-07-24 12:55:56,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28360 states to 28360 states and 35746 transitions. [2018-07-24 12:55:56,718 INFO L78 Accepts]: Start accepts. Automaton has 28360 states and 35746 transitions. Word has length 341 [2018-07-24 12:55:56,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:55:56,719 INFO L471 AbstractCegarLoop]: Abstraction has 28360 states and 35746 transitions. [2018-07-24 12:55:56,719 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:55:56,719 INFO L276 IsEmpty]: Start isEmpty. Operand 28360 states and 35746 transitions. [2018-07-24 12:55:56,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2018-07-24 12:55:56,769 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:55:56,769 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:55:56,770 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:55:56,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1468846564, now seen corresponding path program 1 times [2018-07-24 12:55:56,770 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:55:56,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:56,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:56,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:56,771 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:55:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-07-24 12:55:57,123 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:55:57,123 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:55:57,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:57,132 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:55:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:57,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:55:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-07-24 12:55:57,484 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:55:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-07-24 12:55:57,657 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:55:57,658 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:55:57,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:57,674 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:55:58,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:58,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:55:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-07-24 12:55:58,418 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:55:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-07-24 12:55:58,638 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:55:58,638 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 7 [2018-07-24 12:55:58,638 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:55:58,639 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:55:58,639 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:55:58,639 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:55:58,639 INFO L87 Difference]: Start difference. First operand 28360 states and 35746 transitions. Second operand 6 states. [2018-07-24 12:56:02,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:56:02,495 INFO L93 Difference]: Finished difference Result 65436 states and 85982 transitions. [2018-07-24 12:56:02,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:56:02,495 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 348 [2018-07-24 12:56:02,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:56:02,620 INFO L225 Difference]: With dead ends: 65436 [2018-07-24 12:56:02,620 INFO L226 Difference]: Without dead ends: 37082 [2018-07-24 12:56:02,685 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1402 GetRequests, 1394 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-07-24 12:56:02,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37082 states. [2018-07-24 12:56:03,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37082 to 36329. [2018-07-24 12:56:03,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36329 states. [2018-07-24 12:56:03,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36329 states to 36329 states and 44704 transitions. [2018-07-24 12:56:03,561 INFO L78 Accepts]: Start accepts. Automaton has 36329 states and 44704 transitions. Word has length 348 [2018-07-24 12:56:03,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:56:03,562 INFO L471 AbstractCegarLoop]: Abstraction has 36329 states and 44704 transitions. [2018-07-24 12:56:03,562 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:56:03,562 INFO L276 IsEmpty]: Start isEmpty. Operand 36329 states and 44704 transitions. [2018-07-24 12:56:03,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2018-07-24 12:56:03,612 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:56:03,612 INFO L353 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:56:03,613 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:56:03,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1242777461, now seen corresponding path program 1 times [2018-07-24 12:56:03,613 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:56:03,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:56:03,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:56:03,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:56:03,614 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:56:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:56:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:56:04,287 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:56:04,287 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:56:04,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:56:04,295 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:56:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:56:04,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:56:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-07-24 12:56:04,769 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:56:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-07-24 12:56:04,936 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:56:04,936 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-07-24 12:56:04,936 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:56:04,937 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:56:04,937 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:56:04,937 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:56:04,937 INFO L87 Difference]: Start difference. First operand 36329 states and 44704 transitions. Second operand 3 states. [2018-07-24 12:56:06,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:56:06,771 INFO L93 Difference]: Finished difference Result 69788 states and 86150 transitions. [2018-07-24 12:56:06,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:56:06,772 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 347 [2018-07-24 12:56:06,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:56:06,843 INFO L225 Difference]: With dead ends: 69788 [2018-07-24 12:56:06,843 INFO L226 Difference]: Without dead ends: 34076 [2018-07-24 12:56:06,904 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 694 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:56:06,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34076 states. [2018-07-24 12:56:07,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34076 to 34007. [2018-07-24 12:56:07,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34007 states. [2018-07-24 12:56:07,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34007 states to 34007 states and 41209 transitions. [2018-07-24 12:56:07,548 INFO L78 Accepts]: Start accepts. Automaton has 34007 states and 41209 transitions. Word has length 347 [2018-07-24 12:56:07,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:56:07,548 INFO L471 AbstractCegarLoop]: Abstraction has 34007 states and 41209 transitions. [2018-07-24 12:56:07,548 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:56:07,548 INFO L276 IsEmpty]: Start isEmpty. Operand 34007 states and 41209 transitions. [2018-07-24 12:56:07,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-07-24 12:56:07,600 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:56:07,600 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:56:07,600 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:56:07,601 INFO L82 PathProgramCache]: Analyzing trace with hash -789499307, now seen corresponding path program 1 times [2018-07-24 12:56:07,601 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:56:07,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:56:07,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:56:07,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:56:07,602 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:56:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:56:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 239 proven. 64 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-07-24 12:56:08,086 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:56:08,086 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-07-24 12:56:08,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:56:08,095 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:56:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:56:08,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:56:08,559 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2018-07-24 12:56:08,559 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:56:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2018-07-24 12:56:08,734 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:56:08,734 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2018-07-24 12:56:08,735 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:56:08,735 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:56:08,735 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:56:08,735 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:56:08,736 INFO L87 Difference]: Start difference. First operand 34007 states and 41209 transitions. Second operand 3 states. [2018-07-24 12:56:10,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:56:10,297 INFO L93 Difference]: Finished difference Result 66332 states and 80468 transitions. [2018-07-24 12:56:10,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:56:10,297 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 387 [2018-07-24 12:56:10,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:56:10,352 INFO L225 Difference]: With dead ends: 66332 [2018-07-24 12:56:10,352 INFO L226 Difference]: Without dead ends: 34010 [2018-07-24 12:56:10,387 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 774 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:56:10,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34010 states. [2018-07-24 12:56:11,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34010 to 33635. [2018-07-24 12:56:11,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33635 states. [2018-07-24 12:56:11,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33635 states to 33635 states and 39758 transitions. [2018-07-24 12:56:11,533 INFO L78 Accepts]: Start accepts. Automaton has 33635 states and 39758 transitions. Word has length 387 [2018-07-24 12:56:11,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:56:11,534 INFO L471 AbstractCegarLoop]: Abstraction has 33635 states and 39758 transitions. [2018-07-24 12:56:11,534 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:56:11,535 INFO L276 IsEmpty]: Start isEmpty. Operand 33635 states and 39758 transitions. [2018-07-24 12:56:11,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2018-07-24 12:56:11,589 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:56:11,589 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:56:11,589 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:56:11,590 INFO L82 PathProgramCache]: Analyzing trace with hash 529203655, now seen corresponding path program 1 times [2018-07-24 12:56:11,590 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:56:11,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:56:11,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:56:11,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:56:11,591 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:56:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:56:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 220 proven. 23 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-07-24 12:56:12,245 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:56:12,245 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:56:12,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:56:12,254 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:56:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:56:12,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:56:12,842 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 241 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-07-24 12:56:12,842 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:56:12,959 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 220 proven. 23 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-07-24 12:56:12,980 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:56:12,981 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:56:13,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:56:13,004 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:56:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:56:13,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:56:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 241 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-07-24 12:56:14,173 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:56:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 220 proven. 23 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-07-24 12:56:14,465 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:56:14,466 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 6, 5] total 15 [2018-07-24 12:56:14,466 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:56:14,467 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 12:56:14,468 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 12:56:14,468 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:56:14,468 INFO L87 Difference]: Start difference. First operand 33635 states and 39758 transitions. Second operand 7 states. [2018-07-24 12:56:18,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:56:18,100 INFO L93 Difference]: Finished difference Result 64093 states and 78095 transitions. [2018-07-24 12:56:18,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:56:18,100 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 403 [2018-07-24 12:56:18,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:56:18,179 INFO L225 Difference]: With dead ends: 64093 [2018-07-24 12:56:18,179 INFO L226 Difference]: Without dead ends: 31922 [2018-07-24 12:56:18,211 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1620 GetRequests, 1603 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:56:18,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31922 states. [2018-07-24 12:56:18,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31922 to 30976. [2018-07-24 12:56:18,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30976 states. [2018-07-24 12:56:18,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30976 states to 30976 states and 35686 transitions. [2018-07-24 12:56:18,763 INFO L78 Accepts]: Start accepts. Automaton has 30976 states and 35686 transitions. Word has length 403 [2018-07-24 12:56:18,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:56:18,764 INFO L471 AbstractCegarLoop]: Abstraction has 30976 states and 35686 transitions. [2018-07-24 12:56:18,764 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 12:56:18,764 INFO L276 IsEmpty]: Start isEmpty. Operand 30976 states and 35686 transitions. [2018-07-24 12:56:18,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2018-07-24 12:56:18,810 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:56:18,811 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 12:56:18,811 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:56:18,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1734578733, now seen corresponding path program 1 times [2018-07-24 12:56:18,811 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:56:18,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:56:18,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:56:18,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:56:18,812 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:56:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:56:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 323 proven. 55 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-24 12:56:20,382 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:56:20,383 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-07-24 12:56:20,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:56:20,399 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:56:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:56:20,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:56:20,960 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 347 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-07-24 12:56:20,961 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:56:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 347 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-07-24 12:56:21,219 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:56:21,220 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-07-24 12:56:21,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:56:21,235 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:56:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:56:22,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:56:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 347 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-07-24 12:56:22,144 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:56:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 347 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-07-24 12:56:22,327 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:56:22,327 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 17 [2018-07-24 12:56:22,327 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:56:22,328 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 12:56:22,328 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 12:56:22,329 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:56:22,329 INFO L87 Difference]: Start difference. First operand 30976 states and 35686 transitions. Second operand 13 states. [2018-07-24 12:56:36,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:56:36,637 INFO L93 Difference]: Finished difference Result 279710 states and 397451 transitions. [2018-07-24 12:56:36,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-07-24 12:56:36,638 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 422 [2018-07-24 12:56:36,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:56:37,740 INFO L225 Difference]: With dead ends: 279710 [2018-07-24 12:56:37,741 INFO L226 Difference]: Without dead ends: 251623 [2018-07-24 12:56:37,891 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1777 GetRequests, 1704 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=829, Invalid=3727, Unknown=0, NotChecked=0, Total=4556 [2018-07-24 12:56:38,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251623 states. [2018-07-24 12:56:44,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251623 to 244368. [2018-07-24 12:56:44,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244368 states. [2018-07-24 12:56:46,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244368 states to 244368 states and 325672 transitions. [2018-07-24 12:56:46,638 INFO L78 Accepts]: Start accepts. Automaton has 244368 states and 325672 transitions. Word has length 422 [2018-07-24 12:56:46,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:56:46,639 INFO L471 AbstractCegarLoop]: Abstraction has 244368 states and 325672 transitions. [2018-07-24 12:56:46,639 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 12:56:46,639 INFO L276 IsEmpty]: Start isEmpty. Operand 244368 states and 325672 transitions. [2018-07-24 12:56:46,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-07-24 12:56:46,860 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:56:46,860 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:56:46,860 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:56:46,861 INFO L82 PathProgramCache]: Analyzing trace with hash 188946153, now seen corresponding path program 1 times [2018-07-24 12:56:46,861 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:56:46,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:56:46,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:56:46,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:56:46,862 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:56:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:56:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 250 proven. 23 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-07-24 12:56:47,401 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:56:47,401 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-07-24 12:56:47,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:56:47,414 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:56:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:56:47,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:56:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 227 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-07-24 12:56:47,991 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:56:48,327 WARN L169 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-07-24 12:56:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 223 proven. 93 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-07-24 12:56:48,500 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:56:48,501 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 12:56:48,501 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:56:48,501 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:56:48,502 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:56:48,502 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:56:48,502 INFO L87 Difference]: Start difference. First operand 244368 states and 325672 transitions. Second operand 5 states. [2018-07-24 12:57:12,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:57:12,197 INFO L93 Difference]: Finished difference Result 686512 states and 977646 transitions. [2018-07-24 12:57:12,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:57:12,198 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 435 [2018-07-24 12:57:12,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:57:15,262 INFO L225 Difference]: With dead ends: 686512 [2018-07-24 12:57:15,262 INFO L226 Difference]: Without dead ends: 446961 [2018-07-24 12:57:15,776 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 866 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:57:16,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446961 states. [2018-07-24 12:57:28,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446961 to 427504. [2018-07-24 12:57:28,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427504 states. [2018-07-24 12:57:32,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427504 states to 427504 states and 568585 transitions. [2018-07-24 12:57:32,172 INFO L78 Accepts]: Start accepts. Automaton has 427504 states and 568585 transitions. Word has length 435 [2018-07-24 12:57:32,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:57:32,173 INFO L471 AbstractCegarLoop]: Abstraction has 427504 states and 568585 transitions. [2018-07-24 12:57:32,173 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:57:32,173 INFO L276 IsEmpty]: Start isEmpty. Operand 427504 states and 568585 transitions. [2018-07-24 12:57:32,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2018-07-24 12:57:32,484 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:57:32,485 INFO L353 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:57:32,485 INFO L414 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:57:32,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1870214908, now seen corresponding path program 1 times [2018-07-24 12:57:32,485 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:57:32,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:57:32,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:57:32,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:57:32,486 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:57:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:57:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 300 proven. 81 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-07-24 12:57:33,041 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:57:33,041 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:57:33,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:57:33,048 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:57:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:57:33,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:57:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 235 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-07-24 12:57:33,590 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:57:34,896 WARN L169 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2018-07-24 12:57:35,416 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 229 proven. 127 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2018-07-24 12:57:35,439 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:57:35,439 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 15 [2018-07-24 12:57:35,439 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:57:35,440 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:57:35,440 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:57:35,440 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:57:35,441 INFO L87 Difference]: Start difference. First operand 427504 states and 568585 transitions. Second operand 5 states. [2018-07-24 12:58:10,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:58:10,295 INFO L93 Difference]: Finished difference Result 972840 states and 1349964 transitions. [2018-07-24 12:58:10,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:58:10,296 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 442 [2018-07-24 12:58:10,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:58:13,415 INFO L225 Difference]: With dead ends: 972840 [2018-07-24 12:58:13,415 INFO L226 Difference]: Without dead ends: 550073 [2018-07-24 12:58:14,932 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 896 GetRequests, 880 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2018-07-24 12:58:15,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550073 states. [2018-07-24 12:58:31,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550073 to 528907. [2018-07-24 12:58:31,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 528907 states. Received shutdown request... [2018-07-24 12:58:33,234 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:58:33,241 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:58:33,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:58:33 BoogieIcfgContainer [2018-07-24 12:58:33,241 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:58:33,242 INFO L168 Benchmark]: Toolchain (without parser) took 213482.76 ms. Allocated memory was 1.5 GB in the beginning and 6.2 GB in the end (delta: 4.7 GB). Free memory was 1.4 GB in the beginning and 3.0 GB in the end (delta: -1.6 GB). Peak memory consumption was 4.9 GB. Max. memory is 7.1 GB. [2018-07-24 12:58:33,243 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 12:58:33,244 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1203.26 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: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 7.1 GB. [2018-07-24 12:58:33,244 INFO L168 Benchmark]: Boogie Procedure Inliner took 157.49 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-24 12:58:33,245 INFO L168 Benchmark]: Boogie Preprocessor took 404.31 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 817.9 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -956.2 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. [2018-07-24 12:58:33,246 INFO L168 Benchmark]: RCFGBuilder took 4832.75 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: 283.7 MB). Peak memory consumption was 283.7 MB. Max. memory is 7.1 GB. [2018-07-24 12:58:33,247 INFO L168 Benchmark]: TraceAbstraction took 206878.81 ms. Allocated memory was 2.4 GB in the beginning and 6.2 GB in the end (delta: 3.9 GB). Free memory was 2.0 GB in the beginning and 3.0 GB in the end (delta: -1.0 GB). Peak memory consumption was 4.6 GB. Max. memory is 7.1 GB. [2018-07-24 12:58:33,253 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 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 1203.26 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: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 157.49 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 404.31 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 817.9 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -956.2 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4832.75 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: 283.7 MB). Peak memory consumption was 283.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 206878.81 ms. Allocated memory was 2.4 GB in the beginning and 6.2 GB in the end (delta: 3.9 GB). Free memory was 2.0 GB in the beginning and 3.0 GB in the end (delta: -1.0 GB). Peak memory consumption was 4.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1617]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1617). Cancelled while ReachableStatesComputation was computing reachable states (490422 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 206.8s OverallTime, 17 OverallIterations, 5 TraceHistogramMax, 123.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4434 SDtfs, 22366 SDslu, 6954 SDs, 0 SdLazy, 23916 SolverSat, 5160 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 38.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13062 GetRequests, 12809 SyntacticMatches, 29 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 12.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=427504occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 49.7s AutomataMinimizationTime, 17 MinimizatonAttempts, 32500 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.5s SsaConstructionTime, 6.9s SatisfiabilityAnalysisTime, 21.2s InterpolantComputationTime, 11820 NumberOfCodeBlocks, 11820 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 18182 ConstructedInterpolants, 0 QuantifiedInterpolants, 14552492 SizeOfPredicates, 50 NumberOfNonLiveVariables, 24261 ConjunctsInSsa, 167 ConjunctsInUnsatCore, 55 InterpolantComputations, 16 PerfectInterpolantSequences, 10137/10874 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label53_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-58-33-275.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label53_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-58-33-275.csv Completed graceful shutdown