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_label23_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 14:27:26,014 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 14:27:26,019 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 14:27:26,033 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 14:27:26,033 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 14:27:26,034 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 14:27:26,036 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 14:27:26,039 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 14:27:26,042 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 14:27:26,043 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 14:27:26,044 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 14:27:26,044 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 14:27:26,045 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 14:27:26,046 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 14:27:26,047 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 14:27:26,048 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 14:27:26,048 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 14:27:26,050 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 14:27:26,052 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 14:27:26,054 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 14:27:26,055 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 14:27:26,056 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 14:27:26,059 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 14:27:26,059 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 14:27:26,059 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 14:27:26,062 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 14:27:26,063 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 14:27:26,064 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 14:27:26,067 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 14:27:26,072 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 14:27:26,073 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 14:27:26,074 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 14:27:26,074 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 14:27:26,074 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 14:27:26,075 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 14:27:26,076 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 14:27:26,076 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 14:27:26,093 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 14:27:26,093 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 14:27:26,094 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 14:27:26,094 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 14:27:26,094 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 14:27:26,094 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 14:27:26,095 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 14:27:26,095 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 14:27:26,095 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 14:27:26,095 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 14:27:26,095 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 14:27:26,096 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 14:27:26,096 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 14:27:26,097 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 14:27:26,097 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 14:27:26,097 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 14:27:26,097 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 14:27:26,097 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 14:27:26,098 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 14:27:26,098 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 14:27:26,098 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 14:27:26,098 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 14:27:26,098 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 14:27:26,098 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:27:26,099 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 14:27:26,099 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 14:27:26,099 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 14:27:26,101 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 14:27:26,101 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 14:27:26,101 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 14:27:26,101 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 14:27:26,101 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 14:27:26,102 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 14:27:26,146 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 14:27:26,159 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 14:27:26,163 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 14:27:26,165 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 14:27:26,165 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 14:27:26,166 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label23_true-unreach-call_false-termination.c [2018-07-24 14:27:26,511 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c01c34722/03657e4971b84bb3935eb740935fbd35/FLAG171666407 [2018-07-24 14:27:26,828 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 14:27:26,829 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label23_true-unreach-call_false-termination.c [2018-07-24 14:27:26,851 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c01c34722/03657e4971b84bb3935eb740935fbd35/FLAG171666407 [2018-07-24 14:27:26,874 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c01c34722/03657e4971b84bb3935eb740935fbd35 [2018-07-24 14:27:26,885 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 14:27:26,887 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 14:27:26,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 14:27:26,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 14:27:26,896 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 14:27:26,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:27:26" (1/1) ... [2018-07-24 14:27:26,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3472eeeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:26, skipping insertion in model container [2018-07-24 14:27:26,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:27:26" (1/1) ... [2018-07-24 14:27:27,109 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 14:27:27,391 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:27:27,406 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 14:27:27,662 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:27:27,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:27 WrapperNode [2018-07-24 14:27:27,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 14:27:27,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 14:27:27,720 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 14:27:27,720 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 14:27:27,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:27" (1/1) ... [2018-07-24 14:27:27,768 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:27" (1/1) ... [2018-07-24 14:27:27,854 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 14:27:27,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 14:27:27,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 14:27:27,855 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 14:27:27,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:27" (1/1) ... [2018-07-24 14:27:27,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:27" (1/1) ... [2018-07-24 14:27:27,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:27" (1/1) ... [2018-07-24 14:27:27,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:27" (1/1) ... [2018-07-24 14:27:28,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:27" (1/1) ... [2018-07-24 14:27:28,106 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:27" (1/1) ... [2018-07-24 14:27:28,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:27" (1/1) ... [2018-07-24 14:27:28,132 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 14:27:28,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 14:27:28,133 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 14:27:28,133 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 14:27:28,134 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:27" (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 14:27:28,195 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 14:27:28,195 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 14:27:28,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 14:27:28,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 14:27:28,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 14:27:28,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 14:27:28,196 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 14:27:28,196 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 14:27:31,905 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 14:27:31,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:27:31 BoogieIcfgContainer [2018-07-24 14:27:31,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 14:27:31,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 14:27:31,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 14:27:31,918 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 14:27:31,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 02:27:26" (1/3) ... [2018-07-24 14:27:31,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff32921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:27:31, skipping insertion in model container [2018-07-24 14:27:31,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:27" (2/3) ... [2018-07-24 14:27:31,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff32921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:27:31, skipping insertion in model container [2018-07-24 14:27:31,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:27:31" (3/3) ... [2018-07-24 14:27:31,924 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label23_true-unreach-call_false-termination.c [2018-07-24 14:27:31,932 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 14:27:31,941 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 14:27:31,994 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 14:27:31,995 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 14:27:31,995 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 14:27:31,995 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 14:27:31,995 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 14:27:31,996 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 14:27:31,996 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 14:27:31,996 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 14:27:31,996 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 14:27:32,023 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-07-24 14:27:32,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-07-24 14:27:32,032 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:27:32,033 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] [2018-07-24 14:27:32,033 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 14:27:32,038 INFO L82 PathProgramCache]: Analyzing trace with hash -845601649, now seen corresponding path program 1 times [2018-07-24 14:27:32,040 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:27:32,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:32,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:32,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:32,094 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:27:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:32,486 WARN L169 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 14:27:32,510 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 14:27:32,512 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:27:32,512 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 14:27:32,513 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:27:32,518 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:27:32,534 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:27:32,535 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 14:27:32,537 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-07-24 14:27:34,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:27:34,317 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-07-24 14:27:34,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:27:34,320 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2018-07-24 14:27:34,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:27:34,341 INFO L225 Difference]: With dead ends: 691 [2018-07-24 14:27:34,342 INFO L226 Difference]: Without dead ends: 434 [2018-07-24 14:27:34,349 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 14:27:34,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-07-24 14:27:34,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-07-24 14:27:34,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-07-24 14:27:34,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 773 transitions. [2018-07-24 14:27:34,434 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 773 transitions. Word has length 39 [2018-07-24 14:27:34,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:27:34,435 INFO L471 AbstractCegarLoop]: Abstraction has 434 states and 773 transitions. [2018-07-24 14:27:34,435 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:27:34,435 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 773 transitions. [2018-07-24 14:27:34,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-07-24 14:27:34,443 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:27:34,443 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:34,443 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 14:27:34,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1315087714, now seen corresponding path program 1 times [2018-07-24 14:27:34,446 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:27:34,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:34,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:34,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:34,447 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:27:34,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:27:34,800 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:27:34,800 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 14:27:34,801 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:27:34,803 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:27:34,803 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:27:34,803 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:27:34,804 INFO L87 Difference]: Start difference. First operand 434 states and 773 transitions. Second operand 6 states. [2018-07-24 14:27:39,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:27:39,624 INFO L93 Difference]: Finished difference Result 1611 states and 2994 transitions. [2018-07-24 14:27:39,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:27:39,628 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 121 [2018-07-24 14:27:39,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:27:39,642 INFO L225 Difference]: With dead ends: 1611 [2018-07-24 14:27:39,642 INFO L226 Difference]: Without dead ends: 1183 [2018-07-24 14:27:39,648 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-07-24 14:27:39,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2018-07-24 14:27:39,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1141. [2018-07-24 14:27:39,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1141 states. [2018-07-24 14:27:39,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1837 transitions. [2018-07-24 14:27:39,737 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1837 transitions. Word has length 121 [2018-07-24 14:27:39,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:27:39,738 INFO L471 AbstractCegarLoop]: Abstraction has 1141 states and 1837 transitions. [2018-07-24 14:27:39,738 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:27:39,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1837 transitions. [2018-07-24 14:27:39,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-07-24 14:27:39,742 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:27:39,742 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:39,743 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 14:27:39,743 INFO L82 PathProgramCache]: Analyzing trace with hash -964601082, now seen corresponding path program 1 times [2018-07-24 14:27:39,743 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:27:39,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:39,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:39,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:39,745 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:27:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:40,082 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:27:40,082 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:27:40,082 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 14:27:40,083 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:27:40,083 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:27:40,084 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:27:40,084 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:27:40,084 INFO L87 Difference]: Start difference. First operand 1141 states and 1837 transitions. Second operand 6 states. [2018-07-24 14:27:44,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:27:44,454 INFO L93 Difference]: Finished difference Result 2741 states and 4359 transitions. [2018-07-24 14:27:44,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-24 14:27:44,455 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2018-07-24 14:27:44,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:27:44,468 INFO L225 Difference]: With dead ends: 2741 [2018-07-24 14:27:44,469 INFO L226 Difference]: Without dead ends: 1606 [2018-07-24 14:27:44,474 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:27:44,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2018-07-24 14:27:44,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1532. [2018-07-24 14:27:44,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1532 states. [2018-07-24 14:27:44,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 2338 transitions. [2018-07-24 14:27:44,540 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 2338 transitions. Word has length 123 [2018-07-24 14:27:44,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:27:44,541 INFO L471 AbstractCegarLoop]: Abstraction has 1532 states and 2338 transitions. [2018-07-24 14:27:44,541 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:27:44,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 2338 transitions. [2018-07-24 14:27:44,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-07-24 14:27:44,544 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:27:44,544 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:44,544 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 14:27:44,545 INFO L82 PathProgramCache]: Analyzing trace with hash 906649879, now seen corresponding path program 1 times [2018-07-24 14:27:44,545 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:27:44,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:44,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:44,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:44,547 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:27:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:27:44,818 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:27:44,818 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:27:44,818 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:27:44,819 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:27:44,819 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:27:44,820 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:27:44,820 INFO L87 Difference]: Start difference. First operand 1532 states and 2338 transitions. Second operand 4 states. [2018-07-24 14:27:46,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:27:46,479 INFO L93 Difference]: Finished difference Result 3727 states and 6014 transitions. [2018-07-24 14:27:46,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:27:46,480 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2018-07-24 14:27:46,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:27:46,498 INFO L225 Difference]: With dead ends: 3727 [2018-07-24 14:27:46,498 INFO L226 Difference]: Without dead ends: 2201 [2018-07-24 14:27:46,509 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 14:27:46,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2018-07-24 14:27:46,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 2197. [2018-07-24 14:27:46,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2197 states. [2018-07-24 14:27:46,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2197 states to 2197 states and 3522 transitions. [2018-07-24 14:27:46,593 INFO L78 Accepts]: Start accepts. Automaton has 2197 states and 3522 transitions. Word has length 150 [2018-07-24 14:27:46,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:27:46,594 INFO L471 AbstractCegarLoop]: Abstraction has 2197 states and 3522 transitions. [2018-07-24 14:27:46,594 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:27:46,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2197 states and 3522 transitions. [2018-07-24 14:27:46,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-07-24 14:27:46,602 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:27:46,603 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:46,603 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 14:27:46,603 INFO L82 PathProgramCache]: Analyzing trace with hash -491137199, now seen corresponding path program 1 times [2018-07-24 14:27:46,603 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:27:46,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:46,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:46,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:46,605 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:27:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:47,493 WARN L169 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 13 [2018-07-24 14:27:47,702 WARN L169 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-07-24 14:27:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 113 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:27:48,025 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:27:48,025 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 14:27:48,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:48,036 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:27:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:48,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:27:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-07-24 14:27:48,614 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:27:48,992 WARN L169 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 14:27:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 64 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:27:49,260 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:27:49,260 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 13 [2018-07-24 14:27:49,260 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:27:49,261 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:27:49,261 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:27:49,261 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2018-07-24 14:27:49,262 INFO L87 Difference]: Start difference. First operand 2197 states and 3522 transitions. Second operand 5 states. [2018-07-24 14:27:53,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:27:53,349 INFO L93 Difference]: Finished difference Result 7641 states and 12352 transitions. [2018-07-24 14:27:53,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 14:27:53,352 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 233 [2018-07-24 14:27:53,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:27:53,382 INFO L225 Difference]: With dead ends: 7641 [2018-07-24 14:27:53,382 INFO L226 Difference]: Without dead ends: 5450 [2018-07-24 14:27:53,397 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 462 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-07-24 14:27:53,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5450 states. [2018-07-24 14:27:53,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5450 to 5407. [2018-07-24 14:27:53,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5407 states. [2018-07-24 14:27:53,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5407 states to 5407 states and 8218 transitions. [2018-07-24 14:27:53,537 INFO L78 Accepts]: Start accepts. Automaton has 5407 states and 8218 transitions. Word has length 233 [2018-07-24 14:27:53,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:27:53,538 INFO L471 AbstractCegarLoop]: Abstraction has 5407 states and 8218 transitions. [2018-07-24 14:27:53,538 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:27:53,538 INFO L276 IsEmpty]: Start isEmpty. Operand 5407 states and 8218 transitions. [2018-07-24 14:27:53,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-07-24 14:27:53,547 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:27:53,548 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:53,548 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 14:27:53,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1072673537, now seen corresponding path program 1 times [2018-07-24 14:27:53,549 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:27:53,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:53,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:53,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:53,550 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:27:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:54,053 WARN L169 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-07-24 14:27:54,519 WARN L169 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-07-24 14:27:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 64 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:27:55,088 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:27:55,088 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 14:27:55,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:55,101 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:27:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:55,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:27:55,885 WARN L169 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-07-24 14:27:56,164 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-07-24 14:27:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-07-24 14:27:56,308 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:27:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 64 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:27:56,968 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:27:56,969 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2018-07-24 14:27:56,969 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:27:56,969 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:27:56,970 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:27:56,970 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:27:56,970 INFO L87 Difference]: Start difference. First operand 5407 states and 8218 transitions. Second operand 6 states. [2018-07-24 14:27:59,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:27:59,940 INFO L93 Difference]: Finished difference Result 11662 states and 17584 transitions. [2018-07-24 14:27:59,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-24 14:27:59,944 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 257 [2018-07-24 14:27:59,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:27:59,975 INFO L225 Difference]: With dead ends: 11662 [2018-07-24 14:27:59,975 INFO L226 Difference]: Without dead ends: 6261 [2018-07-24 14:27:59,996 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 508 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2018-07-24 14:28:00,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6261 states. [2018-07-24 14:28:00,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6261 to 6209. [2018-07-24 14:28:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6209 states. [2018-07-24 14:28:00,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6209 states to 6209 states and 9259 transitions. [2018-07-24 14:28:00,145 INFO L78 Accepts]: Start accepts. Automaton has 6209 states and 9259 transitions. Word has length 257 [2018-07-24 14:28:00,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:28:00,145 INFO L471 AbstractCegarLoop]: Abstraction has 6209 states and 9259 transitions. [2018-07-24 14:28:00,145 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:28:00,146 INFO L276 IsEmpty]: Start isEmpty. Operand 6209 states and 9259 transitions. [2018-07-24 14:28:00,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-07-24 14:28:00,158 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:28:00,159 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:28:00,159 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 14:28:00,159 INFO L82 PathProgramCache]: Analyzing trace with hash -93101835, now seen corresponding path program 1 times [2018-07-24 14:28:00,160 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:28:00,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:00,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:00,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:00,161 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:28:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:00,644 WARN L169 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 14:28:00,898 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2018-07-24 14:28:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 184 proven. 160 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:28:01,325 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:01,325 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 14:28:01,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:01,334 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:28:01,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:01,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 263 proven. 53 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-07-24 14:28:01,854 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 106 proven. 238 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:28:02,425 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:02,425 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 14:28:02,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:02,484 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:28:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:02,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 263 proven. 53 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-07-24 14:28:03,352 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 106 proven. 238 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:28:04,313 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:28:04,314 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9, 8, 8] total 34 [2018-07-24 14:28:04,314 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:28:04,315 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-24 14:28:04,315 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-24 14:28:04,316 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2018-07-24 14:28:04,316 INFO L87 Difference]: Start difference. First operand 6209 states and 9259 transitions. Second operand 19 states. [2018-07-24 14:28:09,232 WARN L169 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2018-07-24 14:28:13,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:28:13,661 INFO L93 Difference]: Finished difference Result 12255 states and 18864 transitions. [2018-07-24 14:28:13,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-24 14:28:13,661 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 342 [2018-07-24 14:28:13,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:28:13,687 INFO L225 Difference]: With dead ends: 12255 [2018-07-24 14:28:13,688 INFO L226 Difference]: Without dead ends: 5839 [2018-07-24 14:28:13,718 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1430 GetRequests, 1368 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=789, Invalid=2871, Unknown=0, NotChecked=0, Total=3660 [2018-07-24 14:28:13,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5839 states. [2018-07-24 14:28:13,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5839 to 5434. [2018-07-24 14:28:13,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5434 states. [2018-07-24 14:28:13,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5434 states to 5434 states and 7328 transitions. [2018-07-24 14:28:13,853 INFO L78 Accepts]: Start accepts. Automaton has 5434 states and 7328 transitions. Word has length 342 [2018-07-24 14:28:13,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:28:13,854 INFO L471 AbstractCegarLoop]: Abstraction has 5434 states and 7328 transitions. [2018-07-24 14:28:13,854 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-24 14:28:13,854 INFO L276 IsEmpty]: Start isEmpty. Operand 5434 states and 7328 transitions. [2018-07-24 14:28:13,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-07-24 14:28:13,868 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:28:13,868 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 14:28:13,869 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 14:28:13,869 INFO L82 PathProgramCache]: Analyzing trace with hash -964341287, now seen corresponding path program 1 times [2018-07-24 14:28:13,869 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:28:13,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:13,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:13,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:13,871 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:28:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:14,704 WARN L169 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 14:28:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 265 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-07-24 14:28:15,024 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:15,024 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:28:15,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:15,041 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:28:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:15,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 265 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-07-24 14:28:15,541 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:15,655 WARN L169 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-07-24 14:28:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 265 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-07-24 14:28:16,067 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:16,068 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 14:28:16,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:16,083 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:28:16,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:16,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 259 proven. 8 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-07-24 14:28:16,559 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 265 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-07-24 14:28:17,328 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:28:17,328 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 8, 5] total 16 [2018-07-24 14:28:17,328 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:28:17,329 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 14:28:17,329 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 14:28:17,330 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-07-24 14:28:17,330 INFO L87 Difference]: Start difference. First operand 5434 states and 7328 transitions. Second operand 7 states. [2018-07-24 14:28:20,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:28:20,051 INFO L93 Difference]: Finished difference Result 12405 states and 16836 transitions. [2018-07-24 14:28:20,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 14:28:20,051 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 344 [2018-07-24 14:28:20,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:28:20,095 INFO L225 Difference]: With dead ends: 12405 [2018-07-24 14:28:20,100 INFO L226 Difference]: Without dead ends: 7160 [2018-07-24 14:28:20,122 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1396 GetRequests, 1366 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2018-07-24 14:28:20,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7160 states. [2018-07-24 14:28:20,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7160 to 6997. [2018-07-24 14:28:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6997 states. [2018-07-24 14:28:20,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6997 states to 6997 states and 8704 transitions. [2018-07-24 14:28:20,256 INFO L78 Accepts]: Start accepts. Automaton has 6997 states and 8704 transitions. Word has length 344 [2018-07-24 14:28:20,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:28:20,256 INFO L471 AbstractCegarLoop]: Abstraction has 6997 states and 8704 transitions. [2018-07-24 14:28:20,257 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 14:28:20,257 INFO L276 IsEmpty]: Start isEmpty. Operand 6997 states and 8704 transitions. [2018-07-24 14:28:20,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-07-24 14:28:20,274 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:28:20,274 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:28:20,275 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 14:28:20,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1897272713, now seen corresponding path program 1 times [2018-07-24 14:28:20,275 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:28:20,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:20,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:20,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:20,276 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:28:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:20,788 WARN L169 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 14:28:20,988 WARN L169 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-07-24 14:28:21,217 WARN L169 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 14:28:21,573 WARN L169 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-07-24 14:28:22,021 WARN L169 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-07-24 14:28:22,219 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2018-07-24 14:28:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 210 proven. 160 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:28:22,768 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:22,769 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 14:28:22,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:22,776 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:28:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:22,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 340 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-07-24 14:28:23,120 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 102 proven. 268 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:28:23,816 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:23,816 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 14:28:23,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:23,831 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:28:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:24,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:24,845 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 317 proven. 25 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-07-24 14:28:24,845 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 104 proven. 266 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:28:26,341 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:28:26,341 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8, 10, 11] total 40 [2018-07-24 14:28:26,342 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:28:26,343 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-24 14:28:26,344 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-24 14:28:26,345 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2018-07-24 14:28:26,346 INFO L87 Difference]: Start difference. First operand 6997 states and 8704 transitions. Second operand 19 states. [2018-07-24 14:28:30,342 WARN L169 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-07-24 14:28:31,215 WARN L169 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-07-24 14:28:31,933 WARN L169 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2018-07-24 14:28:33,890 WARN L169 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2018-07-24 14:28:34,299 WARN L169 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 36 [2018-07-24 14:28:36,304 WARN L169 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2018-07-24 14:28:36,737 WARN L169 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2018-07-24 14:28:42,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:28:42,034 INFO L93 Difference]: Finished difference Result 15933 states and 20572 transitions. [2018-07-24 14:28:42,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-24 14:28:42,041 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 368 [2018-07-24 14:28:42,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:28:42,073 INFO L225 Difference]: With dead ends: 15933 [2018-07-24 14:28:42,074 INFO L226 Difference]: Without dead ends: 9125 [2018-07-24 14:28:42,097 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1560 GetRequests, 1481 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1864 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1074, Invalid=5088, Unknown=0, NotChecked=0, Total=6162 [2018-07-24 14:28:42,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9125 states. [2018-07-24 14:28:42,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9125 to 8741. [2018-07-24 14:28:42,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8741 states. [2018-07-24 14:28:42,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8741 states to 8741 states and 10557 transitions. [2018-07-24 14:28:42,269 INFO L78 Accepts]: Start accepts. Automaton has 8741 states and 10557 transitions. Word has length 368 [2018-07-24 14:28:42,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:28:42,270 INFO L471 AbstractCegarLoop]: Abstraction has 8741 states and 10557 transitions. [2018-07-24 14:28:42,270 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-24 14:28:42,270 INFO L276 IsEmpty]: Start isEmpty. Operand 8741 states and 10557 transitions. [2018-07-24 14:28:42,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2018-07-24 14:28:42,289 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:28:42,290 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:28:42,290 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 14:28:42,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1119977589, now seen corresponding path program 1 times [2018-07-24 14:28:42,290 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:28:42,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:42,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:42,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:42,292 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:28:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:42,661 WARN L169 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-07-24 14:28:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 276 proven. 205 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-07-24 14:28:42,858 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:42,858 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 14:28:42,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:42,866 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:28:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:43,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 477 proven. 2 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2018-07-24 14:28:43,377 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 281 proven. 70 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2018-07-24 14:28:43,566 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:43,566 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 14:28:43,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:43,583 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:28:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:43,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 336 proven. 4 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-07-24 14:28:44,007 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:44,412 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 144 proven. 224 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2018-07-24 14:28:44,415 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:28:44,415 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-07-24 14:28:44,415 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:28:44,417 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:28:44,417 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:28:44,417 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:28:44,417 INFO L87 Difference]: Start difference. First operand 8741 states and 10557 transitions. Second operand 9 states. [2018-07-24 14:28:46,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:28:46,226 INFO L93 Difference]: Finished difference Result 17507 states and 22129 transitions. [2018-07-24 14:28:46,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-24 14:28:46,228 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 415 [2018-07-24 14:28:46,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:28:46,259 INFO L225 Difference]: With dead ends: 17507 [2018-07-24 14:28:46,260 INFO L226 Difference]: Without dead ends: 8955 [2018-07-24 14:28:46,277 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1676 GetRequests, 1648 SyntacticMatches, 13 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2018-07-24 14:28:46,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8955 states. [2018-07-24 14:28:46,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8955 to 8660. [2018-07-24 14:28:46,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8660 states. [2018-07-24 14:28:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8660 states to 8660 states and 10120 transitions. [2018-07-24 14:28:46,441 INFO L78 Accepts]: Start accepts. Automaton has 8660 states and 10120 transitions. Word has length 415 [2018-07-24 14:28:46,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:28:46,442 INFO L471 AbstractCegarLoop]: Abstraction has 8660 states and 10120 transitions. [2018-07-24 14:28:46,442 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:28:46,442 INFO L276 IsEmpty]: Start isEmpty. Operand 8660 states and 10120 transitions. [2018-07-24 14:28:46,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2018-07-24 14:28:46,456 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:28:46,456 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:28:46,456 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 14:28:46,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1008370439, now seen corresponding path program 1 times [2018-07-24 14:28:46,457 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:28:46,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:46,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:46,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:46,458 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:28:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 417 proven. 160 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-07-24 14:28:47,424 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:47,424 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 14:28:47,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:47,432 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:28:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:47,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:48,009 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 14:28:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 384 proven. 2 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-07-24 14:28:48,443 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 384 proven. 2 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-07-24 14:28:48,850 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:48,850 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 14:28:48,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:48,866 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:28:49,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:49,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 230 proven. 156 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-07-24 14:28:49,481 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 149 proven. 237 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-07-24 14:28:50,328 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:28:50,328 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 8, 8] total 16 [2018-07-24 14:28:50,329 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:28:50,330 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 14:28:50,330 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 14:28:50,330 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2018-07-24 14:28:50,331 INFO L87 Difference]: Start difference. First operand 8660 states and 10120 transitions. Second operand 13 states. [2018-07-24 14:28:51,080 WARN L169 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2018-07-24 14:28:54,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:28:54,343 INFO L93 Difference]: Finished difference Result 16694 states and 20151 transitions. [2018-07-24 14:28:54,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-24 14:28:54,343 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 429 [2018-07-24 14:28:54,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:28:54,375 INFO L225 Difference]: With dead ends: 16694 [2018-07-24 14:28:54,376 INFO L226 Difference]: Without dead ends: 7833 [2018-07-24 14:28:54,400 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1746 GetRequests, 1705 SyntacticMatches, 17 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2018-07-24 14:28:54,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7833 states. [2018-07-24 14:28:54,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7833 to 7410. [2018-07-24 14:28:54,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7410 states. [2018-07-24 14:28:54,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 8553 transitions. [2018-07-24 14:28:54,565 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 8553 transitions. Word has length 429 [2018-07-24 14:28:54,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:28:54,566 INFO L471 AbstractCegarLoop]: Abstraction has 7410 states and 8553 transitions. [2018-07-24 14:28:54,566 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 14:28:54,566 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 8553 transitions. [2018-07-24 14:28:54,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2018-07-24 14:28:54,580 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:28:54,581 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:28:54,581 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 14:28:54,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1704366171, now seen corresponding path program 2 times [2018-07-24 14:28:54,581 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:28:54,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:54,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:54,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:54,583 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:28:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:54,965 WARN L169 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-07-24 14:28:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 404 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:28:55,874 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:55,874 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 14:28:55,887 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 14:28:55,888 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 14:28:56,043 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 14:28:56,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 14:28:56,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:56,282 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 384 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-07-24 14:28:56,283 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 384 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-07-24 14:28:57,018 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:57,019 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 14:28:57,035 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 14:28:57,036 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 14:28:57,361 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 14:28:57,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 14:28:57,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 131 proven. 6 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-07-24 14:28:57,780 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:59,531 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-07-24 14:28:59,533 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-07-24 14:28:59,533 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [18, 5, 5, 5] total 28 [2018-07-24 14:28:59,533 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:28:59,534 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:28:59,535 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:28:59,535 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2018-07-24 14:28:59,536 INFO L87 Difference]: Start difference. First operand 7410 states and 8553 transitions. Second operand 5 states. [2018-07-24 14:29:00,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:29:00,982 INFO L93 Difference]: Finished difference Result 14617 states and 16925 transitions. [2018-07-24 14:29:00,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 14:29:00,983 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 455 [2018-07-24 14:29:00,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:29:01,009 INFO L225 Difference]: With dead ends: 14617 [2018-07-24 14:29:01,009 INFO L226 Difference]: Without dead ends: 7396 [2018-07-24 14:29:01,031 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1837 GetRequests, 1809 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2018-07-24 14:29:01,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7396 states. [2018-07-24 14:29:01,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7396 to 7394. [2018-07-24 14:29:01,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7394 states. [2018-07-24 14:29:01,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7394 states to 7394 states and 8431 transitions. [2018-07-24 14:29:01,199 INFO L78 Accepts]: Start accepts. Automaton has 7394 states and 8431 transitions. Word has length 455 [2018-07-24 14:29:01,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:29:01,200 INFO L471 AbstractCegarLoop]: Abstraction has 7394 states and 8431 transitions. [2018-07-24 14:29:01,200 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:29:01,201 INFO L276 IsEmpty]: Start isEmpty. Operand 7394 states and 8431 transitions. [2018-07-24 14:29:01,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 755 [2018-07-24 14:29:01,241 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:29:01,242 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, 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, 4, 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] [2018-07-24 14:29:01,242 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 14:29:01,243 INFO L82 PathProgramCache]: Analyzing trace with hash 953936146, now seen corresponding path program 1 times [2018-07-24 14:29:01,243 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:29:01,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:29:01,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 14:29:01,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:29:01,244 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:29:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1726 backedges. 558 proven. 199 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2018-07-24 14:29:02,291 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:29:02,291 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 14:29:02,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:02,299 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:29:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:02,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:29:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1726 backedges. 1249 proven. 2 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2018-07-24 14:29:02,980 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:29:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1726 backedges. 558 proven. 199 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2018-07-24 14:29:03,603 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:29:03,604 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 14:29:03,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:03,622 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:29:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:04,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:29:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1726 backedges. 1249 proven. 2 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2018-07-24 14:29:04,388 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:29:04,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1726 backedges. 558 proven. 199 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2018-07-24 14:29:04,768 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:29:04,768 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-07-24 14:29:04,768 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:29:04,770 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 14:29:04,770 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 14:29:04,773 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:29:04,774 INFO L87 Difference]: Start difference. First operand 7394 states and 8431 transitions. Second operand 7 states. [2018-07-24 14:29:07,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:29:07,736 INFO L93 Difference]: Finished difference Result 19133 states and 24877 transitions. [2018-07-24 14:29:07,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-24 14:29:07,737 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 754 [2018-07-24 14:29:07,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:29:07,814 INFO L225 Difference]: With dead ends: 19133 [2018-07-24 14:29:07,815 INFO L226 Difference]: Without dead ends: 11928 [2018-07-24 14:29:07,894 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3032 GetRequests, 3017 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-07-24 14:29:07,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11928 states. [2018-07-24 14:29:08,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11928 to 11682. [2018-07-24 14:29:08,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11682 states. [2018-07-24 14:29:08,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11682 states to 11682 states and 13593 transitions. [2018-07-24 14:29:08,185 INFO L78 Accepts]: Start accepts. Automaton has 11682 states and 13593 transitions. Word has length 754 [2018-07-24 14:29:08,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:29:08,186 INFO L471 AbstractCegarLoop]: Abstraction has 11682 states and 13593 transitions. [2018-07-24 14:29:08,187 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 14:29:08,187 INFO L276 IsEmpty]: Start isEmpty. Operand 11682 states and 13593 transitions. [2018-07-24 14:29:08,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2018-07-24 14:29:08,240 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:29:08,241 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, 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, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:29:08,241 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 14:29:08,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1451051865, now seen corresponding path program 1 times [2018-07-24 14:29:08,242 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:29:08,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:29:08,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:08,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:29:08,243 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:29:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:09,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 565 proven. 199 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2018-07-24 14:29:09,134 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:29:09,134 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 14:29:09,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:09,142 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:29:09,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:09,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:29:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 1263 proven. 2 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2018-07-24 14:29:09,827 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:29:10,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 565 proven. 199 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2018-07-24 14:29:10,270 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:29:10,271 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 14:29:10,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:10,286 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:29:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:10,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:29:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 1263 proven. 2 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2018-07-24 14:29:11,213 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:29:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 565 proven. 199 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2018-07-24 14:29:11,579 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:29:11,580 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-07-24 14:29:11,580 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:29:11,582 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 14:29:11,582 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 14:29:11,582 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:29:11,582 INFO L87 Difference]: Start difference. First operand 11682 states and 13593 transitions. Second operand 7 states. [2018-07-24 14:29:14,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:29:14,205 INFO L93 Difference]: Finished difference Result 28003 states and 37264 transitions. [2018-07-24 14:29:14,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-24 14:29:14,205 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 761 [2018-07-24 14:29:14,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:29:14,320 INFO L225 Difference]: With dead ends: 28003 [2018-07-24 14:29:14,321 INFO L226 Difference]: Without dead ends: 16510 [2018-07-24 14:29:14,414 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3060 GetRequests, 3045 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-07-24 14:29:14,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16510 states. [2018-07-24 14:29:14,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16510 to 16137. [2018-07-24 14:29:14,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16137 states. [2018-07-24 14:29:14,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16137 states to 16137 states and 18950 transitions. [2018-07-24 14:29:14,895 INFO L78 Accepts]: Start accepts. Automaton has 16137 states and 18950 transitions. Word has length 761 [2018-07-24 14:29:14,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:29:14,896 INFO L471 AbstractCegarLoop]: Abstraction has 16137 states and 18950 transitions. [2018-07-24 14:29:14,896 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 14:29:14,897 INFO L276 IsEmpty]: Start isEmpty. Operand 16137 states and 18950 transitions. [2018-07-24 14:29:14,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 889 [2018-07-24 14:29:14,994 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:29:14,995 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, 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, 5, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 14:29:14,995 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 14:29:14,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1924456969, now seen corresponding path program 1 times [2018-07-24 14:29:14,996 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:29:14,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:29:14,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:14,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:29:14,997 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:29:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2427 backedges. 611 proven. 1121 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2018-07-24 14:29:17,281 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:29:17,281 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 14:29:17,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:17,289 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:29:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:17,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:29:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2427 backedges. 1621 proven. 2 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2018-07-24 14:29:18,267 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:29:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2427 backedges. 737 proven. 199 refuted. 0 times theorem prover too weak. 1491 trivial. 0 not checked. [2018-07-24 14:29:18,913 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:29:18,913 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 14:29:18,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:18,929 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:29:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:19,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:29:20,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2427 backedges. 1642 proven. 74 refuted. 0 times theorem prover too weak. 711 trivial. 0 not checked. [2018-07-24 14:29:20,855 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:29:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2427 backedges. 284 proven. 1516 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2018-07-24 14:29:23,831 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:29:23,831 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6, 6, 10, 11] total 33 [2018-07-24 14:29:23,831 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:29:23,833 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-24 14:29:23,833 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-24 14:29:23,834 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2018-07-24 14:29:23,834 INFO L87 Difference]: Start difference. First operand 16137 states and 18950 transitions. Second operand 19 states. [2018-07-24 14:29:29,555 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2018-07-24 14:29:30,863 WARN L169 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2018-07-24 14:29:31,065 WARN L169 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2018-07-24 14:29:31,542 WARN L169 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2018-07-24 14:29:32,399 WARN L169 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2018-07-24 14:29:36,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:29:36,134 INFO L93 Difference]: Finished difference Result 34352 states and 41156 transitions. [2018-07-24 14:29:36,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-24 14:29:36,134 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 888 [2018-07-24 14:29:36,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:29:36,208 INFO L225 Difference]: With dead ends: 34352 [2018-07-24 14:29:36,208 INFO L226 Difference]: Without dead ends: 18404 [2018-07-24 14:29:36,317 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3645 GetRequests, 3555 SyntacticMatches, 12 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1730 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1088, Invalid=5232, Unknown=0, NotChecked=0, Total=6320 [2018-07-24 14:29:36,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18404 states. [2018-07-24 14:29:36,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18404 to 16171. [2018-07-24 14:29:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16171 states. [2018-07-24 14:29:36,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16171 states to 16171 states and 17925 transitions. [2018-07-24 14:29:36,684 INFO L78 Accepts]: Start accepts. Automaton has 16171 states and 17925 transitions. Word has length 888 [2018-07-24 14:29:36,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:29:36,685 INFO L471 AbstractCegarLoop]: Abstraction has 16171 states and 17925 transitions. [2018-07-24 14:29:36,685 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-24 14:29:36,685 INFO L276 IsEmpty]: Start isEmpty. Operand 16171 states and 17925 transitions. [2018-07-24 14:29:36,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 922 [2018-07-24 14:29:36,720 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:29:36,720 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, 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, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:29:36,721 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 14:29:36,721 INFO L82 PathProgramCache]: Analyzing trace with hash -2146735958, now seen corresponding path program 1 times [2018-07-24 14:29:36,721 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:29:36,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:29:36,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:36,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:29:36,722 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:29:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2474 backedges. 758 proven. 538 refuted. 0 times theorem prover too weak. 1178 trivial. 0 not checked. [2018-07-24 14:29:38,714 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:29:38,714 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 14:29:38,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:38,722 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:29:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:39,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:29:39,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2474 backedges. 1661 proven. 2 refuted. 0 times theorem prover too weak. 811 trivial. 0 not checked. [2018-07-24 14:29:39,526 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:29:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2474 backedges. 770 proven. 199 refuted. 0 times theorem prover too weak. 1505 trivial. 0 not checked. [2018-07-24 14:29:40,095 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:29:40,095 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 14:29:40,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:40,110 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:29:40,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:40,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:29:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2474 backedges. 1661 proven. 2 refuted. 0 times theorem prover too weak. 811 trivial. 0 not checked. [2018-07-24 14:29:41,119 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:29:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2474 backedges. 770 proven. 199 refuted. 0 times theorem prover too weak. 1505 trivial. 0 not checked. [2018-07-24 14:29:41,724 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:29:41,725 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 5, 5] total 19 [2018-07-24 14:29:41,725 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:29:41,727 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-24 14:29:41,727 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-24 14:29:41,727 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2018-07-24 14:29:41,727 INFO L87 Difference]: Start difference. First operand 16171 states and 17925 transitions. Second operand 17 states. [2018-07-24 14:29:47,610 WARN L169 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-07-24 14:29:51,938 WARN L169 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2018-07-24 14:29:53,454 WARN L169 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2018-07-24 14:29:57,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:29:57,396 INFO L93 Difference]: Finished difference Result 34691 states and 41333 transitions. [2018-07-24 14:29:57,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-07-24 14:29:57,397 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 921 [2018-07-24 14:29:57,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:29:57,514 INFO L225 Difference]: With dead ends: 34691 [2018-07-24 14:29:57,514 INFO L226 Difference]: Without dead ends: 18709 [2018-07-24 14:29:57,587 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3812 GetRequests, 3725 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2379 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1295, Invalid=6187, Unknown=0, NotChecked=0, Total=7482 [2018-07-24 14:29:57,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18709 states. [2018-07-24 14:29:58,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18709 to 17117. [2018-07-24 14:29:58,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17117 states. [2018-07-24 14:29:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17117 states to 17117 states and 18806 transitions. [2018-07-24 14:29:58,071 INFO L78 Accepts]: Start accepts. Automaton has 17117 states and 18806 transitions. Word has length 921 [2018-07-24 14:29:58,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:29:58,072 INFO L471 AbstractCegarLoop]: Abstraction has 17117 states and 18806 transitions. [2018-07-24 14:29:58,072 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-24 14:29:58,073 INFO L276 IsEmpty]: Start isEmpty. Operand 17117 states and 18806 transitions. [2018-07-24 14:29:58,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1008 [2018-07-24 14:29:58,110 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:29:58,111 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:29:58,112 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 14:29:58,112 INFO L82 PathProgramCache]: Analyzing trace with hash -444582381, now seen corresponding path program 1 times [2018-07-24 14:29:58,112 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:29:58,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:29:58,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:58,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:29:58,116 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:29:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3063 backedges. 631 proven. 224 refuted. 0 times theorem prover too weak. 2208 trivial. 0 not checked. [2018-07-24 14:29:59,387 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:29:59,387 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 14:29:59,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:59,395 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:29:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:59,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:30:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3063 backedges. 2005 proven. 2 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2018-07-24 14:30:00,182 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:30:00,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3063 backedges. 631 proven. 224 refuted. 0 times theorem prover too weak. 2208 trivial. 0 not checked. [2018-07-24 14:30:00,923 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:30:00,923 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 14:30:00,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:00,938 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:30:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:01,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:30:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3063 backedges. 2005 proven. 2 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2018-07-24 14:30:02,109 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:30:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3063 backedges. 631 proven. 224 refuted. 0 times theorem prover too weak. 2208 trivial. 0 not checked. [2018-07-24 14:30:02,614 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:30:02,615 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 11 [2018-07-24 14:30:02,615 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:30:02,616 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-24 14:30:02,617 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-24 14:30:02,617 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:30:02,617 INFO L87 Difference]: Start difference. First operand 17117 states and 18806 transitions. Second operand 10 states. [2018-07-24 14:30:06,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:30:06,372 INFO L93 Difference]: Finished difference Result 35949 states and 40025 transitions. [2018-07-24 14:30:06,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-24 14:30:06,373 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1007 [2018-07-24 14:30:06,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:30:06,416 INFO L225 Difference]: With dead ends: 35949 [2018-07-24 14:30:06,417 INFO L226 Difference]: Without dead ends: 19021 [2018-07-24 14:30:06,453 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4060 GetRequests, 4029 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2018-07-24 14:30:06,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19021 states. [2018-07-24 14:30:06,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19021 to 18868. [2018-07-24 14:30:06,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18868 states. [2018-07-24 14:30:06,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18868 states to 18868 states and 20505 transitions. [2018-07-24 14:30:06,752 INFO L78 Accepts]: Start accepts. Automaton has 18868 states and 20505 transitions. Word has length 1007 [2018-07-24 14:30:06,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:30:06,752 INFO L471 AbstractCegarLoop]: Abstraction has 18868 states and 20505 transitions. [2018-07-24 14:30:06,753 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-24 14:30:06,753 INFO L276 IsEmpty]: Start isEmpty. Operand 18868 states and 20505 transitions. [2018-07-24 14:30:06,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1108 [2018-07-24 14:30:06,785 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:30:06,785 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, 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, 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, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:30:06,786 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 14:30:06,786 INFO L82 PathProgramCache]: Analyzing trace with hash 619673756, now seen corresponding path program 1 times [2018-07-24 14:30:06,786 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:30:06,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:06,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:06,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:06,789 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:30:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:10,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3764 backedges. 1112 proven. 1692 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2018-07-24 14:30:10,249 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:30:10,250 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 14:30:10,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:10,257 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:30:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:10,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:30:11,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3764 backedges. 970 proven. 2 refuted. 0 times theorem prover too weak. 2792 trivial. 0 not checked. [2018-07-24 14:30:11,117 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:30:12,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3764 backedges. 970 proven. 2 refuted. 0 times theorem prover too weak. 2792 trivial. 0 not checked. [2018-07-24 14:30:12,507 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:30:12,507 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 14:30:12,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:12,523 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:30:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:13,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:30:14,673 WARN L169 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2018-07-24 14:30:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3764 backedges. 2236 proven. 6 refuted. 0 times theorem prover too weak. 1522 trivial. 0 not checked. [2018-07-24 14:30:15,608 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:30:17,732 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 14:30:19,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3764 backedges. 1641 proven. 287 refuted. 0 times theorem prover too weak. 1836 trivial. 0 not checked. [2018-07-24 14:30:19,127 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:30:19,128 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 5, 5, 7, 8] total 39 [2018-07-24 14:30:19,128 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:30:19,129 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-24 14:30:19,130 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-24 14:30:19,130 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1336, Unknown=0, NotChecked=0, Total=1482 [2018-07-24 14:30:19,131 INFO L87 Difference]: Start difference. First operand 18868 states and 20505 transitions. Second operand 27 states. [2018-07-24 14:30:19,282 WARN L169 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2018-07-24 14:30:40,300 WARN L169 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2018-07-24 14:30:42,390 WARN L169 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2018-07-24 14:30:46,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:30:46,923 INFO L93 Difference]: Finished difference Result 44464 states and 50381 transitions. [2018-07-24 14:30:46,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-07-24 14:30:46,923 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 1107 [2018-07-24 14:30:46,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:30:47,027 INFO L225 Difference]: With dead ends: 44464 [2018-07-24 14:30:47,027 INFO L226 Difference]: Without dead ends: 25785 [2018-07-24 14:30:47,102 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4610 GetRequests, 4478 SyntacticMatches, 2 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5268 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=2370, Invalid=14922, Unknown=0, NotChecked=0, Total=17292 [2018-07-24 14:30:47,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25785 states. [2018-07-24 14:30:47,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25785 to 25163. [2018-07-24 14:30:47,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25163 states. [2018-07-24 14:30:47,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25163 states to 25163 states and 27821 transitions. [2018-07-24 14:30:47,693 INFO L78 Accepts]: Start accepts. Automaton has 25163 states and 27821 transitions. Word has length 1107 [2018-07-24 14:30:47,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:30:47,694 INFO L471 AbstractCegarLoop]: Abstraction has 25163 states and 27821 transitions. [2018-07-24 14:30:47,694 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-24 14:30:47,694 INFO L276 IsEmpty]: Start isEmpty. Operand 25163 states and 27821 transitions. [2018-07-24 14:30:47,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1161 [2018-07-24 14:30:47,732 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:30:47,733 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, 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, 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, 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, 3, 3, 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] [2018-07-24 14:30:47,733 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 14:30:47,733 INFO L82 PathProgramCache]: Analyzing trace with hash 605677715, now seen corresponding path program 1 times [2018-07-24 14:30:47,733 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:30:47,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:47,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:47,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:47,734 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:30:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3866 backedges. 1691 proven. 166 refuted. 0 times theorem prover too weak. 2009 trivial. 0 not checked. [2018-07-24 14:30:49,000 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:30:49,000 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 14:30:49,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:49,016 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:30:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:49,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:30:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3866 backedges. 2286 proven. 6 refuted. 0 times theorem prover too weak. 1574 trivial. 0 not checked. [2018-07-24 14:30:50,074 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:30:51,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3866 backedges. 1691 proven. 339 refuted. 0 times theorem prover too weak. 1836 trivial. 0 not checked. [2018-07-24 14:30:51,536 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:30:51,536 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 29 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:30:51,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:51,551 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:30:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:52,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:30:52,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3866 backedges. 2286 proven. 6 refuted. 0 times theorem prover too weak. 1574 trivial. 0 not checked. [2018-07-24 14:30:52,972 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:30:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3866 backedges. 1691 proven. 339 refuted. 0 times theorem prover too weak. 1836 trivial. 0 not checked. [2018-07-24 14:30:53,968 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:30:53,970 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 7, 8] total 15 [2018-07-24 14:30:53,970 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:30:53,971 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:30:53,972 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:30:53,972 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-07-24 14:30:53,972 INFO L87 Difference]: Start difference. First operand 25163 states and 27821 transitions. Second operand 9 states. [2018-07-24 14:30:58,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:30:58,777 INFO L93 Difference]: Finished difference Result 57116 states and 63449 transitions. [2018-07-24 14:30:58,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-24 14:30:58,778 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1160 [2018-07-24 14:30:58,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:30:58,904 INFO L225 Difference]: With dead ends: 57116 [2018-07-24 14:30:58,904 INFO L226 Difference]: Without dead ends: 32142 [2018-07-24 14:30:59,003 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4658 GetRequests, 4637 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2018-07-24 14:30:59,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32142 states. [2018-07-24 14:30:59,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32142 to 31585. [2018-07-24 14:30:59,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31585 states. [2018-07-24 14:30:59,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31585 states to 31585 states and 35059 transitions. [2018-07-24 14:30:59,800 INFO L78 Accepts]: Start accepts. Automaton has 31585 states and 35059 transitions. Word has length 1160 [2018-07-24 14:30:59,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:30:59,801 INFO L471 AbstractCegarLoop]: Abstraction has 31585 states and 35059 transitions. [2018-07-24 14:30:59,801 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:30:59,801 INFO L276 IsEmpty]: Start isEmpty. Operand 31585 states and 35059 transitions. [2018-07-24 14:30:59,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1423 [2018-07-24 14:30:59,831 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:30:59,831 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, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 5, 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, 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 14:30:59,832 INFO L414 AbstractCegarLoop]: === Iteration 20 === [__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 14:30:59,832 INFO L82 PathProgramCache]: Analyzing trace with hash 742505579, now seen corresponding path program 1 times [2018-07-24 14:30:59,832 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:30:59,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:59,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:59,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:59,833 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:30:59,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:01,133 WARN L169 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-07-24 14:31:01,473 WARN L169 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-07-24 14:31:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5993 backedges. 1225 proven. 925 refuted. 0 times theorem prover too weak. 3843 trivial. 0 not checked. [2018-07-24 14:31:03,649 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:03,650 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:31:03,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:03,660 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:31:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:04,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5993 backedges. 1208 proven. 2 refuted. 0 times theorem prover too weak. 4783 trivial. 0 not checked. [2018-07-24 14:31:05,113 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5993 backedges. 1208 proven. 2 refuted. 0 times theorem prover too weak. 4783 trivial. 0 not checked. [2018-07-24 14:31:07,387 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:07,387 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 31 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 31 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:31:07,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:07,402 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:31:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:08,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5993 backedges. 1190 proven. 20 refuted. 0 times theorem prover too weak. 4783 trivial. 0 not checked. [2018-07-24 14:31:09,823 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:14,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5993 backedges. 429 proven. 781 refuted. 0 times theorem prover too weak. 4783 trivial. 0 not checked. [2018-07-24 14:31:14,056 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:31:14,058 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 8, 8] total 30 [2018-07-24 14:31:14,058 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:31:14,059 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-24 14:31:14,059 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-24 14:31:14,059 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2018-07-24 14:31:14,059 INFO L87 Difference]: Start difference. First operand 31585 states and 35059 transitions. Second operand 17 states. Received shutdown request... [2018-07-24 14:31:15,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 14:31:15,707 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 14:31:15,712 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 14:31:15,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 02:31:15 BoogieIcfgContainer [2018-07-24 14:31:15,713 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 14:31:15,714 INFO L168 Benchmark]: Toolchain (without parser) took 228828.02 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-07-24 14:31:15,715 INFO L168 Benchmark]: CDTParser took 0.29 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 14:31:15,715 INFO L168 Benchmark]: CACSL2BoogieTranslator took 831.05 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-07-24 14:31:15,716 INFO L168 Benchmark]: Boogie Procedure Inliner took 134.74 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 14:31:15,717 INFO L168 Benchmark]: Boogie Preprocessor took 277.36 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 799.5 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -897.4 MB). Peak memory consumption was 34.3 MB. Max. memory is 7.1 GB. [2018-07-24 14:31:15,717 INFO L168 Benchmark]: RCFGBuilder took 3773.47 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: 134.9 MB). Peak memory consumption was 134.9 MB. Max. memory is 7.1 GB. [2018-07-24 14:31:15,718 INFO L168 Benchmark]: TraceAbstraction took 223806.11 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 2.1 GB in the beginning and 2.4 GB in the end (delta: -304.8 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-07-24 14:31:15,722 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 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 831.05 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 134.74 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 277.36 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 799.5 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -897.4 MB). Peak memory consumption was 34.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3773.47 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: 134.9 MB). Peak memory consumption was 134.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 223806.11 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 2.1 GB in the beginning and 2.4 GB in the end (delta: -304.8 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 100). Cancelled while BasicCegarLoop was constructing difference of abstraction (31585states) and interpolant automaton (currently 9 states, 17 states before enhancement), while ReachableStatesComputation was computing reachable states (450 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 223.7s OverallTime, 20 OverallIterations, 12 TraceHistogramMax, 128.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1865 SDtfs, 50281 SDslu, 4981 SDs, 0 SdLazy, 75074 SolverSat, 10198 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 83.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43268 GetRequests, 42516 SyntacticMatches, 91 SemanticMatches, 661 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13692 ImplicationChecksByTransitivity, 45.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31585occurred in iteration=19, 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: 4.8s AutomataMinimizationTime, 19 MinimizatonAttempts, 7663 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.2s SsaConstructionTime, 10.4s SatisfiabilityAnalysisTime, 66.5s InterpolantComputationTime, 32532 NumberOfCodeBlocks, 32532 NumberOfCodeBlocksAsserted, 52 NumberOfCheckSat, 53688 ConstructedInterpolants, 12 QuantifiedInterpolants, 181376838 SizeOfPredicates, 101 NumberOfNonLiveVariables, 30873 ConjunctsInSsa, 541 ConjunctsInUnsatCore, 80 InterpolantComputations, 7 PerfectInterpolantSequences, 128254/141689 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_label23_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_14-31-15-734.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label23_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_14-31-15-734.csv Completed graceful shutdown