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/Problem14_label45_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 12:04:28,630 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 12:04:28,632 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 12:04:28,645 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 12:04:28,645 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 12:04:28,646 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 12:04:28,648 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 12:04:28,650 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 12:04:28,651 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 12:04:28,652 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 12:04:28,653 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 12:04:28,654 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 12:04:28,654 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 12:04:28,655 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 12:04:28,657 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 12:04:28,657 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 12:04:28,658 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 12:04:28,660 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 12:04:28,662 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 12:04:28,664 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 12:04:28,665 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 12:04:28,666 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 12:04:28,669 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 12:04:28,669 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 12:04:28,669 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 12:04:28,670 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 12:04:28,671 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 12:04:28,672 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 12:04:28,673 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 12:04:28,674 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 12:04:28,674 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 12:04:28,675 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 12:04:28,675 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 12:04:28,676 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 12:04:28,677 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 12:04:28,677 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 12:04:28,678 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-10 12:04:28,693 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 12:04:28,694 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 12:04:28,695 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 12:04:28,695 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 12:04:28,695 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 12:04:28,695 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 12:04:28,695 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 12:04:28,696 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 12:04:28,696 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 12:04:28,696 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 12:04:28,696 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 12:04:28,697 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 12:04:28,697 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 12:04:28,697 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 12:04:28,697 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 12:04:28,698 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 12:04:28,698 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 12:04:28,698 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 12:04:28,698 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 12:04:28,698 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 12:04:28,699 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 12:04:28,699 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 12:04:28,699 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 12:04:28,699 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 12:04:28,699 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 12:04:28,700 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 12:04:28,700 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 12:04:28,700 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 12:04:28,700 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 12:04:28,701 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 12:04:28,701 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 12:04:28,701 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 12:04:28,701 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 12:04:28,761 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 12:04:28,778 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 12:04:28,785 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 12:04:28,787 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 12:04:28,788 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 12:04:28,789 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label45_true-unreach-call_false-termination.c [2018-09-10 12:04:29,139 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdf2ee887/5ad2a6fc99de444aaba75bafa5255612/FLAGdebc868b4 [2018-09-10 12:04:29,457 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 12:04:29,460 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label45_true-unreach-call_false-termination.c [2018-09-10 12:04:29,484 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdf2ee887/5ad2a6fc99de444aaba75bafa5255612/FLAGdebc868b4 [2018-09-10 12:04:29,509 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdf2ee887/5ad2a6fc99de444aaba75bafa5255612 [2018-09-10 12:04:29,521 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 12:04:29,526 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 12:04:29,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 12:04:29,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 12:04:29,538 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 12:04:29,540 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:04:29" (1/1) ... [2018-09-10 12:04:29,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cc71e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:04:29, skipping insertion in model container [2018-09-10 12:04:29,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:04:29" (1/1) ... [2018-09-10 12:04:29,797 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 12:04:30,132 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:04:30,152 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 12:04:30,285 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:04:30,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:04:30 WrapperNode [2018-09-10 12:04:30,342 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 12:04:30,343 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 12:04:30,343 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 12:04:30,343 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 12:04:30,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:04:30" (1/1) ... [2018-09-10 12:04:30,386 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:04:30" (1/1) ... [2018-09-10 12:04:30,486 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 12:04:30,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 12:04:30,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 12:04:30,487 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 12:04:30,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:04:30" (1/1) ... [2018-09-10 12:04:30,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:04:30" (1/1) ... [2018-09-10 12:04:30,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:04:30" (1/1) ... [2018-09-10 12:04:30,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:04:30" (1/1) ... [2018-09-10 12:04:30,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:04:30" (1/1) ... [2018-09-10 12:04:30,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:04:30" (1/1) ... [2018-09-10 12:04:30,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:04:30" (1/1) ... [2018-09-10 12:04:30,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 12:04:30,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 12:04:30,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 12:04:30,794 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 12:04:30,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:04:30" (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 [2018-09-10 12:04:30,866 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_output [2018-09-10 12:04:30,866 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_output [2018-09-10 12:04:30,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 12:04:30,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 12:04:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 12:04:30,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 12:04:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 12:04:30,867 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 12:04:34,552 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 12:04:34,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:04:34 BoogieIcfgContainer [2018-09-10 12:04:34,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 12:04:34,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 12:04:34,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 12:04:34,557 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 12:04:34,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 12:04:29" (1/3) ... [2018-09-10 12:04:34,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@338b750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:04:34, skipping insertion in model container [2018-09-10 12:04:34,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:04:30" (2/3) ... [2018-09-10 12:04:34,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@338b750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:04:34, skipping insertion in model container [2018-09-10 12:04:34,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:04:34" (3/3) ... [2018-09-10 12:04:34,561 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label45_true-unreach-call_false-termination.c [2018-09-10 12:04:34,570 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 12:04:34,579 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 12:04:34,636 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 12:04:34,637 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 12:04:34,637 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 12:04:34,638 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 12:04:34,638 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 12:04:34,638 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 12:04:34,638 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 12:04:34,638 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 12:04:34,639 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 12:04:34,675 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-09-10 12:04:34,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-10 12:04:34,684 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:04:34,685 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] [2018-09-10 12:04:34,686 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:04:34,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1678980063, now seen corresponding path program 1 times [2018-09-10 12:04:34,694 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:04:34,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:04:34,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:34,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:04:34,748 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:04:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:35,170 WARN L175 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-09-10 12:04:35,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:04:35,193 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:04:35,194 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-10 12:04:35,194 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:04:35,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 12:04:35,219 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 12:04:35,220 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:04:35,223 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 4 states. [2018-09-10 12:04:38,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:04:38,428 INFO L93 Difference]: Finished difference Result 894 states and 1610 transitions. [2018-09-10 12:04:38,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 12:04:38,430 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2018-09-10 12:04:38,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:04:38,452 INFO L225 Difference]: With dead ends: 894 [2018-09-10 12:04:38,452 INFO L226 Difference]: Without dead ends: 633 [2018-09-10 12:04:38,463 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:04:38,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2018-09-10 12:04:38,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 434. [2018-09-10 12:04:38,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-09-10 12:04:38,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 662 transitions. [2018-09-10 12:04:38,547 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 662 transitions. Word has length 43 [2018-09-10 12:04:38,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:04:38,547 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 662 transitions. [2018-09-10 12:04:38,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 12:04:38,548 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 662 transitions. [2018-09-10 12:04:38,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-10 12:04:38,555 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:04:38,555 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:04:38,556 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:04:38,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1230860650, now seen corresponding path program 1 times [2018-09-10 12:04:38,557 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:04:38,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:04:38,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:38,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:04:38,559 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:04:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:04:38,873 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:04:38,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-10 12:04:38,874 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:04:38,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 12:04:38,876 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 12:04:38,877 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:04:38,878 INFO L87 Difference]: Start difference. First operand 434 states and 662 transitions. Second operand 4 states. [2018-09-10 12:04:42,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:04:42,006 INFO L93 Difference]: Finished difference Result 1594 states and 2534 transitions. [2018-09-10 12:04:42,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 12:04:42,008 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2018-09-10 12:04:42,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:04:42,015 INFO L225 Difference]: With dead ends: 1594 [2018-09-10 12:04:42,016 INFO L226 Difference]: Without dead ends: 780 [2018-09-10 12:04:42,023 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:04:42,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2018-09-10 12:04:42,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 780. [2018-09-10 12:04:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2018-09-10 12:04:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1153 transitions. [2018-09-10 12:04:42,070 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1153 transitions. Word has length 127 [2018-09-10 12:04:42,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:04:42,070 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 1153 transitions. [2018-09-10 12:04:42,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 12:04:42,071 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1153 transitions. [2018-09-10 12:04:42,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-10 12:04:42,075 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:04:42,075 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:04:42,075 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:04:42,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1083722862, now seen corresponding path program 1 times [2018-09-10 12:04:42,076 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:04:42,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:04:42,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:42,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:04:42,077 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:04:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:04:42,334 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:04:42,334 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-10 12:04:42,336 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:04:42,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 12:04:42,337 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 12:04:42,337 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:04:42,338 INFO L87 Difference]: Start difference. First operand 780 states and 1153 transitions. Second operand 4 states. [2018-09-10 12:04:44,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:04:44,909 INFO L93 Difference]: Finished difference Result 3018 states and 4609 transitions. [2018-09-10 12:04:44,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 12:04:44,910 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2018-09-10 12:04:44,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:04:44,937 INFO L225 Difference]: With dead ends: 3018 [2018-09-10 12:04:44,937 INFO L226 Difference]: Without dead ends: 2244 [2018-09-10 12:04:44,949 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:04:44,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2018-09-10 12:04:45,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 2244. [2018-09-10 12:04:45,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2244 states. [2018-09-10 12:04:45,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 3156 transitions. [2018-09-10 12:04:45,032 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 3156 transitions. Word has length 139 [2018-09-10 12:04:45,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:04:45,032 INFO L480 AbstractCegarLoop]: Abstraction has 2244 states and 3156 transitions. [2018-09-10 12:04:45,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 12:04:45,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 3156 transitions. [2018-09-10 12:04:45,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2018-09-10 12:04:45,044 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:04:45,044 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:04:45,045 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:04:45,045 INFO L82 PathProgramCache]: Analyzing trace with hash -2109419603, now seen corresponding path program 1 times [2018-09-10 12:04:45,045 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:04:45,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:04:45,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:45,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:04:45,047 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:04:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:04:45,417 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:04:45,417 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:04:45,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:45,433 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:04:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:45,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:04:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:04:45,884 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:04:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:04:46,427 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:04:46,428 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:04:46,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:46,450 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:04:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:46,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:04:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:04:46,937 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:04:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:04:47,414 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:04:47,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-09-10 12:04:47,414 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:04:47,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:04:47,416 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:04:47,416 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:04:47,417 INFO L87 Difference]: Start difference. First operand 2244 states and 3156 transitions. Second operand 9 states. [2018-09-10 12:04:53,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:04:53,190 INFO L93 Difference]: Finished difference Result 6566 states and 10229 transitions. [2018-09-10 12:04:53,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-10 12:04:53,191 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 259 [2018-09-10 12:04:53,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:04:53,235 INFO L225 Difference]: With dead ends: 6566 [2018-09-10 12:04:53,236 INFO L226 Difference]: Without dead ends: 3363 [2018-09-10 12:04:53,280 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1056 GetRequests, 1034 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2018-09-10 12:04:53,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3363 states. [2018-09-10 12:04:53,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3363 to 3248. [2018-09-10 12:04:53,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3248 states. [2018-09-10 12:04:53,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 4177 transitions. [2018-09-10 12:04:53,422 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 4177 transitions. Word has length 259 [2018-09-10 12:04:53,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:04:53,424 INFO L480 AbstractCegarLoop]: Abstraction has 3248 states and 4177 transitions. [2018-09-10 12:04:53,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:04:53,424 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 4177 transitions. [2018-09-10 12:04:53,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-09-10 12:04:53,446 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:04:53,446 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:04:53,446 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:04:53,447 INFO L82 PathProgramCache]: Analyzing trace with hash 505840937, now seen corresponding path program 1 times [2018-09-10 12:04:53,447 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:04:53,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:04:53,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:53,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:04:53,448 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:04:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:53,798 WARN L175 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:04:54,316 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 73 proven. 41 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-09-10 12:04:54,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:04:54,317 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:04:54,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:54,333 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:04:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:54,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:04:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:04:54,951 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:04:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:04:55,331 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:04:55,331 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:04:55,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:55,348 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:04:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:55,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:04:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 73 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-09-10 12:04:55,790 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:04:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-09-10 12:04:56,542 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-09-10 12:04:56,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 5, 5] total 11 [2018-09-10 12:04:56,542 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:04:56,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:04:56,543 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:04:56,543 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:04:56,544 INFO L87 Difference]: Start difference. First operand 3248 states and 4177 transitions. Second operand 5 states. [2018-09-10 12:04:58,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:04:58,027 INFO L93 Difference]: Finished difference Result 6231 states and 8048 transitions. [2018-09-10 12:04:58,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 12:04:58,027 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 273 [2018-09-10 12:04:58,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:04:58,046 INFO L225 Difference]: With dead ends: 6231 [2018-09-10 12:04:58,046 INFO L226 Difference]: Without dead ends: 3197 [2018-09-10 12:04:58,066 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1100 GetRequests, 1080 SyntacticMatches, 10 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:04:58,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2018-09-10 12:04:58,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 3172. [2018-09-10 12:04:58,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3172 states. [2018-09-10 12:04:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3172 states to 3172 states and 3964 transitions. [2018-09-10 12:04:58,147 INFO L78 Accepts]: Start accepts. Automaton has 3172 states and 3964 transitions. Word has length 273 [2018-09-10 12:04:58,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:04:58,147 INFO L480 AbstractCegarLoop]: Abstraction has 3172 states and 3964 transitions. [2018-09-10 12:04:58,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:04:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 3172 states and 3964 transitions. [2018-09-10 12:04:58,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-09-10 12:04:58,166 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:04:58,167 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:04:58,167 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:04:58,168 INFO L82 PathProgramCache]: Analyzing trace with hash -2054011446, now seen corresponding path program 1 times [2018-09-10 12:04:58,168 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:04:58,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:04:58,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:58,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:04:58,169 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:04:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:58,807 WARN L175 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2018-09-10 12:04:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 146 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:04:59,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:04:59,470 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:04:59,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:59,525 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:04:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:59,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:05:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-09-10 12:05:00,082 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:05:00,252 WARN L175 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-09-10 12:05:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 72 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:05:00,698 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:05:00,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 5] total 17 [2018-09-10 12:05:00,699 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:05:00,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:05:00,700 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:05:00,700 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2018-09-10 12:05:00,700 INFO L87 Difference]: Start difference. First operand 3172 states and 3964 transitions. Second operand 5 states. [2018-09-10 12:05:02,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:05:02,871 INFO L93 Difference]: Finished difference Result 7725 states and 9433 transitions. [2018-09-10 12:05:02,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 12:05:02,872 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 276 [2018-09-10 12:05:02,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:05:02,893 INFO L225 Difference]: With dead ends: 7725 [2018-09-10 12:05:02,893 INFO L226 Difference]: Without dead ends: 4363 [2018-09-10 12:05:02,906 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 548 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2018-09-10 12:05:02,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2018-09-10 12:05:02,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3982. [2018-09-10 12:05:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3982 states. [2018-09-10 12:05:02,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3982 states to 3982 states and 4775 transitions. [2018-09-10 12:05:02,997 INFO L78 Accepts]: Start accepts. Automaton has 3982 states and 4775 transitions. Word has length 276 [2018-09-10 12:05:02,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:05:02,997 INFO L480 AbstractCegarLoop]: Abstraction has 3982 states and 4775 transitions. [2018-09-10 12:05:02,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:05:02,997 INFO L276 IsEmpty]: Start isEmpty. Operand 3982 states and 4775 transitions. [2018-09-10 12:05:03,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2018-09-10 12:05:03,016 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:05:03,017 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:05:03,017 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:05:03,017 INFO L82 PathProgramCache]: Analyzing trace with hash -776514794, now seen corresponding path program 1 times [2018-09-10 12:05:03,017 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:05:03,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:03,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:03,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:03,019 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:05:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 196 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:05:04,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:05:04,080 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:05:04,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:04,090 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:05:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:04,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:05:04,586 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 301 proven. 53 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-09-10 12:05:04,586 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:05:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 118 proven. 268 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:05:05,304 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:05:05,304 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:05:05,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:05,320 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:05:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:05,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:05:06,504 WARN L175 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-10 12:05:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 301 proven. 53 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-09-10 12:05:06,799 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:05:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 118 proven. 268 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:05:07,453 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:05:07,453 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8, 8, 8] total 26 [2018-09-10 12:05:07,453 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:05:07,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-10 12:05:07,454 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-10 12:05:07,455 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2018-09-10 12:05:07,455 INFO L87 Difference]: Start difference. First operand 3982 states and 4775 transitions. Second operand 15 states. [2018-09-10 12:05:12,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:05:12,159 INFO L93 Difference]: Finished difference Result 8075 states and 9764 transitions. [2018-09-10 12:05:12,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-10 12:05:12,159 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 361 [2018-09-10 12:05:12,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:05:12,177 INFO L225 Difference]: With dead ends: 8075 [2018-09-10 12:05:12,177 INFO L226 Difference]: Without dead ends: 4266 [2018-09-10 12:05:12,191 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1485 GetRequests, 1439 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=402, Invalid=1238, Unknown=0, NotChecked=0, Total=1640 [2018-09-10 12:05:12,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4266 states. [2018-09-10 12:05:12,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4266 to 4229. [2018-09-10 12:05:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4229 states. [2018-09-10 12:05:12,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4229 states to 4229 states and 4860 transitions. [2018-09-10 12:05:12,285 INFO L78 Accepts]: Start accepts. Automaton has 4229 states and 4860 transitions. Word has length 361 [2018-09-10 12:05:12,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:05:12,285 INFO L480 AbstractCegarLoop]: Abstraction has 4229 states and 4860 transitions. [2018-09-10 12:05:12,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-10 12:05:12,286 INFO L276 IsEmpty]: Start isEmpty. Operand 4229 states and 4860 transitions. [2018-09-10 12:05:12,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2018-09-10 12:05:12,307 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:05:12,308 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-10 12:05:12,308 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:05:12,308 INFO L82 PathProgramCache]: Analyzing trace with hash -660798433, now seen corresponding path program 1 times [2018-09-10 12:05:12,309 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:05:12,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:12,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:12,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:12,310 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:05:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:13,233 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 257 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:05:13,233 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:05:13,233 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:05:13,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:13,241 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:05:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:13,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:05:13,531 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-09-10 12:05:13,531 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:05:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 108 proven. 210 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-09-10 12:05:14,092 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:05:14,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 5] total 16 [2018-09-10 12:05:14,093 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:05:14,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:05:14,094 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:05:14,094 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-09-10 12:05:14,094 INFO L87 Difference]: Start difference. First operand 4229 states and 4860 transitions. Second operand 5 states. [2018-09-10 12:05:15,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:05:15,952 INFO L93 Difference]: Finished difference Result 8565 states and 9876 transitions. [2018-09-10 12:05:15,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 12:05:15,953 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 386 [2018-09-10 12:05:15,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:05:15,968 INFO L225 Difference]: With dead ends: 8565 [2018-09-10 12:05:15,969 INFO L226 Difference]: Without dead ends: 4710 [2018-09-10 12:05:15,978 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 790 GetRequests, 769 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2018-09-10 12:05:15,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4710 states. [2018-09-10 12:05:16,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4710 to 4702. [2018-09-10 12:05:16,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4702 states. [2018-09-10 12:05:16,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4702 states to 4702 states and 5269 transitions. [2018-09-10 12:05:16,063 INFO L78 Accepts]: Start accepts. Automaton has 4702 states and 5269 transitions. Word has length 386 [2018-09-10 12:05:16,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:05:16,063 INFO L480 AbstractCegarLoop]: Abstraction has 4702 states and 5269 transitions. [2018-09-10 12:05:16,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:05:16,063 INFO L276 IsEmpty]: Start isEmpty. Operand 4702 states and 5269 transitions. [2018-09-10 12:05:16,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2018-09-10 12:05:16,088 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:05:16,088 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:05:16,088 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:05:16,089 INFO L82 PathProgramCache]: Analyzing trace with hash -319997353, now seen corresponding path program 1 times [2018-09-10 12:05:16,089 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:05:16,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:16,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:16,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:16,090 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:05:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 376 proven. 112 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-09-10 12:05:16,735 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:05:16,735 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:05:16,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:16,745 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:05:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:16,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:05:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 663 proven. 2 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-09-10 12:05:17,217 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:05:17,389 WARN L175 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-09-10 12:05:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 376 proven. 112 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-09-10 12:05:17,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:05:17,904 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 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 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:05:17,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:17,920 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:05:18,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:18,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:05:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 657 proven. 8 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-09-10 12:05:18,617 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:05:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 376 proven. 112 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-09-10 12:05:19,409 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:05:19,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 8, 5] total 16 [2018-09-10 12:05:19,410 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:05:19,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 12:05:19,411 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 12:05:19,411 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-09-10 12:05:19,412 INFO L87 Difference]: Start difference. First operand 4702 states and 5269 transitions. Second operand 7 states. [2018-09-10 12:05:21,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:05:21,400 INFO L93 Difference]: Finished difference Result 10212 states and 11667 transitions. [2018-09-10 12:05:21,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 12:05:21,409 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 497 [2018-09-10 12:05:21,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:05:21,437 INFO L225 Difference]: With dead ends: 10212 [2018-09-10 12:05:21,437 INFO L226 Difference]: Without dead ends: 4646 [2018-09-10 12:05:21,455 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2008 GetRequests, 1978 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2018-09-10 12:05:21,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2018-09-10 12:05:21,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 4641. [2018-09-10 12:05:21,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4641 states. [2018-09-10 12:05:21,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4641 states to 4641 states and 5164 transitions. [2018-09-10 12:05:21,547 INFO L78 Accepts]: Start accepts. Automaton has 4641 states and 5164 transitions. Word has length 497 [2018-09-10 12:05:21,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:05:21,548 INFO L480 AbstractCegarLoop]: Abstraction has 4641 states and 5164 transitions. [2018-09-10 12:05:21,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 12:05:21,548 INFO L276 IsEmpty]: Start isEmpty. Operand 4641 states and 5164 transitions. [2018-09-10 12:05:21,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2018-09-10 12:05:21,570 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:05:21,570 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:05:21,571 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:05:21,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1139708073, now seen corresponding path program 1 times [2018-09-10 12:05:21,571 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:05:21,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:21,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:21,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:21,573 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:05:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 511 proven. 482 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2018-09-10 12:05:22,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:05:22,862 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:05:22,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:22,871 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:05:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:23,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:05:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 872 proven. 2 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2018-09-10 12:05:23,418 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:05:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 505 proven. 112 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2018-09-10 12:05:23,949 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:05:23,949 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 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 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:05:23,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:23,965 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:05:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:24,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:05:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 664 proven. 210 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2018-09-10 12:05:24,918 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:05:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 216 proven. 690 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-10 12:05:25,738 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:05:25,739 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 8, 8] total 16 [2018-09-10 12:05:25,739 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:05:25,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-10 12:05:25,740 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-10 12:05:25,740 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2018-09-10 12:05:25,740 INFO L87 Difference]: Start difference. First operand 4641 states and 5164 transitions. Second operand 13 states. [2018-09-10 12:05:28,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:05:28,646 INFO L93 Difference]: Finished difference Result 9068 states and 10377 transitions. [2018-09-10 12:05:28,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-10 12:05:28,647 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 582 [2018-09-10 12:05:28,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:05:28,662 INFO L225 Difference]: With dead ends: 9068 [2018-09-10 12:05:28,662 INFO L226 Difference]: Without dead ends: 4602 [2018-09-10 12:05:28,672 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2358 GetRequests, 2317 SyntacticMatches, 17 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2018-09-10 12:05:28,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2018-09-10 12:05:28,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 4487. [2018-09-10 12:05:28,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4487 states. [2018-09-10 12:05:28,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4487 states to 4487 states and 4889 transitions. [2018-09-10 12:05:28,809 INFO L78 Accepts]: Start accepts. Automaton has 4487 states and 4889 transitions. Word has length 582 [2018-09-10 12:05:28,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:05:28,809 INFO L480 AbstractCegarLoop]: Abstraction has 4487 states and 4889 transitions. [2018-09-10 12:05:28,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-10 12:05:28,810 INFO L276 IsEmpty]: Start isEmpty. Operand 4487 states and 4889 transitions. [2018-09-10 12:05:28,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2018-09-10 12:05:28,823 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:05:28,823 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:05:28,824 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:05:28,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1719436843, now seen corresponding path program 2 times [2018-09-10 12:05:28,824 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:05:28,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:28,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:28,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:28,825 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:05:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 537 proven. 534 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2018-09-10 12:05:30,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:05:30,257 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:05:30,265 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-10 12:05:30,265 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 12:05:30,467 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-10 12:05:30,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 12:05:30,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:05:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 924 proven. 2 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2018-09-10 12:05:31,246 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:05:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 531 proven. 112 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2018-09-10 12:05:32,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:05:32,199 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 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 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:05:32,214 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-10 12:05:32,214 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 12:05:32,681 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-10 12:05:32,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 12:05:32,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:05:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 909 proven. 17 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2018-09-10 12:05:33,454 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:05:33,836 WARN L175 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-09-10 12:05:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 210 proven. 748 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-09-10 12:05:35,865 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:05:35,866 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5, 10, 11] total 31 [2018-09-10 12:05:35,866 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:05:35,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-10 12:05:35,868 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-10 12:05:35,869 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2018-09-10 12:05:35,869 INFO L87 Difference]: Start difference. First operand 4487 states and 4889 transitions. Second operand 18 states. [2018-09-10 12:05:38,604 WARN L175 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2018-09-10 12:05:40,556 WARN L175 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2018-09-10 12:05:42,103 WARN L175 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2018-09-10 12:05:44,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:05:44,615 INFO L93 Difference]: Finished difference Result 8906 states and 9800 transitions. [2018-09-10 12:05:44,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-10 12:05:44,616 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 608 [2018-09-10 12:05:44,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:05:44,628 INFO L225 Difference]: With dead ends: 8906 [2018-09-10 12:05:44,628 INFO L226 Difference]: Without dead ends: 4478 [2018-09-10 12:05:44,640 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2497 GetRequests, 2424 SyntacticMatches, 14 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=686, Invalid=2974, Unknown=0, NotChecked=0, Total=3660 [2018-09-10 12:05:44,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4478 states. [2018-09-10 12:05:44,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4478 to 3833. [2018-09-10 12:05:44,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3833 states. [2018-09-10 12:05:44,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 4128 transitions. [2018-09-10 12:05:44,720 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 4128 transitions. Word has length 608 [2018-09-10 12:05:44,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:05:44,721 INFO L480 AbstractCegarLoop]: Abstraction has 3833 states and 4128 transitions. [2018-09-10 12:05:44,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-10 12:05:44,722 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 4128 transitions. [2018-09-10 12:05:44,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 683 [2018-09-10 12:05:44,737 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:05:44,737 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-10 12:05:44,738 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:05:44,738 INFO L82 PathProgramCache]: Analyzing trace with hash -2131086141, now seen corresponding path program 1 times [2018-09-10 12:05:44,738 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:05:44,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:44,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 12:05:44,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:44,740 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:05:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:45,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 538 proven. 119 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-09-10 12:05:45,483 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:05:45,483 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:05:45,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:45,490 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:05:45,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:45,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:05:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 945 proven. 2 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2018-09-10 12:05:46,035 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:05:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 538 proven. 119 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-09-10 12:05:46,401 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:05:46,401 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 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 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:05:46,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:46,417 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:05:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:46,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:05:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 945 proven. 2 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2018-09-10 12:05:47,148 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:05:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 538 proven. 119 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-09-10 12:05:47,453 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:05:47,454 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-09-10 12:05:47,454 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:05:47,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 12:05:47,456 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 12:05:47,456 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-10 12:05:47,457 INFO L87 Difference]: Start difference. First operand 3833 states and 4128 transitions. Second operand 7 states. [2018-09-10 12:05:49,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:05:49,322 INFO L93 Difference]: Finished difference Result 10497 states and 12094 transitions. [2018-09-10 12:05:49,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-10 12:05:49,322 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 682 [2018-09-10 12:05:49,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:05:49,352 INFO L225 Difference]: With dead ends: 10497 [2018-09-10 12:05:49,352 INFO L226 Difference]: Without dead ends: 6855 [2018-09-10 12:05:49,366 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2741 GetRequests, 2727 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-09-10 12:05:49,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6855 states. [2018-09-10 12:05:49,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6855 to 6560. [2018-09-10 12:05:49,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6560 states. [2018-09-10 12:05:49,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6560 states to 6560 states and 7114 transitions. [2018-09-10 12:05:49,514 INFO L78 Accepts]: Start accepts. Automaton has 6560 states and 7114 transitions. Word has length 682 [2018-09-10 12:05:49,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:05:49,515 INFO L480 AbstractCegarLoop]: Abstraction has 6560 states and 7114 transitions. [2018-09-10 12:05:49,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 12:05:49,516 INFO L276 IsEmpty]: Start isEmpty. Operand 6560 states and 7114 transitions. [2018-09-10 12:05:49,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2018-09-10 12:05:49,534 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:05:49,535 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:05:49,535 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:05:49,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1778092474, now seen corresponding path program 1 times [2018-09-10 12:05:49,536 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:05:49,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:49,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:49,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:49,537 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:05:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:50,178 WARN L175 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-10 12:05:51,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 789 proven. 835 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2018-09-10 12:05:51,476 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:05:51,476 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:05:51,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:51,485 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:05:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:51,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:05:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 1323 proven. 2 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2018-09-10 12:05:52,677 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:05:52,851 WARN L175 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-09-10 12:05:53,017 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-10 12:05:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 777 proven. 112 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2018-09-10 12:05:53,804 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:05:53,804 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 19 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 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:05:53,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:53,823 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:05:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:54,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:05:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 1315 proven. 10 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2018-09-10 12:05:54,890 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:05:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 282 proven. 1075 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2018-09-10 12:05:56,355 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:05:56,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 8, 8] total 28 [2018-09-10 12:05:56,356 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:05:56,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-10 12:05:56,357 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-10 12:05:56,358 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2018-09-10 12:05:56,358 INFO L87 Difference]: Start difference. First operand 6560 states and 7114 transitions. Second operand 17 states. [2018-09-10 12:06:03,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:06:03,284 INFO L93 Difference]: Finished difference Result 12369 states and 13865 transitions. [2018-09-10 12:06:03,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-10 12:06:03,284 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 771 [2018-09-10 12:06:03,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:06:03,303 INFO L225 Difference]: With dead ends: 12369 [2018-09-10 12:06:03,304 INFO L226 Difference]: Without dead ends: 5198 [2018-09-10 12:06:03,324 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3157 GetRequests, 3085 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=985, Invalid=3437, Unknown=0, NotChecked=0, Total=4422 [2018-09-10 12:06:03,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5198 states. [2018-09-10 12:06:03,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5198 to 4955. [2018-09-10 12:06:03,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4955 states. [2018-09-10 12:06:03,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4955 states to 4955 states and 5335 transitions. [2018-09-10 12:06:03,435 INFO L78 Accepts]: Start accepts. Automaton has 4955 states and 5335 transitions. Word has length 771 [2018-09-10 12:06:03,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:06:03,436 INFO L480 AbstractCegarLoop]: Abstraction has 4955 states and 5335 transitions. [2018-09-10 12:06:03,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-10 12:06:03,436 INFO L276 IsEmpty]: Start isEmpty. Operand 4955 states and 5335 transitions. [2018-09-10 12:06:03,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 843 [2018-09-10 12:06:03,448 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:06:03,449 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 6, 5, 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, 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] [2018-09-10 12:06:03,449 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:06:03,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1023332526, now seen corresponding path program 1 times [2018-09-10 12:06:03,450 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:06:03,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:03,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:03,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:03,451 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:06:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:04,906 WARN L175 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-09-10 12:06:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 785 proven. 845 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2018-09-10 12:06:06,907 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:06:06,907 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:06:06,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:06,915 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:06:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:07,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:06:07,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 1264 proven. 2 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2018-09-10 12:06:07,504 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:06:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 742 proven. 119 refuted. 0 times theorem prover too weak. 1103 trivial. 0 not checked. [2018-09-10 12:06:07,971 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:06:07,971 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 21 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 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:06:07,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:07,987 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:06:08,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:08,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:06:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 1264 proven. 2 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2018-09-10 12:06:08,840 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:06:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 742 proven. 119 refuted. 0 times theorem prover too weak. 1103 trivial. 0 not checked. [2018-09-10 12:06:09,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:06:09,271 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5, 5, 5] total 22 [2018-09-10 12:06:09,271 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:06:09,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-10 12:06:09,273 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-10 12:06:09,273 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2018-09-10 12:06:09,274 INFO L87 Difference]: Start difference. First operand 4955 states and 5335 transitions. Second operand 20 states. [2018-09-10 12:06:21,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:06:21,301 INFO L93 Difference]: Finished difference Result 10426 states and 11335 transitions. [2018-09-10 12:06:21,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-10 12:06:21,302 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 842 [2018-09-10 12:06:21,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:06:21,332 INFO L225 Difference]: With dead ends: 10426 [2018-09-10 12:06:21,332 INFO L226 Difference]: Without dead ends: 5331 [2018-09-10 12:06:21,341 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3496 GetRequests, 3405 SyntacticMatches, 12 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2163 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1017, Invalid=5463, Unknown=0, NotChecked=0, Total=6480 [2018-09-10 12:06:21,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5331 states. [2018-09-10 12:06:21,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5331 to 5076. [2018-09-10 12:06:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5076 states. [2018-09-10 12:06:21,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5076 states to 5076 states and 5400 transitions. [2018-09-10 12:06:21,432 INFO L78 Accepts]: Start accepts. Automaton has 5076 states and 5400 transitions. Word has length 842 [2018-09-10 12:06:21,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:06:21,435 INFO L480 AbstractCegarLoop]: Abstraction has 5076 states and 5400 transitions. [2018-09-10 12:06:21,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-10 12:06:21,435 INFO L276 IsEmpty]: Start isEmpty. Operand 5076 states and 5400 transitions. [2018-09-10 12:06:21,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1100 [2018-09-10 12:06:21,455 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:06:21,456 INFO L376 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, 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, 8, 8, 8, 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, 5, 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, 2, 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] [2018-09-10 12:06:21,457 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:06:21,457 INFO L82 PathProgramCache]: Analyzing trace with hash -2144701740, now seen corresponding path program 1 times [2018-09-10 12:06:21,457 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:06:21,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:21,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:21,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:21,459 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:06:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:22,432 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-10 12:06:22,654 WARN L175 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 13 [2018-09-10 12:06:23,116 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2018-09-10 12:06:23,247 WARN L175 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2018-09-10 12:06:23,408 WARN L175 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2018-09-10 12:06:23,543 WARN L175 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2018-09-10 12:06:23,712 WARN L175 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2018-09-10 12:06:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3758 backedges. 1209 proven. 2383 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2018-09-10 12:06:27,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:06:27,762 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:06:27,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:27,773 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:06:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:28,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:06:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3758 backedges. 1161 proven. 2 refuted. 0 times theorem prover too weak. 2595 trivial. 0 not checked. [2018-09-10 12:06:29,075 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:06:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3758 backedges. 1161 proven. 2 refuted. 0 times theorem prover too weak. 2595 trivial. 0 not checked. [2018-09-10 12:06:30,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:06:30,631 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 23 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 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:06:30,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:30,646 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:06:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:31,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:06:32,875 WARN L175 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2018-09-10 12:06:33,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3758 backedges. 2274 proven. 6 refuted. 0 times theorem prover too weak. 1478 trivial. 0 not checked. [2018-09-10 12:06:33,995 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:06:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3758 backedges. 1528 proven. 271 refuted. 0 times theorem prover too weak. 1959 trivial. 0 not checked. [2018-09-10 12:06:35,126 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:06:35,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 5, 5, 7, 8] total 50 [2018-09-10 12:06:35,128 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:06:35,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-10 12:06:35,130 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-10 12:06:35,131 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2225, Unknown=0, NotChecked=0, Total=2450 [2018-09-10 12:06:35,131 INFO L87 Difference]: Start difference. First operand 5076 states and 5400 transitions. Second operand 37 states. [2018-09-10 12:06:36,891 WARN L175 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 41 [2018-09-10 12:06:37,065 WARN L175 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 30 [2018-09-10 12:06:38,845 WARN L175 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2018-09-10 12:06:39,818 WARN L175 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2018-09-10 12:06:40,141 WARN L175 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2018-09-10 12:06:40,814 WARN L175 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2018-09-10 12:06:41,011 WARN L175 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 34 [2018-09-10 12:06:43,702 WARN L175 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2018-09-10 12:06:45,737 WARN L175 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2018-09-10 12:06:46,246 WARN L175 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 29 [2018-09-10 12:06:47,319 WARN L175 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2018-09-10 12:06:47,712 WARN L175 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2018-09-10 12:06:49,566 WARN L175 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2018-09-10 12:06:51,443 WARN L175 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44 [2018-09-10 12:06:52,111 WARN L175 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2018-09-10 12:06:52,559 WARN L175 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2018-09-10 12:06:53,045 WARN L175 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 27 [2018-09-10 12:06:54,437 WARN L175 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 41 [2018-09-10 12:06:54,869 WARN L175 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2018-09-10 12:06:56,137 WARN L175 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2018-09-10 12:06:56,385 WARN L175 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2018-09-10 12:06:57,468 WARN L175 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2018-09-10 12:07:01,116 WARN L175 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2018-09-10 12:07:01,471 WARN L175 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 26 [2018-09-10 12:07:02,944 WARN L175 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2018-09-10 12:07:03,181 WARN L175 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 30 [2018-09-10 12:07:06,724 WARN L175 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 35 [2018-09-10 12:07:07,584 WARN L175 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2018-09-10 12:07:08,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:07:08,403 INFO L93 Difference]: Finished difference Result 11957 states and 13504 transitions. [2018-09-10 12:07:08,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-10 12:07:08,404 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 1099 [2018-09-10 12:07:08,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:07:08,421 INFO L225 Difference]: With dead ends: 11957 [2018-09-10 12:07:08,421 INFO L226 Difference]: Without dead ends: 6661 [2018-09-10 12:07:08,435 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4584 GetRequests, 4421 SyntacticMatches, 7 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7784 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=3337, Invalid=21469, Unknown=0, NotChecked=0, Total=24806 [2018-09-10 12:07:08,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6661 states. [2018-09-10 12:07:08,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6661 to 5806. [2018-09-10 12:07:08,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5806 states. [2018-09-10 12:07:08,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5806 states to 5806 states and 6161 transitions. [2018-09-10 12:07:08,570 INFO L78 Accepts]: Start accepts. Automaton has 5806 states and 6161 transitions. Word has length 1099 [2018-09-10 12:07:08,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:07:08,571 INFO L480 AbstractCegarLoop]: Abstraction has 5806 states and 6161 transitions. [2018-09-10 12:07:08,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-10 12:07:08,571 INFO L276 IsEmpty]: Start isEmpty. Operand 5806 states and 6161 transitions. [2018-09-10 12:07:08,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1148 [2018-09-10 12:07:08,583 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:07:08,584 INFO L376 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, 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, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:07:08,584 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:07:08,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1115635660, now seen corresponding path program 1 times [2018-09-10 12:07:08,585 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:07:08,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:07:08,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:08,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:07:08,586 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:07:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 1677 proven. 355 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2018-09-10 12:07:10,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:07:10,498 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:07:10,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:10,511 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:07:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:10,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:07:11,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 2463 proven. 6 refuted. 0 times theorem prover too weak. 1526 trivial. 0 not checked. [2018-09-10 12:07:11,341 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:07:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 1677 proven. 359 refuted. 0 times theorem prover too weak. 1959 trivial. 0 not checked. [2018-09-10 12:07:12,474 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:07:12,474 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:07:12,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:12,492 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:07:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:13,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:07:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 2463 proven. 6 refuted. 0 times theorem prover too weak. 1526 trivial. 0 not checked. [2018-09-10 12:07:13,791 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:07:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 1677 proven. 359 refuted. 0 times theorem prover too weak. 1959 trivial. 0 not checked. [2018-09-10 12:07:14,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:07:14,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 8] total 14 [2018-09-10 12:07:14,635 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:07:14,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:07:14,636 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:07:14,636 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-09-10 12:07:14,636 INFO L87 Difference]: Start difference. First operand 5806 states and 6161 transitions. Second operand 9 states. [2018-09-10 12:07:17,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:07:17,223 INFO L93 Difference]: Finished difference Result 12770 states and 13634 transitions. [2018-09-10 12:07:17,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-10 12:07:17,224 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1147 [2018-09-10 12:07:17,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:07:17,246 INFO L225 Difference]: With dead ends: 12770 [2018-09-10 12:07:17,246 INFO L226 Difference]: Without dead ends: 7155 [2018-09-10 12:07:17,261 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4614 GetRequests, 4588 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2018-09-10 12:07:17,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7155 states. [2018-09-10 12:07:17,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7155 to 6535. [2018-09-10 12:07:17,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6535 states. [2018-09-10 12:07:17,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6535 states to 6535 states and 6933 transitions. [2018-09-10 12:07:17,467 INFO L78 Accepts]: Start accepts. Automaton has 6535 states and 6933 transitions. Word has length 1147 [2018-09-10 12:07:17,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:07:17,468 INFO L480 AbstractCegarLoop]: Abstraction has 6535 states and 6933 transitions. [2018-09-10 12:07:17,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:07:17,468 INFO L276 IsEmpty]: Start isEmpty. Operand 6535 states and 6933 transitions. [2018-09-10 12:07:17,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1705 [2018-09-10 12:07:17,507 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:07:17,508 INFO L376 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 8, 8, 8, 8, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:07:17,508 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:07:17,509 INFO L82 PathProgramCache]: Analyzing trace with hash 752859877, now seen corresponding path program 1 times [2018-09-10 12:07:17,509 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:07:17,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:07:17,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:17,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:07:17,510 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:07:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:19,412 WARN L175 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2018-09-10 12:07:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8916 backedges. 1940 proven. 5325 refuted. 0 times theorem prover too weak. 1651 trivial. 0 not checked. [2018-09-10 12:07:24,145 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:07:24,145 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:07:24,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:24,154 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:07:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:24,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:07:25,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8916 backedges. 2874 proven. 85 refuted. 0 times theorem prover too weak. 5957 trivial. 0 not checked. [2018-09-10 12:07:25,898 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:07:26,616 WARN L175 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-10 12:07:29,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8916 backedges. 2950 proven. 122 refuted. 0 times theorem prover too weak. 5844 trivial. 0 not checked. [2018-09-10 12:07:29,387 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:07:29,388 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 27 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 27 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:07:29,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:29,403 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:07:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:30,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:07:31,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8916 backedges. 2874 proven. 85 refuted. 0 times theorem prover too weak. 5957 trivial. 0 not checked. [2018-09-10 12:07:31,819 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:07:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8916 backedges. 2950 proven. 122 refuted. 0 times theorem prover too weak. 5844 trivial. 0 not checked. [2018-09-10 12:07:34,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:07:34,857 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 8, 9, 8, 9] total 39 [2018-09-10 12:07:34,857 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:07:34,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-10 12:07:34,859 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-10 12:07:34,860 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1314, Unknown=0, NotChecked=0, Total=1482 [2018-09-10 12:07:34,860 INFO L87 Difference]: Start difference. First operand 6535 states and 6933 transitions. Second operand 33 states. [2018-09-10 12:07:38,471 WARN L175 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2018-09-10 12:07:38,762 WARN L175 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2018-09-10 12:07:41,597 WARN L175 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2018-09-10 12:07:42,522 WARN L175 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2018-09-10 12:07:43,219 WARN L175 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2018-09-10 12:07:43,698 WARN L175 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 30 [2018-09-10 12:07:47,823 WARN L175 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2018-09-10 12:07:54,211 WARN L175 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2018-09-10 12:07:56,778 WARN L175 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2018-09-10 12:08:01,068 WARN L175 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2018-09-10 12:08:04,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:08:04,170 INFO L93 Difference]: Finished difference Result 14089 states and 14959 transitions. [2018-09-10 12:08:04,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-10 12:08:04,171 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 1704 [2018-09-10 12:08:04,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:08:04,186 INFO L225 Difference]: With dead ends: 14089 [2018-09-10 12:08:04,187 INFO L226 Difference]: Without dead ends: 6845 [2018-09-10 12:08:04,204 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7003 GetRequests, 6852 SyntacticMatches, 6 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6870 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=3440, Invalid=18022, Unknown=0, NotChecked=0, Total=21462 [2018-09-10 12:08:04,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6845 states. [2018-09-10 12:08:04,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6845 to 6023. [2018-09-10 12:08:04,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6023 states. [2018-09-10 12:08:04,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6023 states to 6023 states and 6338 transitions. [2018-09-10 12:08:04,356 INFO L78 Accepts]: Start accepts. Automaton has 6023 states and 6338 transitions. Word has length 1704 [2018-09-10 12:08:04,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:08:04,358 INFO L480 AbstractCegarLoop]: Abstraction has 6023 states and 6338 transitions. [2018-09-10 12:08:04,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-10 12:08:04,358 INFO L276 IsEmpty]: Start isEmpty. Operand 6023 states and 6338 transitions. [2018-09-10 12:08:04,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2219 [2018-09-10 12:08:04,403 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:08:04,404 INFO L376 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 12, 12, 12, 11, 11, 11, 11, 10, 9, 8, 8, 8, 8, 8, 8, 7, 7, 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, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:08:04,404 INFO L423 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:08:04,405 INFO L82 PathProgramCache]: Analyzing trace with hash 765678853, now seen corresponding path program 1 times [2018-09-10 12:08:04,405 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:08:04,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:08:04,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:08:04,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:08:04,406 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:08:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:08:07,910 INFO L134 CoverageAnalysis]: Checked inductivity of 15347 backedges. 6765 proven. 2405 refuted. 0 times theorem prover too weak. 6177 trivial. 0 not checked. [2018-09-10 12:08:07,910 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:08:07,910 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:08:07,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:08:07,918 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:08:08,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:08:08,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:08:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 15347 backedges. 5675 proven. 2 refuted. 0 times theorem prover too weak. 9670 trivial. 0 not checked. [2018-09-10 12:08:10,064 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:08:12,422 INFO L134 CoverageAnalysis]: Checked inductivity of 15347 backedges. 2533 proven. 244 refuted. 0 times theorem prover too weak. 12570 trivial. 0 not checked. [2018-09-10 12:08:12,444 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:08:12,444 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 29 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 29 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:08:12,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:08:12,461 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:08:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:08:13,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:08:16,006 INFO L134 CoverageAnalysis]: Checked inductivity of 15347 backedges. 9907 proven. 30 refuted. 0 times theorem prover too weak. 5410 trivial. 0 not checked. [2018-09-10 12:08:16,006 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:08:20,007 INFO L134 CoverageAnalysis]: Checked inductivity of 15347 backedges. 6779 proven. 1804 refuted. 0 times theorem prover too weak. 6764 trivial. 0 not checked. [2018-09-10 12:08:20,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:08:20,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 11 [2018-09-10 12:08:20,013 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:08:20,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-10 12:08:20,016 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-10 12:08:20,016 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:08:20,017 INFO L87 Difference]: Start difference. First operand 6023 states and 6338 transitions. Second operand 10 states. [2018-09-10 12:08:22,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:08:22,552 INFO L93 Difference]: Finished difference Result 9750 states and 10171 transitions. [2018-09-10 12:08:22,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-10 12:08:22,552 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 2218 [2018-09-10 12:08:22,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:08:22,554 INFO L225 Difference]: With dead ends: 9750 [2018-09-10 12:08:22,554 INFO L226 Difference]: Without dead ends: 0 [2018-09-10 12:08:22,568 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8907 GetRequests, 8869 SyntacticMatches, 21 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2018-09-10 12:08:22,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-09-10 12:08:22,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-09-10 12:08:22,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-09-10 12:08:22,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-09-10 12:08:22,569 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 2218 [2018-09-10 12:08:22,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:08:22,570 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-09-10 12:08:22,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-10 12:08:22,570 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-09-10 12:08:22,570 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-09-10 12:08:22,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-09-10 12:08:22,774 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:08:22,779 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-10 12:08:22,789 WARN L250 erpolLogProxyWrapper]: Already inconsistent. Received shutdown request... [2018-09-10 12:08:22,937 INFO L256 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2018-09-10 12:08:22,939 INFO L168 Benchmark]: Toolchain (without parser) took 233416.77 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -351.1 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-09-10 12:08:22,940 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. [2018-09-10 12:08:22,940 INFO L168 Benchmark]: CACSL2BoogieTranslator took 815.16 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. [2018-09-10 12:08:22,941 INFO L168 Benchmark]: Boogie Procedure Inliner took 143.16 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-10 12:08:22,942 INFO L168 Benchmark]: Boogie Preprocessor took 306.70 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 787.5 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -897.3 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. [2018-09-10 12:08:22,942 INFO L168 Benchmark]: RCFGBuilder took 3759.00 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 136.0 MB). Peak memory consumption was 136.0 MB. Max. memory is 7.1 GB. [2018-09-10 12:08:22,943 INFO L168 Benchmark]: TraceAbstraction took 228384.73 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 1.8 GB in the end (delta: 346.8 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-09-10 12:08:22,951 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 815.16 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 143.16 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 306.70 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 787.5 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -897.3 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3759.00 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 136.0 MB). Peak memory consumption was 136.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 228384.73 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 1.8 GB in the end (delta: 346.8 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 112]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - TimeoutResult: Timeout (de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction) Toolchain cancelled while SimplifyDDAWithTimeout was simplifying term of DAG size 1. RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label45_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_12-08-22-972.csv Completed graceful shutdown