java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label35_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 11:37:40,079 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 11:37:40,081 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 11:37:40,095 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 11:37:40,096 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 11:37:40,097 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 11:37:40,098 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 11:37:40,100 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 11:37:40,102 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 11:37:40,103 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 11:37:40,104 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 11:37:40,104 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 11:37:40,105 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 11:37:40,106 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 11:37:40,107 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 11:37:40,108 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 11:37:40,109 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 11:37:40,111 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 11:37:40,113 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 11:37:40,114 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 11:37:40,115 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 11:37:40,117 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 11:37:40,119 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 11:37:40,120 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 11:37:40,120 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 11:37:40,123 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 11:37:40,124 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 11:37:40,125 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 11:37:40,127 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 11:37:40,128 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 11:37:40,128 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 11:37:40,129 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-09-10 11:37:40,134 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-10 11:37:40,167 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 11:37:40,167 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 11:37:40,168 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 11:37:40,168 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 11:37:40,169 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 11:37:40,169 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 11:37:40,169 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 11:37:40,169 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 11:37:40,171 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 11:37:40,171 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 11:37:40,171 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 11:37:40,172 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 11:37:40,172 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 11:37:40,172 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 11:37:40,173 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 11:37:40,173 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 11:37:40,173 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 11:37:40,173 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 11:37:40,173 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 11:37:40,174 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 11:37:40,174 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 11:37:40,174 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 11:37:40,174 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 11:37:40,174 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 11:37:40,177 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 11:37:40,177 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 11:37:40,177 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 11:37:40,177 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 11:37:40,179 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 11:37:40,179 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 11:37:40,179 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 11:37:40,179 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 11:37:40,179 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 11:37:40,247 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 11:37:40,259 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 11:37:40,263 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 11:37:40,264 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 11:37:40,265 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 11:37:40,266 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label35_true-unreach-call.c [2018-09-10 11:37:40,609 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1293332fb/8f7bd9adc0be4a9ca9b9bdbdd275eef6/FLAG5b0a60e0d [2018-09-10 11:37:40,928 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 11:37:40,930 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label35_true-unreach-call.c [2018-09-10 11:37:40,955 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1293332fb/8f7bd9adc0be4a9ca9b9bdbdd275eef6/FLAG5b0a60e0d [2018-09-10 11:37:40,975 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1293332fb/8f7bd9adc0be4a9ca9b9bdbdd275eef6 [2018-09-10 11:37:40,988 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 11:37:40,992 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 11:37:40,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 11:37:40,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 11:37:41,003 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 11:37:41,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 11:37:40" (1/1) ... [2018-09-10 11:37:41,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41f79d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:37:41, skipping insertion in model container [2018-09-10 11:37:41,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 11:37:40" (1/1) ... [2018-09-10 11:37:41,230 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 11:37:41,654 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 11:37:41,674 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 11:37:41,886 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 11:37:41,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:37:41 WrapperNode [2018-09-10 11:37:41,995 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 11:37:41,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 11:37:41,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 11:37:41,997 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 11:37:42,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:37:41" (1/1) ... [2018-09-10 11:37:42,038 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:37:41" (1/1) ... [2018-09-10 11:37:42,143 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 11:37:42,144 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 11:37:42,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 11:37:42,144 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 11:37:42,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:37:41" (1/1) ... [2018-09-10 11:37:42,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:37:41" (1/1) ... [2018-09-10 11:37:42,405 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:37:41" (1/1) ... [2018-09-10 11:37:42,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:37:41" (1/1) ... [2018-09-10 11:37:42,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:37:41" (1/1) ... [2018-09-10 11:37:42,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:37:41" (1/1) ... [2018-09-10 11:37:42,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:37:41" (1/1) ... [2018-09-10 11:37:42,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 11:37:42,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 11:37:42,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 11:37:42,526 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 11:37:42,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:37:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 11:37:42,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 11:37:42,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 11:37:42,605 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-09-10 11:37:42,605 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-09-10 11:37:42,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 11:37:42,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 11:37:42,608 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 11:37:42,608 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 11:37:47,993 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 11:37:47,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 11:37:47 BoogieIcfgContainer [2018-09-10 11:37:47,994 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 11:37:47,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 11:37:47,996 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 11:37:47,999 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 11:37:47,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 11:37:40" (1/3) ... [2018-09-10 11:37:48,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a57a25c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 11:37:48, skipping insertion in model container [2018-09-10 11:37:48,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:37:41" (2/3) ... [2018-09-10 11:37:48,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a57a25c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 11:37:48, skipping insertion in model container [2018-09-10 11:37:48,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 11:37:47" (3/3) ... [2018-09-10 11:37:48,003 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label35_true-unreach-call.c [2018-09-10 11:37:48,013 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 11:37:48,023 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 11:37:48,080 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 11:37:48,081 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 11:37:48,082 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 11:37:48,082 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 11:37:48,082 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 11:37:48,082 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 11:37:48,082 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 11:37:48,083 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 11:37:48,083 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 11:37:48,112 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-09-10 11:37:48,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-10 11:37:48,123 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:37:48,126 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 11:37:48,128 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:37:48,134 INFO L82 PathProgramCache]: Analyzing trace with hash 460642553, now seen corresponding path program 1 times [2018-09-10 11:37:48,137 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:37:48,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:37:48,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:37:48,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:37:48,187 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:37:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:37:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:37:48,754 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 11:37:48,754 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-10 11:37:48,755 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 11:37:48,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 11:37:48,777 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 11:37:48,778 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 11:37:48,781 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 4 states. [2018-09-10 11:37:52,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:37:52,140 INFO L93 Difference]: Finished difference Result 982 states and 1758 transitions. [2018-09-10 11:37:52,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 11:37:52,142 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2018-09-10 11:37:52,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:37:52,166 INFO L225 Difference]: With dead ends: 982 [2018-09-10 11:37:52,166 INFO L226 Difference]: Without dead ends: 683 [2018-09-10 11:37:52,175 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 11:37:52,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2018-09-10 11:37:52,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 683. [2018-09-10 11:37:52,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2018-09-10 11:37:52,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1005 transitions. [2018-09-10 11:37:52,287 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1005 transitions. Word has length 65 [2018-09-10 11:37:52,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:37:52,288 INFO L480 AbstractCegarLoop]: Abstraction has 683 states and 1005 transitions. [2018-09-10 11:37:52,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 11:37:52,290 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1005 transitions. [2018-09-10 11:37:52,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-10 11:37:52,305 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:37:52,305 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 11:37:52,306 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:37:52,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1344478420, now seen corresponding path program 1 times [2018-09-10 11:37:52,306 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:37:52,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:37:52,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:37:52,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:37:52,308 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:37:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:37:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:37:52,698 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 11:37:52,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-10 11:37:52,698 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 11:37:52,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 11:37:52,701 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 11:37:52,701 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 11:37:52,702 INFO L87 Difference]: Start difference. First operand 683 states and 1005 transitions. Second operand 4 states. [2018-09-10 11:37:57,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:37:57,516 INFO L93 Difference]: Finished difference Result 2516 states and 3860 transitions. [2018-09-10 11:37:57,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 11:37:57,517 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2018-09-10 11:37:57,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:37:57,536 INFO L225 Difference]: With dead ends: 2516 [2018-09-10 11:37:57,537 INFO L226 Difference]: Without dead ends: 1839 [2018-09-10 11:37:57,545 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 11:37:57,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2018-09-10 11:37:57,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1821. [2018-09-10 11:37:57,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1821 states. [2018-09-10 11:37:57,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 2605 transitions. [2018-09-10 11:37:57,651 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 2605 transitions. Word has length 139 [2018-09-10 11:37:57,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:37:57,652 INFO L480 AbstractCegarLoop]: Abstraction has 1821 states and 2605 transitions. [2018-09-10 11:37:57,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 11:37:57,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 2605 transitions. [2018-09-10 11:37:57,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-10 11:37:57,661 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:37:57,662 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 11:37:57,662 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:37:57,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1598014071, now seen corresponding path program 1 times [2018-09-10 11:37:57,662 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:37:57,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:37:57,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:37:57,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:37:57,666 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:37:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:37:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:37:58,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:37:58,058 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 11:37:58,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:37:58,074 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:37:58,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:37:58,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:37:58,937 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:37:58,938 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:37:59,290 WARN L175 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-09-10 11:37:59,432 WARN L175 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-09-10 11:37:59,598 WARN L175 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2018-09-10 11:38:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:38:00,340 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 11:38:00,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2018-09-10 11:38:00,341 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 11:38:00,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 11:38:00,343 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 11:38:00,343 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-09-10 11:38:00,344 INFO L87 Difference]: Start difference. First operand 1821 states and 2605 transitions. Second operand 5 states. [2018-09-10 11:38:06,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:38:06,775 INFO L93 Difference]: Finished difference Result 5369 states and 7794 transitions. [2018-09-10 11:38:06,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 11:38:06,776 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2018-09-10 11:38:06,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:38:06,800 INFO L225 Difference]: With dead ends: 5369 [2018-09-10 11:38:06,800 INFO L226 Difference]: Without dead ends: 3359 [2018-09-10 11:38:06,811 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 317 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-09-10 11:38:06,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3359 states. [2018-09-10 11:38:06,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3359 to 3119. [2018-09-10 11:38:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3119 states. [2018-09-10 11:38:06,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3119 states to 3119 states and 4544 transitions. [2018-09-10 11:38:06,918 INFO L78 Accepts]: Start accepts. Automaton has 3119 states and 4544 transitions. Word has length 160 [2018-09-10 11:38:06,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:38:06,919 INFO L480 AbstractCegarLoop]: Abstraction has 3119 states and 4544 transitions. [2018-09-10 11:38:06,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 11:38:06,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3119 states and 4544 transitions. [2018-09-10 11:38:06,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-09-10 11:38:06,928 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:38:06,929 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 11:38:06,929 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:38:06,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1190624837, now seen corresponding path program 1 times [2018-09-10 11:38:06,930 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:38:06,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:38:06,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:38:06,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:38:06,931 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:38:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:38:07,254 WARN L175 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 11:38:07,687 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 116 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 11:38:07,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:38:07,689 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 11:38:07,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:38:07,708 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:38:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:38:07,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:38:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-09-10 11:38:08,247 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:38:08,439 WARN L175 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-10 11:38:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 116 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 11:38:08,796 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 11:38:08,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-10 11:38:08,796 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 11:38:08,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 11:38:08,797 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 11:38:08,797 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 11:38:08,798 INFO L87 Difference]: Start difference. First operand 3119 states and 4544 transitions. Second operand 5 states. [2018-09-10 11:38:14,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:38:14,721 INFO L93 Difference]: Finished difference Result 7944 states and 11628 transitions. [2018-09-10 11:38:14,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 11:38:14,721 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 233 [2018-09-10 11:38:14,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:38:14,748 INFO L225 Difference]: With dead ends: 7944 [2018-09-10 11:38:14,748 INFO L226 Difference]: Without dead ends: 4831 [2018-09-10 11:38:14,766 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 461 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-09-10 11:38:14,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4831 states. [2018-09-10 11:38:14,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4831 to 4693. [2018-09-10 11:38:14,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4693 states. [2018-09-10 11:38:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4693 states to 4693 states and 6518 transitions. [2018-09-10 11:38:14,902 INFO L78 Accepts]: Start accepts. Automaton has 4693 states and 6518 transitions. Word has length 233 [2018-09-10 11:38:14,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:38:14,903 INFO L480 AbstractCegarLoop]: Abstraction has 4693 states and 6518 transitions. [2018-09-10 11:38:14,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 11:38:14,903 INFO L276 IsEmpty]: Start isEmpty. Operand 4693 states and 6518 transitions. [2018-09-10 11:38:14,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-09-10 11:38:14,918 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:38:14,918 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 11:38:14,919 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:38:14,919 INFO L82 PathProgramCache]: Analyzing trace with hash 2115642399, now seen corresponding path program 1 times [2018-09-10 11:38:14,919 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:38:14,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:38:14,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:38:14,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:38:14,920 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:38:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:38:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-09-10 11:38:15,873 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:38:15,873 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 11:38:15,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:38:15,880 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:38:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:38:15,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:38:16,400 WARN L175 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2018-09-10 11:38:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-09-10 11:38:16,512 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:38:17,104 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-09-10 11:38:17,124 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 11:38:17,124 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 11 [2018-09-10 11:38:17,124 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 11:38:17,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 11:38:17,125 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 11:38:17,125 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-09-10 11:38:17,126 INFO L87 Difference]: Start difference. First operand 4693 states and 6518 transitions. Second operand 6 states. [2018-09-10 11:38:22,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:38:22,451 INFO L93 Difference]: Finished difference Result 12143 states and 17781 transitions. [2018-09-10 11:38:22,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 11:38:22,453 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 277 [2018-09-10 11:38:22,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:38:22,499 INFO L225 Difference]: With dead ends: 12143 [2018-09-10 11:38:22,499 INFO L226 Difference]: Without dead ends: 7645 [2018-09-10 11:38:22,529 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 549 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-09-10 11:38:22,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7645 states. [2018-09-10 11:38:22,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7645 to 7146. [2018-09-10 11:38:22,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7146 states. [2018-09-10 11:38:22,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7146 states to 7146 states and 10091 transitions. [2018-09-10 11:38:22,724 INFO L78 Accepts]: Start accepts. Automaton has 7146 states and 10091 transitions. Word has length 277 [2018-09-10 11:38:22,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:38:22,725 INFO L480 AbstractCegarLoop]: Abstraction has 7146 states and 10091 transitions. [2018-09-10 11:38:22,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 11:38:22,725 INFO L276 IsEmpty]: Start isEmpty. Operand 7146 states and 10091 transitions. [2018-09-10 11:38:22,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-09-10 11:38:22,752 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:38:22,752 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 11:38:22,753 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:38:22,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1783736515, now seen corresponding path program 1 times [2018-09-10 11:38:22,754 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:38:22,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:38:22,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:38:22,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:38:22,755 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:38:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:38:23,150 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 215 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:38:23,150 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:38:23,150 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 11:38:23,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:38:23,162 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:38:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:38:23,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:38:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-09-10 11:38:23,372 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:38:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-09-10 11:38:23,615 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 11:38:23,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-10 11:38:23,615 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 11:38:23,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 11:38:23,616 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 11:38:23,616 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-09-10 11:38:23,617 INFO L87 Difference]: Start difference. First operand 7146 states and 10091 transitions. Second operand 3 states. [2018-09-10 11:38:25,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:38:25,174 INFO L93 Difference]: Finished difference Result 19155 states and 28625 transitions. [2018-09-10 11:38:25,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 11:38:25,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 300 [2018-09-10 11:38:25,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:38:25,243 INFO L225 Difference]: With dead ends: 19155 [2018-09-10 11:38:25,243 INFO L226 Difference]: Without dead ends: 12204 [2018-09-10 11:38:25,301 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 600 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-09-10 11:38:25,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12204 states. [2018-09-10 11:38:25,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12204 to 11854. [2018-09-10 11:38:25,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11854 states. [2018-09-10 11:38:25,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11854 states to 11854 states and 15992 transitions. [2018-09-10 11:38:25,603 INFO L78 Accepts]: Start accepts. Automaton has 11854 states and 15992 transitions. Word has length 300 [2018-09-10 11:38:25,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:38:25,604 INFO L480 AbstractCegarLoop]: Abstraction has 11854 states and 15992 transitions. [2018-09-10 11:38:25,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 11:38:25,604 INFO L276 IsEmpty]: Start isEmpty. Operand 11854 states and 15992 transitions. [2018-09-10 11:38:25,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-09-10 11:38:25,665 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:38:25,665 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 11:38:25,666 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:38:25,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1190197308, now seen corresponding path program 1 times [2018-09-10 11:38:25,667 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:38:25,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:38:25,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:38:25,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:38:25,668 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:38:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:38:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 244 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:38:26,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:38:26,375 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 11:38:26,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:38:26,388 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:38:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:38:26,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:38:26,774 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-09-10 11:38:26,775 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:38:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-09-10 11:38:26,903 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 11:38:26,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 9 [2018-09-10 11:38:26,904 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 11:38:26,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 11:38:26,904 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 11:38:26,904 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-09-10 11:38:26,905 INFO L87 Difference]: Start difference. First operand 11854 states and 15992 transitions. Second operand 3 states. [2018-09-10 11:38:28,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:38:28,094 INFO L93 Difference]: Finished difference Result 23509 states and 31814 transitions. [2018-09-10 11:38:28,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 11:38:28,094 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 350 [2018-09-10 11:38:28,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:38:28,145 INFO L225 Difference]: With dead ends: 23509 [2018-09-10 11:38:28,145 INFO L226 Difference]: Without dead ends: 11850 [2018-09-10 11:38:28,180 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 697 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-09-10 11:38:28,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11850 states. [2018-09-10 11:38:28,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11850 to 11850. [2018-09-10 11:38:28,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11850 states. [2018-09-10 11:38:28,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11850 states to 11850 states and 15979 transitions. [2018-09-10 11:38:28,449 INFO L78 Accepts]: Start accepts. Automaton has 11850 states and 15979 transitions. Word has length 350 [2018-09-10 11:38:28,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:38:28,450 INFO L480 AbstractCegarLoop]: Abstraction has 11850 states and 15979 transitions. [2018-09-10 11:38:28,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 11:38:28,450 INFO L276 IsEmpty]: Start isEmpty. Operand 11850 states and 15979 transitions. [2018-09-10 11:38:28,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-09-10 11:38:28,514 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:38:28,515 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 11:38:28,515 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:38:28,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1869923994, now seen corresponding path program 1 times [2018-09-10 11:38:28,516 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:38:28,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:38:28,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:38:28,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:38:28,517 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:38:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:38:28,964 WARN L175 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-09-10 11:38:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-09-10 11:38:29,017 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 11:38:29,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-10 11:38:29,017 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 11:38:29,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 11:38:29,018 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 11:38:29,018 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 11:38:29,019 INFO L87 Difference]: Start difference. First operand 11850 states and 15979 transitions. Second operand 4 states. [2018-09-10 11:38:32,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:38:32,657 INFO L93 Difference]: Finished difference Result 32708 states and 47676 transitions. [2018-09-10 11:38:32,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 11:38:32,658 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 373 [2018-09-10 11:38:32,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:38:32,748 INFO L225 Difference]: With dead ends: 32708 [2018-09-10 11:38:32,748 INFO L226 Difference]: Without dead ends: 21053 [2018-09-10 11:38:32,812 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 11:38:32,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21053 states. [2018-09-10 11:38:33,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21053 to 21023. [2018-09-10 11:38:33,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21023 states. [2018-09-10 11:38:33,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21023 states to 21023 states and 29529 transitions. [2018-09-10 11:38:33,449 INFO L78 Accepts]: Start accepts. Automaton has 21023 states and 29529 transitions. Word has length 373 [2018-09-10 11:38:33,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:38:33,450 INFO L480 AbstractCegarLoop]: Abstraction has 21023 states and 29529 transitions. [2018-09-10 11:38:33,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 11:38:33,450 INFO L276 IsEmpty]: Start isEmpty. Operand 21023 states and 29529 transitions. [2018-09-10 11:38:33,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2018-09-10 11:38:33,534 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:38:33,534 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 11:38:33,534 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:38:33,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1404058095, now seen corresponding path program 1 times [2018-09-10 11:38:33,535 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:38:33,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:38:33,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:38:33,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:38:33,539 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:38:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:38:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 278 proven. 94 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-09-10 11:38:34,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:38:34,191 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 11:38:34,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:38:34,204 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:38:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:38:34,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:38:34,608 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 310 proven. 2 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-09-10 11:38:34,608 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:38:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 184 proven. 276 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 11:38:34,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:38:34,987 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 11:38:35,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:38:35,007 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:38:35,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:38:35,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:38:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 404 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-09-10 11:38:35,441 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:38:35,969 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 278 proven. 94 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-09-10 11:38:35,971 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 11:38:35,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8, 5, 5] total 17 [2018-09-10 11:38:35,972 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 11:38:35,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-10 11:38:35,973 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-10 11:38:35,973 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-10 11:38:35,973 INFO L87 Difference]: Start difference. First operand 21023 states and 29529 transitions. Second operand 11 states. [2018-09-10 11:38:55,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:38:55,485 INFO L93 Difference]: Finished difference Result 82119 states and 179716 transitions. [2018-09-10 11:38:55,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-10 11:38:55,485 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 395 [2018-09-10 11:38:55,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:38:56,251 INFO L225 Difference]: With dead ends: 82119 [2018-09-10 11:38:56,251 INFO L226 Difference]: Without dead ends: 61291 [2018-09-10 11:38:56,668 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1732 GetRequests, 1638 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2747 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1551, Invalid=6639, Unknown=0, NotChecked=0, Total=8190 [2018-09-10 11:38:56,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61291 states. [2018-09-10 11:38:59,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61291 to 59313. [2018-09-10 11:38:59,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59313 states. [2018-09-10 11:38:59,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59313 states to 59313 states and 105490 transitions. [2018-09-10 11:38:59,941 INFO L78 Accepts]: Start accepts. Automaton has 59313 states and 105490 transitions. Word has length 395 [2018-09-10 11:38:59,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:38:59,941 INFO L480 AbstractCegarLoop]: Abstraction has 59313 states and 105490 transitions. [2018-09-10 11:38:59,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-10 11:38:59,941 INFO L276 IsEmpty]: Start isEmpty. Operand 59313 states and 105490 transitions. [2018-09-10 11:39:00,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2018-09-10 11:39:00,265 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:39:00,265 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 11:39:00,266 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:39:00,266 INFO L82 PathProgramCache]: Analyzing trace with hash -801496546, now seen corresponding path program 1 times [2018-09-10 11:39:00,266 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:39:00,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:39:00,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:39:00,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:39:00,267 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:39:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:39:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 418 proven. 94 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2018-09-10 11:39:00,639 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:39:00,639 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 11:39:00,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:39:00,650 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:39:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:39:00,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:39:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 613 proven. 2 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2018-09-10 11:39:01,549 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:39:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 418 proven. 94 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2018-09-10 11:39:01,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:39:01,793 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 11:39:01,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:39:01,812 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:39:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:39:02,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:39:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 511 proven. 175 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-09-10 11:39:02,558 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:39:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 418 proven. 94 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2018-09-10 11:39:02,769 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 11:39:02,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 6, 5] total 9 [2018-09-10 11:39:02,769 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 11:39:02,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 11:39:02,770 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 11:39:02,770 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-09-10 11:39:02,770 INFO L87 Difference]: Start difference. First operand 59313 states and 105490 transitions. Second operand 7 states. [2018-09-10 11:39:09,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:39:09,046 INFO L93 Difference]: Finished difference Result 121828 states and 240591 transitions. [2018-09-10 11:39:09,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 11:39:09,047 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 454 [2018-09-10 11:39:09,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:39:09,584 INFO L225 Difference]: With dead ends: 121828 [2018-09-10 11:39:09,585 INFO L226 Difference]: Without dead ends: 62024 [2018-09-10 11:39:09,964 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1824 GetRequests, 1810 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-09-10 11:39:10,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62024 states. [2018-09-10 11:39:11,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62024 to 60159. [2018-09-10 11:39:11,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60159 states. [2018-09-10 11:39:12,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60159 states to 60159 states and 95604 transitions. [2018-09-10 11:39:12,424 INFO L78 Accepts]: Start accepts. Automaton has 60159 states and 95604 transitions. Word has length 454 [2018-09-10 11:39:12,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:39:12,425 INFO L480 AbstractCegarLoop]: Abstraction has 60159 states and 95604 transitions. [2018-09-10 11:39:12,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 11:39:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand 60159 states and 95604 transitions. [2018-09-10 11:39:12,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2018-09-10 11:39:12,892 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:39:12,893 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 11:39:12,893 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:39:12,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1704633207, now seen corresponding path program 1 times [2018-09-10 11:39:12,894 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:39:12,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:39:12,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:39:12,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:39:12,895 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:39:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:39:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 332 proven. 330 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2018-09-10 11:39:14,181 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:39:14,181 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-10 11:39:14,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:39:14,190 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:39:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:39:14,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:39:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 634 proven. 2 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2018-09-10 11:39:15,001 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:39:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 423 proven. 89 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2018-09-10 11:39:15,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:39:15,857 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-09-10 11:39:15,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:39:15,872 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:39:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:39:16,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:39:16,563 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 634 proven. 2 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2018-09-10 11:39:16,563 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:39:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 423 proven. 89 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2018-09-10 11:39:17,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 11:39:17,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 5, 5] total 14 [2018-09-10 11:39:17,163 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 11:39:17,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-10 11:39:17,165 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-10 11:39:17,165 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-09-10 11:39:17,165 INFO L87 Difference]: Start difference. First operand 60159 states and 95604 transitions. Second operand 10 states. [2018-09-10 11:39:22,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:39:22,099 INFO L93 Difference]: Finished difference Result 126966 states and 206093 transitions. [2018-09-10 11:39:22,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-10 11:39:22,099 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 575 [2018-09-10 11:39:22,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:39:22,458 INFO L225 Difference]: With dead ends: 126966 [2018-09-10 11:39:22,458 INFO L226 Difference]: Without dead ends: 70056 [2018-09-10 11:39:22,775 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2320 GetRequests, 2295 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2018-09-10 11:39:22,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70056 states. [2018-09-10 11:39:24,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70056 to 69833. [2018-09-10 11:39:24,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69833 states. [2018-09-10 11:39:25,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69833 states to 69833 states and 110020 transitions. [2018-09-10 11:39:25,267 INFO L78 Accepts]: Start accepts. Automaton has 69833 states and 110020 transitions. Word has length 575 [2018-09-10 11:39:25,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:39:25,268 INFO L480 AbstractCegarLoop]: Abstraction has 69833 states and 110020 transitions. [2018-09-10 11:39:25,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-10 11:39:25,268 INFO L276 IsEmpty]: Start isEmpty. Operand 69833 states and 110020 transitions. [2018-09-10 11:39:25,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2018-09-10 11:39:25,842 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:39:25,843 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 11:39:25,843 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:39:25,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1358679287, now seen corresponding path program 1 times [2018-09-10 11:39:25,844 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:39:25,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:39:25,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:39:25,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:39:25,844 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:39:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:39:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 598 proven. 94 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2018-09-10 11:39:26,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:39:26,349 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 11:39:26,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:39:26,357 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:39:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:39:26,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:39:26,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 896 proven. 2 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2018-09-10 11:39:26,886 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:39:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 598 proven. 94 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2018-09-10 11:39:27,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:39:27,565 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 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 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 11:39:27,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:39:27,580 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:39:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:39:28,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:39:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 896 proven. 2 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2018-09-10 11:39:28,244 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:39:28,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 598 proven. 94 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2018-09-10 11:39:28,572 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 11:39:28,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-10 11:39:28,572 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 11:39:28,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 11:39:28,574 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 11:39:28,574 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 11:39:28,574 INFO L87 Difference]: Start difference. First operand 69833 states and 110020 transitions. Second operand 9 states. [2018-09-10 11:39:34,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:39:34,515 INFO L93 Difference]: Finished difference Result 135949 states and 223187 transitions. [2018-09-10 11:39:34,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-10 11:39:34,516 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 614 [2018-09-10 11:39:34,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:39:34,802 INFO L225 Difference]: With dead ends: 135949 [2018-09-10 11:39:34,802 INFO L226 Difference]: Without dead ends: 65089 [2018-09-10 11:39:35,144 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2474 GetRequests, 2452 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2018-09-10 11:39:35,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65089 states. [2018-09-10 11:39:36,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65089 to 61815. [2018-09-10 11:39:36,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61815 states. [2018-09-10 11:39:36,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61815 states to 61815 states and 87492 transitions. [2018-09-10 11:39:36,573 INFO L78 Accepts]: Start accepts. Automaton has 61815 states and 87492 transitions. Word has length 614 [2018-09-10 11:39:36,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:39:36,574 INFO L480 AbstractCegarLoop]: Abstraction has 61815 states and 87492 transitions. [2018-09-10 11:39:36,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 11:39:36,574 INFO L276 IsEmpty]: Start isEmpty. Operand 61815 states and 87492 transitions. [2018-09-10 11:39:36,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2018-09-10 11:39:36,819 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:39:36,819 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 11:39:36,820 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:39:36,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1171554788, now seen corresponding path program 1 times [2018-09-10 11:39:36,820 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:39:36,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:39:36,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:39:36,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:39:36,821 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:39:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:39:37,423 WARN L175 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 4 [2018-09-10 11:39:37,687 WARN L175 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 8 [2018-09-10 11:39:37,898 WARN L175 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-10 11:39:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 844 proven. 111 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2018-09-10 11:39:39,153 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:39:39,153 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 11:39:39,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:39:39,165 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:39:39,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:39:39,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:39:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 669 proven. 2 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2018-09-10 11:39:39,855 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:39:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 669 proven. 2 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2018-09-10 11:39:40,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:39:40,876 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 11:39:41,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:39:41,107 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:39:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:39:41,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:39:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 1057 proven. 12 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2018-09-10 11:39:42,076 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:39:42,259 WARN L175 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-09-10 11:39:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 669 proven. 2 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2018-09-10 11:39:43,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 11:39:43,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6, 6, 9, 5] total 31 [2018-09-10 11:39:43,027 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 11:39:43,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-10 11:39:43,028 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-10 11:39:43,029 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2018-09-10 11:39:43,029 INFO L87 Difference]: Start difference. First operand 61815 states and 87492 transitions. Second operand 20 states. [2018-09-10 11:39:49,452 WARN L175 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2018-09-10 11:39:56,742 WARN L175 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2018-09-10 11:40:04,402 WARN L175 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 29 [2018-09-10 11:40:08,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:40:08,821 INFO L93 Difference]: Finished difference Result 139539 states and 202343 transitions. [2018-09-10 11:40:08,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-10 11:40:08,821 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 615 [2018-09-10 11:40:08,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:40:09,253 INFO L225 Difference]: With dead ends: 139539 [2018-09-10 11:40:09,253 INFO L226 Difference]: Without dead ends: 69377 [2018-09-10 11:40:09,662 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2596 GetRequests, 2496 SyntacticMatches, 6 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2628 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1498, Invalid=7622, Unknown=0, NotChecked=0, Total=9120 [2018-09-10 11:40:09,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69377 states. [2018-09-10 11:40:10,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69377 to 62126. [2018-09-10 11:40:10,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62126 states. [2018-09-10 11:40:11,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62126 states to 62126 states and 80661 transitions. [2018-09-10 11:40:11,584 INFO L78 Accepts]: Start accepts. Automaton has 62126 states and 80661 transitions. Word has length 615 [2018-09-10 11:40:11,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:40:11,585 INFO L480 AbstractCegarLoop]: Abstraction has 62126 states and 80661 transitions. [2018-09-10 11:40:11,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-10 11:40:11,586 INFO L276 IsEmpty]: Start isEmpty. Operand 62126 states and 80661 transitions. [2018-09-10 11:40:11,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 649 [2018-09-10 11:40:11,763 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:40:11,763 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 11:40:11,763 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:40:11,764 INFO L82 PathProgramCache]: Analyzing trace with hash 826406864, now seen corresponding path program 1 times [2018-09-10 11:40:11,764 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:40:11,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:40:11,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:40:11,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:40:11,765 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:40:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:40:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 597 proven. 94 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2018-09-10 11:40:12,431 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:40:12,431 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 11:40:12,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:40:12,448 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:40:12,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:40:12,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:40:13,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 903 proven. 2 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2018-09-10 11:40:13,063 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:40:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 597 proven. 94 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2018-09-10 11:40:13,682 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:40:13,682 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 11:40:13,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:40:13,700 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:40:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:40:14,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:40:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 903 proven. 2 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2018-09-10 11:40:14,963 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:40:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 597 proven. 94 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2018-09-10 11:40:15,368 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 11:40:15,368 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 7 [2018-09-10 11:40:15,368 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 11:40:15,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 11:40:15,370 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 11:40:15,370 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-10 11:40:15,370 INFO L87 Difference]: Start difference. First operand 62126 states and 80661 transitions. Second operand 6 states. [2018-09-10 11:40:19,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:40:19,242 INFO L93 Difference]: Finished difference Result 129357 states and 173486 transitions. [2018-09-10 11:40:19,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-10 11:40:19,242 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 648 [2018-09-10 11:40:19,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:40:19,516 INFO L225 Difference]: With dead ends: 129357 [2018-09-10 11:40:19,516 INFO L226 Difference]: Without dead ends: 70065 [2018-09-10 11:40:19,782 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2605 GetRequests, 2591 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-09-10 11:40:19,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70065 states. [2018-09-10 11:40:23,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70065 to 68076. [2018-09-10 11:40:23,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68076 states. [2018-09-10 11:40:23,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68076 states to 68076 states and 88747 transitions. [2018-09-10 11:40:23,803 INFO L78 Accepts]: Start accepts. Automaton has 68076 states and 88747 transitions. Word has length 648 [2018-09-10 11:40:23,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:40:23,804 INFO L480 AbstractCegarLoop]: Abstraction has 68076 states and 88747 transitions. [2018-09-10 11:40:23,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 11:40:23,804 INFO L276 IsEmpty]: Start isEmpty. Operand 68076 states and 88747 transitions. [2018-09-10 11:40:24,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2018-09-10 11:40:24,095 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:40:24,095 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 11:40:24,095 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:40:24,096 INFO L82 PathProgramCache]: Analyzing trace with hash -331294242, now seen corresponding path program 1 times [2018-09-10 11:40:24,096 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:40:24,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:40:24,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:40:24,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:40:24,097 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:40:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:40:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 699 proven. 94 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2018-09-10 11:40:24,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:40:24,849 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 11:40:24,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:40:24,856 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:40:25,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:40:25,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:40:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 1005 proven. 2 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2018-09-10 11:40:25,771 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:40:26,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 699 proven. 94 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2018-09-10 11:40:26,116 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:40:26,116 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 11:40:26,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:40:26,132 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:40:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:40:26,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:40:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 1005 proven. 2 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2018-09-10 11:40:26,928 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:40:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 699 proven. 94 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2018-09-10 11:40:27,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 11:40:27,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 7 [2018-09-10 11:40:27,413 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 11:40:27,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 11:40:27,414 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 11:40:27,414 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-10 11:40:27,416 INFO L87 Difference]: Start difference. First operand 68076 states and 88747 transitions. Second operand 6 states. [2018-09-10 11:40:31,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:40:31,273 INFO L93 Difference]: Finished difference Result 130177 states and 172902 transitions. [2018-09-10 11:40:31,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-10 11:40:31,274 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 700 [2018-09-10 11:40:31,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:40:31,533 INFO L225 Difference]: With dead ends: 130177 [2018-09-10 11:40:31,533 INFO L226 Difference]: Without dead ends: 62485 [2018-09-10 11:40:31,810 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2813 GetRequests, 2797 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-09-10 11:40:31,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62485 states. [2018-09-10 11:40:32,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62485 to 62063. [2018-09-10 11:40:32,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62063 states. [2018-09-10 11:40:32,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62063 states to 62063 states and 78579 transitions. [2018-09-10 11:40:32,956 INFO L78 Accepts]: Start accepts. Automaton has 62063 states and 78579 transitions. Word has length 700 [2018-09-10 11:40:32,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:40:32,957 INFO L480 AbstractCegarLoop]: Abstraction has 62063 states and 78579 transitions. [2018-09-10 11:40:32,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 11:40:32,957 INFO L276 IsEmpty]: Start isEmpty. Operand 62063 states and 78579 transitions. [2018-09-10 11:40:33,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 766 [2018-09-10 11:40:33,475 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:40:33,475 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 11:40:33,475 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:40:33,476 INFO L82 PathProgramCache]: Analyzing trace with hash -198051570, now seen corresponding path program 1 times [2018-09-10 11:40:33,476 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:40:33,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:40:33,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:40:33,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:40:33,477 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:40:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:40:35,029 WARN L175 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2018-09-10 11:40:35,334 WARN L175 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-09-10 11:40:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1917 backedges. 621 proven. 719 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2018-09-10 11:40:35,864 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:40:35,864 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 11:40:35,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:40:35,872 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:40:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:40:36,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:40:36,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1917 backedges. 1336 proven. 2 refuted. 0 times theorem prover too weak. 579 trivial. 0 not checked. [2018-09-10 11:40:36,416 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:40:37,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1917 backedges. 652 proven. 176 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-09-10 11:40:37,030 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:40:37,030 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 11:40:37,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:40:37,046 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:40:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:40:37,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:40:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1917 backedges. 1336 proven. 2 refuted. 0 times theorem prover too weak. 579 trivial. 0 not checked. [2018-09-10 11:40:37,911 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:40:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1917 backedges. 652 proven. 176 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-09-10 11:40:38,356 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 11:40:38,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 5, 5] total 22 [2018-09-10 11:40:38,357 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 11:40:38,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-10 11:40:38,358 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-10 11:40:38,358 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2018-09-10 11:40:38,359 INFO L87 Difference]: Start difference. First operand 62063 states and 78579 transitions. Second operand 17 states. [2018-09-10 11:40:41,268 WARN L175 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-09-10 11:40:49,043 WARN L175 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 12 [2018-09-10 11:40:56,629 WARN L175 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 22 [2018-09-10 11:41:00,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:41:00,875 INFO L93 Difference]: Finished difference Result 137521 states and 188911 transitions. [2018-09-10 11:41:00,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-10 11:41:00,875 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 765 [2018-09-10 11:41:00,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:41:01,196 INFO L225 Difference]: With dead ends: 137521 [2018-09-10 11:41:01,196 INFO L226 Difference]: Without dead ends: 75649 [2018-09-10 11:41:01,450 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3224 GetRequests, 3118 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3769 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1956, Invalid=8964, Unknown=0, NotChecked=0, Total=10920 [2018-09-10 11:41:01,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75649 states. [2018-09-10 11:41:02,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75649 to 72945. [2018-09-10 11:41:02,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72945 states. [2018-09-10 11:41:03,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72945 states to 72945 states and 87534 transitions. [2018-09-10 11:41:03,057 INFO L78 Accepts]: Start accepts. Automaton has 72945 states and 87534 transitions. Word has length 765 [2018-09-10 11:41:03,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:41:03,058 INFO L480 AbstractCegarLoop]: Abstraction has 72945 states and 87534 transitions. [2018-09-10 11:41:03,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-10 11:41:03,058 INFO L276 IsEmpty]: Start isEmpty. Operand 72945 states and 87534 transitions. [2018-09-10 11:41:03,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 877 [2018-09-10 11:41:03,264 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:41:03,264 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 11:41:03,265 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:41:03,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1594463049, now seen corresponding path program 1 times [2018-09-10 11:41:03,265 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:41:03,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:41:03,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:41:03,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:41:03,266 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:41:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:41:04,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2536 backedges. 452 proven. 8 refuted. 0 times theorem prover too weak. 2076 trivial. 0 not checked. [2018-09-10 11:41:04,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:41:04,061 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 11:41:04,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:41:04,074 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:41:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:41:04,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:41:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2536 backedges. 1401 proven. 0 refuted. 0 times theorem prover too weak. 1135 trivial. 0 not checked. [2018-09-10 11:41:05,261 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:41:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2536 backedges. 452 proven. 8 refuted. 0 times theorem prover too weak. 2076 trivial. 0 not checked. [2018-09-10 11:41:05,978 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 11:41:05,979 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 3 [2018-09-10 11:41:05,979 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 11:41:05,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 11:41:05,980 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 11:41:05,980 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 11:41:05,980 INFO L87 Difference]: Start difference. First operand 72945 states and 87534 transitions. Second operand 3 states. [2018-09-10 11:41:08,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:41:08,252 INFO L93 Difference]: Finished difference Result 128592 states and 155091 transitions. [2018-09-10 11:41:08,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 11:41:08,252 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 876 [2018-09-10 11:41:08,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:41:08,403 INFO L225 Difference]: With dead ends: 128592 [2018-09-10 11:41:08,403 INFO L226 Difference]: Without dead ends: 59202 [2018-09-10 11:41:08,553 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1754 GetRequests, 1753 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 11:41:08,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59202 states. [2018-09-10 11:41:09,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59202 to 59197. [2018-09-10 11:41:09,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59197 states. [2018-09-10 11:41:09,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59197 states to 59197 states and 70691 transitions. [2018-09-10 11:41:09,843 INFO L78 Accepts]: Start accepts. Automaton has 59197 states and 70691 transitions. Word has length 876 [2018-09-10 11:41:09,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:41:09,843 INFO L480 AbstractCegarLoop]: Abstraction has 59197 states and 70691 transitions. [2018-09-10 11:41:09,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 11:41:09,843 INFO L276 IsEmpty]: Start isEmpty. Operand 59197 states and 70691 transitions. [2018-09-10 11:41:09,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 980 [2018-09-10 11:41:09,991 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:41:09,991 INFO L376 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 11:41:09,992 INFO L423 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:41:09,992 INFO L82 PathProgramCache]: Analyzing trace with hash -407299891, now seen corresponding path program 1 times [2018-09-10 11:41:09,992 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:41:09,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:41:09,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:41:09,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:41:09,994 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:41:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:41:11,029 WARN L175 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-09-10 11:41:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3275 backedges. 1769 proven. 548 refuted. 0 times theorem prover too weak. 958 trivial. 0 not checked. [2018-09-10 11:41:13,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:41:13,135 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 11:41:13,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:41:13,142 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:41:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:41:13,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:41:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3275 backedges. 2052 proven. 2 refuted. 0 times theorem prover too weak. 1221 trivial. 0 not checked. [2018-09-10 11:41:13,915 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:41:14,179 WARN L175 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-09-10 11:41:14,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3275 backedges. 991 proven. 186 refuted. 0 times theorem prover too weak. 2098 trivial. 0 not checked. [2018-09-10 11:41:14,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:41:14,966 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 25 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 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 11:41:14,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:41:14,983 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:41:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:41:15,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:41:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3275 backedges. 2052 proven. 2 refuted. 0 times theorem prover too weak. 1221 trivial. 0 not checked. [2018-09-10 11:41:16,717 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:41:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3275 backedges. 991 proven. 186 refuted. 0 times theorem prover too weak. 2098 trivial. 0 not checked. [2018-09-10 11:41:18,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 11:41:18,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 5, 5, 5, 5] total 32 [2018-09-10 11:41:18,157 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 11:41:18,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-10 11:41:18,158 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-10 11:41:18,159 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2018-09-10 11:41:18,159 INFO L87 Difference]: Start difference. First operand 59197 states and 70691 transitions. Second operand 25 states. Received shutdown request... [2018-09-10 11:41:19,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 11:41:19,775 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 11:41:19,780 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 11:41:19,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 11:41:19 BoogieIcfgContainer [2018-09-10 11:41:19,780 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 11:41:19,781 INFO L168 Benchmark]: Toolchain (without parser) took 218792.42 ms. Allocated memory was 1.5 GB in the beginning and 4.8 GB in the end (delta: 3.3 GB). Free memory was 1.4 GB in the beginning and 3.5 GB in the end (delta: -2.1 GB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-09-10 11:41:19,782 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-10 11:41:19,783 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1000.76 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: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2018-09-10 11:41:19,783 INFO L168 Benchmark]: Boogie Procedure Inliner took 147.35 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-10 11:41:19,784 INFO L168 Benchmark]: Boogie Preprocessor took 381.67 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 814.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -936.6 MB). Peak memory consumption was 49.6 MB. Max. memory is 7.1 GB. [2018-09-10 11:41:19,785 INFO L168 Benchmark]: RCFGBuilder took 5468.72 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 210.4 MB). Peak memory consumption was 210.4 MB. Max. memory is 7.1 GB. [2018-09-10 11:41:19,785 INFO L168 Benchmark]: TraceAbstraction took 211784.93 ms. Allocated memory was 2.3 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 2.0 GB in the beginning and 3.5 GB in the end (delta: -1.5 GB). Peak memory consumption was 984.1 MB. Max. memory is 7.1 GB. [2018-09-10 11:41:19,790 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1000.76 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: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 147.35 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 381.67 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 814.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -936.6 MB). Peak memory consumption was 49.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5468.72 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 210.4 MB). Peak memory consumption was 210.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 211784.93 ms. Allocated memory was 2.3 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 2.0 GB in the beginning and 3.5 GB in the end (delta: -1.5 GB). Peak memory consumption was 984.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 180]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 180). Cancelled while BasicCegarLoop was constructing difference of abstraction (59197states) and FLOYD_HOARE automaton (currently 11 states, 25 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 41 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 211.7s OverallTime, 18 OverallIterations, 9 TraceHistogramMax, 135.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3373 SDtfs, 27939 SDslu, 5291 SDs, 0 SdLazy, 60392 SolverSat, 10608 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 86.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27989 GetRequests, 27494 SyntacticMatches, 55 SemanticMatches, 439 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9765 ImplicationChecksByTransitivity, 25.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72945occurred 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: 21.4s AutomataMinimizationTime, 17 MinimizatonAttempts, 20986 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.9s SsaConstructionTime, 7.7s SatisfiabilityAnalysisTime, 35.9s InterpolantComputationTime, 22204 NumberOfCodeBlocks, 22204 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 35824 ConstructedInterpolants, 8 QuantifiedInterpolants, 59145165 SizeOfPredicates, 30 NumberOfNonLiveVariables, 21050 ConjunctsInSsa, 177 ConjunctsInUnsatCore, 66 InterpolantComputations, 12 PerfectInterpolantSequences, 68338/73215 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/Problem11_label35_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_11-41-19-802.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem11_label35_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_11-41-19-802.csv Completed graceful shutdown