java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label10_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ddc4263 [2018-08-07 13:00:27,589 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-08-07 13:00:27,591 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-08-07 13:00:27,603 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-08-07 13:00:27,603 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-08-07 13:00:27,604 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-08-07 13:00:27,606 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-08-07 13:00:27,607 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-08-07 13:00:27,609 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-08-07 13:00:27,610 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-08-07 13:00:27,611 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-08-07 13:00:27,611 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-08-07 13:00:27,612 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-08-07 13:00:27,613 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-08-07 13:00:27,614 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-08-07 13:00:27,615 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-08-07 13:00:27,616 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-08-07 13:00:27,617 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-08-07 13:00:27,619 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-08-07 13:00:27,621 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-08-07 13:00:27,625 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-08-07 13:00:27,626 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-08-07 13:00:27,631 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-08-07 13:00:27,632 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-08-07 13:00:27,633 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-08-07 13:00:27,633 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-08-07 13:00:27,634 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-08-07 13:00:27,636 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-08-07 13:00:27,637 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-08-07 13:00:27,638 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-08-07 13:00:27,638 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-08-07 13:00:27,638 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-08-07 13:00:27,639 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-08-07 13:00:27,639 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-08-07 13:00:27,641 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-08-07 13:00:27,642 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-08-07 13:00:27,642 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 [2018-08-07 13:00:27,671 INFO L110 SettingsManager]: Loading preferences was successful [2018-08-07 13:00:27,671 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-08-07 13:00:27,673 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-08-07 13:00:27,673 INFO L133 SettingsManager]: * User list type=DISABLED [2018-08-07 13:00:27,673 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-08-07 13:00:27,673 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-08-07 13:00:27,673 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-08-07 13:00:27,674 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-08-07 13:00:27,674 INFO L133 SettingsManager]: * Log string format=TERM [2018-08-07 13:00:27,674 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-08-07 13:00:27,674 INFO L133 SettingsManager]: * Interval Domain=false [2018-08-07 13:00:27,675 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-08-07 13:00:27,675 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-08-07 13:00:27,675 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-08-07 13:00:27,676 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-08-07 13:00:27,677 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-08-07 13:00:27,677 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-08-07 13:00:27,677 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-08-07 13:00:27,677 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-08-07 13:00:27,678 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-08-07 13:00:27,679 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-08-07 13:00:27,679 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-08-07 13:00:27,679 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-08-07 13:00:27,679 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 13:00:27,680 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-08-07 13:00:27,680 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-08-07 13:00:27,680 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-08-07 13:00:27,680 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-08-07 13:00:27,680 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-08-07 13:00:27,680 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-08-07 13:00:27,681 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-08-07 13:00:27,681 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-08-07 13:00:27,681 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-08-07 13:00:27,748 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-08-07 13:00:27,761 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-08-07 13:00:27,765 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-08-07 13:00:27,766 INFO L271 PluginConnector]: Initializing CDTParser... [2018-08-07 13:00:27,767 INFO L276 PluginConnector]: CDTParser initialized [2018-08-07 13:00:27,767 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label10_true-unreach-call.c [2018-08-07 13:00:28,116 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecf2c0572/4128bfaecfdf46fda86284032cf601ee/FLAG022492425 [2018-08-07 13:00:28,506 INFO L276 CDTParser]: Found 1 translation units. [2018-08-07 13:00:28,507 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label10_true-unreach-call.c [2018-08-07 13:00:28,545 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecf2c0572/4128bfaecfdf46fda86284032cf601ee/FLAG022492425 [2018-08-07 13:00:28,567 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecf2c0572/4128bfaecfdf46fda86284032cf601ee [2018-08-07 13:00:28,581 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-08-07 13:00:28,584 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-08-07 13:00:28,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-08-07 13:00:28,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-08-07 13:00:28,594 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-08-07 13:00:28,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 01:00:28" (1/1) ... [2018-08-07 13:00:28,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b765d93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:28, skipping insertion in model container [2018-08-07 13:00:28,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 01:00:28" (1/1) ... [2018-08-07 13:00:28,871 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-08-07 13:00:29,726 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 13:00:29,744 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-08-07 13:00:30,292 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 13:00:30,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:30 WrapperNode [2018-08-07 13:00:30,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-08-07 13:00:30,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-08-07 13:00:30,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-08-07 13:00:30,519 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-08-07 13:00:30,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:30" (1/1) ... [2018-08-07 13:00:30,617 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:30" (1/1) ... [2018-08-07 13:00:30,822 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-08-07 13:00:30,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-08-07 13:00:30,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-08-07 13:00:30,823 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-08-07 13:00:31,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:30" (1/1) ... [2018-08-07 13:00:31,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:30" (1/1) ... [2018-08-07 13:00:31,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:30" (1/1) ... [2018-08-07 13:00:31,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:30" (1/1) ... [2018-08-07 13:00:31,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:30" (1/1) ... [2018-08-07 13:00:31,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:30" (1/1) ... [2018-08-07 13:00:31,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:30" (1/1) ... [2018-08-07 13:00:31,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-08-07 13:00:31,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-08-07 13:00:31,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-08-07 13:00:31,798 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-08-07 13:00:31,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:30" (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 [2018-08-07 13:00:31,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-08-07 13:00:31,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-08-07 13:00:31,874 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-08-07 13:00:31,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-08-07 13:00:31,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-08-07 13:00:31,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-08-07 13:00:31,875 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-08-07 13:00:31,875 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-08-07 13:00:31,875 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-08-07 13:00:31,875 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-08-07 13:00:41,331 INFO L273 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-08-07 13:00:41,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 01:00:41 BoogieIcfgContainer [2018-08-07 13:00:41,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-08-07 13:00:41,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-08-07 13:00:41,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-08-07 13:00:41,339 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-08-07 13:00:41,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.08 01:00:28" (1/3) ... [2018-08-07 13:00:41,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e51f20f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 01:00:41, skipping insertion in model container [2018-08-07 13:00:41,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:30" (2/3) ... [2018-08-07 13:00:41,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e51f20f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 01:00:41, skipping insertion in model container [2018-08-07 13:00:41,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 01:00:41" (3/3) ... [2018-08-07 13:00:41,343 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label10_true-unreach-call.c [2018-08-07 13:00:41,353 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-08-07 13:00:41,363 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-08-07 13:00:41,424 INFO L129 ementStrategyFactory]: Using default assertion order modulation [2018-08-07 13:00:41,424 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-08-07 13:00:41,424 INFO L382 AbstractCegarLoop]: Hoare is true [2018-08-07 13:00:41,424 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-08-07 13:00:41,425 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-08-07 13:00:41,425 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-08-07 13:00:41,425 INFO L386 AbstractCegarLoop]: Difference is false [2018-08-07 13:00:41,425 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-08-07 13:00:41,425 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-08-07 13:00:41,458 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-08-07 13:00:41,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-08-07 13:00:41,471 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:00:41,478 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:00:41,479 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:00:41,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1242130052, now seen corresponding path program 1 times [2018-08-07 13:00:41,490 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:00:41,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:00:41,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:00:41,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:00:41,547 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:00:41,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:00:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 13:00:42,046 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 13:00:42,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-08-07 13:00:42,047 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:00:42,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-07 13:00:42,069 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-07 13:00:42,069 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 13:00:42,072 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-08-07 13:00:52,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:00:52,888 INFO L93 Difference]: Finished difference Result 2162 states and 4007 transitions. [2018-08-07 13:00:52,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-08-07 13:00:52,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2018-08-07 13:00:52,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:00:52,923 INFO L225 Difference]: With dead ends: 2162 [2018-08-07 13:00:52,923 INFO L226 Difference]: Without dead ends: 1552 [2018-08-07 13:00:52,936 INFO L603 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 [2018-08-07 13:00:52,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2018-08-07 13:00:53,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1525. [2018-08-07 13:00:53,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1525 states. [2018-08-07 13:00:53,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 2696 transitions. [2018-08-07 13:00:53,080 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 2696 transitions. Word has length 46 [2018-08-07 13:00:53,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:00:53,081 INFO L480 AbstractCegarLoop]: Abstraction has 1525 states and 2696 transitions. [2018-08-07 13:00:53,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-08-07 13:00:53,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 2696 transitions. [2018-08-07 13:00:53,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-08-07 13:00:53,096 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:00:53,097 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:00:53,097 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:00:53,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1454824461, now seen corresponding path program 1 times [2018-08-07 13:00:53,100 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:00:53,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:00:53,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:00:53,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:00:53,101 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:00:53,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:00:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 13:00:53,429 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 13:00:53,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-08-07 13:00:53,430 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:00:53,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 13:00:53,432 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 13:00:53,432 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 13:00:53,433 INFO L87 Difference]: Start difference. First operand 1525 states and 2696 transitions. Second operand 6 states. [2018-08-07 13:01:04,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:01:04,076 INFO L93 Difference]: Finished difference Result 4431 states and 8042 transitions. [2018-08-07 13:01:04,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 13:01:04,080 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2018-08-07 13:01:04,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:01:04,107 INFO L225 Difference]: With dead ends: 4431 [2018-08-07 13:01:04,107 INFO L226 Difference]: Without dead ends: 2912 [2018-08-07 13:01:04,114 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-08-07 13:01:04,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2018-08-07 13:01:04,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 2878. [2018-08-07 13:01:04,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2878 states. [2018-08-07 13:01:04,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2878 states to 2878 states and 4713 transitions. [2018-08-07 13:01:04,240 INFO L78 Accepts]: Start accepts. Automaton has 2878 states and 4713 transitions. Word has length 125 [2018-08-07 13:01:04,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:01:04,241 INFO L480 AbstractCegarLoop]: Abstraction has 2878 states and 4713 transitions. [2018-08-07 13:01:04,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 13:01:04,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2878 states and 4713 transitions. [2018-08-07 13:01:04,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-08-07 13:01:04,251 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:01:04,251 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:01:04,252 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:01:04,252 INFO L82 PathProgramCache]: Analyzing trace with hash 361568994, now seen corresponding path program 1 times [2018-08-07 13:01:04,252 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:01:04,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:01:04,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:01:04,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:01:04,254 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:01:04,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:01:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 13:01:04,535 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 13:01:04,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-08-07 13:01:04,535 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:01:04,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 13:01:04,536 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 13:01:04,536 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 13:01:04,537 INFO L87 Difference]: Start difference. First operand 2878 states and 4713 transitions. Second operand 6 states. [2018-08-07 13:01:10,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:01:10,585 INFO L93 Difference]: Finished difference Result 7152 states and 11703 transitions. [2018-08-07 13:01:10,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 13:01:10,586 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2018-08-07 13:01:10,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:01:10,611 INFO L225 Difference]: With dead ends: 7152 [2018-08-07 13:01:10,611 INFO L226 Difference]: Without dead ends: 4280 [2018-08-07 13:01:10,625 INFO L603 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 [2018-08-07 13:01:10,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4280 states. [2018-08-07 13:01:10,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4280 to 4238. [2018-08-07 13:01:10,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4238 states. [2018-08-07 13:01:10,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4238 states to 4238 states and 5870 transitions. [2018-08-07 13:01:10,762 INFO L78 Accepts]: Start accepts. Automaton has 4238 states and 5870 transitions. Word has length 126 [2018-08-07 13:01:10,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:01:10,762 INFO L480 AbstractCegarLoop]: Abstraction has 4238 states and 5870 transitions. [2018-08-07 13:01:10,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 13:01:10,766 INFO L276 IsEmpty]: Start isEmpty. Operand 4238 states and 5870 transitions. [2018-08-07 13:01:10,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-08-07 13:01:10,772 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:01:10,772 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-08-07 13:01:10,772 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:01:10,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1175145471, now seen corresponding path program 1 times [2018-08-07 13:01:10,773 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:01:10,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:01:10,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:01:10,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:01:10,774 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:01:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:01:11,120 WARN L170 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 13:01:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 103 proven. 47 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-08-07 13:01:11,911 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:01:11,911 INFO L194 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 [2018-08-07 13:01:11,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:01:11,932 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:01:12,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:01:12,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:01:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-08-07 13:01:12,363 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:01:12,784 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-08-07 13:01:12,818 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-08-07 13:01:12,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2018-08-07 13:01:12,818 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:01:12,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 13:01:12,819 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 13:01:12,820 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-08-07 13:01:12,820 INFO L87 Difference]: Start difference. First operand 4238 states and 5870 transitions. Second operand 3 states. [2018-08-07 13:01:20,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:01:20,047 INFO L93 Difference]: Finished difference Result 12466 states and 17703 transitions. [2018-08-07 13:01:20,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 13:01:20,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 213 [2018-08-07 13:01:20,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:01:20,089 INFO L225 Difference]: With dead ends: 12466 [2018-08-07 13:01:20,090 INFO L226 Difference]: Without dead ends: 8234 [2018-08-07 13:01:20,120 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 426 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-08-07 13:01:20,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8234 states. [2018-08-07 13:01:20,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8234 to 8232. [2018-08-07 13:01:20,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8232 states. [2018-08-07 13:01:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8232 states to 8232 states and 10655 transitions. [2018-08-07 13:01:20,318 INFO L78 Accepts]: Start accepts. Automaton has 8232 states and 10655 transitions. Word has length 213 [2018-08-07 13:01:20,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:01:20,319 INFO L480 AbstractCegarLoop]: Abstraction has 8232 states and 10655 transitions. [2018-08-07 13:01:20,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 13:01:20,319 INFO L276 IsEmpty]: Start isEmpty. Operand 8232 states and 10655 transitions. [2018-08-07 13:01:20,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-08-07 13:01:20,331 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:01:20,332 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-08-07 13:01:20,332 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:01:20,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1756484671, now seen corresponding path program 1 times [2018-08-07 13:01:20,333 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:01:20,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:01:20,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:01:20,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:01:20,334 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:01:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:01:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 83 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-08-07 13:01:21,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:01:21,257 INFO L194 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 [2018-08-07 13:01:21,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:01:21,271 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:01:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:01:21,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:01:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 83 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-08-07 13:01:21,711 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:01:21,882 WARN L170 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-08-07 13:01:21,983 WARN L170 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-08-07 13:01:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 83 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 13:01:25,823 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:01:25,823 INFO L194 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 [2018-08-07 13:01:25,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:01:25,847 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:01:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:01:26,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:01:26,354 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 83 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-08-07 13:01:26,354 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:01:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 83 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 13:01:29,103 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 13:01:29,103 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 8] total 15 [2018-08-07 13:01:29,103 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 13:01:29,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-08-07 13:01:29,104 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-08-07 13:01:29,105 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-08-07 13:01:29,105 INFO L87 Difference]: Start difference. First operand 8232 states and 10655 transitions. Second operand 10 states. [2018-08-07 13:01:51,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:01:51,930 INFO L93 Difference]: Finished difference Result 41109 states and 60649 transitions. [2018-08-07 13:01:51,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-08-07 13:01:51,931 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 276 [2018-08-07 13:01:51,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:01:52,156 INFO L225 Difference]: With dead ends: 41109 [2018-08-07 13:01:52,156 INFO L226 Difference]: Without dead ends: 32883 [2018-08-07 13:01:52,326 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1124 GetRequests, 1092 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2018-08-07 13:01:52,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32883 states. [2018-08-07 13:01:53,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32883 to 32380. [2018-08-07 13:01:53,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32380 states. [2018-08-07 13:01:53,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32380 states to 32380 states and 41330 transitions. [2018-08-07 13:01:53,368 INFO L78 Accepts]: Start accepts. Automaton has 32380 states and 41330 transitions. Word has length 276 [2018-08-07 13:01:53,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:01:53,369 INFO L480 AbstractCegarLoop]: Abstraction has 32380 states and 41330 transitions. [2018-08-07 13:01:53,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-08-07 13:01:53,369 INFO L276 IsEmpty]: Start isEmpty. Operand 32380 states and 41330 transitions. [2018-08-07 13:01:53,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2018-08-07 13:01:53,392 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:01:53,393 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:01:53,393 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:01:53,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1310477379, now seen corresponding path program 1 times [2018-08-07 13:01:53,394 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:01:53,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:01:53,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:01:53,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:01:53,395 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:01:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:01:53,811 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 146 proven. 37 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 13:01:53,811 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:01:53,811 INFO L194 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 [2018-08-07 13:01:53,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:01:53,829 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:01:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:01:53,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:01:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-08-07 13:01:54,114 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:01:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-08-07 13:01:54,567 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-08-07 13:01:54,567 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 6 [2018-08-07 13:01:54,567 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:01:54,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 13:01:54,568 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 13:01:54,568 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 13:01:54,569 INFO L87 Difference]: Start difference. First operand 32380 states and 41330 transitions. Second operand 3 states. [2018-08-07 13:01:59,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:01:59,986 INFO L93 Difference]: Finished difference Result 64754 states and 82875 transitions. [2018-08-07 13:01:59,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 13:01:59,986 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 281 [2018-08-07 13:01:59,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:02:00,072 INFO L225 Difference]: With dead ends: 64754 [2018-08-07 13:02:00,072 INFO L226 Difference]: Without dead ends: 32380 [2018-08-07 13:02:00,198 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 562 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 13:02:00,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32380 states. [2018-08-07 13:02:00,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32380 to 31943. [2018-08-07 13:02:00,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31943 states. [2018-08-07 13:02:00,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31943 states to 31943 states and 39275 transitions. [2018-08-07 13:02:00,819 INFO L78 Accepts]: Start accepts. Automaton has 31943 states and 39275 transitions. Word has length 281 [2018-08-07 13:02:00,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:02:00,821 INFO L480 AbstractCegarLoop]: Abstraction has 31943 states and 39275 transitions. [2018-08-07 13:02:00,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 13:02:00,821 INFO L276 IsEmpty]: Start isEmpty. Operand 31943 states and 39275 transitions. [2018-08-07 13:02:00,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2018-08-07 13:02:00,838 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:02:00,839 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:02:00,839 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:02:00,839 INFO L82 PathProgramCache]: Analyzing trace with hash -892802894, now seen corresponding path program 1 times [2018-08-07 13:02:00,840 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:02:00,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:02:00,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:02:00,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:02:00,841 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:02:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:02:01,242 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-08-07 13:02:01,242 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 13:02:01,242 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-08-07 13:02:01,243 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:02:01,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-07 13:02:01,243 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-07 13:02:01,243 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 13:02:01,244 INFO L87 Difference]: Start difference. First operand 31943 states and 39275 transitions. Second operand 4 states. [2018-08-07 13:02:09,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:02:09,207 INFO L93 Difference]: Finished difference Result 82471 states and 107072 transitions. [2018-08-07 13:02:09,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-08-07 13:02:09,208 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 285 [2018-08-07 13:02:09,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:02:09,384 INFO L225 Difference]: With dead ends: 82471 [2018-08-07 13:02:09,384 INFO L226 Difference]: Without dead ends: 50534 [2018-08-07 13:02:09,475 INFO L603 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 [2018-08-07 13:02:09,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50534 states. [2018-08-07 13:02:10,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50534 to 50523. [2018-08-07 13:02:10,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50523 states. [2018-08-07 13:02:10,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50523 states to 50523 states and 65218 transitions. [2018-08-07 13:02:10,476 INFO L78 Accepts]: Start accepts. Automaton has 50523 states and 65218 transitions. Word has length 285 [2018-08-07 13:02:10,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:02:10,476 INFO L480 AbstractCegarLoop]: Abstraction has 50523 states and 65218 transitions. [2018-08-07 13:02:10,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-08-07 13:02:10,477 INFO L276 IsEmpty]: Start isEmpty. Operand 50523 states and 65218 transitions. [2018-08-07 13:02:10,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-08-07 13:02:10,521 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:02:10,522 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:02:10,522 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:02:10,522 INFO L82 PathProgramCache]: Analyzing trace with hash 994460818, now seen corresponding path program 1 times [2018-08-07 13:02:10,522 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:02:10,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:02:10,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:02:10,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:02:10,523 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:02:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:02:11,142 WARN L170 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-08-07 13:02:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 125 proven. 245 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-08-07 13:02:11,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:02:11,498 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 13:02:11,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:02:11,512 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:02:11,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:02:11,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:02:11,890 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 224 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2018-08-07 13:02:11,890 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:02:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 117 proven. 177 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-08-07 13:02:12,403 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 13:02:12,404 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 5] total 13 [2018-08-07 13:02:12,404 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:02:12,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 13:02:12,405 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 13:02:12,405 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-08-07 13:02:12,405 INFO L87 Difference]: Start difference. First operand 50523 states and 65218 transitions. Second operand 5 states. [2018-08-07 13:02:27,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:02:27,135 INFO L93 Difference]: Finished difference Result 116916 states and 149575 transitions. [2018-08-07 13:02:27,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 13:02:27,136 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 358 [2018-08-07 13:02:27,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:02:27,369 INFO L225 Difference]: With dead ends: 116916 [2018-08-07 13:02:27,370 INFO L226 Difference]: Without dead ends: 65528 [2018-08-07 13:02:27,519 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 714 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2018-08-07 13:02:27,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65528 states. [2018-08-07 13:02:29,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65528 to 62796. [2018-08-07 13:02:29,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62796 states. [2018-08-07 13:02:29,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62796 states to 62796 states and 79200 transitions. [2018-08-07 13:02:29,350 INFO L78 Accepts]: Start accepts. Automaton has 62796 states and 79200 transitions. Word has length 358 [2018-08-07 13:02:29,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:02:29,350 INFO L480 AbstractCegarLoop]: Abstraction has 62796 states and 79200 transitions. [2018-08-07 13:02:29,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 13:02:29,351 INFO L276 IsEmpty]: Start isEmpty. Operand 62796 states and 79200 transitions. [2018-08-07 13:02:29,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2018-08-07 13:02:29,404 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:02:29,405 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:02:29,405 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:02:29,405 INFO L82 PathProgramCache]: Analyzing trace with hash -670709021, now seen corresponding path program 1 times [2018-08-07 13:02:29,405 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:02:29,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:02:29,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:02:29,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:02:29,407 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:02:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:02:30,065 WARN L170 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2018-08-07 13:02:30,479 WARN L170 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 5 [2018-08-07 13:02:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 354 proven. 37 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2018-08-07 13:02:30,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:02:30,610 INFO L194 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 [2018-08-07 13:02:30,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:02:30,625 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:02:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:02:30,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:02:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 486 proven. 2 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2018-08-07 13:02:31,035 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:02:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 239 proven. 183 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-08-07 13:02:31,663 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:02:31,663 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 13:02:31,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:02:31,678 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:02:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:02:32,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:02:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 414 proven. 2 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2018-08-07 13:02:32,175 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:02:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 169 proven. 317 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2018-08-07 13:02:33,382 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 13:02:33,382 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 16 [2018-08-07 13:02:33,383 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 13:02:33,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-08-07 13:02:33,384 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-08-07 13:02:33,384 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-08-07 13:02:33,385 INFO L87 Difference]: Start difference. First operand 62796 states and 79200 transitions. Second operand 10 states. [2018-08-07 13:03:03,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:03:03,889 INFO L93 Difference]: Finished difference Result 194632 states and 250421 transitions. [2018-08-07 13:03:03,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-08-07 13:03:03,890 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 433 [2018-08-07 13:03:03,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:03:04,099 INFO L225 Difference]: With dead ends: 194632 [2018-08-07 13:03:04,099 INFO L226 Difference]: Without dead ends: 60760 [2018-08-07 13:03:04,606 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1817 GetRequests, 1756 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=708, Invalid=2952, Unknown=0, NotChecked=0, Total=3660 [2018-08-07 13:03:04,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60760 states. [2018-08-07 13:03:05,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60760 to 58425. [2018-08-07 13:03:05,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58425 states. [2018-08-07 13:03:06,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58425 states to 58425 states and 72077 transitions. [2018-08-07 13:03:06,656 INFO L78 Accepts]: Start accepts. Automaton has 58425 states and 72077 transitions. Word has length 433 [2018-08-07 13:03:06,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:03:06,656 INFO L480 AbstractCegarLoop]: Abstraction has 58425 states and 72077 transitions. [2018-08-07 13:03:06,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-08-07 13:03:06,656 INFO L276 IsEmpty]: Start isEmpty. Operand 58425 states and 72077 transitions. [2018-08-07 13:03:06,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2018-08-07 13:03:06,686 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:03:06,686 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-08-07 13:03:06,687 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:03:06,687 INFO L82 PathProgramCache]: Analyzing trace with hash -881847412, now seen corresponding path program 1 times [2018-08-07 13:03:06,687 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:03:06,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:03:06,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:03:06,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:03:06,689 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:03:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:03:07,711 WARN L170 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2018-08-07 13:03:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 170 proven. 298 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2018-08-07 13:03:08,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:03:08,303 INFO L194 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 [2018-08-07 13:03:08,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:03:08,322 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:03:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:03:08,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:03:11,157 WARN L170 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 83 DAG size of output: 24 [2018-08-07 13:03:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 499 proven. 55 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2018-08-07 13:03:11,790 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:03:11,957 WARN L170 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2018-08-07 13:03:12,076 WARN L170 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2018-08-07 13:03:12,824 WARN L170 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2018-08-07 13:03:17,092 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-08-07 13:03:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 167 proven. 457 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-08-07 13:03:19,460 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:03:19,460 INFO L194 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 [2018-08-07 13:03:19,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:03:19,478 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:03:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:03:19,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:03:26,234 WARN L170 SmtUtils]: Spent 6.07 s on a formula simplification. DAG size of input: 48 DAG size of output: 21 [2018-08-07 13:03:26,518 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 552 proven. 2 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2018-08-07 13:03:26,518 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:03:31,113 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-08-07 13:03:32,493 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 167 proven. 457 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-08-07 13:03:32,495 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 13:03:32,496 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 8, 8] total 33 [2018-08-07 13:03:32,496 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 13:03:32,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-08-07 13:03:32,499 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-08-07 13:03:32,499 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=914, Unknown=3, NotChecked=0, Total=1056 [2018-08-07 13:03:32,499 INFO L87 Difference]: Start difference. First operand 58425 states and 72077 transitions. Second operand 16 states. [2018-08-07 13:04:14,813 WARN L170 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 36 Received shutdown request... [2018-08-07 13:04:24,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-08-07 13:04:24,034 WARN L549 AbstractCegarLoop]: Verification canceled [2018-08-07 13:04:24,040 WARN L202 ceAbstractionStarter]: Timeout [2018-08-07 13:04:24,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.08 01:04:24 BoogieIcfgContainer [2018-08-07 13:04:24,041 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-08-07 13:04:24,042 INFO L168 Benchmark]: Toolchain (without parser) took 235460.37 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.2 GB). Free memory was 1.4 GB in the beginning and 2.5 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-08-07 13:04:24,043 INFO L168 Benchmark]: CDTParser took 0.22 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. [2018-08-07 13:04:24,043 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1932.70 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 179.7 MB). Peak memory consumption was 179.7 MB. Max. memory is 7.1 GB. [2018-08-07 13:04:24,044 INFO L168 Benchmark]: Boogie Procedure Inliner took 303.20 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 53.4 MB). Peak memory consumption was 53.4 MB. Max. memory is 7.1 GB. [2018-08-07 13:04:24,045 INFO L168 Benchmark]: Boogie Preprocessor took 975.21 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 936.9 MB). Free memory was 1.2 GB in the beginning and 2.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 123.6 MB. Max. memory is 7.1 GB. [2018-08-07 13:04:24,046 INFO L168 Benchmark]: RCFGBuilder took 9534.48 ms. Allocated memory is still 2.5 GB. Free memory was 2.4 GB in the beginning and 1.9 GB in the end (delta: 501.4 MB). Peak memory consumption was 501.4 MB. Max. memory is 7.1 GB. [2018-08-07 13:04:24,046 INFO L168 Benchmark]: TraceAbstraction took 222707.35 ms. Allocated memory was 2.5 GB in the beginning and 3.8 GB in the end (delta: 1.3 GB). Free memory was 1.9 GB in the beginning and 2.5 GB in the end (delta: -626.6 MB). Peak memory consumption was 677.8 MB. Max. memory is 7.1 GB. [2018-08-07 13:04:24,051 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 1932.70 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 179.7 MB). Peak memory consumption was 179.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 303.20 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 53.4 MB). Peak memory consumption was 53.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 975.21 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 936.9 MB). Free memory was 1.2 GB in the beginning and 2.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 123.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9534.48 ms. Allocated memory is still 2.5 GB. Free memory was 2.4 GB in the beginning and 1.9 GB in the end (delta: 501.4 MB). Peak memory consumption was 501.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 222707.35 ms. Allocated memory was 2.5 GB in the beginning and 3.8 GB in the end (delta: 1.3 GB). Free memory was 1.9 GB in the beginning and 2.5 GB in the end (delta: -626.6 MB). Peak memory consumption was 677.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 125]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 125). Cancelled while BasicCegarLoop was constructing difference of abstraction (58425states) and FLOYD_HOARE automaton (currently 101 states, 16 states before enhancement), while ReachableStatesComputation was computing reachable states (152675 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 222.6s OverallTime, 10 OverallIterations, 5 TraceHistogramMax, 169.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3627 SDtfs, 38562 SDslu, 4101 SDs, 0 SdLazy, 50348 SolverSat, 12030 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 140.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7047 GetRequests, 6776 SyntacticMatches, 21 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6163 ImplicationChecksByTransitivity, 36.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62796occurred in iteration=8, 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: 7.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 6123 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 41.3s InterpolantComputationTime, 6030 NumberOfCodeBlocks, 6030 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 9350 ConstructedInterpolants, 382 QuantifiedInterpolants, 18685569 SizeOfPredicates, 30 NumberOfNonLiveVariables, 5428 ConjunctsInSsa, 92 ConjunctsInUnsatCore, 28 InterpolantComputations, 9 PerfectInterpolantSequences, 7622/10189 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem17_label10_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-08-07_13-04-24-065.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem17_label10_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-08-07_13-04-24-065.csv Completed graceful shutdown