java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label17_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 14:26:55,830 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 14:26:55,832 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 14:26:55,850 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 14:26:55,850 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 14:26:55,852 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 14:26:55,853 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 14:26:55,855 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 14:26:55,856 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 14:26:55,857 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 14:26:55,858 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 14:26:55,858 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 14:26:55,859 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 14:26:55,860 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 14:26:55,862 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 14:26:55,862 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 14:26:55,863 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 14:26:55,865 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 14:26:55,867 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 14:26:55,869 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 14:26:55,870 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 14:26:55,871 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 14:26:55,874 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 14:26:55,874 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 14:26:55,874 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 14:26:55,875 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 14:26:55,876 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 14:26:55,878 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 14:26:55,880 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 14:26:55,881 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 14:26:55,881 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 14:26:55,884 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 14:26:55,884 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 14:26:55,884 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 14:26:55,886 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 14:26:55,887 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 14:26:55,887 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-07-24 14:26:55,904 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 14:26:55,905 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 14:26:55,905 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 14:26:55,906 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 14:26:55,906 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 14:26:55,906 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 14:26:55,906 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 14:26:55,906 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 14:26:55,907 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 14:26:55,907 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 14:26:55,907 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 14:26:55,908 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 14:26:55,908 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 14:26:55,908 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 14:26:55,909 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 14:26:55,909 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 14:26:55,909 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 14:26:55,909 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 14:26:55,909 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 14:26:55,910 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 14:26:55,910 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 14:26:55,910 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 14:26:55,910 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 14:26:55,910 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:26:55,911 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 14:26:55,911 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 14:26:55,911 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 14:26:55,911 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 14:26:55,913 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 14:26:55,913 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 14:26:55,913 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 14:26:55,913 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 14:26:55,913 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 14:26:55,975 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 14:26:55,988 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 14:26:55,992 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 14:26:55,994 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 14:26:55,994 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 14:26:55,995 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label17_true-unreach-call_false-termination.c [2018-07-24 14:26:56,357 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af95a053c/657d8ff2143148c7ac323f344ec2f379/FLAGca18892a0 [2018-07-24 14:26:56,671 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 14:26:56,672 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label17_true-unreach-call_false-termination.c [2018-07-24 14:26:56,688 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af95a053c/657d8ff2143148c7ac323f344ec2f379/FLAGca18892a0 [2018-07-24 14:26:56,715 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af95a053c/657d8ff2143148c7ac323f344ec2f379 [2018-07-24 14:26:56,730 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 14:26:56,732 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 14:26:56,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 14:26:56,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 14:26:56,745 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 14:26:56,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:26:56" (1/1) ... [2018-07-24 14:26:56,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66832ad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:26:56, skipping insertion in model container [2018-07-24 14:26:56,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:26:56" (1/1) ... [2018-07-24 14:26:56,968 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 14:26:57,262 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:26:57,281 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 14:26:57,489 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:26:57,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:26:57 WrapperNode [2018-07-24 14:26:57,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 14:26:57,542 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 14:26:57,542 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 14:26:57,542 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 14:26:57,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:26:57" (1/1) ... [2018-07-24 14:26:57,583 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:26:57" (1/1) ... [2018-07-24 14:26:57,661 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 14:26:57,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 14:26:57,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 14:26:57,662 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 14:26:57,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:26:57" (1/1) ... [2018-07-24 14:26:57,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:26:57" (1/1) ... [2018-07-24 14:26:57,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:26:57" (1/1) ... [2018-07-24 14:26:57,690 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:26:57" (1/1) ... [2018-07-24 14:26:57,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:26:57" (1/1) ... [2018-07-24 14:26:57,960 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:26:57" (1/1) ... [2018-07-24 14:26:57,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:26:57" (1/1) ... [2018-07-24 14:26:57,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 14:26:57,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 14:26:57,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 14:26:57,987 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 14:26:57,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:26:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:26:58,053 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 [2018-07-24 14:26:58,054 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 [2018-07-24 14:26:58,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 14:26:58,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 14:26:58,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 14:26:58,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 14:26:58,054 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 14:26:58,055 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 14:27:01,788 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 14:27:01,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:27:01 BoogieIcfgContainer [2018-07-24 14:27:01,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 14:27:01,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 14:27:01,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 14:27:01,801 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 14:27:01,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 02:26:56" (1/3) ... [2018-07-24 14:27:01,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c5a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:27:01, skipping insertion in model container [2018-07-24 14:27:01,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:26:57" (2/3) ... [2018-07-24 14:27:01,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c5a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:27:01, skipping insertion in model container [2018-07-24 14:27:01,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:27:01" (3/3) ... [2018-07-24 14:27:01,806 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label17_true-unreach-call_false-termination.c [2018-07-24 14:27:01,818 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 14:27:01,827 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 14:27:01,888 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 14:27:01,889 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 14:27:01,889 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 14:27:01,889 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 14:27:01,889 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 14:27:01,889 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 14:27:01,890 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 14:27:01,890 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 14:27:01,890 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 14:27:01,915 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-07-24 14:27:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-07-24 14:27:01,926 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:27:01,927 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:27:01,928 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:27:01,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1045209199, now seen corresponding path program 1 times [2018-07-24 14:27:01,935 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:27:01,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:01,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:01,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:01,981 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:27:02,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:27:02,481 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:27:02,482 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 14:27:02,482 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:27:02,489 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:27:02,505 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:27:02,505 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 14:27:02,508 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-07-24 14:27:04,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:27:04,173 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-07-24 14:27:04,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:27:04,175 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2018-07-24 14:27:04,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:27:04,195 INFO L225 Difference]: With dead ends: 691 [2018-07-24 14:27:04,196 INFO L226 Difference]: Without dead ends: 434 [2018-07-24 14:27:04,204 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 14:27:04,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-07-24 14:27:04,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-07-24 14:27:04,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-07-24 14:27:04,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 755 transitions. [2018-07-24 14:27:04,291 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 755 transitions. Word has length 63 [2018-07-24 14:27:04,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:27:04,292 INFO L471 AbstractCegarLoop]: Abstraction has 434 states and 755 transitions. [2018-07-24 14:27:04,293 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:27:04,293 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 755 transitions. [2018-07-24 14:27:04,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-07-24 14:27:04,302 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:27:04,302 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:27:04,303 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:27:04,303 INFO L82 PathProgramCache]: Analyzing trace with hash -843995874, now seen corresponding path program 1 times [2018-07-24 14:27:04,303 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:27:04,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:04,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:04,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:04,305 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:27:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:04,634 WARN L169 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 14:27:04,720 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:27:04,721 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:27:04,721 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 14:27:04,721 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:27:04,724 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:27:04,724 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:27:04,724 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:27:04,725 INFO L87 Difference]: Start difference. First operand 434 states and 755 transitions. Second operand 6 states. [2018-07-24 14:27:06,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:27:06,925 INFO L93 Difference]: Finished difference Result 1254 states and 2256 transitions. [2018-07-24 14:27:06,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:27:06,925 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2018-07-24 14:27:06,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:27:06,935 INFO L225 Difference]: With dead ends: 1254 [2018-07-24 14:27:06,935 INFO L226 Difference]: Without dead ends: 826 [2018-07-24 14:27:06,941 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:27:06,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2018-07-24 14:27:07,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 812. [2018-07-24 14:27:07,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2018-07-24 14:27:07,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1377 transitions. [2018-07-24 14:27:07,015 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1377 transitions. Word has length 143 [2018-07-24 14:27:07,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:27:07,016 INFO L471 AbstractCegarLoop]: Abstraction has 812 states and 1377 transitions. [2018-07-24 14:27:07,016 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:27:07,017 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1377 transitions. [2018-07-24 14:27:07,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-07-24 14:27:07,025 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:27:07,025 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:27:07,025 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:27:07,026 INFO L82 PathProgramCache]: Analyzing trace with hash 60564827, now seen corresponding path program 1 times [2018-07-24 14:27:07,026 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:27:07,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:07,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:07,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:07,027 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:27:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:07,241 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:27:07,242 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:27:07,242 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:27:07,242 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:27:07,243 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:27:07,243 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:27:07,243 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:27:07,244 INFO L87 Difference]: Start difference. First operand 812 states and 1377 transitions. Second operand 4 states. [2018-07-24 14:27:10,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:27:10,559 INFO L93 Difference]: Finished difference Result 1988 states and 3388 transitions. [2018-07-24 14:27:10,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:27:10,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 176 [2018-07-24 14:27:10,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:27:10,575 INFO L225 Difference]: With dead ends: 1988 [2018-07-24 14:27:10,575 INFO L226 Difference]: Without dead ends: 1182 [2018-07-24 14:27:10,581 INFO L573 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 [2018-07-24 14:27:10,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2018-07-24 14:27:10,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1182. [2018-07-24 14:27:10,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1182 states. [2018-07-24 14:27:10,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1751 transitions. [2018-07-24 14:27:10,642 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1751 transitions. Word has length 176 [2018-07-24 14:27:10,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:27:10,643 INFO L471 AbstractCegarLoop]: Abstraction has 1182 states and 1751 transitions. [2018-07-24 14:27:10,643 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:27:10,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1751 transitions. [2018-07-24 14:27:10,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-07-24 14:27:10,654 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:27:10,655 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:27:10,655 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:27:10,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1677378474, now seen corresponding path program 1 times [2018-07-24 14:27:10,656 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:27:10,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:10,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:10,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:10,657 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:27:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:11,031 WARN L169 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-07-24 14:27:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:27:11,194 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:27:11,194 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-07-24 14:27:11,194 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:27:11,195 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 14:27:11,195 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 14:27:11,195 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-07-24 14:27:11,196 INFO L87 Difference]: Start difference. First operand 1182 states and 1751 transitions. Second operand 7 states. [2018-07-24 14:27:16,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:27:16,530 INFO L93 Difference]: Finished difference Result 3896 states and 6173 transitions. [2018-07-24 14:27:16,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-24 14:27:16,531 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 229 [2018-07-24 14:27:16,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:27:16,559 INFO L225 Difference]: With dead ends: 3896 [2018-07-24 14:27:16,559 INFO L226 Difference]: Without dead ends: 2720 [2018-07-24 14:27:16,575 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2018-07-24 14:27:16,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2018-07-24 14:27:16,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 2606. [2018-07-24 14:27:16,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2606 states. [2018-07-24 14:27:16,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 3634 transitions. [2018-07-24 14:27:16,689 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 3634 transitions. Word has length 229 [2018-07-24 14:27:16,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:27:16,690 INFO L471 AbstractCegarLoop]: Abstraction has 2606 states and 3634 transitions. [2018-07-24 14:27:16,690 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 14:27:16,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 3634 transitions. [2018-07-24 14:27:16,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2018-07-24 14:27:16,710 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:27:16,711 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:27:16,711 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:27:16,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1669722159, now seen corresponding path program 1 times [2018-07-24 14:27:16,712 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:27:16,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:16,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:16,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:16,713 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:27:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 386 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:27:18,435 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:27:18,435 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:27:18,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:18,445 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:27:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:18,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:27:19,590 WARN L169 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-07-24 14:27:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 274 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2018-07-24 14:27:19,776 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:27:20,403 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 168 proven. 210 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-07-24 14:27:20,425 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:27:20,425 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [16, 5] total 20 [2018-07-24 14:27:20,425 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:27:20,426 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:27:20,427 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:27:20,427 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2018-07-24 14:27:20,427 INFO L87 Difference]: Start difference. First operand 2606 states and 3634 transitions. Second operand 5 states. [2018-07-24 14:27:23,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:27:23,938 INFO L93 Difference]: Finished difference Result 8771 states and 12323 transitions. [2018-07-24 14:27:23,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 14:27:23,945 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 438 [2018-07-24 14:27:23,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:27:23,978 INFO L225 Difference]: With dead ends: 8771 [2018-07-24 14:27:23,978 INFO L226 Difference]: Without dead ends: 6171 [2018-07-24 14:27:23,995 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 870 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2018-07-24 14:27:24,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6171 states. [2018-07-24 14:27:24,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6171 to 6094. [2018-07-24 14:27:24,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6094 states. [2018-07-24 14:27:24,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6094 states to 6094 states and 8239 transitions. [2018-07-24 14:27:24,166 INFO L78 Accepts]: Start accepts. Automaton has 6094 states and 8239 transitions. Word has length 438 [2018-07-24 14:27:24,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:27:24,167 INFO L471 AbstractCegarLoop]: Abstraction has 6094 states and 8239 transitions. [2018-07-24 14:27:24,167 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:27:24,167 INFO L276 IsEmpty]: Start isEmpty. Operand 6094 states and 8239 transitions. [2018-07-24 14:27:24,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2018-07-24 14:27:24,197 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:27:24,197 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:27:24,198 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:27:24,198 INFO L82 PathProgramCache]: Analyzing trace with hash 594186879, now seen corresponding path program 1 times [2018-07-24 14:27:24,198 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:27:24,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:24,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:24,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:24,200 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:27:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:24,835 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 14:27:25,402 WARN L169 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2018-07-24 14:27:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 411 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-07-24 14:27:26,839 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:27:26,839 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:27:26,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:26,847 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:27:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:26,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:27:27,704 WARN L169 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-07-24 14:27:28,291 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 301 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2018-07-24 14:27:28,291 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:27:29,301 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 168 proven. 237 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-07-24 14:27:29,322 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:27:29,323 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [19, 6] total 25 [2018-07-24 14:27:29,323 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:27:29,324 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:27:29,324 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:27:29,324 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2018-07-24 14:27:29,324 INFO L87 Difference]: Start difference. First operand 6094 states and 8239 transitions. Second operand 6 states. [2018-07-24 14:27:32,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:27:32,022 INFO L93 Difference]: Finished difference Result 13040 states and 17539 transitions. [2018-07-24 14:27:32,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-24 14:27:32,025 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 462 [2018-07-24 14:27:32,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:27:32,064 INFO L225 Difference]: With dead ends: 13040 [2018-07-24 14:27:32,064 INFO L226 Difference]: Without dead ends: 6952 [2018-07-24 14:27:32,086 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 948 GetRequests, 919 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2018-07-24 14:27:32,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6952 states. [2018-07-24 14:27:32,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6952 to 6889. [2018-07-24 14:27:32,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6889 states. [2018-07-24 14:27:32,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6889 states to 6889 states and 9190 transitions. [2018-07-24 14:27:32,260 INFO L78 Accepts]: Start accepts. Automaton has 6889 states and 9190 transitions. Word has length 462 [2018-07-24 14:27:32,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:27:32,260 INFO L471 AbstractCegarLoop]: Abstraction has 6889 states and 9190 transitions. [2018-07-24 14:27:32,261 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:27:32,261 INFO L276 IsEmpty]: Start isEmpty. Operand 6889 states and 9190 transitions. [2018-07-24 14:27:32,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2018-07-24 14:27:32,304 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:27:32,304 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:27:32,304 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:27:32,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1195688053, now seen corresponding path program 1 times [2018-07-24 14:27:32,305 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:27:32,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:32,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:32,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:32,306 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:27:32,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 317 proven. 399 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-07-24 14:27:33,806 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:27:33,806 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:27:33,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:33,815 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:27:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:34,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:27:34,535 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 559 proven. 53 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2018-07-24 14:27:34,535 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:27:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 239 proven. 477 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-07-24 14:27:35,479 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:27:35,479 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:27:35,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:35,495 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:27:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:35,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:27:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 559 proven. 53 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2018-07-24 14:27:36,637 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:27:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 239 proven. 477 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-07-24 14:27:37,813 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:27:37,814 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9, 8, 8] total 34 [2018-07-24 14:27:37,814 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:27:37,815 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-24 14:27:37,815 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-24 14:27:37,816 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2018-07-24 14:27:37,816 INFO L87 Difference]: Start difference. First operand 6889 states and 9190 transitions. Second operand 19 states. [2018-07-24 14:27:43,796 WARN L169 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2018-07-24 14:27:49,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:27:49,940 INFO L93 Difference]: Finished difference Result 14720 states and 19923 transitions. [2018-07-24 14:27:49,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-24 14:27:49,941 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 547 [2018-07-24 14:27:49,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:27:49,974 INFO L225 Difference]: With dead ends: 14720 [2018-07-24 14:27:49,975 INFO L226 Difference]: Without dead ends: 7624 [2018-07-24 14:27:50,001 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2250 GetRequests, 2188 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=789, Invalid=2871, Unknown=0, NotChecked=0, Total=3660 [2018-07-24 14:27:50,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7624 states. [2018-07-24 14:27:50,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7624 to 7238. [2018-07-24 14:27:50,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7238 states. [2018-07-24 14:27:50,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7238 states to 7238 states and 8844 transitions. [2018-07-24 14:27:50,168 INFO L78 Accepts]: Start accepts. Automaton has 7238 states and 8844 transitions. Word has length 547 [2018-07-24 14:27:50,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:27:50,168 INFO L471 AbstractCegarLoop]: Abstraction has 7238 states and 8844 transitions. [2018-07-24 14:27:50,168 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-24 14:27:50,168 INFO L276 IsEmpty]: Start isEmpty. Operand 7238 states and 8844 transitions. [2018-07-24 14:27:50,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2018-07-24 14:27:50,203 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:27:50,203 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:27:50,204 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:27:50,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1329520345, now seen corresponding path program 1 times [2018-07-24 14:27:50,204 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:27:50,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:50,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:50,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:50,205 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:27:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:51,021 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 14:27:51,256 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 456 proven. 112 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-07-24 14:27:51,256 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:27:51,256 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:27:51,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:51,265 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:27:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:51,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:27:51,586 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 723 proven. 2 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2018-07-24 14:27:51,586 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:27:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 456 proven. 112 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-07-24 14:27:52,132 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:27:52,132 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:27:52,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:52,148 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:27:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:52,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:27:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 717 proven. 8 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2018-07-24 14:27:52,991 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:27:53,175 WARN L169 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2018-07-24 14:27:53,902 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 456 proven. 112 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-07-24 14:27:53,904 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:27:53,904 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 8, 5] total 16 [2018-07-24 14:27:53,904 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:27:53,905 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 14:27:53,905 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 14:27:53,905 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-07-24 14:27:53,906 INFO L87 Difference]: Start difference. First operand 7238 states and 8844 transitions. Second operand 7 states. [2018-07-24 14:27:56,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:27:56,432 INFO L93 Difference]: Finished difference Result 17461 states and 21695 transitions. [2018-07-24 14:27:56,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 14:27:56,432 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 549 [2018-07-24 14:27:56,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:27:56,479 INFO L225 Difference]: With dead ends: 17461 [2018-07-24 14:27:56,479 INFO L226 Difference]: Without dead ends: 10412 [2018-07-24 14:27:56,500 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2216 GetRequests, 2185 SyntacticMatches, 12 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2018-07-24 14:27:56,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10412 states. [2018-07-24 14:27:56,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10412 to 10251. [2018-07-24 14:27:56,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10251 states. [2018-07-24 14:27:56,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10251 states to 10251 states and 11826 transitions. [2018-07-24 14:27:56,693 INFO L78 Accepts]: Start accepts. Automaton has 10251 states and 11826 transitions. Word has length 549 [2018-07-24 14:27:56,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:27:56,694 INFO L471 AbstractCegarLoop]: Abstraction has 10251 states and 11826 transitions. [2018-07-24 14:27:56,694 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 14:27:56,694 INFO L276 IsEmpty]: Start isEmpty. Operand 10251 states and 11826 transitions. [2018-07-24 14:27:56,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2018-07-24 14:27:56,747 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:27:56,747 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:27:56,748 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:27:56,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1289771895, now seen corresponding path program 1 times [2018-07-24 14:27:56,748 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:27:56,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:56,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:56,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:56,749 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:27:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:57,341 WARN L169 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 14:27:57,626 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2018-07-24 14:27:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 343 proven. 451 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-07-24 14:27:58,319 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:27:58,319 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:27:58,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:58,327 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:27:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:58,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:27:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 688 proven. 2 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2018-07-24 14:27:58,883 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:27:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 235 proven. 559 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-07-24 14:27:59,851 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:27:59,852 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 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 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:27:59,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:59,867 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:28:00,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:00,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:01,391 WARN L169 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 14:28:02,167 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 665 proven. 25 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2018-07-24 14:28:02,168 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:02,401 WARN L169 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2018-07-24 14:28:02,640 WARN L169 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2018-07-24 14:28:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 237 proven. 557 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-07-24 14:28:04,382 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:28:04,382 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8, 10, 11] total 40 [2018-07-24 14:28:04,383 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:28:04,384 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-24 14:28:04,385 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-24 14:28:04,385 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2018-07-24 14:28:04,385 INFO L87 Difference]: Start difference. First operand 10251 states and 11826 transitions. Second operand 19 states. [2018-07-24 14:28:06,498 WARN L169 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2018-07-24 14:28:07,559 WARN L169 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2018-07-24 14:28:08,230 WARN L169 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-07-24 14:28:12,327 WARN L169 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2018-07-24 14:28:13,116 WARN L169 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-07-24 14:28:13,596 WARN L169 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2018-07-24 14:28:19,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:28:19,137 INFO L93 Difference]: Finished difference Result 22570 states and 26472 transitions. [2018-07-24 14:28:19,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-24 14:28:19,137 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 573 [2018-07-24 14:28:19,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:28:19,171 INFO L225 Difference]: With dead ends: 22570 [2018-07-24 14:28:19,171 INFO L226 Difference]: Without dead ends: 12508 [2018-07-24 14:28:19,201 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2369 GetRequests, 2296 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=913, Invalid=4343, Unknown=0, NotChecked=0, Total=5256 [2018-07-24 14:28:19,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12508 states. [2018-07-24 14:28:19,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12508 to 11954. [2018-07-24 14:28:19,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11954 states. [2018-07-24 14:28:19,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11954 states to 11954 states and 13615 transitions. [2018-07-24 14:28:19,416 INFO L78 Accepts]: Start accepts. Automaton has 11954 states and 13615 transitions. Word has length 573 [2018-07-24 14:28:19,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:28:19,417 INFO L471 AbstractCegarLoop]: Abstraction has 11954 states and 13615 transitions. [2018-07-24 14:28:19,417 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-24 14:28:19,417 INFO L276 IsEmpty]: Start isEmpty. Operand 11954 states and 13615 transitions. [2018-07-24 14:28:19,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2018-07-24 14:28:19,451 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:28:19,452 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:28:19,452 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:28:19,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1547925191, now seen corresponding path program 1 times [2018-07-24 14:28:19,454 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:28:19,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:19,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:19,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:19,455 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:28:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:20,041 WARN L169 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-07-24 14:28:21,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 611 proven. 482 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2018-07-24 14:28:21,068 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:21,068 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-07-24 14:28:21,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:21,077 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:28:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:21,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 952 proven. 2 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2018-07-24 14:28:21,724 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:21,965 WARN L169 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-07-24 14:28:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 605 proven. 112 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2018-07-24 14:28:22,545 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:22,545 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-07-24 14:28:22,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:22,562 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:28:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:23,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 744 proven. 210 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2018-07-24 14:28:23,779 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:24,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 316 proven. 690 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-07-24 14:28:24,886 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:28:24,887 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 8, 8] total 16 [2018-07-24 14:28:24,888 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:28:24,889 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 14:28:24,890 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 14:28:24,890 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2018-07-24 14:28:24,890 INFO L87 Difference]: Start difference. First operand 11954 states and 13615 transitions. Second operand 13 states. [2018-07-24 14:28:28,746 WARN L169 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-07-24 14:28:28,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:28:28,934 INFO L93 Difference]: Finished difference Result 22792 states and 26590 transitions. [2018-07-24 14:28:28,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-24 14:28:28,934 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 634 [2018-07-24 14:28:28,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:28:28,979 INFO L225 Difference]: With dead ends: 22792 [2018-07-24 14:28:28,979 INFO L226 Difference]: Without dead ends: 10635 [2018-07-24 14:28:29,008 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2566 GetRequests, 2525 SyntacticMatches, 17 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2018-07-24 14:28:29,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10635 states. [2018-07-24 14:28:29,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10635 to 9929. [2018-07-24 14:28:29,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9929 states. [2018-07-24 14:28:29,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9929 states to 9929 states and 11182 transitions. [2018-07-24 14:28:29,197 INFO L78 Accepts]: Start accepts. Automaton has 9929 states and 11182 transitions. Word has length 634 [2018-07-24 14:28:29,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:28:29,198 INFO L471 AbstractCegarLoop]: Abstraction has 9929 states and 11182 transitions. [2018-07-24 14:28:29,198 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 14:28:29,198 INFO L276 IsEmpty]: Start isEmpty. Operand 9929 states and 11182 transitions. [2018-07-24 14:28:29,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 661 [2018-07-24 14:28:29,217 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:28:29,217 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:28:29,218 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:28:29,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1467186075, now seen corresponding path program 2 times [2018-07-24 14:28:29,218 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:28:29,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:29,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:29,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:29,219 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:28:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:29,906 WARN L169 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-07-24 14:28:30,118 WARN L169 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-07-24 14:28:30,355 WARN L169 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 14:28:30,714 WARN L169 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-07-24 14:28:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 637 proven. 534 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2018-07-24 14:28:31,767 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:31,767 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-07-24 14:28:31,775 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 14:28:31,775 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 14:28:31,990 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 14:28:31,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 14:28:31,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:32,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 1004 proven. 2 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2018-07-24 14:28:32,448 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:32,725 WARN L169 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-07-24 14:28:32,846 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-07-24 14:28:33,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 631 proven. 112 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2018-07-24 14:28:33,825 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:33,825 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-07-24 14:28:33,841 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 14:28:33,841 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 14:28:34,309 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 14:28:34,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 14:28:34,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 989 proven. 17 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2018-07-24 14:28:35,336 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:35,680 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-07-24 14:28:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 310 proven. 748 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-07-24 14:28:37,685 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:28:37,685 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5, 10, 11] total 31 [2018-07-24 14:28:37,686 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:28:37,687 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-24 14:28:37,687 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-24 14:28:37,688 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2018-07-24 14:28:37,688 INFO L87 Difference]: Start difference. First operand 9929 states and 11182 transitions. Second operand 18 states. [2018-07-24 14:28:41,203 WARN L169 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2018-07-24 14:28:42,937 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2018-07-24 14:28:43,387 WARN L169 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2018-07-24 14:28:43,661 WARN L169 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2018-07-24 14:28:47,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:28:47,447 INFO L93 Difference]: Finished difference Result 22398 states and 25953 transitions. [2018-07-24 14:28:47,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-24 14:28:47,447 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 660 [2018-07-24 14:28:47,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:28:47,477 INFO L225 Difference]: With dead ends: 22398 [2018-07-24 14:28:47,478 INFO L226 Difference]: Without dead ends: 12658 [2018-07-24 14:28:47,510 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2717 GetRequests, 2638 SyntacticMatches, 14 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=812, Invalid=3610, Unknown=0, NotChecked=0, Total=4422 [2018-07-24 14:28:47,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12658 states. [2018-07-24 14:28:47,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12658 to 12159. [2018-07-24 14:28:47,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12159 states. [2018-07-24 14:28:47,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12159 states to 12159 states and 13585 transitions. [2018-07-24 14:28:47,724 INFO L78 Accepts]: Start accepts. Automaton has 12159 states and 13585 transitions. Word has length 660 [2018-07-24 14:28:47,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:28:47,725 INFO L471 AbstractCegarLoop]: Abstraction has 12159 states and 13585 transitions. [2018-07-24 14:28:47,725 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-24 14:28:47,726 INFO L276 IsEmpty]: Start isEmpty. Operand 12159 states and 13585 transitions. [2018-07-24 14:28:47,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2018-07-24 14:28:47,751 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:28:47,751 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:28:47,752 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:28:47,752 INFO L82 PathProgramCache]: Analyzing trace with hash 789375800, now seen corresponding path program 1 times [2018-07-24 14:28:47,752 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:28:47,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:47,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 14:28:47,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:47,753 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:28:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:48,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2017 backedges. 706 proven. 224 refuted. 0 times theorem prover too weak. 1087 trivial. 0 not checked. [2018-07-24 14:28:48,689 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:48,689 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-07-24 14:28:48,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:48,696 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:28:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:48,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2017 backedges. 1463 proven. 2 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2018-07-24 14:28:49,318 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2017 backedges. 706 proven. 224 refuted. 0 times theorem prover too weak. 1087 trivial. 0 not checked. [2018-07-24 14:28:49,712 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:49,712 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-07-24 14:28:49,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:49,728 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:28:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:50,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2017 backedges. 1463 proven. 2 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2018-07-24 14:28:50,540 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2017 backedges. 706 proven. 224 refuted. 0 times theorem prover too weak. 1087 trivial. 0 not checked. [2018-07-24 14:28:50,882 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:28:50,882 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-07-24 14:28:50,882 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:28:50,883 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 14:28:50,884 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 14:28:50,884 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:28:50,884 INFO L87 Difference]: Start difference. First operand 12159 states and 13585 transitions. Second operand 7 states. [2018-07-24 14:28:54,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:28:54,366 INFO L93 Difference]: Finished difference Result 31646 states and 39955 transitions. [2018-07-24 14:28:54,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-24 14:28:54,367 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 782 [2018-07-24 14:28:54,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:28:54,466 INFO L225 Difference]: With dead ends: 31646 [2018-07-24 14:28:54,466 INFO L226 Difference]: Without dead ends: 19676 [2018-07-24 14:28:54,552 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3144 GetRequests, 3129 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-07-24 14:28:54,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19676 states. [2018-07-24 14:28:54,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19676 to 19222. [2018-07-24 14:28:54,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19222 states. [2018-07-24 14:28:55,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19222 states to 19222 states and 22018 transitions. [2018-07-24 14:28:55,049 INFO L78 Accepts]: Start accepts. Automaton has 19222 states and 22018 transitions. Word has length 782 [2018-07-24 14:28:55,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:28:55,050 INFO L471 AbstractCegarLoop]: Abstraction has 19222 states and 22018 transitions. [2018-07-24 14:28:55,050 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 14:28:55,050 INFO L276 IsEmpty]: Start isEmpty. Operand 19222 states and 22018 transitions. [2018-07-24 14:28:55,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 824 [2018-07-24 14:28:55,084 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:28:55,085 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:28:55,085 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:28:55,086 INFO L82 PathProgramCache]: Analyzing trace with hash -119539882, now seen corresponding path program 1 times [2018-07-24 14:28:55,086 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:28:55,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:55,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:55,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:55,088 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:28:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:55,873 WARN L169 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2018-07-24 14:28:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 929 proven. 835 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2018-07-24 14:28:56,960 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:56,960 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-07-24 14:28:56,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:56,972 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:28:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:57,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 1443 proven. 2 refuted. 0 times theorem prover too weak. 918 trivial. 0 not checked. [2018-07-24 14:28:57,605 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 917 proven. 112 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2018-07-24 14:28:58,684 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:58,684 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-07-24 14:28:58,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:58,705 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:28:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:59,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 1435 proven. 10 refuted. 0 times theorem prover too weak. 918 trivial. 0 not checked. [2018-07-24 14:28:59,787 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:59,970 WARN L169 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2018-07-24 14:29:01,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 422 proven. 1075 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2018-07-24 14:29:01,474 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:29:01,476 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 8, 8] total 28 [2018-07-24 14:29:01,476 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:29:01,477 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-24 14:29:01,477 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-24 14:29:01,478 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2018-07-24 14:29:01,478 INFO L87 Difference]: Start difference. First operand 19222 states and 22018 transitions. Second operand 17 states. [2018-07-24 14:29:03,132 WARN L169 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2018-07-24 14:29:10,273 WARN L169 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2018-07-24 14:29:10,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:29:10,559 INFO L93 Difference]: Finished difference Result 38485 states and 45953 transitions. [2018-07-24 14:29:10,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-24 14:29:10,560 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 823 [2018-07-24 14:29:10,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:29:10,645 INFO L225 Difference]: With dead ends: 38485 [2018-07-24 14:29:10,646 INFO L226 Difference]: Without dead ends: 18668 [2018-07-24 14:29:10,710 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3375 GetRequests, 3297 SyntacticMatches, 8 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1098, Invalid=4014, Unknown=0, NotChecked=0, Total=5112 [2018-07-24 14:29:10,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18668 states. [2018-07-24 14:29:11,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18668 to 18137. [2018-07-24 14:29:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18137 states. [2018-07-24 14:29:11,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18137 states to 18137 states and 20248 transitions. [2018-07-24 14:29:11,146 INFO L78 Accepts]: Start accepts. Automaton has 18137 states and 20248 transitions. Word has length 823 [2018-07-24 14:29:11,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:29:11,147 INFO L471 AbstractCegarLoop]: Abstraction has 18137 states and 20248 transitions. [2018-07-24 14:29:11,147 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-24 14:29:11,147 INFO L276 IsEmpty]: Start isEmpty. Operand 18137 states and 20248 transitions. [2018-07-24 14:29:11,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 975 [2018-07-24 14:29:11,192 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:29:11,193 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:29:11,193 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:29:11,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1073901905, now seen corresponding path program 1 times [2018-07-24 14:29:11,194 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:29:11,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:29:11,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:11,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:29:11,195 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:29:11,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:12,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2684 backedges. 938 proven. 228 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2018-07-24 14:29:12,370 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:29:12,370 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-07-24 14:29:12,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:12,379 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:29:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:12,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:29:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2684 backedges. 1827 proven. 2 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2018-07-24 14:29:13,036 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:29:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2684 backedges. 938 proven. 228 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2018-07-24 14:29:13,685 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:29:13,686 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-07-24 14:29:13,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:13,701 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:29:14,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:14,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:29:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2684 backedges. 1827 proven. 2 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2018-07-24 14:29:14,718 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:29:15,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2684 backedges. 938 proven. 228 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2018-07-24 14:29:15,363 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:29:15,364 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-07-24 14:29:15,364 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:29:15,367 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 14:29:15,367 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 14:29:15,367 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:29:15,370 INFO L87 Difference]: Start difference. First operand 18137 states and 20248 transitions. Second operand 7 states. [2018-07-24 14:29:18,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:29:18,070 INFO L93 Difference]: Finished difference Result 37432 states and 42025 transitions. [2018-07-24 14:29:18,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-24 14:29:18,070 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 974 [2018-07-24 14:29:18,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:29:18,126 INFO L225 Difference]: With dead ends: 37432 [2018-07-24 14:29:18,126 INFO L226 Difference]: Without dead ends: 19484 [2018-07-24 14:29:18,171 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3911 GetRequests, 3896 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-07-24 14:29:18,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19484 states. [2018-07-24 14:29:18,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19484 to 19315. [2018-07-24 14:29:18,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19315 states. [2018-07-24 14:29:18,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19315 states to 19315 states and 21328 transitions. [2018-07-24 14:29:18,526 INFO L78 Accepts]: Start accepts. Automaton has 19315 states and 21328 transitions. Word has length 974 [2018-07-24 14:29:18,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:29:18,527 INFO L471 AbstractCegarLoop]: Abstraction has 19315 states and 21328 transitions. [2018-07-24 14:29:18,527 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 14:29:18,528 INFO L276 IsEmpty]: Start isEmpty. Operand 19315 states and 21328 transitions. [2018-07-24 14:29:18,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1031 [2018-07-24 14:29:18,577 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:29:18,578 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:29:18,578 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:29:18,579 INFO L82 PathProgramCache]: Analyzing trace with hash -2115081840, now seen corresponding path program 1 times [2018-07-24 14:29:18,579 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:29:18,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:29:18,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:18,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:29:18,580 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:29:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:19,412 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 14:29:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3268 backedges. 1047 proven. 1376 refuted. 0 times theorem prover too weak. 845 trivial. 0 not checked. [2018-07-24 14:29:21,592 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:29:21,592 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-07-24 14:29:21,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:21,601 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:29:21,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:21,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:29:22,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3268 backedges. 2086 proven. 2 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2018-07-24 14:29:22,657 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:29:22,922 WARN L169 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 17 [2018-07-24 14:29:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3268 backedges. 1063 proven. 228 refuted. 0 times theorem prover too weak. 1977 trivial. 0 not checked. [2018-07-24 14:29:23,639 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:29:23,639 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-07-24 14:29:23,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:23,662 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:29:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:24,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:29:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3268 backedges. 2081 proven. 25 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2018-07-24 14:29:24,889 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:29:25,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3268 backedges. 1063 proven. 228 refuted. 0 times theorem prover too weak. 1977 trivial. 0 not checked. [2018-07-24 14:29:25,897 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:29:25,898 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6, 5, 5] total 22 [2018-07-24 14:29:25,898 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:29:25,900 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-24 14:29:25,901 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-24 14:29:25,901 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2018-07-24 14:29:25,901 INFO L87 Difference]: Start difference. First operand 19315 states and 21328 transitions. Second operand 17 states. [2018-07-24 14:29:29,781 WARN L169 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2018-07-24 14:29:30,620 WARN L169 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2018-07-24 14:29:31,033 WARN L169 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2018-07-24 14:29:35,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:29:35,665 INFO L93 Difference]: Finished difference Result 39157 states and 44549 transitions. [2018-07-24 14:29:35,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-24 14:29:35,666 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1030 [2018-07-24 14:29:35,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:29:35,728 INFO L225 Difference]: With dead ends: 39157 [2018-07-24 14:29:35,729 INFO L226 Difference]: Without dead ends: 20031 [2018-07-24 14:29:35,783 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4211 GetRequests, 4146 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=969, Invalid=3453, Unknown=0, NotChecked=0, Total=4422 [2018-07-24 14:29:35,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20031 states. [2018-07-24 14:29:36,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20031 to 19388. [2018-07-24 14:29:36,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19388 states. [2018-07-24 14:29:36,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19388 states to 19388 states and 21038 transitions. [2018-07-24 14:29:36,200 INFO L78 Accepts]: Start accepts. Automaton has 19388 states and 21038 transitions. Word has length 1030 [2018-07-24 14:29:36,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:29:36,201 INFO L471 AbstractCegarLoop]: Abstraction has 19388 states and 21038 transitions. [2018-07-24 14:29:36,201 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-24 14:29:36,201 INFO L276 IsEmpty]: Start isEmpty. Operand 19388 states and 21038 transitions. [2018-07-24 14:29:36,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1152 [2018-07-24 14:29:36,241 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:29:36,242 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:29:36,242 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:29:36,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1223734884, now seen corresponding path program 1 times [2018-07-24 14:29:36,243 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:29:36,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:29:36,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:36,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:29:36,246 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:29:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4002 backedges. 1708 proven. 230 refuted. 0 times theorem prover too weak. 2064 trivial. 0 not checked. [2018-07-24 14:29:37,776 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:29:37,776 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-07-24 14:29:37,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:37,784 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:29:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:38,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:29:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4002 backedges. 2498 proven. 6 refuted. 0 times theorem prover too weak. 1498 trivial. 0 not checked. [2018-07-24 14:29:38,789 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:29:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4002 backedges. 1708 proven. 303 refuted. 0 times theorem prover too weak. 1991 trivial. 0 not checked. [2018-07-24 14:29:39,833 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:29:39,834 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-07-24 14:29:39,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:39,853 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:29:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:40,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:29:41,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4002 backedges. 2498 proven. 6 refuted. 0 times theorem prover too weak. 1498 trivial. 0 not checked. [2018-07-24 14:29:41,378 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:29:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4002 backedges. 1708 proven. 303 refuted. 0 times theorem prover too weak. 1991 trivial. 0 not checked. [2018-07-24 14:29:42,152 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:29:42,153 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 7, 8] total 15 [2018-07-24 14:29:42,153 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:29:42,154 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:29:42,155 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:29:42,155 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-07-24 14:29:42,155 INFO L87 Difference]: Start difference. First operand 19388 states and 21038 transitions. Second operand 9 states. [2018-07-24 14:29:46,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:29:46,171 INFO L93 Difference]: Finished difference Result 40954 states and 44558 transitions. [2018-07-24 14:29:46,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-24 14:29:46,171 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1151 [2018-07-24 14:29:46,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:29:46,217 INFO L225 Difference]: With dead ends: 40954 [2018-07-24 14:29:46,217 INFO L226 Difference]: Without dead ends: 21755 [2018-07-24 14:29:46,241 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4620 GetRequests, 4600 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2018-07-24 14:29:46,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21755 states. [2018-07-24 14:29:46,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21755 to 21072. [2018-07-24 14:29:46,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21072 states. [2018-07-24 14:29:46,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21072 states to 21072 states and 22912 transitions. [2018-07-24 14:29:46,707 INFO L78 Accepts]: Start accepts. Automaton has 21072 states and 22912 transitions. Word has length 1151 [2018-07-24 14:29:46,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:29:46,708 INFO L471 AbstractCegarLoop]: Abstraction has 21072 states and 22912 transitions. [2018-07-24 14:29:46,708 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:29:46,708 INFO L276 IsEmpty]: Start isEmpty. Operand 21072 states and 22912 transitions. [2018-07-24 14:29:46,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1509 [2018-07-24 14:29:46,767 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:29:46,768 INFO L353 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 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, 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, 8, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:29:46,769 INFO L414 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:29:46,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1808970433, now seen corresponding path program 1 times [2018-07-24 14:29:46,769 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:29:46,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:29:46,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:46,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:29:46,770 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:29:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:47,614 WARN L169 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-07-24 14:29:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6605 backedges. 1316 proven. 3763 refuted. 0 times theorem prover too weak. 1526 trivial. 0 not checked. [2018-07-24 14:29:52,137 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:29:52,137 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-07-24 14:29:52,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:52,146 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:29:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:52,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:29:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6605 backedges. 4013 proven. 2 refuted. 0 times theorem prover too weak. 2590 trivial. 0 not checked. [2018-07-24 14:29:53,515 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:29:53,931 WARN L169 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-07-24 14:29:54,244 WARN L169 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-07-24 14:29:54,959 WARN L169 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2018-07-24 14:29:55,198 WARN L169 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-07-24 14:29:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6605 backedges. 1517 proven. 388 refuted. 0 times theorem prover too weak. 4700 trivial. 0 not checked. [2018-07-24 14:29:56,841 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:29:56,842 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-07-24 14:29:56,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:56,859 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:29:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:57,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:30:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6605 backedges. 4664 proven. 24 refuted. 0 times theorem prover too weak. 1917 trivial. 0 not checked. [2018-07-24 14:30:00,959 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:30:01,113 WARN L169 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2018-07-24 14:30:01,269 WARN L169 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2018-07-24 14:30:01,421 WARN L169 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2018-07-24 14:30:01,571 WARN L169 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-07-24 14:30:02,264 WARN L169 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2018-07-24 14:30:02,960 WARN L169 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-07-24 14:30:03,114 WARN L169 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-07-24 14:30:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6605 backedges. 787 proven. 4057 refuted. 0 times theorem prover too weak. 1761 trivial. 0 not checked. [2018-07-24 14:30:07,868 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:30:07,869 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5, 13, 14] total 42 [2018-07-24 14:30:07,869 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:30:07,871 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-24 14:30:07,871 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-24 14:30:07,872 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1482, Unknown=0, NotChecked=0, Total=1722 [2018-07-24 14:30:07,872 INFO L87 Difference]: Start difference. First operand 21072 states and 22912 transitions. Second operand 19 states. [2018-07-24 14:30:18,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:30:18,271 INFO L93 Difference]: Finished difference Result 39658 states and 43397 transitions. [2018-07-24 14:30:18,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-24 14:30:18,272 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1508 [2018-07-24 14:30:18,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:30:18,305 INFO L225 Difference]: With dead ends: 39658 [2018-07-24 14:30:18,305 INFO L226 Difference]: Without dead ends: 18775 [2018-07-24 14:30:18,341 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6131 GetRequests, 6040 SyntacticMatches, 8 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1009, Invalid=6131, Unknown=0, NotChecked=0, Total=7140 [2018-07-24 14:30:18,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18775 states. [2018-07-24 14:30:18,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18775 to 18602. [2018-07-24 14:30:18,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18602 states. [2018-07-24 14:30:18,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18602 states to 18602 states and 19902 transitions. [2018-07-24 14:30:18,598 INFO L78 Accepts]: Start accepts. Automaton has 18602 states and 19902 transitions. Word has length 1508 [2018-07-24 14:30:18,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:30:18,599 INFO L471 AbstractCegarLoop]: Abstraction has 18602 states and 19902 transitions. [2018-07-24 14:30:18,599 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-24 14:30:18,599 INFO L276 IsEmpty]: Start isEmpty. Operand 18602 states and 19902 transitions. [2018-07-24 14:30:18,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1628 [2018-07-24 14:30:18,628 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:30:18,629 INFO L353 BasicCegarLoop]: trace histogram [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, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 7, 7, 7, 7, 7, 6, 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, 3, 3, 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] [2018-07-24 14:30:18,629 INFO L414 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:30:18,630 INFO L82 PathProgramCache]: Analyzing trace with hash 459790037, now seen corresponding path program 1 times [2018-07-24 14:30:18,630 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:30:18,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:18,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:18,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:18,631 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:30:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7867 backedges. 1796 proven. 1168 refuted. 0 times theorem prover too weak. 4903 trivial. 0 not checked. [2018-07-24 14:30:22,416 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:30:22,417 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-07-24 14:30:22,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:22,424 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:30:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:22,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:30:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7867 backedges. 3025 proven. 2 refuted. 0 times theorem prover too weak. 4840 trivial. 0 not checked. [2018-07-24 14:30:24,057 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:30:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7867 backedges. 1805 proven. 112 refuted. 0 times theorem prover too weak. 5950 trivial. 0 not checked. [2018-07-24 14:30:26,121 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:30:26,121 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-07-24 14:30:26,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:26,137 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:30:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:27,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:30:29,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7867 backedges. 3007 proven. 20 refuted. 0 times theorem prover too weak. 4840 trivial. 0 not checked. [2018-07-24 14:30:29,144 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:30:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7867 backedges. 799 proven. 2280 refuted. 0 times theorem prover too weak. 4788 trivial. 0 not checked. [2018-07-24 14:30:33,505 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:30:33,506 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 8, 8] total 30 [2018-07-24 14:30:33,506 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:30:33,508 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-24 14:30:33,508 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-24 14:30:33,508 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2018-07-24 14:30:33,508 INFO L87 Difference]: Start difference. First operand 18602 states and 19902 transitions. Second operand 17 states. [2018-07-24 14:30:41,801 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2018-07-24 14:30:43,099 WARN L169 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2018-07-24 14:30:43,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:30:43,289 INFO L93 Difference]: Finished difference Result 37066 states and 39727 transitions. [2018-07-24 14:30:43,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-24 14:30:43,290 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1627 [2018-07-24 14:30:43,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:30:43,319 INFO L225 Difference]: With dead ends: 37066 [2018-07-24 14:30:43,319 INFO L226 Difference]: Without dead ends: 18840 [2018-07-24 14:30:43,343 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6591 GetRequests, 6520 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=776, Invalid=4194, Unknown=0, NotChecked=0, Total=4970 [2018-07-24 14:30:43,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18840 states. [2018-07-24 14:30:43,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18840 to 18591. [2018-07-24 14:30:43,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18591 states. [2018-07-24 14:30:43,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18591 states to 18591 states and 19820 transitions. [2018-07-24 14:30:43,576 INFO L78 Accepts]: Start accepts. Automaton has 18591 states and 19820 transitions. Word has length 1627 [2018-07-24 14:30:43,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:30:43,577 INFO L471 AbstractCegarLoop]: Abstraction has 18591 states and 19820 transitions. [2018-07-24 14:30:43,577 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-24 14:30:43,578 INFO L276 IsEmpty]: Start isEmpty. Operand 18591 states and 19820 transitions. [2018-07-24 14:30:43,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1847 [2018-07-24 14:30:43,618 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:30:43,618 INFO L353 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 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, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 9, 9, 8, 7, 7, 7, 7, 6, 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, 3, 3, 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, 1] [2018-07-24 14:30:43,618 INFO L414 AbstractCegarLoop]: === Iteration 19 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:30:43,619 INFO L82 PathProgramCache]: Analyzing trace with hash 284852854, now seen corresponding path program 1 times [2018-07-24 14:30:43,619 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:30:43,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:43,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:43,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:43,620 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:30:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10584 backedges. 2179 proven. 2489 refuted. 0 times theorem prover too weak. 5916 trivial. 0 not checked. [2018-07-24 14:30:48,017 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:30:48,017 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-07-24 14:30:48,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:48,029 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:30:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:48,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-07-24 14:30:48,591 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-07-24 14:30:48,793 WARN L512 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:30:48,793 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 14:30:48,799 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 14:30:48,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 02:30:48 BoogieIcfgContainer [2018-07-24 14:30:48,800 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 14:30:48,801 INFO L168 Benchmark]: Toolchain (without parser) took 232070.10 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -413.4 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-07-24 14:30:48,802 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 14:30:48,802 INFO L168 Benchmark]: CACSL2BoogieTranslator took 806.51 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: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2018-07-24 14:30:48,803 INFO L168 Benchmark]: Boogie Procedure Inliner took 119.03 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. [2018-07-24 14:30:48,803 INFO L168 Benchmark]: Boogie Preprocessor took 325.16 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 785.9 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -898.7 MB). Peak memory consumption was 37.7 MB. Max. memory is 7.1 GB. [2018-07-24 14:30:48,804 INFO L168 Benchmark]: RCFGBuilder took 3802.27 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: 154.3 MB). Peak memory consumption was 154.3 MB. Max. memory is 7.1 GB. [2018-07-24 14:30:48,805 INFO L168 Benchmark]: TraceAbstraction took 227009.71 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 1.8 GB in the end (delta: 267.7 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2018-07-24 14:30:48,809 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 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 806.51 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: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 119.03 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 325.16 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 785.9 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -898.7 MB). Peak memory consumption was 37.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3802.27 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: 154.3 MB). Peak memory consumption was 154.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 227009.71 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 1.8 GB in the end (delta: 267.7 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 172]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 172). Cancelled while BasicCegarLoop was analyzing trace of length 1847 with TraceHistMax 15, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 3 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 226.9s OverallTime, 19 OverallIterations, 15 TraceHistogramMax, 112.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1761 SDtfs, 41441 SDslu, 4379 SDs, 0 SdLazy, 58639 SolverSat, 7870 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 73.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45979 GetRequests, 45258 SyntacticMatches, 82 SemanticMatches, 639 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10618 ImplicationChecksByTransitivity, 43.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21072occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 4.2s AutomataMinimizationTime, 18 MinimizatonAttempts, 5476 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 11.0s SatisfiabilityAnalysisTime, 76.7s InterpolantComputationTime, 34985 NumberOfCodeBlocks, 34985 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 57531 ConstructedInterpolants, 12 QuantifiedInterpolants, 256588193 SizeOfPredicates, 107 NumberOfNonLiveVariables, 31783 ConjunctsInSsa, 566 ConjunctsInUnsatCore, 70 InterpolantComputations, 6 PerfectInterpolantSequences, 148969/173875 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label17_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_14-30-48-829.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label17_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_14-30-48-829.csv Completed graceful shutdown