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/Problem16_label41_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:19:46,513 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:19:46,515 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:19:46,527 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:19:46,527 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:19:46,528 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:19:46,530 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:19:46,531 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:19:46,533 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:19:46,534 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:19:46,535 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:19:46,535 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:19:46,536 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:19:46,537 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:19:46,539 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:19:46,540 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:19:46,541 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:19:46,545 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:19:46,549 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:19:46,550 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:19:46,551 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:19:46,556 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:19:46,558 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:19:46,558 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:19:46,560 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:19:46,561 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:19:46,562 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:19:46,562 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:19:46,563 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:19:46,567 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:19:46,567 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:19:46,567 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 12:19:46,568 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:19:46,568 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:19:46,570 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:19:46,571 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:19:46,571 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 12:19:46,597 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:19:46,598 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:19:46,598 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:19:46,599 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:19:46,599 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:19:46,599 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:19:46,599 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:19:46,600 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:19:46,600 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:19:46,600 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:19:46,600 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:19:46,601 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:19:46,602 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:19:46,602 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:19:46,602 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:19:46,603 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:19:46,603 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:19:46,603 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:19:46,603 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:19:46,605 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:19:46,605 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:19:46,605 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:19:46,605 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:19:46,605 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:19:46,606 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:19:46,606 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:19:46,606 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:19:46,606 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:19:46,606 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:19:46,607 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:19:46,607 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:19:46,607 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:19:46,607 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:19:46,656 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:19:46,671 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:19:46,677 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:19:46,679 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:19:46,679 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:19:46,681 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label41_false-unreach-call.c [2018-07-24 12:19:47,024 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3caf7824/b5ac37fad5c04b828cded6445c8d88f2/FLAGed364426b [2018-07-24 12:19:47,427 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:19:47,428 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label41_false-unreach-call.c [2018-07-24 12:19:47,453 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3caf7824/b5ac37fad5c04b828cded6445c8d88f2/FLAGed364426b [2018-07-24 12:19:47,477 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3caf7824/b5ac37fad5c04b828cded6445c8d88f2 [2018-07-24 12:19:47,491 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:19:47,495 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:19:47,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:19:47,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:19:47,503 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:19:47,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:19:47" (1/1) ... [2018-07-24 12:19:47,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37282a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:19:47, skipping insertion in model container [2018-07-24 12:19:47,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:19:47" (1/1) ... [2018-07-24 12:19:47,810 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:19:48,337 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:19:48,354 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:19:48,593 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:19:48,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:19:48 WrapperNode [2018-07-24 12:19:48,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:19:48,685 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:19:48,685 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:19:48,685 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:19:48,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:19:48" (1/1) ... [2018-07-24 12:19:48,740 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:19:48" (1/1) ... [2018-07-24 12:19:48,861 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:19:48,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:19:48,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:19:48,862 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:19:49,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:19:48" (1/1) ... [2018-07-24 12:19:49,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:19:48" (1/1) ... [2018-07-24 12:19:49,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:19:48" (1/1) ... [2018-07-24 12:19:49,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:19:48" (1/1) ... [2018-07-24 12:19:49,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:19:48" (1/1) ... [2018-07-24 12:19:49,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:19:48" (1/1) ... [2018-07-24 12:19:49,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:19:48" (1/1) ... [2018-07-24 12:19:49,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:19:49,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:19:49,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:19:49,344 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:19:49,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:19:48" (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 12:19:49,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:19:49,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:19:49,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:19:49,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:19:49,407 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:19:49,407 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:19:49,407 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 12:19:49,408 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 12:19:49,408 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 12:19:49,408 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 12:19:55,267 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:19:55,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:19:55 BoogieIcfgContainer [2018-07-24 12:19:55,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:19:55,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:19:55,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:19:55,273 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:19:55,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:19:47" (1/3) ... [2018-07-24 12:19:55,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@994a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:19:55, skipping insertion in model container [2018-07-24 12:19:55,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:19:48" (2/3) ... [2018-07-24 12:19:55,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@994a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:19:55, skipping insertion in model container [2018-07-24 12:19:55,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:19:55" (3/3) ... [2018-07-24 12:19:55,277 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label41_false-unreach-call.c [2018-07-24 12:19:55,287 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:19:55,296 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:19:55,351 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:19:55,352 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:19:55,352 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:19:55,352 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:19:55,352 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:19:55,353 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:19:55,353 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:19:55,353 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:19:55,353 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:19:55,383 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-07-24 12:19:55,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-07-24 12:19:55,391 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:19:55,392 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] [2018-07-24 12:19:55,392 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 12:19:55,401 INFO L82 PathProgramCache]: Analyzing trace with hash -621346556, now seen corresponding path program 1 times [2018-07-24 12:19:55,404 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:19:55,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:55,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:55,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:55,454 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:19:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:55,845 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 12:19:55,847 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:19:55,847 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 12:19:55,848 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:19:55,853 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:19:55,869 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:19:55,870 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:19:55,873 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 4 states. [2018-07-24 12:20:02,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:20:02,119 INFO L93 Difference]: Finished difference Result 1513 states and 2838 transitions. [2018-07-24 12:20:02,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:20:02,121 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2018-07-24 12:20:02,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:20:02,153 INFO L225 Difference]: With dead ends: 1513 [2018-07-24 12:20:02,153 INFO L226 Difference]: Without dead ends: 1097 [2018-07-24 12:20:02,167 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 12:20:02,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2018-07-24 12:20:02,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 744. [2018-07-24 12:20:02,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-07-24 12:20:02,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1301 transitions. [2018-07-24 12:20:02,310 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1301 transitions. Word has length 30 [2018-07-24 12:20:02,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:20:02,310 INFO L471 AbstractCegarLoop]: Abstraction has 744 states and 1301 transitions. [2018-07-24 12:20:02,311 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:20:02,311 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1301 transitions. [2018-07-24 12:20:02,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-07-24 12:20:02,318 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:20:02,320 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:20:02,320 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 12:20:02,320 INFO L82 PathProgramCache]: Analyzing trace with hash 648871363, now seen corresponding path program 1 times [2018-07-24 12:20:02,321 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:20:02,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:02,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:02,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:02,323 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:20:02,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:20:02,599 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:20:02,599 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:20:02,600 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:20:02,602 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:20:02,602 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:20:02,602 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:20:02,603 INFO L87 Difference]: Start difference. First operand 744 states and 1301 transitions. Second operand 6 states. [2018-07-24 12:20:07,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:20:07,381 INFO L93 Difference]: Finished difference Result 2196 states and 3924 transitions. [2018-07-24 12:20:07,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:20:07,387 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2018-07-24 12:20:07,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:20:07,400 INFO L225 Difference]: With dead ends: 2196 [2018-07-24 12:20:07,400 INFO L226 Difference]: Without dead ends: 1458 [2018-07-24 12:20:07,404 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:20:07,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2018-07-24 12:20:07,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1438. [2018-07-24 12:20:07,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1438 states. [2018-07-24 12:20:07,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 2463 transitions. [2018-07-24 12:20:07,465 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 2463 transitions. Word has length 101 [2018-07-24 12:20:07,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:20:07,466 INFO L471 AbstractCegarLoop]: Abstraction has 1438 states and 2463 transitions. [2018-07-24 12:20:07,466 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:20:07,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 2463 transitions. [2018-07-24 12:20:07,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-07-24 12:20:07,470 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:20:07,470 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:20:07,470 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 12:20:07,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1371549938, now seen corresponding path program 1 times [2018-07-24 12:20:07,471 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:20:07,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:07,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:07,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:07,472 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:20:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:07,663 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:20:07,664 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:20:07,664 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:20:07,664 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:20:07,665 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:20:07,665 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:20:07,665 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:20:07,665 INFO L87 Difference]: Start difference. First operand 1438 states and 2463 transitions. Second operand 6 states. [2018-07-24 12:20:17,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:20:17,665 INFO L93 Difference]: Finished difference Result 4243 states and 7300 transitions. [2018-07-24 12:20:17,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:20:17,667 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2018-07-24 12:20:17,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:20:17,683 INFO L225 Difference]: With dead ends: 4243 [2018-07-24 12:20:17,684 INFO L226 Difference]: Without dead ends: 2811 [2018-07-24 12:20:17,693 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:20:17,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2018-07-24 12:20:17,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 2793. [2018-07-24 12:20:17,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2793 states. [2018-07-24 12:20:17,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 4205 transitions. [2018-07-24 12:20:17,787 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 4205 transitions. Word has length 102 [2018-07-24 12:20:17,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:20:17,787 INFO L471 AbstractCegarLoop]: Abstraction has 2793 states and 4205 transitions. [2018-07-24 12:20:17,787 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:20:17,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 4205 transitions. [2018-07-24 12:20:17,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-07-24 12:20:17,797 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:20:17,797 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:20:17,798 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 12:20:17,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1819624630, now seen corresponding path program 1 times [2018-07-24 12:20:17,798 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:20:17,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:17,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:17,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:17,802 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:20:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:18,025 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:20:18,025 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:20:18,025 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:20:18,026 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:20:18,026 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:20:18,026 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:20:18,026 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:20:18,027 INFO L87 Difference]: Start difference. First operand 2793 states and 4205 transitions. Second operand 6 states. [2018-07-24 12:20:21,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:20:21,619 INFO L93 Difference]: Finished difference Result 7008 states and 10834 transitions. [2018-07-24 12:20:21,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:20:21,619 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2018-07-24 12:20:21,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:20:21,646 INFO L225 Difference]: With dead ends: 7008 [2018-07-24 12:20:21,646 INFO L226 Difference]: Without dead ends: 4221 [2018-07-24 12:20:21,658 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:20:21,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2018-07-24 12:20:21,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 4201. [2018-07-24 12:20:21,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4201 states. [2018-07-24 12:20:21,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4201 states to 4201 states and 5739 transitions. [2018-07-24 12:20:21,768 INFO L78 Accepts]: Start accepts. Automaton has 4201 states and 5739 transitions. Word has length 114 [2018-07-24 12:20:21,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:20:21,768 INFO L471 AbstractCegarLoop]: Abstraction has 4201 states and 5739 transitions. [2018-07-24 12:20:21,768 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:20:21,769 INFO L276 IsEmpty]: Start isEmpty. Operand 4201 states and 5739 transitions. [2018-07-24 12:20:21,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-07-24 12:20:21,771 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:20:21,771 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:20:21,772 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 12:20:21,772 INFO L82 PathProgramCache]: Analyzing trace with hash 823006486, now seen corresponding path program 1 times [2018-07-24 12:20:21,772 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:20:21,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:21,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:21,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:21,773 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:20:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:22,042 WARN L169 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:20:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:20:22,508 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:20:22,509 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:20:22,509 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:20:22,510 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:20:22,510 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:20:22,510 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:20:22,511 INFO L87 Difference]: Start difference. First operand 4201 states and 5739 transitions. Second operand 6 states. [2018-07-24 12:20:27,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:20:27,637 INFO L93 Difference]: Finished difference Result 13169 states and 18387 transitions. [2018-07-24 12:20:27,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:20:27,642 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 194 [2018-07-24 12:20:27,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:20:27,681 INFO L225 Difference]: With dead ends: 13169 [2018-07-24 12:20:27,681 INFO L226 Difference]: Without dead ends: 8974 [2018-07-24 12:20:27,715 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:20:27,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8974 states. [2018-07-24 12:20:27,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8974 to 8932. [2018-07-24 12:20:27,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8932 states. [2018-07-24 12:20:27,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8932 states to 8932 states and 12028 transitions. [2018-07-24 12:20:27,942 INFO L78 Accepts]: Start accepts. Automaton has 8932 states and 12028 transitions. Word has length 194 [2018-07-24 12:20:27,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:20:27,943 INFO L471 AbstractCegarLoop]: Abstraction has 8932 states and 12028 transitions. [2018-07-24 12:20:27,943 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:20:27,945 INFO L276 IsEmpty]: Start isEmpty. Operand 8932 states and 12028 transitions. [2018-07-24 12:20:27,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-07-24 12:20:27,947 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:20:27,948 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:20:27,948 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 12:20:27,948 INFO L82 PathProgramCache]: Analyzing trace with hash -758851282, now seen corresponding path program 1 times [2018-07-24 12:20:27,948 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:20:27,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:27,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:27,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:27,952 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:20:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:28,260 WARN L169 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:20:28,617 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:20:28,617 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:20:28,618 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:20:28,618 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:20:28,618 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:20:28,618 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:20:28,618 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:20:28,619 INFO L87 Difference]: Start difference. First operand 8932 states and 12028 transitions. Second operand 6 states. [2018-07-24 12:20:34,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:20:34,612 INFO L93 Difference]: Finished difference Result 22282 states and 30451 transitions. [2018-07-24 12:20:34,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:20:34,613 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 214 [2018-07-24 12:20:34,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:20:34,671 INFO L225 Difference]: With dead ends: 22282 [2018-07-24 12:20:34,671 INFO L226 Difference]: Without dead ends: 13356 [2018-07-24 12:20:34,714 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 12:20:34,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13356 states. [2018-07-24 12:20:34,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13356 to 13319. [2018-07-24 12:20:34,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13319 states. [2018-07-24 12:20:35,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13319 states to 13319 states and 17317 transitions. [2018-07-24 12:20:35,006 INFO L78 Accepts]: Start accepts. Automaton has 13319 states and 17317 transitions. Word has length 214 [2018-07-24 12:20:35,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:20:35,006 INFO L471 AbstractCegarLoop]: Abstraction has 13319 states and 17317 transitions. [2018-07-24 12:20:35,006 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:20:35,007 INFO L276 IsEmpty]: Start isEmpty. Operand 13319 states and 17317 transitions. [2018-07-24 12:20:35,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-07-24 12:20:35,010 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:20:35,011 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 12:20:35,011 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 12:20:35,011 INFO L82 PathProgramCache]: Analyzing trace with hash -250146227, now seen corresponding path program 1 times [2018-07-24 12:20:35,011 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:20:35,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:35,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:35,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:35,013 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:20:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:35,262 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-07-24 12:20:35,263 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:20:35,263 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 12:20:35,263 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:20:35,264 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:20:35,264 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:20:35,264 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:20:35,268 INFO L87 Difference]: Start difference. First operand 13319 states and 17317 transitions. Second operand 4 states. [2018-07-24 12:20:43,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:20:43,850 INFO L93 Difference]: Finished difference Result 34007 states and 44462 transitions. [2018-07-24 12:20:43,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:20:43,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 231 [2018-07-24 12:20:43,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:20:43,927 INFO L225 Difference]: With dead ends: 34007 [2018-07-24 12:20:43,928 INFO L226 Difference]: Without dead ends: 20694 [2018-07-24 12:20:43,973 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:20:43,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20694 states. [2018-07-24 12:20:44,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20694 to 20691. [2018-07-24 12:20:44,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20691 states. [2018-07-24 12:20:44,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20691 states to 20691 states and 25281 transitions. [2018-07-24 12:20:44,388 INFO L78 Accepts]: Start accepts. Automaton has 20691 states and 25281 transitions. Word has length 231 [2018-07-24 12:20:44,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:20:44,389 INFO L471 AbstractCegarLoop]: Abstraction has 20691 states and 25281 transitions. [2018-07-24 12:20:44,389 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:20:44,389 INFO L276 IsEmpty]: Start isEmpty. Operand 20691 states and 25281 transitions. [2018-07-24 12:20:44,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-07-24 12:20:44,398 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:20:44,398 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:20:44,398 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 12:20:44,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1801997486, now seen corresponding path program 1 times [2018-07-24 12:20:44,399 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:20:44,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:44,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:44,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:44,400 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:20:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:44,735 WARN L169 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:20:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-24 12:20:45,020 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:20:45,021 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 12:20:45,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:45,038 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:20:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:45,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:20:45,631 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:20:45,631 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:20:46,045 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:20:46,084 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:20:46,084 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2018-07-24 12:20:46,084 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:20:46,085 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:20:46,085 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:20:46,086 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-07-24 12:20:46,086 INFO L87 Difference]: Start difference. First operand 20691 states and 25281 transitions. Second operand 3 states. [2018-07-24 12:20:50,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:20:50,614 INFO L93 Difference]: Finished difference Result 44418 states and 54318 transitions. [2018-07-24 12:20:50,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:20:50,615 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 278 [2018-07-24 12:20:50,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:20:50,712 INFO L225 Difference]: With dead ends: 44418 [2018-07-24 12:20:50,712 INFO L226 Difference]: Without dead ends: 23733 [2018-07-24 12:20:50,848 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 554 SyntacticMatches, 5 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-07-24 12:20:50,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23733 states. [2018-07-24 12:20:51,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23733 to 23733. [2018-07-24 12:20:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23733 states. [2018-07-24 12:20:51,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23733 states to 23733 states and 28548 transitions. [2018-07-24 12:20:51,440 INFO L78 Accepts]: Start accepts. Automaton has 23733 states and 28548 transitions. Word has length 278 [2018-07-24 12:20:51,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:20:51,440 INFO L471 AbstractCegarLoop]: Abstraction has 23733 states and 28548 transitions. [2018-07-24 12:20:51,440 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:20:51,441 INFO L276 IsEmpty]: Start isEmpty. Operand 23733 states and 28548 transitions. [2018-07-24 12:20:51,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2018-07-24 12:20:51,463 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:20:51,464 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:20:51,464 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 12:20:51,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1339531160, now seen corresponding path program 1 times [2018-07-24 12:20:51,464 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:20:51,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:51,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:51,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:51,466 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:20:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-07-24 12:20:51,893 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:20:51,893 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 12:20:51,893 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:20:51,894 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:20:51,894 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:20:51,894 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:20:51,895 INFO L87 Difference]: Start difference. First operand 23733 states and 28548 transitions. Second operand 4 states. [2018-07-24 12:21:00,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:21:00,585 INFO L93 Difference]: Finished difference Result 53803 states and 65355 transitions. [2018-07-24 12:21:00,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:21:00,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 454 [2018-07-24 12:21:00,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:21:00,687 INFO L225 Difference]: With dead ends: 53803 [2018-07-24 12:21:00,688 INFO L226 Difference]: Without dead ends: 30076 [2018-07-24 12:21:00,763 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:21:00,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30076 states. [2018-07-24 12:21:01,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30076 to 30071. [2018-07-24 12:21:01,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30071 states. [2018-07-24 12:21:01,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30071 states to 30071 states and 34961 transitions. [2018-07-24 12:21:01,222 INFO L78 Accepts]: Start accepts. Automaton has 30071 states and 34961 transitions. Word has length 454 [2018-07-24 12:21:01,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:21:01,224 INFO L471 AbstractCegarLoop]: Abstraction has 30071 states and 34961 transitions. [2018-07-24 12:21:01,224 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:21:01,224 INFO L276 IsEmpty]: Start isEmpty. Operand 30071 states and 34961 transitions. [2018-07-24 12:21:01,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2018-07-24 12:21:01,262 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:21:01,263 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:21:01,263 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 12:21:01,264 INFO L82 PathProgramCache]: Analyzing trace with hash 976794320, now seen corresponding path program 1 times [2018-07-24 12:21:01,264 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:21:01,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:01,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:01,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:01,265 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:21:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 709 backedges. 216 proven. 200 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2018-07-24 12:21:01,721 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:21:01,721 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 12:21:01,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:01,732 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:21:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:01,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:21:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 709 backedges. 566 proven. 2 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2018-07-24 12:21:02,121 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:21:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 709 backedges. 216 proven. 200 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2018-07-24 12:21:02,768 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:21:02,768 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 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:21:02,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:02,788 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:21:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:03,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:21:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 709 backedges. 566 proven. 2 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2018-07-24 12:21:03,263 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:21:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 709 backedges. 216 proven. 200 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2018-07-24 12:21:03,561 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:21:03,562 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-07-24 12:21:03,562 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:21:03,563 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:21:03,563 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:21:03,563 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:21:03,563 INFO L87 Difference]: Start difference. First operand 30071 states and 34961 transitions. Second operand 9 states. [2018-07-24 12:21:14,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:21:14,899 INFO L93 Difference]: Finished difference Result 63063 states and 75337 transitions. [2018-07-24 12:21:14,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-24 12:21:14,899 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 480 [2018-07-24 12:21:14,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:21:15,002 INFO L225 Difference]: With dead ends: 63063 [2018-07-24 12:21:15,002 INFO L226 Difference]: Without dead ends: 29755 [2018-07-24 12:21:15,130 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1940 GetRequests, 1919 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2018-07-24 12:21:15,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29755 states. [2018-07-24 12:21:15,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29755 to 29333. [2018-07-24 12:21:15,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29333 states. [2018-07-24 12:21:15,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29333 states to 29333 states and 32059 transitions. [2018-07-24 12:21:15,632 INFO L78 Accepts]: Start accepts. Automaton has 29333 states and 32059 transitions. Word has length 480 [2018-07-24 12:21:15,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:21:15,633 INFO L471 AbstractCegarLoop]: Abstraction has 29333 states and 32059 transitions. [2018-07-24 12:21:15,633 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:21:15,633 INFO L276 IsEmpty]: Start isEmpty. Operand 29333 states and 32059 transitions. [2018-07-24 12:21:15,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1099 [2018-07-24 12:21:15,721 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:21:15,722 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 12:21:15,722 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:21:15,723 INFO L82 PathProgramCache]: Analyzing trace with hash 414843254, now seen corresponding path program 1 times [2018-07-24 12:21:15,723 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:21:15,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:15,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:15,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:15,724 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:21:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:16,761 WARN L169 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-07-24 12:21:17,136 WARN L169 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2018-07-24 12:21:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 582 proven. 344 refuted. 0 times theorem prover too weak. 904 trivial. 0 not checked. [2018-07-24 12:21:20,410 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:21:20,410 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:21:20,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:20,418 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:21:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:20,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:21:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 494 proven. 2 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2018-07-24 12:21:21,549 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:21:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 494 proven. 2 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2018-07-24 12:21:22,308 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:21:22,308 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:21:22,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:22,327 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:21:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:23,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:21:23,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 494 proven. 2 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2018-07-24 12:21:23,570 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:21:24,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 494 proven. 2 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2018-07-24 12:21:24,505 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:21:24,506 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5, 5, 5] total 20 [2018-07-24 12:21:24,506 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:21:24,508 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 12:21:24,508 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 12:21:24,508 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2018-07-24 12:21:24,509 INFO L87 Difference]: Start difference. First operand 29333 states and 32059 transitions. Second operand 14 states. [2018-07-24 12:21:24,700 WARN L169 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2018-07-24 12:21:27,639 WARN L169 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2018-07-24 12:21:28,825 WARN L169 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2018-07-24 12:21:33,167 WARN L169 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2018-07-24 12:21:33,522 WARN L169 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2018-07-24 12:21:39,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:21:39,271 INFO L93 Difference]: Finished difference Result 57877 states and 62704 transitions. [2018-07-24 12:21:39,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-24 12:21:39,272 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1098 [2018-07-24 12:21:39,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:21:39,340 INFO L225 Difference]: With dead ends: 57877 [2018-07-24 12:21:39,341 INFO L226 Difference]: Without dead ends: 28550 [2018-07-24 12:21:39,423 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4464 GetRequests, 4411 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=641, Invalid=2115, Unknown=0, NotChecked=0, Total=2756 [2018-07-24 12:21:39,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28550 states. [2018-07-24 12:21:39,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28550 to 27986. [2018-07-24 12:21:39,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27986 states. [2018-07-24 12:21:39,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27986 states to 27986 states and 29630 transitions. [2018-07-24 12:21:39,847 INFO L78 Accepts]: Start accepts. Automaton has 27986 states and 29630 transitions. Word has length 1098 [2018-07-24 12:21:39,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:21:39,849 INFO L471 AbstractCegarLoop]: Abstraction has 27986 states and 29630 transitions. [2018-07-24 12:21:39,849 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-24 12:21:39,849 INFO L276 IsEmpty]: Start isEmpty. Operand 27986 states and 29630 transitions. [2018-07-24 12:21:39,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1344 [2018-07-24 12:21:39,962 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:21:39,963 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:21:39,963 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:21:39,964 INFO L82 PathProgramCache]: Analyzing trace with hash -38564803, now seen corresponding path program 1 times [2018-07-24 12:21:39,964 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:21:39,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:39,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:39,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:39,965 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:21:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:41,338 WARN L169 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2018-07-24 12:21:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3507 backedges. 1421 proven. 1046 refuted. 0 times theorem prover too weak. 1040 trivial. 0 not checked. [2018-07-24 12:21:44,519 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:21:44,519 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:21:44,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:44,531 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:21:44,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:44,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:21:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3507 backedges. 1073 proven. 0 refuted. 0 times theorem prover too weak. 2434 trivial. 0 not checked. [2018-07-24 12:21:45,847 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:21:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3507 backedges. 184 proven. 1022 refuted. 0 times theorem prover too weak. 2301 trivial. 0 not checked. [2018-07-24 12:21:47,876 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:21:47,877 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [15, 5] total 20 [2018-07-24 12:21:47,877 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:21:47,879 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:21:47,879 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:21:47,879 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2018-07-24 12:21:47,880 INFO L87 Difference]: Start difference. First operand 27986 states and 29630 transitions. Second operand 5 states. [2018-07-24 12:21:52,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:21:52,001 INFO L93 Difference]: Finished difference Result 60238 states and 63853 transitions. [2018-07-24 12:21:52,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:21:52,002 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1343 [2018-07-24 12:21:52,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:21:52,070 INFO L225 Difference]: With dead ends: 60238 [2018-07-24 12:21:52,070 INFO L226 Difference]: Without dead ends: 32263 [2018-07-24 12:21:52,116 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2705 GetRequests, 2685 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2018-07-24 12:21:52,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32263 states. [2018-07-24 12:21:52,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32263 to 29173. [2018-07-24 12:21:52,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29173 states. [2018-07-24 12:21:52,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29173 states to 29173 states and 30835 transitions. [2018-07-24 12:21:52,544 INFO L78 Accepts]: Start accepts. Automaton has 29173 states and 30835 transitions. Word has length 1343 [2018-07-24 12:21:52,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:21:52,544 INFO L471 AbstractCegarLoop]: Abstraction has 29173 states and 30835 transitions. [2018-07-24 12:21:52,545 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:21:52,545 INFO L276 IsEmpty]: Start isEmpty. Operand 29173 states and 30835 transitions. [2018-07-24 12:21:52,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1387 [2018-07-24 12:21:52,594 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:21:52,595 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:21:52,595 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:21:52,596 INFO L82 PathProgramCache]: Analyzing trace with hash 833000038, now seen corresponding path program 1 times [2018-07-24 12:21:52,596 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:21:52,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:52,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:52,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:52,597 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:21:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:54,290 WARN L169 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-07-24 12:21:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4264 backedges. 1654 proven. 1046 refuted. 0 times theorem prover too weak. 1564 trivial. 0 not checked. [2018-07-24 12:21:58,024 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:21:58,024 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 12:21:58,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:58,033 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:21:58,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:58,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:22:00,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4264 backedges. 1025 proven. 0 refuted. 0 times theorem prover too weak. 3239 trivial. 0 not checked. [2018-07-24 12:22:00,460 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:22:01,297 WARN L169 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-07-24 12:22:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4264 backedges. 207 proven. 970 refuted. 0 times theorem prover too weak. 3087 trivial. 0 not checked. [2018-07-24 12:22:03,224 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:22:03,225 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [15, 6] total 21 [2018-07-24 12:22:03,225 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:22:03,226 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:22:03,226 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:22:03,227 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2018-07-24 12:22:03,227 INFO L87 Difference]: Start difference. First operand 29173 states and 30835 transitions. Second operand 6 states. [2018-07-24 12:22:07,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:22:07,152 INFO L93 Difference]: Finished difference Result 58038 states and 61347 transitions. [2018-07-24 12:22:07,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-24 12:22:07,153 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1386 [2018-07-24 12:22:07,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:22:07,212 INFO L225 Difference]: With dead ends: 58038 [2018-07-24 12:22:07,212 INFO L226 Difference]: Without dead ends: 29549 [2018-07-24 12:22:07,257 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2793 GetRequests, 2770 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2018-07-24 12:22:07,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29549 states. [2018-07-24 12:22:07,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29549 to 29175. [2018-07-24 12:22:07,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29175 states. [2018-07-24 12:22:07,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29175 states to 29175 states and 30831 transitions. [2018-07-24 12:22:07,665 INFO L78 Accepts]: Start accepts. Automaton has 29175 states and 30831 transitions. Word has length 1386 [2018-07-24 12:22:07,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:22:07,666 INFO L471 AbstractCegarLoop]: Abstraction has 29175 states and 30831 transitions. [2018-07-24 12:22:07,666 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:22:07,666 INFO L276 IsEmpty]: Start isEmpty. Operand 29175 states and 30831 transitions. [2018-07-24 12:22:07,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1562 [2018-07-24 12:22:07,720 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:22:07,721 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:22:07,722 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:22:07,722 INFO L82 PathProgramCache]: Analyzing trace with hash -697660681, now seen corresponding path program 1 times [2018-07-24 12:22:07,722 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:22:07,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:22:07,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:22:07,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:22:07,724 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:22:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:22:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4743 backedges. 243 proven. 2187 refuted. 0 times theorem prover too weak. 2313 trivial. 0 not checked. [2018-07-24 12:22:09,640 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:22:09,640 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 12:22:09,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:22:09,650 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:22:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:22:10,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:22:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4743 backedges. 2307 proven. 2 refuted. 0 times theorem prover too weak. 2434 trivial. 0 not checked. [2018-07-24 12:22:11,588 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:22:12,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4743 backedges. 460 proven. 978 refuted. 0 times theorem prover too weak. 3305 trivial. 0 not checked. [2018-07-24 12:22:12,770 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:22:12,770 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 12:22:12,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:22:12,786 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:22:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:22:13,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:22:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4743 backedges. 2090 proven. 2 refuted. 0 times theorem prover too weak. 2651 trivial. 0 not checked. [2018-07-24 12:22:15,109 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:22:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4743 backedges. 245 proven. 1980 refuted. 0 times theorem prover too weak. 2518 trivial. 0 not checked. [2018-07-24 12:22:16,850 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:22:16,852 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-07-24 12:22:16,852 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:22:16,853 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:22:16,854 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:22:16,854 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:22:16,854 INFO L87 Difference]: Start difference. First operand 29175 states and 30831 transitions. Second operand 9 states. [2018-07-24 12:22:22,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:22:22,358 INFO L93 Difference]: Finished difference Result 56258 states and 59547 transitions. [2018-07-24 12:22:22,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-24 12:22:22,359 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1561 [2018-07-24 12:22:22,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:22:22,405 INFO L225 Difference]: With dead ends: 56258 [2018-07-24 12:22:22,406 INFO L226 Difference]: Without dead ends: 27767 [2018-07-24 12:22:22,440 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6273 GetRequests, 6245 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2018-07-24 12:22:22,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27767 states. [2018-07-24 12:22:22,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27767 to 26783. [2018-07-24 12:22:22,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26783 states. [2018-07-24 12:22:22,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26783 states to 26783 states and 27990 transitions. [2018-07-24 12:22:22,702 INFO L78 Accepts]: Start accepts. Automaton has 26783 states and 27990 transitions. Word has length 1561 [2018-07-24 12:22:22,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:22:22,703 INFO L471 AbstractCegarLoop]: Abstraction has 26783 states and 27990 transitions. [2018-07-24 12:22:22,704 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:22:22,704 INFO L276 IsEmpty]: Start isEmpty. Operand 26783 states and 27990 transitions. [2018-07-24 12:22:22,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1650 [2018-07-24 12:22:22,755 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:22:22,756 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:22:22,756 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:22:22,756 INFO L82 PathProgramCache]: Analyzing trace with hash 214614353, now seen corresponding path program 1 times [2018-07-24 12:22:22,757 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:22:22,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:22:22,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:22:22,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:22:22,758 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:22:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:22:24,100 WARN L169 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-07-24 12:22:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4577 backedges. 1082 proven. 507 refuted. 0 times theorem prover too weak. 2988 trivial. 0 not checked. [2018-07-24 12:22:27,668 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:22:27,668 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 12:22:27,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:22:27,676 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:22:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:22:28,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:22:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4577 backedges. 2434 proven. 6 refuted. 0 times theorem prover too weak. 2137 trivial. 0 not checked. [2018-07-24 12:22:29,902 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:22:34,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4577 backedges. 215 proven. 2339 refuted. 0 times theorem prover too weak. 2023 trivial. 0 not checked. [2018-07-24 12:22:34,671 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:22:34,672 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 12:22:34,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:22:34,695 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:22:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:22:35,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:22:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4577 backedges. 2193 proven. 6 refuted. 0 times theorem prover too weak. 2378 trivial. 0 not checked. [2018-07-24 12:22:38,083 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:22:38,306 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2018-07-24 12:22:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4577 backedges. 217 proven. 2337 refuted. 0 times theorem prover too weak. 2023 trivial. 0 not checked. [2018-07-24 12:22:46,274 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:22:46,275 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8, 7, 8] total 31 [2018-07-24 12:22:46,275 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:22:46,277 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-24 12:22:46,277 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-24 12:22:46,278 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2018-07-24 12:22:46,278 INFO L87 Difference]: Start difference. First operand 26783 states and 27990 transitions. Second operand 16 states. [2018-07-24 12:22:54,912 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2018-07-24 12:22:56,291 WARN L169 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-07-24 12:23:00,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:23:00,480 INFO L93 Difference]: Finished difference Result 55854 states and 58382 transitions. [2018-07-24 12:23:00,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-24 12:23:00,480 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 1649 [2018-07-24 12:23:00,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:23:00,670 INFO L225 Difference]: With dead ends: 55854 [2018-07-24 12:23:00,670 INFO L226 Difference]: Without dead ends: 29755 [2018-07-24 12:23:00,693 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6665 GetRequests, 6600 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=693, Invalid=3467, Unknown=0, NotChecked=0, Total=4160 [2018-07-24 12:23:00,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29755 states. [2018-07-24 12:23:00,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29755 to 27138. [2018-07-24 12:23:00,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27138 states. [2018-07-24 12:23:00,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27138 states to 27138 states and 28341 transitions. [2018-07-24 12:23:00,978 INFO L78 Accepts]: Start accepts. Automaton has 27138 states and 28341 transitions. Word has length 1649 [2018-07-24 12:23:00,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:23:00,979 INFO L471 AbstractCegarLoop]: Abstraction has 27138 states and 28341 transitions. [2018-07-24 12:23:00,979 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-24 12:23:00,980 INFO L276 IsEmpty]: Start isEmpty. Operand 27138 states and 28341 transitions. [2018-07-24 12:23:01,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1790 [2018-07-24 12:23:01,027 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:23:01,028 INFO L353 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-07-24 12:23:01,028 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:23:01,029 INFO L82 PathProgramCache]: Analyzing trace with hash 507896697, now seen corresponding path program 1 times [2018-07-24 12:23:01,029 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:23:01,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:23:01,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:23:01,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:23:01,030 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:23:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:23:02,626 WARN L169 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-07-24 12:23:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6161 backedges. 2482 proven. 1249 refuted. 0 times theorem prover too weak. 2430 trivial. 0 not checked. [2018-07-24 12:23:06,747 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:23:06,747 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:23:06,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:23:06,756 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:23:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:23:07,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:23:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6161 backedges. 2557 proven. 2 refuted. 0 times theorem prover too weak. 3602 trivial. 0 not checked. [2018-07-24 12:23:08,845 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:23:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6161 backedges. 271 proven. 2440 refuted. 0 times theorem prover too weak. 3450 trivial. 0 not checked. [2018-07-24 12:23:12,338 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:23:12,338 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 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:23:12,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:23:12,353 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:23:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:23:13,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:23:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6161 backedges. 3785 proven. 2 refuted. 0 times theorem prover too weak. 2374 trivial. 0 not checked. [2018-07-24 12:23:15,127 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:23:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6161 backedges. 756 proven. 544 refuted. 0 times theorem prover too weak. 4861 trivial. 0 not checked. [2018-07-24 12:23:17,200 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:23:17,201 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8, 5, 5] total 31 [2018-07-24 12:23:17,201 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:23:17,203 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-24 12:23:17,203 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-24 12:23:17,204 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2018-07-24 12:23:17,204 INFO L87 Difference]: Start difference. First operand 27138 states and 28341 transitions. Second operand 21 states. [2018-07-24 12:23:19,057 WARN L169 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2018-07-24 12:23:22,181 WARN L169 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2018-07-24 12:23:22,921 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2018-07-24 12:23:23,076 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2018-07-24 12:23:23,493 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2018-07-24 12:23:26,101 WARN L169 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2018-07-24 12:23:28,622 WARN L169 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2018-07-24 12:23:30,929 WARN L169 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2018-07-24 12:23:39,910 WARN L169 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 Received shutdown request... [2018-07-24 12:23:40,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-07-24 12:23:40,224 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:23:40,232 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:23:40,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:23:40 BoogieIcfgContainer [2018-07-24 12:23:40,233 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:23:40,234 INFO L168 Benchmark]: Toolchain (without parser) took 232742.30 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -389.9 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-07-24 12:23:40,236 INFO L168 Benchmark]: CDTParser took 0.24 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 12:23:40,236 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1188.47 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-07-24 12:23:40,237 INFO L168 Benchmark]: Boogie Procedure Inliner took 176.21 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 32.0 MB). Peak memory consumption was 32.0 MB. Max. memory is 7.1 GB. [2018-07-24 12:23:40,238 INFO L168 Benchmark]: Boogie Preprocessor took 481.04 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 809.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -959.6 MB). Peak memory consumption was 61.3 MB. Max. memory is 7.1 GB. [2018-07-24 12:23:40,239 INFO L168 Benchmark]: RCFGBuilder took 5925.56 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 287.6 MB). Peak memory consumption was 287.6 MB. Max. memory is 7.1 GB. [2018-07-24 12:23:40,240 INFO L168 Benchmark]: TraceAbstraction took 224963.77 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 1.8 GB in the end (delta: 155.0 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-07-24 12:23:40,244 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 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 1188.47 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 176.21 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 32.0 MB). Peak memory consumption was 32.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 481.04 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 809.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -959.6 MB). Peak memory consumption was 61.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5925.56 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 287.6 MB). Peak memory consumption was 287.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 224963.77 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 1.8 GB in the end (delta: 155.0 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 76). Cancelled while BasicCegarLoop was constructing difference of abstraction (27138states) and interpolant automaton (currently 56 states, 21 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 83 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 410 locations, 1 error locations. TIMEOUT Result, 224.8s OverallTime, 16 OverallIterations, 11 TraceHistogramMax, 136.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2385 SDtfs, 40392 SDslu, 3185 SDs, 0 SdLazy, 63522 SolverSat, 9264 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 106.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32739 GetRequests, 32389 SyntacticMatches, 28 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3829 ImplicationChecksByTransitivity, 22.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30071occurred 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, 15 MinimizatonAttempts, 8549 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.9s SsaConstructionTime, 7.4s SatisfiabilityAnalysisTime, 56.4s InterpolantComputationTime, 27185 NumberOfCodeBlocks, 27185 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 43304 ConstructedInterpolants, 7 QuantifiedInterpolants, 264539976 SizeOfPredicates, 25 NumberOfNonLiveVariables, 21094 ConjunctsInSsa, 166 ConjunctsInUnsatCore, 42 InterpolantComputations, 12 PerfectInterpolantSequences, 94304/113944 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/Problem16_label41_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-23-40-264.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem16_label41_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-23-40-264.csv Completed graceful shutdown