java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label26_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:23:42,490 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:23:42,493 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:23:42,515 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:23:42,515 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:23:42,517 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:23:42,519 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:23:42,521 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:23:42,524 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:23:42,531 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:23:42,532 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:23:42,532 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:23:42,533 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:23:42,536 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:23:42,539 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:23:42,540 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:23:42,541 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:23:42,546 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:23:42,550 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:23:42,553 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:23:42,554 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:23:42,555 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:23:42,558 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:23:42,558 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:23:42,558 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:23:42,559 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:23:42,562 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:23:42,562 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:23:42,563 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:23:42,564 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:23:42,566 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:23:42,567 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 12:23:42,567 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:23:42,567 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:23:42,568 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:23:42,569 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:23:42,572 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-07-24 12:23:42,597 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:23:42,597 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:23:42,598 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:23:42,598 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:23:42,599 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:23:42,599 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:23:42,599 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:23:42,599 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:23:42,599 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:23:42,600 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:23:42,600 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:23:42,601 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:23:42,601 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:23:42,602 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:23:42,602 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:23:42,602 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:23:42,602 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:23:42,604 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:23:42,604 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:23:42,604 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:23:42,604 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:23:42,605 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:23:42,605 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:23:42,605 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:23:42,605 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:23:42,606 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:23:42,606 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:23:42,606 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:23:42,606 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:23:42,606 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:23:42,607 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:23:42,607 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:23:42,607 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:23:42,667 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:23:42,680 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:23:42,684 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:23:42,686 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:23:42,687 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:23:42,688 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label26_false-unreach-call.c [2018-07-24 12:23:43,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e84e34531/b1b0ef2fb8864bf5bad3ff331b37d3ef/FLAG0650a3223 [2018-07-24 12:23:43,488 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:23:43,489 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label26_false-unreach-call.c [2018-07-24 12:23:43,519 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e84e34531/b1b0ef2fb8864bf5bad3ff331b37d3ef/FLAG0650a3223 [2018-07-24 12:23:43,535 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e84e34531/b1b0ef2fb8864bf5bad3ff331b37d3ef [2018-07-24 12:23:43,546 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:23:43,548 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:23:43,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:23:43,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:23:43,559 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:23:43,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:23:43" (1/1) ... [2018-07-24 12:23:43,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2df81fe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:23:43, skipping insertion in model container [2018-07-24 12:23:43,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:23:43" (1/1) ... [2018-07-24 12:23:43,804 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:23:44,527 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:23:44,545 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:23:45,034 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:23:45,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:23:45 WrapperNode [2018-07-24 12:23:45,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:23:45,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:23:45,292 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:23:45,292 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:23:45,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:23:45" (1/1) ... [2018-07-24 12:23:45,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:23:45" (1/1) ... [2018-07-24 12:23:45,578 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:23:45,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:23:45,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:23:45,579 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:23:46,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:23:45" (1/1) ... [2018-07-24 12:23:46,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:23:45" (1/1) ... [2018-07-24 12:23:46,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:23:45" (1/1) ... [2018-07-24 12:23:46,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:23:45" (1/1) ... [2018-07-24 12:23:46,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:23:45" (1/1) ... [2018-07-24 12:23:46,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:23:45" (1/1) ... [2018-07-24 12:23:46,377 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:23:45" (1/1) ... [2018-07-24 12:23:46,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:23:46,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:23:46,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:23:46,416 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:23:46,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:23:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:23:46,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:23:46,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:23:46,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:23:46,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:23:46,492 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:23:46,493 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:23:46,493 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output2 [2018-07-24 12:23:46,493 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output2 [2018-07-24 12:23:46,493 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 12:23:46,493 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 12:23:58,143 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:23:58,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:23:58 BoogieIcfgContainer [2018-07-24 12:23:58,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:23:58,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:23:58,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:23:58,148 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:23:58,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:23:43" (1/3) ... [2018-07-24 12:23:58,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a74524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:23:58, skipping insertion in model container [2018-07-24 12:23:58,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:23:45" (2/3) ... [2018-07-24 12:23:58,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a74524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:23:58, skipping insertion in model container [2018-07-24 12:23:58,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:23:58" (3/3) ... [2018-07-24 12:23:58,153 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label26_false-unreach-call.c [2018-07-24 12:23:58,163 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:23:58,172 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:23:58,232 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:23:58,233 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:23:58,233 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:23:58,233 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:23:58,233 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:23:58,233 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:23:58,234 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:23:58,234 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:23:58,234 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:23:58,282 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-07-24 12:23:58,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-07-24 12:23:58,291 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:23:58,293 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:23:58,293 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:23:58,298 INFO L82 PathProgramCache]: Analyzing trace with hash -38244482, now seen corresponding path program 1 times [2018-07-24 12:23:58,301 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:23:58,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:23:58,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:23:58,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:23:58,352 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:23:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:23:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:23:58,799 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:23:58,800 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 12:23:58,800 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:23:58,806 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:23:58,821 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:23:58,822 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:23:58,825 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-07-24 12:24:09,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:24:09,357 INFO L93 Difference]: Finished difference Result 2133 states and 3959 transitions. [2018-07-24 12:24:09,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:24:09,358 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2018-07-24 12:24:09,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:24:09,391 INFO L225 Difference]: With dead ends: 2133 [2018-07-24 12:24:09,391 INFO L226 Difference]: Without dead ends: 1523 [2018-07-24 12:24:09,401 INFO L573 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 [2018-07-24 12:24:09,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2018-07-24 12:24:09,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1516. [2018-07-24 12:24:09,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1516 states. [2018-07-24 12:24:09,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 2287 transitions. [2018-07-24 12:24:09,562 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 2287 transitions. Word has length 35 [2018-07-24 12:24:09,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:24:09,562 INFO L471 AbstractCegarLoop]: Abstraction has 1516 states and 2287 transitions. [2018-07-24 12:24:09,563 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:24:09,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 2287 transitions. [2018-07-24 12:24:09,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-07-24 12:24:09,569 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:24:09,569 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:24:09,569 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:24:09,570 INFO L82 PathProgramCache]: Analyzing trace with hash -430685135, now seen corresponding path program 1 times [2018-07-24 12:24:09,570 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:24:09,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:24:09,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:24:09,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:24:09,571 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:24:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:24:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:24:09,931 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:24:09,931 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:24:09,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:24:09,948 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:24:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:24:10,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:24:14,597 WARN L169 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 42 [2018-07-24 12:24:14,827 WARN L169 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2018-07-24 12:24:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:24:15,049 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:24:16,364 WARN L169 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2018-07-24 12:24:16,368 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,502 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,506 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,511 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,516 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,520 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,525 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,529 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,534 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,538 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,543 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,547 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,552 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,556 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,561 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,567 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,572 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,577 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,582 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,587 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,592 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,596 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,601 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,607 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,611 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,616 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,620 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,625 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,630 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,635 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,640 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,645 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,650 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,654 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,659 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,663 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,668 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,672 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,677 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,682 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,686 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,691 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,695 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,700 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,704 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,709 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,713 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,718 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,722 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,726 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,731 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,735 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,740 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,744 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,748 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,753 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,757 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,762 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,767 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,771 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,776 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,780 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,784 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,789 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,793 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,797 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:16,802 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:24:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:24:17,152 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:24:17,152 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 6] total 16 [2018-07-24 12:24:17,152 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:24:17,153 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 12:24:17,154 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 12:24:17,154 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=187, Unknown=1, NotChecked=0, Total=240 [2018-07-24 12:24:17,154 INFO L87 Difference]: Start difference. First operand 1516 states and 2287 transitions. Second operand 7 states. [2018-07-24 12:24:17,833 WARN L169 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2018-07-24 12:24:46,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:24:46,883 INFO L93 Difference]: Finished difference Result 4861 states and 7624 transitions. [2018-07-24 12:24:46,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:24:46,889 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 110 [2018-07-24 12:24:46,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:24:46,908 INFO L225 Difference]: With dead ends: 4861 [2018-07-24 12:24:46,908 INFO L226 Difference]: Without dead ends: 3351 [2018-07-24 12:24:46,916 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=62, Invalid=209, Unknown=1, NotChecked=0, Total=272 [2018-07-24 12:24:46,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3351 states. [2018-07-24 12:24:47,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3351 to 3346. [2018-07-24 12:24:47,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3346 states. [2018-07-24 12:24:47,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3346 states to 3346 states and 5019 transitions. [2018-07-24 12:24:47,014 INFO L78 Accepts]: Start accepts. Automaton has 3346 states and 5019 transitions. Word has length 110 [2018-07-24 12:24:47,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:24:47,016 INFO L471 AbstractCegarLoop]: Abstraction has 3346 states and 5019 transitions. [2018-07-24 12:24:47,016 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 12:24:47,016 INFO L276 IsEmpty]: Start isEmpty. Operand 3346 states and 5019 transitions. [2018-07-24 12:24:47,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-07-24 12:24:47,029 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:24:47,029 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:24:47,030 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:24:47,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1692759857, now seen corresponding path program 1 times [2018-07-24 12:24:47,030 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:24:47,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:24:47,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:24:47,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:24:47,032 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:24:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:24:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:24:47,425 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:24:47,425 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:24:47,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:24:47,442 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:24:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:24:47,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:24:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:24:47,700 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:24:48,140 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:24:48,172 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:24:48,173 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-07-24 12:24:48,173 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:24:48,175 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:24:48,175 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:24:48,175 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:24:48,175 INFO L87 Difference]: Start difference. First operand 3346 states and 5019 transitions. Second operand 3 states. [2018-07-24 12:24:53,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:24:53,784 INFO L93 Difference]: Finished difference Result 9731 states and 14924 transitions. [2018-07-24 12:24:53,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:24:53,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 123 [2018-07-24 12:24:53,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:24:53,828 INFO L225 Difference]: With dead ends: 9731 [2018-07-24 12:24:53,829 INFO L226 Difference]: Without dead ends: 6391 [2018-07-24 12:24:53,846 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 245 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:24:53,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6391 states. [2018-07-24 12:24:54,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6391 to 6388. [2018-07-24 12:24:54,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6388 states. [2018-07-24 12:24:54,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6388 states to 6388 states and 9559 transitions. [2018-07-24 12:24:54,045 INFO L78 Accepts]: Start accepts. Automaton has 6388 states and 9559 transitions. Word has length 123 [2018-07-24 12:24:54,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:24:54,045 INFO L471 AbstractCegarLoop]: Abstraction has 6388 states and 9559 transitions. [2018-07-24 12:24:54,045 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:24:54,046 INFO L276 IsEmpty]: Start isEmpty. Operand 6388 states and 9559 transitions. [2018-07-24 12:24:54,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-07-24 12:24:54,050 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:24:54,050 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:24:54,051 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:24:54,051 INFO L82 PathProgramCache]: Analyzing trace with hash -819116636, now seen corresponding path program 1 times [2018-07-24 12:24:54,051 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:24:54,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:24:54,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:24:54,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:24:54,057 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:24:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:24:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:24:54,274 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:24:54,274 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:24:54,274 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:24:54,275 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:24:54,275 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:24:54,275 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:24:54,275 INFO L87 Difference]: Start difference. First operand 6388 states and 9559 transitions. Second operand 6 states. [2018-07-24 12:25:14,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:25:14,375 INFO L93 Difference]: Finished difference Result 20825 states and 32035 transitions. [2018-07-24 12:25:14,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:25:14,376 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 132 [2018-07-24 12:25:14,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:25:14,448 INFO L225 Difference]: With dead ends: 20825 [2018-07-24 12:25:14,448 INFO L226 Difference]: Without dead ends: 14443 [2018-07-24 12:25:14,481 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:25:14,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14443 states. [2018-07-24 12:25:14,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14443 to 14387. [2018-07-24 12:25:14,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14387 states. [2018-07-24 12:25:14,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14387 states to 14387 states and 19939 transitions. [2018-07-24 12:25:14,876 INFO L78 Accepts]: Start accepts. Automaton has 14387 states and 19939 transitions. Word has length 132 [2018-07-24 12:25:14,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:25:14,876 INFO L471 AbstractCegarLoop]: Abstraction has 14387 states and 19939 transitions. [2018-07-24 12:25:14,877 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:25:14,877 INFO L276 IsEmpty]: Start isEmpty. Operand 14387 states and 19939 transitions. [2018-07-24 12:25:14,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-07-24 12:25:14,881 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:25:14,882 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:25:14,882 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:25:14,882 INFO L82 PathProgramCache]: Analyzing trace with hash -331258386, now seen corresponding path program 1 times [2018-07-24 12:25:14,882 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:25:14,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:25:14,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:25:14,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:25:14,892 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:25:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:25:15,156 WARN L169 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:25:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 57 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-07-24 12:25:15,594 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:25:15,594 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:25:15,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:25:15,609 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:25:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:25:15,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:25:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:25:15,819 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:25:15,929 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:25:15,952 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:25:15,952 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:25:15,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:25:15,969 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:25:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:25:16,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:25:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-07-24 12:25:16,454 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:25:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-07-24 12:25:16,653 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-07-24 12:25:16,654 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 5, 5] total 12 [2018-07-24 12:25:16,654 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:25:16,655 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:25:16,655 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:25:16,655 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:25:16,656 INFO L87 Difference]: Start difference. First operand 14387 states and 19939 transitions. Second operand 5 states. [2018-07-24 12:25:22,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:25:22,978 INFO L93 Difference]: Finished difference Result 32955 states and 47174 transitions. [2018-07-24 12:25:22,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:25:22,979 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 188 [2018-07-24 12:25:22,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:25:23,042 INFO L225 Difference]: With dead ends: 32955 [2018-07-24 12:25:23,042 INFO L226 Difference]: Without dead ends: 18574 [2018-07-24 12:25:23,090 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 742 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:25:23,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18574 states. [2018-07-24 12:25:23,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18574 to 18544. [2018-07-24 12:25:23,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18544 states. [2018-07-24 12:25:23,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18544 states to 18544 states and 24442 transitions. [2018-07-24 12:25:23,522 INFO L78 Accepts]: Start accepts. Automaton has 18544 states and 24442 transitions. Word has length 188 [2018-07-24 12:25:23,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:25:23,523 INFO L471 AbstractCegarLoop]: Abstraction has 18544 states and 24442 transitions. [2018-07-24 12:25:23,523 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:25:23,523 INFO L276 IsEmpty]: Start isEmpty. Operand 18544 states and 24442 transitions. [2018-07-24 12:25:23,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-07-24 12:25:23,529 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:25:23,529 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:25:23,530 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:25:23,530 INFO L82 PathProgramCache]: Analyzing trace with hash 311722667, now seen corresponding path program 1 times [2018-07-24 12:25:23,530 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:25:23,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:25:23,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:25:23,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:25:23,531 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:25:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:25:23,858 WARN L169 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:25:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:25:24,247 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:25:24,247 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:25:24,247 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:25:24,248 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:25:24,248 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:25:24,249 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:25:24,249 INFO L87 Difference]: Start difference. First operand 18544 states and 24442 transitions. Second operand 6 states. [2018-07-24 12:25:31,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:25:31,868 INFO L93 Difference]: Finished difference Result 37638 states and 49847 transitions. [2018-07-24 12:25:31,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:25:31,869 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 221 [2018-07-24 12:25:31,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:25:31,941 INFO L225 Difference]: With dead ends: 37638 [2018-07-24 12:25:31,941 INFO L226 Difference]: Without dead ends: 19100 [2018-07-24 12:25:31,972 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:25:31,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19100 states. [2018-07-24 12:25:32,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19100 to 18618. [2018-07-24 12:25:32,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18618 states. [2018-07-24 12:25:32,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18618 states to 18618 states and 21792 transitions. [2018-07-24 12:25:32,314 INFO L78 Accepts]: Start accepts. Automaton has 18618 states and 21792 transitions. Word has length 221 [2018-07-24 12:25:32,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:25:32,315 INFO L471 AbstractCegarLoop]: Abstraction has 18618 states and 21792 transitions. [2018-07-24 12:25:32,315 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:25:32,315 INFO L276 IsEmpty]: Start isEmpty. Operand 18618 states and 21792 transitions. [2018-07-24 12:25:32,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-07-24 12:25:32,322 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:25:32,322 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:25:32,323 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:25:32,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1135224840, now seen corresponding path program 1 times [2018-07-24 12:25:32,323 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:25:32,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:25:32,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:25:32,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:25:32,324 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:25:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:25:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 61 proven. 80 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-24 12:25:33,273 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:25:33,273 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-07-24 12:25:33,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:25:33,289 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:25:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:25:33,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:25:33,859 WARN L169 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-07-24 12:25:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-07-24 12:25:34,101 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:25:34,658 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,856 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,859 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,862 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,866 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,869 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,872 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,876 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,879 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,882 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,886 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,889 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,893 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,896 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,899 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,903 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,906 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,909 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,912 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,916 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,919 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,923 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,926 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,930 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,933 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,936 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,939 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,942 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,945 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,948 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,952 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,955 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,959 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,962 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,965 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,968 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,972 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,975 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,978 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,982 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,985 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,988 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,992 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,995 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:34,998 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,002 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,005 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,008 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,012 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,015 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,018 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,021 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,025 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,028 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,031 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,035 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,038 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,042 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,045 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,049 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,052 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,055 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,058 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,062 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,065 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,068 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,072 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,075 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,078 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,082 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,085 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,088 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,091 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,095 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,099 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,102 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,105 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,109 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,112 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:35,115 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 61 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:25:36,048 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:25:36,049 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:25:36,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:25:36,074 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:25:36,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:25:36,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:25:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-07-24 12:25:36,607 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:25:38,115 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,428 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,431 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,434 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,437 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,440 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,443 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,446 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,448 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,451 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,454 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,457 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,460 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,462 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,465 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,468 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,471 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,473 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,476 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,479 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,482 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,484 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,487 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,490 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,493 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,496 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,499 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,502 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,505 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,508 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,511 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,514 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,517 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,520 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,523 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,526 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,529 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,532 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,535 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,538 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,540 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,544 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,547 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,550 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,553 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,556 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,559 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,561 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,564 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,567 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,569 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,572 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,575 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,579 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,582 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,585 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,587 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,590 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,592 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,595 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,598 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,601 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,604 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,606 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,609 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,612 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,615 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,618 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,621 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,623 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,626 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,629 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,632 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,635 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,638 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,642 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,645 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,647 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,650 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:38,653 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:25:39,260 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 61 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:25:39,263 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:25:39,263 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9, 7, 9] total 20 [2018-07-24 12:25:39,263 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:25:39,264 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-24 12:25:39,264 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-24 12:25:39,265 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2018-07-24 12:25:39,265 INFO L87 Difference]: Start difference. First operand 18618 states and 21792 transitions. Second operand 11 states. [2018-07-24 12:25:45,995 WARN L169 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2018-07-24 12:26:22,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:26:22,177 INFO L93 Difference]: Finished difference Result 66872 states and 86018 transitions. [2018-07-24 12:26:22,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-24 12:26:22,178 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 252 [2018-07-24 12:26:22,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:26:22,355 INFO L225 Difference]: With dead ends: 66872 [2018-07-24 12:26:22,355 INFO L226 Difference]: Without dead ends: 48260 [2018-07-24 12:26:22,408 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1033 GetRequests, 994 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=406, Invalid=926, Unknown=0, NotChecked=0, Total=1332 [2018-07-24 12:26:22,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48260 states. [2018-07-24 12:26:23,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48260 to 38213. [2018-07-24 12:26:23,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38213 states. [2018-07-24 12:26:23,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38213 states to 38213 states and 46226 transitions. [2018-07-24 12:26:23,248 INFO L78 Accepts]: Start accepts. Automaton has 38213 states and 46226 transitions. Word has length 252 [2018-07-24 12:26:23,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:26:23,248 INFO L471 AbstractCegarLoop]: Abstraction has 38213 states and 46226 transitions. [2018-07-24 12:26:23,248 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-24 12:26:23,248 INFO L276 IsEmpty]: Start isEmpty. Operand 38213 states and 46226 transitions. [2018-07-24 12:26:23,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-07-24 12:26:23,255 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:26:23,256 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:26:23,256 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:26:23,256 INFO L82 PathProgramCache]: Analyzing trace with hash 45081781, now seen corresponding path program 1 times [2018-07-24 12:26:23,256 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:26:23,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:26:23,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:26:23,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:26:23,257 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:26:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:26:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 56 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:26:23,674 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:26:23,674 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:26:23,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:26:23,683 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:26:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:26:23,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:26:23,915 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2018-07-24 12:26:23,915 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:26:24,107 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2018-07-24 12:26:24,498 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 56 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:26:24,519 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:26:24,519 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 10 [2018-07-24 12:26:24,519 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:26:24,520 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:26:24,520 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:26:24,520 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-07-24 12:26:24,520 INFO L87 Difference]: Start difference. First operand 38213 states and 46226 transitions. Second operand 5 states. [2018-07-24 12:26:34,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:26:34,125 INFO L93 Difference]: Finished difference Result 83365 states and 100869 transitions. [2018-07-24 12:26:34,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:26:34,126 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 274 [2018-07-24 12:26:34,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:26:34,267 INFO L225 Difference]: With dead ends: 83365 [2018-07-24 12:26:34,267 INFO L226 Difference]: Without dead ends: 46027 [2018-07-24 12:26:34,337 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 545 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:26:34,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46027 states. [2018-07-24 12:26:34,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46027 to 42605. [2018-07-24 12:26:34,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42605 states. [2018-07-24 12:26:35,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42605 states to 42605 states and 51224 transitions. [2018-07-24 12:26:35,075 INFO L78 Accepts]: Start accepts. Automaton has 42605 states and 51224 transitions. Word has length 274 [2018-07-24 12:26:35,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:26:35,076 INFO L471 AbstractCegarLoop]: Abstraction has 42605 states and 51224 transitions. [2018-07-24 12:26:35,076 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:26:35,076 INFO L276 IsEmpty]: Start isEmpty. Operand 42605 states and 51224 transitions. [2018-07-24 12:26:35,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2018-07-24 12:26:35,087 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:26:35,087 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:26:35,088 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:26:35,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1870198878, now seen corresponding path program 1 times [2018-07-24 12:26:35,088 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:26:35,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:26:35,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:26:35,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:26:35,089 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:26:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:26:36,121 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 102 proven. 168 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-07-24 12:26:36,121 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:26:36,121 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:26:36,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:26:36,128 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:26:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:26:36,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:26:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 313 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2018-07-24 12:26:36,997 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:26:37,220 WARN L169 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2018-07-24 12:26:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 162 proven. 109 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-07-24 12:26:37,442 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:26:37,442 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:26:37,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:26:37,462 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:26:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:26:37,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:26:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 241 proven. 2 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-07-24 12:26:38,158 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:26:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 92 proven. 175 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-07-24 12:26:38,626 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:26:38,627 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 5, 5] total 20 [2018-07-24 12:26:38,627 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:26:38,628 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-24 12:26:38,628 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-24 12:26:38,628 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2018-07-24 12:26:38,628 INFO L87 Difference]: Start difference. First operand 42605 states and 51224 transitions. Second operand 15 states. [2018-07-24 12:26:56,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:26:56,020 INFO L93 Difference]: Finished difference Result 123700 states and 150093 transitions. [2018-07-24 12:26:56,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-24 12:26:56,020 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 349 [2018-07-24 12:26:56,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:26:56,242 INFO L225 Difference]: With dead ends: 123700 [2018-07-24 12:26:56,242 INFO L226 Difference]: Without dead ends: 73976 [2018-07-24 12:26:56,363 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1451 GetRequests, 1399 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=523, Invalid=1547, Unknown=0, NotChecked=0, Total=2070 [2018-07-24 12:26:56,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73976 states. [2018-07-24 12:26:57,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73976 to 68324. [2018-07-24 12:26:57,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68324 states. [2018-07-24 12:26:57,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68324 states to 68324 states and 79165 transitions. [2018-07-24 12:26:57,858 INFO L78 Accepts]: Start accepts. Automaton has 68324 states and 79165 transitions. Word has length 349 [2018-07-24 12:26:57,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:26:57,858 INFO L471 AbstractCegarLoop]: Abstraction has 68324 states and 79165 transitions. [2018-07-24 12:26:57,859 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-24 12:26:57,859 INFO L276 IsEmpty]: Start isEmpty. Operand 68324 states and 79165 transitions. [2018-07-24 12:26:57,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-07-24 12:26:57,866 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:26:57,866 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:26:57,866 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:26:57,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1839700776, now seen corresponding path program 1 times [2018-07-24 12:26:57,867 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:26:57,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:26:57,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:26:57,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:26:57,868 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:26:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:26:58,381 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-07-24 12:26:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 90 proven. 192 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-07-24 12:26:58,742 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:26:58,742 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:26:58,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:26:58,759 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:26:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:26:58,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:27:02,854 WARN L169 SmtUtils]: Spent 1.57 s on a formula simplification that was a NOOP. DAG size: 38 [2018-07-24 12:27:05,195 WARN L169 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2018-07-24 12:27:05,391 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 94 proven. 117 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2018-07-24 12:27:05,391 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:27:08,172 WARN L169 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2018-07-24 12:27:08,174 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,244 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,247 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,249 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,252 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,254 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,257 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,259 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,262 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,264 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,266 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,270 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,272 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,275 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,278 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,280 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,283 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,285 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,288 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,290 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,293 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,295 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,298 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,300 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,302 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,305 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,307 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,311 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,314 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,316 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,318 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,321 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,323 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,326 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,328 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,330 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,333 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,336 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,338 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,340 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,343 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,345 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,347 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,350 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,352 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,354 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,357 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,359 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,362 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,364 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,367 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,370 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,372 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,374 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,377 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,379 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,382 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,384 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,387 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,389 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,392 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,394 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,397 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,399 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,402 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,404 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,406 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,409 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,411 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,414 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,416 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,419 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,421 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,423 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,426 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,428 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,431 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,433 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,436 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,438 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,440 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,443 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,445 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,447 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,450 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,452 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,454 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,457 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,459 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,462 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,464 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,467 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,469 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,472 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,474 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,477 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,479 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,481 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,484 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,486 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 12:27:08,995 WARN L169 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2018-07-24 12:27:09,236 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2018-07-24 12:27:10,560 WARN L169 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2018-07-24 12:27:10,564 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:10,804 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:10,814 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:10,825 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:10,837 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:10,849 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:10,860 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:10,871 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:10,884 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:10,896 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:10,908 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:10,920 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:10,932 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:10,943 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:10,959 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:10,971 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:10,985 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:10,997 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,009 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,020 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,032 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,044 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,056 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,069 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,081 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,093 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,105 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,116 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,129 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,140 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,153 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,166 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,180 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,193 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,207 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,221 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,234 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,247 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,261 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,275 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,288 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,300 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,313 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,327 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,339 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,352 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,713 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,725 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,737 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,749 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,762 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,773 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:11,787 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,649 WARN L169 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2018-07-24 12:27:13,654 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,661 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,671 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,681 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,691 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,701 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,712 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,723 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,734 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,745 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,756 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,767 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,778 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,788 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,799 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,809 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,819 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,829 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,838 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,848 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,858 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,868 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,878 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,888 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,897 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,907 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:13,917 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 12:27:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 99 proven. 269 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:27:15,127 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:27:15,127 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:27:15,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:27:15,143 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:27:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:27:15,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:27:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 252 proven. 87 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2018-07-24 12:27:15,745 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:27:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 175 proven. 107 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-07-24 12:27:16,042 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:27:16,042 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 14, 8, 5] total 31 [2018-07-24 12:27:16,043 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:27:16,044 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-24 12:27:16,044 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-24 12:27:16,044 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=760, Unknown=2, NotChecked=0, Total=930 [2018-07-24 12:27:16,044 INFO L87 Difference]: Start difference. First operand 68324 states and 79165 transitions. Second operand 15 states. [2018-07-24 12:27:35,714 WARN L169 SmtUtils]: Spent 12.16 s on a formula simplification. DAG size of input: 86 DAG size of output: 72 Received shutdown request... [2018-07-24 12:27:45,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:27:45,896 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:27:45,901 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:27:45,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:27:45 BoogieIcfgContainer [2018-07-24 12:27:45,901 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:27:45,902 INFO L168 Benchmark]: Toolchain (without parser) took 242355.01 ms. Allocated memory was 1.5 GB in the beginning and 3.7 GB in the end (delta: 2.2 GB). Free memory was 1.4 GB in the beginning and 3.3 GB in the end (delta: -1.9 GB). Peak memory consumption was 335.1 MB. Max. memory is 7.1 GB. [2018-07-24 12:27:45,903 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 12:27:45,904 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1742.17 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 179.7 MB). Peak memory consumption was 179.7 MB. Max. memory is 7.1 GB. [2018-07-24 12:27:45,905 INFO L168 Benchmark]: Boogie Procedure Inliner took 286.71 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 53.4 MB). Peak memory consumption was 53.4 MB. Max. memory is 7.1 GB. [2018-07-24 12:27:45,905 INFO L168 Benchmark]: Boogie Preprocessor took 836.25 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 928.0 MB). Free memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 123.7 MB. Max. memory is 7.1 GB. [2018-07-24 12:27:45,906 INFO L168 Benchmark]: RCFGBuilder took 11728.80 ms. Allocated memory is still 2.5 GB. Free memory was 2.3 GB in the beginning and 1.8 GB in the end (delta: 501.5 MB). Peak memory consumption was 501.5 MB. Max. memory is 7.1 GB. [2018-07-24 12:27:45,907 INFO L168 Benchmark]: TraceAbstraction took 227756.50 ms. Allocated memory was 2.5 GB in the beginning and 3.7 GB in the end (delta: 1.3 GB). Free memory was 1.8 GB in the beginning and 3.3 GB in the end (delta: -1.5 GB). There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 12:27:45,911 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 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 1742.17 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 179.7 MB). Peak memory consumption was 179.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 286.71 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 53.4 MB). Peak memory consumption was 53.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 836.25 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 928.0 MB). Free memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 123.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 11728.80 ms. Allocated memory is still 2.5 GB. Free memory was 2.3 GB in the beginning and 1.8 GB in the end (delta: 501.5 MB). Peak memory consumption was 501.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 227756.50 ms. Allocated memory was 2.5 GB in the beginning and 3.7 GB in the end (delta: 1.3 GB). Free memory was 1.8 GB in the beginning and 3.3 GB in the end (delta: -1.5 GB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 92). Cancelled while BasicCegarLoop was constructing difference of abstraction (68324states) and interpolant automaton (currently 8 states, 15 states before enhancement), while ReachableStatesComputation was computing reachable states (169 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 227.6s OverallTime, 10 OverallIterations, 4 TraceHistogramMax, 180.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2915 SDtfs, 28460 SDslu, 3768 SDs, 0 SdLazy, 42159 SolverSat, 10805 SolverUnsat, 16 SolverUnknown, 0 SolverNotchecked, 148.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5768 GetRequests, 5563 SyntacticMatches, 33 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 43.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68324occurred in iteration=9, 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: 4.6s AutomataMinimizationTime, 9 MinimizatonAttempts, 19704 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 38.0s InterpolantComputationTime, 4849 NumberOfCodeBlocks, 4849 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 7622 ConstructedInterpolants, 523 QuantifiedInterpolants, 20840928 SizeOfPredicates, 28 NumberOfNonLiveVariables, 5033 ConjunctsInSsa, 115 ConjunctsInUnsatCore, 32 InterpolantComputations, 8 PerfectInterpolantSequences, 3898/5657 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/Problem17_label26_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-27-45-931.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem17_label26_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-27-45-931.csv Completed graceful shutdown