java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label03_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 12:00:38,005 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 12:00:38,007 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 12:00:38,019 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 12:00:38,020 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 12:00:38,021 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 12:00:38,022 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 12:00:38,024 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 12:00:38,025 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 12:00:38,026 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 12:00:38,027 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 12:00:38,027 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 12:00:38,028 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 12:00:38,029 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 12:00:38,030 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 12:00:38,031 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 12:00:38,032 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 12:00:38,034 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 12:00:38,036 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 12:00:38,038 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 12:00:38,039 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 12:00:38,040 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 12:00:38,042 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 12:00:38,043 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 12:00:38,043 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 12:00:38,044 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 12:00:38,045 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 12:00:38,046 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 12:00:38,046 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 12:00:38,048 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 12:00:38,048 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 12:00:38,049 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-09-10 12:00:38,051 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-10 12:00:38,066 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 12:00:38,067 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 12:00:38,068 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 12:00:38,068 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 12:00:38,068 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 12:00:38,068 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 12:00:38,068 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 12:00:38,069 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 12:00:38,069 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 12:00:38,069 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 12:00:38,069 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 12:00:38,070 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 12:00:38,070 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 12:00:38,070 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 12:00:38,071 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 12:00:38,071 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 12:00:38,071 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 12:00:38,071 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 12:00:38,071 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 12:00:38,072 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 12:00:38,072 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 12:00:38,072 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 12:00:38,072 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 12:00:38,072 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 12:00:38,072 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 12:00:38,073 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 12:00:38,073 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 12:00:38,073 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 12:00:38,073 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 12:00:38,073 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 12:00:38,074 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 12:00:38,074 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 12:00:38,074 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 12:00:38,133 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 12:00:38,150 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 12:00:38,154 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 12:00:38,156 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 12:00:38,156 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 12:00:38,157 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label03_true-unreach-call_false-termination.c [2018-09-10 12:00:38,519 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e56b19651/81652293a1c34616850b291cd4b54800/FLAGbad33f1e1 [2018-09-10 12:00:38,833 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 12:00:38,834 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label03_true-unreach-call_false-termination.c [2018-09-10 12:00:38,865 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e56b19651/81652293a1c34616850b291cd4b54800/FLAGbad33f1e1 [2018-09-10 12:00:38,886 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e56b19651/81652293a1c34616850b291cd4b54800 [2018-09-10 12:00:38,900 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 12:00:38,904 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 12:00:38,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 12:00:38,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 12:00:38,913 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 12:00:38,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:00:38" (1/1) ... [2018-09-10 12:00:38,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5569bc79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:00:38, skipping insertion in model container [2018-09-10 12:00:38,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:00:38" (1/1) ... [2018-09-10 12:00:39,144 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 12:00:39,509 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:00:39,532 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 12:00:39,643 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:00:39,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:00:39 WrapperNode [2018-09-10 12:00:39,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 12:00:39,703 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 12:00:39,703 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 12:00:39,703 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 12:00:39,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:00:39" (1/1) ... [2018-09-10 12:00:39,754 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:00:39" (1/1) ... [2018-09-10 12:00:39,854 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 12:00:39,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 12:00:39,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 12:00:39,855 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 12:00:40,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:00:39" (1/1) ... [2018-09-10 12:00:40,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:00:39" (1/1) ... [2018-09-10 12:00:40,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:00:39" (1/1) ... [2018-09-10 12:00:40,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:00:39" (1/1) ... [2018-09-10 12:00:40,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:00:39" (1/1) ... [2018-09-10 12:00:40,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:00:39" (1/1) ... [2018-09-10 12:00:40,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:00:39" (1/1) ... [2018-09-10 12:00:40,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 12:00:40,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 12:00:40,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 12:00:40,092 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 12:00:40,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:00:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 12:00:40,164 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_output [2018-09-10 12:00:40,164 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_output [2018-09-10 12:00:40,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 12:00:40,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 12:00:40,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 12:00:40,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 12:00:40,165 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 12:00:40,166 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 12:00:43,904 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 12:00:43,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:00:43 BoogieIcfgContainer [2018-09-10 12:00:43,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 12:00:43,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 12:00:43,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 12:00:43,910 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 12:00:43,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 12:00:38" (1/3) ... [2018-09-10 12:00:43,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c7f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:00:43, skipping insertion in model container [2018-09-10 12:00:43,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:00:39" (2/3) ... [2018-09-10 12:00:43,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c7f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:00:43, skipping insertion in model container [2018-09-10 12:00:43,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:00:43" (3/3) ... [2018-09-10 12:00:43,914 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label03_true-unreach-call_false-termination.c [2018-09-10 12:00:43,924 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 12:00:43,933 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 12:00:43,989 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 12:00:43,990 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 12:00:43,990 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 12:00:43,991 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 12:00:43,991 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 12:00:43,991 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 12:00:43,991 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 12:00:43,991 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 12:00:43,992 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 12:00:44,029 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-09-10 12:00:44,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-10 12:00:44,040 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:00:44,041 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:00:44,042 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:00:44,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1455829652, now seen corresponding path program 1 times [2018-09-10 12:00:44,051 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:00:44,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:00:44,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:00:44,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:00:44,106 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:00:44,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:00:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:00:44,595 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:00:44,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 12:00:44,595 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:00:44,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:00:44,618 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:00:44,618 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:00:44,621 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-09-10 12:00:46,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:00:46,501 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-09-10 12:00:46,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:00:46,504 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2018-09-10 12:00:46,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:00:46,524 INFO L225 Difference]: With dead ends: 691 [2018-09-10 12:00:46,524 INFO L226 Difference]: Without dead ends: 434 [2018-09-10 12:00:46,533 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:00:46,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-09-10 12:00:46,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-09-10 12:00:46,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-09-10 12:00:46,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-09-10 12:00:46,615 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 58 [2018-09-10 12:00:46,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:00:46,616 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-09-10 12:00:46,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:00:46,616 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-09-10 12:00:46,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-10 12:00:46,623 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:00:46,624 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:00:46,624 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:00:46,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1825091112, now seen corresponding path program 1 times [2018-09-10 12:00:46,625 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:00:46,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:00:46,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:00:46,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:00:46,627 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:00:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:00:46,999 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:00:47,000 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:00:47,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 12:00:47,000 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:00:47,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:00:47,003 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:00:47,003 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:00:47,003 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-09-10 12:00:50,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:00:50,878 INFO L93 Difference]: Finished difference Result 1588 states and 2935 transitions. [2018-09-10 12:00:50,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:00:50,879 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2018-09-10 12:00:50,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:00:50,891 INFO L225 Difference]: With dead ends: 1588 [2018-09-10 12:00:50,892 INFO L226 Difference]: Without dead ends: 1160 [2018-09-10 12:00:50,899 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-10 12:00:50,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2018-09-10 12:00:50,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1153. [2018-09-10 12:00:50,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1153 states. [2018-09-10 12:00:50,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1887 transitions. [2018-09-10 12:00:50,975 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1887 transitions. Word has length 128 [2018-09-10 12:00:50,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:00:50,976 INFO L480 AbstractCegarLoop]: Abstraction has 1153 states and 1887 transitions. [2018-09-10 12:00:50,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:00:50,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1887 transitions. [2018-09-10 12:00:50,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-10 12:00:50,984 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:00:50,985 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:00:50,985 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:00:50,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1729363299, now seen corresponding path program 1 times [2018-09-10 12:00:50,986 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:00:50,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:00:50,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:00:50,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:00:50,988 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:00:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:00:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:00:51,242 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:00:51,242 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-10 12:00:51,242 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:00:51,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:00:51,243 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:00:51,243 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-10 12:00:51,244 INFO L87 Difference]: Start difference. First operand 1153 states and 1887 transitions. Second operand 5 states. [2018-09-10 12:00:54,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:00:54,283 INFO L93 Difference]: Finished difference Result 2716 states and 4601 transitions. [2018-09-10 12:00:54,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:00:54,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2018-09-10 12:00:54,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:00:54,310 INFO L225 Difference]: With dead ends: 2716 [2018-09-10 12:00:54,310 INFO L226 Difference]: Without dead ends: 1569 [2018-09-10 12:00:54,315 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-10 12:00:54,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2018-09-10 12:00:54,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1538. [2018-09-10 12:00:54,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1538 states. [2018-09-10 12:00:54,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 2356 transitions. [2018-09-10 12:00:54,381 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 2356 transitions. Word has length 129 [2018-09-10 12:00:54,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:00:54,381 INFO L480 AbstractCegarLoop]: Abstraction has 1538 states and 2356 transitions. [2018-09-10 12:00:54,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:00:54,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 2356 transitions. [2018-09-10 12:00:54,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-10 12:00:54,387 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:00:54,387 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:00:54,388 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:00:54,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1427880185, now seen corresponding path program 1 times [2018-09-10 12:00:54,388 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:00:54,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:00:54,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:00:54,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:00:54,391 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:00:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:00:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:00:54,680 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:00:54,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-10 12:00:54,680 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:00:54,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:00:54,681 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:00:54,681 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-10 12:00:54,681 INFO L87 Difference]: Start difference. First operand 1538 states and 2356 transitions. Second operand 5 states. [2018-09-10 12:00:57,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:00:57,261 INFO L93 Difference]: Finished difference Result 4907 states and 7504 transitions. [2018-09-10 12:00:57,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 12:00:57,264 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2018-09-10 12:00:57,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:00:57,285 INFO L225 Difference]: With dead ends: 4907 [2018-09-10 12:00:57,285 INFO L226 Difference]: Without dead ends: 3375 [2018-09-10 12:00:57,298 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-10 12:00:57,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2018-09-10 12:00:57,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 3262. [2018-09-10 12:00:57,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3262 states. [2018-09-10 12:00:57,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3262 states to 3262 states and 4436 transitions. [2018-09-10 12:00:57,404 INFO L78 Accepts]: Start accepts. Automaton has 3262 states and 4436 transitions. Word has length 131 [2018-09-10 12:00:57,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:00:57,405 INFO L480 AbstractCegarLoop]: Abstraction has 3262 states and 4436 transitions. [2018-09-10 12:00:57,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:00:57,405 INFO L276 IsEmpty]: Start isEmpty. Operand 3262 states and 4436 transitions. [2018-09-10 12:00:57,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-10 12:00:57,407 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:00:57,407 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:00:57,407 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:00:57,408 INFO L82 PathProgramCache]: Analyzing trace with hash 572547600, now seen corresponding path program 1 times [2018-09-10 12:00:57,408 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:00:57,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:00:57,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:00:57,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:00:57,409 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:00:57,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:00:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:00:57,525 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:00:57,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-10 12:00:57,525 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:00:57,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 12:00:57,526 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 12:00:57,526 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:00:57,526 INFO L87 Difference]: Start difference. First operand 3262 states and 4436 transitions. Second operand 4 states. [2018-09-10 12:00:59,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:00:59,955 INFO L93 Difference]: Finished difference Result 8795 states and 12468 transitions. [2018-09-10 12:00:59,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 12:00:59,956 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2018-09-10 12:00:59,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:00:59,984 INFO L225 Difference]: With dead ends: 8795 [2018-09-10 12:00:59,984 INFO L226 Difference]: Without dead ends: 5539 [2018-09-10 12:01:00,005 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:01:00,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5539 states. [2018-09-10 12:01:00,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5539 to 5539. [2018-09-10 12:01:00,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5539 states. [2018-09-10 12:01:00,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5539 states to 5539 states and 7494 transitions. [2018-09-10 12:01:00,148 INFO L78 Accepts]: Start accepts. Automaton has 5539 states and 7494 transitions. Word has length 132 [2018-09-10 12:01:00,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:01:00,148 INFO L480 AbstractCegarLoop]: Abstraction has 5539 states and 7494 transitions. [2018-09-10 12:01:00,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 12:01:00,149 INFO L276 IsEmpty]: Start isEmpty. Operand 5539 states and 7494 transitions. [2018-09-10 12:01:00,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-09-10 12:01:00,170 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:01:00,170 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:01:00,171 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:01:00,171 INFO L82 PathProgramCache]: Analyzing trace with hash -466363196, now seen corresponding path program 1 times [2018-09-10 12:01:00,171 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:01:00,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:00,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:00,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:00,173 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:01:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 205 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:01:01,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:01:01,426 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:01:01,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:01,438 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:01:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:01,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:01:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2018-09-10 12:01:01,869 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:01:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2018-09-10 12:01:02,183 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 12:01:02,183 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [10] total 12 [2018-09-10 12:01:02,184 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:01:02,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:01:02,184 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:01:02,185 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:01:02,185 INFO L87 Difference]: Start difference. First operand 5539 states and 7494 transitions. Second operand 3 states. [2018-09-10 12:01:05,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:01:05,109 INFO L93 Difference]: Finished difference Result 12598 states and 17780 transitions. [2018-09-10 12:01:05,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:01:05,110 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 276 [2018-09-10 12:01:05,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:01:05,152 INFO L225 Difference]: With dead ends: 12598 [2018-09-10 12:01:05,152 INFO L226 Difference]: Without dead ends: 7065 [2018-09-10 12:01:05,210 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 550 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:01:05,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7065 states. [2018-09-10 12:01:05,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7065 to 7060. [2018-09-10 12:01:05,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7060 states. [2018-09-10 12:01:05,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7060 states to 7060 states and 9592 transitions. [2018-09-10 12:01:05,504 INFO L78 Accepts]: Start accepts. Automaton has 7060 states and 9592 transitions. Word has length 276 [2018-09-10 12:01:05,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:01:05,505 INFO L480 AbstractCegarLoop]: Abstraction has 7060 states and 9592 transitions. [2018-09-10 12:01:05,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:01:05,507 INFO L276 IsEmpty]: Start isEmpty. Operand 7060 states and 9592 transitions. [2018-09-10 12:01:05,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2018-09-10 12:01:05,537 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:01:05,538 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:01:05,538 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:01:05,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1750776181, now seen corresponding path program 1 times [2018-09-10 12:01:05,539 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:01:05,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:05,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:05,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:05,540 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:01:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:05,941 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-10 12:01:06,193 WARN L175 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-09-10 12:01:06,857 WARN L175 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2018-09-10 12:01:07,420 WARN L175 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-09-10 12:01:08,108 WARN L175 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-09-10 12:01:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:01:08,302 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:01:08,302 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-10 12:01:08,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:08,310 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:01:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:08,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:01:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-09-10 12:01:08,877 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:01:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 102 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:01:10,140 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:01:10,141 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2018-09-10 12:01:10,141 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:01:10,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:01:10,142 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:01:10,142 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2018-09-10 12:01:10,142 INFO L87 Difference]: Start difference. First operand 7060 states and 9592 transitions. Second operand 5 states. [2018-09-10 12:01:15,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:01:15,384 INFO L93 Difference]: Finished difference Result 16084 states and 21759 transitions. [2018-09-10 12:01:15,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:01:15,386 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 301 [2018-09-10 12:01:15,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:01:15,442 INFO L225 Difference]: With dead ends: 16084 [2018-09-10 12:01:15,442 INFO L226 Difference]: Without dead ends: 9030 [2018-09-10 12:01:15,475 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 597 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2018-09-10 12:01:15,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9030 states. [2018-09-10 12:01:15,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9030 to 8088. [2018-09-10 12:01:15,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8088 states. [2018-09-10 12:01:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8088 states to 8088 states and 10793 transitions. [2018-09-10 12:01:15,717 INFO L78 Accepts]: Start accepts. Automaton has 8088 states and 10793 transitions. Word has length 301 [2018-09-10 12:01:15,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:01:15,718 INFO L480 AbstractCegarLoop]: Abstraction has 8088 states and 10793 transitions. [2018-09-10 12:01:15,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:01:15,718 INFO L276 IsEmpty]: Start isEmpty. Operand 8088 states and 10793 transitions. [2018-09-10 12:01:15,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2018-09-10 12:01:15,753 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:01:15,754 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 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] [2018-09-10 12:01:15,754 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:01:15,755 INFO L82 PathProgramCache]: Analyzing trace with hash 516035528, now seen corresponding path program 1 times [2018-09-10 12:01:15,755 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:01:15,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:15,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:15,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:15,756 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:01:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:16,282 WARN L175 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-10 12:01:16,489 WARN L175 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-10 12:01:16,696 WARN L175 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-10 12:01:17,155 WARN L175 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-09-10 12:01:17,669 WARN L175 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-09-10 12:01:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 241 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:01:18,222 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:01:18,222 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:01:18,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:18,230 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:01:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:18,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:01:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 331 proven. 53 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-09-10 12:01:18,779 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:01:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 163 proven. 268 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:01:19,377 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:01:19,377 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:01:19,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:19,395 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:01:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:19,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:01:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 331 proven. 53 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-09-10 12:01:20,118 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:01:20,781 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 163 proven. 268 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:01:20,783 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:01:20,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8, 8, 8] total 26 [2018-09-10 12:01:20,784 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:01:20,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-10 12:01:20,785 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-10 12:01:20,785 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2018-09-10 12:01:20,786 INFO L87 Difference]: Start difference. First operand 8088 states and 10793 transitions. Second operand 15 states. [2018-09-10 12:01:27,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:01:27,544 INFO L93 Difference]: Finished difference Result 16168 states and 21852 transitions. [2018-09-10 12:01:27,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-10 12:01:27,545 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 386 [2018-09-10 12:01:27,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:01:27,570 INFO L225 Difference]: With dead ends: 16168 [2018-09-10 12:01:27,570 INFO L226 Difference]: Without dead ends: 8253 [2018-09-10 12:01:27,592 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1588 GetRequests, 1541 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2018-09-10 12:01:27,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8253 states. [2018-09-10 12:01:27,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8253 to 7772. [2018-09-10 12:01:27,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7772 states. [2018-09-10 12:01:27,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7772 states to 7772 states and 9795 transitions. [2018-09-10 12:01:27,778 INFO L78 Accepts]: Start accepts. Automaton has 7772 states and 9795 transitions. Word has length 386 [2018-09-10 12:01:27,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:01:27,779 INFO L480 AbstractCegarLoop]: Abstraction has 7772 states and 9795 transitions. [2018-09-10 12:01:27,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-10 12:01:27,779 INFO L276 IsEmpty]: Start isEmpty. Operand 7772 states and 9795 transitions. [2018-09-10 12:01:27,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-09-10 12:01:27,811 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:01:27,812 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-10 12:01:27,812 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:01:27,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1658686337, now seen corresponding path program 1 times [2018-09-10 12:01:27,814 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:01:27,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:27,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:27,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:27,815 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:01:27,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:28,239 WARN L175 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:01:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 268 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:01:29,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:01:29,257 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:01:29,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:29,265 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:01:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:29,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:01:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 269 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2018-09-10 12:01:29,629 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:01:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 153 proven. 210 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-09-10 12:01:30,010 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:01:30,011 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [15, 5] total 19 [2018-09-10 12:01:30,011 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:01:30,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:01:30,013 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:01:30,013 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2018-09-10 12:01:30,013 INFO L87 Difference]: Start difference. First operand 7772 states and 9795 transitions. Second operand 5 states. [2018-09-10 12:01:32,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:01:32,277 INFO L93 Difference]: Finished difference Result 20571 states and 26469 transitions. [2018-09-10 12:01:32,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 12:01:32,282 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 411 [2018-09-10 12:01:32,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:01:32,319 INFO L225 Difference]: With dead ends: 20571 [2018-09-10 12:01:32,319 INFO L226 Difference]: Without dead ends: 12805 [2018-09-10 12:01:32,346 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 817 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2018-09-10 12:01:32,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12805 states. [2018-09-10 12:01:32,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12805 to 12679. [2018-09-10 12:01:32,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12679 states. [2018-09-10 12:01:32,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12679 states to 12679 states and 15899 transitions. [2018-09-10 12:01:32,614 INFO L78 Accepts]: Start accepts. Automaton has 12679 states and 15899 transitions. Word has length 411 [2018-09-10 12:01:32,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:01:32,614 INFO L480 AbstractCegarLoop]: Abstraction has 12679 states and 15899 transitions. [2018-09-10 12:01:32,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:01:32,615 INFO L276 IsEmpty]: Start isEmpty. Operand 12679 states and 15899 transitions. [2018-09-10 12:01:32,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2018-09-10 12:01:32,668 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:01:32,668 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:01:32,668 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:01:32,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1714561176, now seen corresponding path program 1 times [2018-09-10 12:01:32,669 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:01:32,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:32,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:32,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:32,670 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:01:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:33,825 WARN L175 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 13 [2018-09-10 12:01:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 542 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-10 12:01:34,063 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:01:34,063 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:01:34,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:34,071 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:01:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:34,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:01:34,777 WARN L175 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-09-10 12:01:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 542 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-10 12:01:34,948 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:01:35,466 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 542 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-10 12:01:35,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:01:35,488 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:01:35,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:35,504 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:01:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:35,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:01:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 542 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-10 12:01:36,200 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:01:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 542 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-10 12:01:36,670 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:01:36,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 12 [2018-09-10 12:01:36,671 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:01:36,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-10 12:01:36,673 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-10 12:01:36,673 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:01:36,673 INFO L87 Difference]: Start difference. First operand 12679 states and 15899 transitions. Second operand 10 states. [2018-09-10 12:01:40,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:01:40,872 INFO L93 Difference]: Finished difference Result 22280 states and 28600 transitions. [2018-09-10 12:01:40,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-10 12:01:40,872 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 522 [2018-09-10 12:01:40,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:01:40,899 INFO L225 Difference]: With dead ends: 22280 [2018-09-10 12:01:40,899 INFO L226 Difference]: Without dead ends: 9607 [2018-09-10 12:01:40,933 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2123 GetRequests, 2092 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2018-09-10 12:01:40,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9607 states. [2018-09-10 12:01:41,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9607 to 9228. [2018-09-10 12:01:41,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9228 states. [2018-09-10 12:01:41,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9228 states to 9228 states and 10992 transitions. [2018-09-10 12:01:41,082 INFO L78 Accepts]: Start accepts. Automaton has 9228 states and 10992 transitions. Word has length 522 [2018-09-10 12:01:41,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:01:41,083 INFO L480 AbstractCegarLoop]: Abstraction has 9228 states and 10992 transitions. [2018-09-10 12:01:41,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-10 12:01:41,083 INFO L276 IsEmpty]: Start isEmpty. Operand 9228 states and 10992 transitions. [2018-09-10 12:01:41,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2018-09-10 12:01:41,107 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:01:41,107 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2018-09-10 12:01:41,108 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:01:41,108 INFO L82 PathProgramCache]: Analyzing trace with hash -37262620, now seen corresponding path program 1 times [2018-09-10 12:01:41,108 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:01:41,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:41,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:41,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:41,109 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:01:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:41,482 WARN L175 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-09-10 12:01:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 331 proven. 501 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-09-10 12:01:42,305 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:01:42,305 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:01:42,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:42,313 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:01:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:42,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:01:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 725 proven. 2 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2018-09-10 12:01:42,781 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:01:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 436 proven. 129 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-09-10 12:01:43,292 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:01:43,292 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:01:43,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:43,309 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:01:43,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:43,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:01:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 719 proven. 8 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2018-09-10 12:01:44,376 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:01:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 436 proven. 129 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-09-10 12:01:45,254 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:01:45,255 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5, 8, 5] total 24 [2018-09-10 12:01:45,255 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:01:45,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-10 12:01:45,256 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-10 12:01:45,256 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2018-09-10 12:01:45,257 INFO L87 Difference]: Start difference. First operand 9228 states and 10992 transitions. Second operand 14 states. [2018-09-10 12:01:51,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:01:51,664 INFO L93 Difference]: Finished difference Result 18632 states and 22674 transitions. [2018-09-10 12:01:51,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-10 12:01:51,664 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 540 [2018-09-10 12:01:51,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:01:51,689 INFO L225 Difference]: With dead ends: 18632 [2018-09-10 12:01:51,689 INFO L226 Difference]: Without dead ends: 9782 [2018-09-10 12:01:51,704 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2229 GetRequests, 2173 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=498, Invalid=2258, Unknown=0, NotChecked=0, Total=2756 [2018-09-10 12:01:51,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9782 states. [2018-09-10 12:01:51,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9782 to 9533. [2018-09-10 12:01:51,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9533 states. [2018-09-10 12:01:51,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9533 states to 9533 states and 10939 transitions. [2018-09-10 12:01:51,862 INFO L78 Accepts]: Start accepts. Automaton has 9533 states and 10939 transitions. Word has length 540 [2018-09-10 12:01:51,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:01:51,863 INFO L480 AbstractCegarLoop]: Abstraction has 9533 states and 10939 transitions. [2018-09-10 12:01:51,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-10 12:01:51,863 INFO L276 IsEmpty]: Start isEmpty. Operand 9533 states and 10939 transitions. [2018-09-10 12:01:51,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 626 [2018-09-10 12:01:51,890 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:01:51,890 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:01:51,890 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:01:51,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1504166415, now seen corresponding path program 1 times [2018-09-10 12:01:51,891 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:01:51,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:51,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:51,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:51,892 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:01:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1277 backedges. 586 proven. 499 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2018-09-10 12:01:53,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:01:53,243 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:01:53,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:53,251 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:01:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:53,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:01:53,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1277 backedges. 949 proven. 2 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2018-09-10 12:01:53,942 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:01:54,114 WARN L175 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2018-09-10 12:01:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1277 backedges. 580 proven. 129 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2018-09-10 12:01:54,748 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:01:54,748 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:01:54,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:54,765 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:01:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:55,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:01:55,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1277 backedges. 741 proven. 210 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2018-09-10 12:01:55,816 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:01:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1277 backedges. 291 proven. 707 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-10 12:01:56,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:01:56,783 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 8, 8] total 16 [2018-09-10 12:01:56,783 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:01:56,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-10 12:01:56,784 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-10 12:01:56,784 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2018-09-10 12:01:56,785 INFO L87 Difference]: Start difference. First operand 9533 states and 10939 transitions. Second operand 13 states. [2018-09-10 12:02:01,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:02:01,328 INFO L93 Difference]: Finished difference Result 18957 states and 22470 transitions. [2018-09-10 12:02:01,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-10 12:02:01,329 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 625 [2018-09-10 12:02:01,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:02:01,355 INFO L225 Difference]: With dead ends: 18957 [2018-09-10 12:02:01,355 INFO L226 Difference]: Without dead ends: 9677 [2018-09-10 12:02:01,372 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2530 GetRequests, 2489 SyntacticMatches, 17 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2018-09-10 12:02:01,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9677 states. [2018-09-10 12:02:01,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9677 to 9503. [2018-09-10 12:02:01,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9503 states. [2018-09-10 12:02:01,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9503 states to 9503 states and 10696 transitions. [2018-09-10 12:02:01,550 INFO L78 Accepts]: Start accepts. Automaton has 9503 states and 10696 transitions. Word has length 625 [2018-09-10 12:02:01,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:02:01,551 INFO L480 AbstractCegarLoop]: Abstraction has 9503 states and 10696 transitions. [2018-09-10 12:02:01,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-10 12:02:01,551 INFO L276 IsEmpty]: Start isEmpty. Operand 9503 states and 10696 transitions. [2018-09-10 12:02:01,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2018-09-10 12:02:01,568 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:02:01,569 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2018-09-10 12:02:01,569 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:02:01,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1361665915, now seen corresponding path program 2 times [2018-09-10 12:02:01,570 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:02:01,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:01,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:01,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:01,571 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:02:01,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:02,382 WARN L175 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2018-09-10 12:02:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 612 proven. 551 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2018-09-10 12:02:03,466 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:02:03,466 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:02:03,474 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-10 12:02:03,474 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 12:02:03,701 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-10 12:02:03,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 12:02:03,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:02:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 1001 proven. 2 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2018-09-10 12:02:04,639 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:02:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 606 proven. 129 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2018-09-10 12:02:05,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:02:05,715 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:02:05,731 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-10 12:02:05,732 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 12:02:06,225 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-10 12:02:06,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 12:02:06,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:02:06,578 WARN L175 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2018-09-10 12:02:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 995 proven. 8 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2018-09-10 12:02:07,438 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:02:07,804 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-09-10 12:02:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 285 proven. 765 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-09-10 12:02:09,838 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:02:09,838 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5, 11, 11] total 32 [2018-09-10 12:02:09,838 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:02:09,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-10 12:02:09,840 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-10 12:02:09,840 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2018-09-10 12:02:09,840 INFO L87 Difference]: Start difference. First operand 9503 states and 10696 transitions. Second operand 18 states. [2018-09-10 12:02:12,039 WARN L175 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2018-09-10 12:02:14,065 WARN L175 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2018-09-10 12:02:14,754 WARN L175 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2018-09-10 12:02:14,914 WARN L175 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2018-09-10 12:02:15,263 WARN L175 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2018-09-10 12:02:15,604 WARN L175 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2018-09-10 12:02:18,229 WARN L175 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2018-09-10 12:02:18,460 WARN L175 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-09-10 12:02:18,806 WARN L175 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2018-09-10 12:02:19,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:02:19,504 INFO L93 Difference]: Finished difference Result 23103 states and 26434 transitions. [2018-09-10 12:02:19,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-10 12:02:19,505 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 651 [2018-09-10 12:02:19,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:02:19,535 INFO L225 Difference]: With dead ends: 23103 [2018-09-10 12:02:19,536 INFO L226 Difference]: Without dead ends: 13606 [2018-09-10 12:02:19,560 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2681 GetRequests, 2600 SyntacticMatches, 15 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=822, Invalid=3734, Unknown=0, NotChecked=0, Total=4556 [2018-09-10 12:02:19,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13606 states. [2018-09-10 12:02:19,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13606 to 12380. [2018-09-10 12:02:19,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12380 states. [2018-09-10 12:02:19,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12380 states to 12380 states and 13747 transitions. [2018-09-10 12:02:19,775 INFO L78 Accepts]: Start accepts. Automaton has 12380 states and 13747 transitions. Word has length 651 [2018-09-10 12:02:19,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:02:19,776 INFO L480 AbstractCegarLoop]: Abstraction has 12380 states and 13747 transitions. [2018-09-10 12:02:19,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-10 12:02:19,776 INFO L276 IsEmpty]: Start isEmpty. Operand 12380 states and 13747 transitions. [2018-09-10 12:02:19,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2018-09-10 12:02:19,797 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:02:19,798 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-10 12:02:19,798 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:02:19,799 INFO L82 PathProgramCache]: Analyzing trace with hash -939300679, now seen corresponding path program 1 times [2018-09-10 12:02:19,799 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:02:19,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:19,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 12:02:19,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:19,800 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:02:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 613 proven. 129 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-09-10 12:02:20,672 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:02:20,672 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:02:20,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:20,681 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:02:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:20,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:02:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 1015 proven. 2 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2018-09-10 12:02:21,313 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:02:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 613 proven. 129 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-09-10 12:02:21,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:02:21,867 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 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 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:02:21,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:21,884 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:02:22,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:22,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:02:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 1015 proven. 2 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2018-09-10 12:02:22,633 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:02:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 613 proven. 129 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-09-10 12:02:22,962 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:02:22,963 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-09-10 12:02:22,964 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:02:22,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 12:02:22,965 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 12:02:22,965 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-10 12:02:22,966 INFO L87 Difference]: Start difference. First operand 12380 states and 13747 transitions. Second operand 7 states. [2018-09-10 12:02:25,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:02:25,700 INFO L93 Difference]: Finished difference Result 29579 states and 35681 transitions. [2018-09-10 12:02:25,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-10 12:02:25,701 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 707 [2018-09-10 12:02:25,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:02:25,767 INFO L225 Difference]: With dead ends: 29579 [2018-09-10 12:02:25,767 INFO L226 Difference]: Without dead ends: 17390 [2018-09-10 12:02:25,809 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2844 GetRequests, 2829 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-09-10 12:02:25,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17390 states. [2018-09-10 12:02:26,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17390 to 16908. [2018-09-10 12:02:26,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16908 states. [2018-09-10 12:02:26,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16908 states to 16908 states and 19011 transitions. [2018-09-10 12:02:26,205 INFO L78 Accepts]: Start accepts. Automaton has 16908 states and 19011 transitions. Word has length 707 [2018-09-10 12:02:26,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:02:26,206 INFO L480 AbstractCegarLoop]: Abstraction has 16908 states and 19011 transitions. [2018-09-10 12:02:26,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 12:02:26,207 INFO L276 IsEmpty]: Start isEmpty. Operand 16908 states and 19011 transitions. [2018-09-10 12:02:26,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2018-09-10 12:02:26,230 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:02:26,230 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2018-09-10 12:02:26,231 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:02:26,231 INFO L82 PathProgramCache]: Analyzing trace with hash -208165032, now seen corresponding path program 1 times [2018-09-10 12:02:26,231 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:02:26,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:26,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:26,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:26,232 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:02:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:28,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2350 backedges. 894 proven. 857 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2018-09-10 12:02:28,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:02:28,229 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:02:28,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:28,239 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:02:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:28,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:02:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2350 backedges. 1435 proven. 2 refuted. 0 times theorem prover too weak. 913 trivial. 0 not checked. [2018-09-10 12:02:29,052 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:02:29,242 WARN L175 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-09-10 12:02:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2350 backedges. 887 proven. 129 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2018-09-10 12:02:30,300 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:02:30,300 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 18 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 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:02:30,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:30,320 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:02:30,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:30,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:02:31,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2350 backedges. 1427 proven. 10 refuted. 0 times theorem prover too weak. 913 trivial. 0 not checked. [2018-09-10 12:02:31,438 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:02:31,614 WARN L175 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2018-09-10 12:02:33,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2350 backedges. 387 proven. 1097 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2018-09-10 12:02:33,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:02:33,167 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 8, 8] total 28 [2018-09-10 12:02:33,167 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:02:33,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-10 12:02:33,169 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-10 12:02:33,169 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2018-09-10 12:02:33,170 INFO L87 Difference]: Start difference. First operand 16908 states and 19011 transitions. Second operand 17 states. [2018-09-10 12:02:41,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:02:41,955 INFO L93 Difference]: Finished difference Result 33743 states and 39406 transitions. [2018-09-10 12:02:41,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-10 12:02:41,955 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 814 [2018-09-10 12:02:41,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:02:42,003 INFO L225 Difference]: With dead ends: 33743 [2018-09-10 12:02:42,004 INFO L226 Difference]: Without dead ends: 16168 [2018-09-10 12:02:42,051 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3339 GetRequests, 3261 SyntacticMatches, 8 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1098, Invalid=4014, Unknown=0, NotChecked=0, Total=5112 [2018-09-10 12:02:42,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16168 states. [2018-09-10 12:02:42,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16168 to 15726. [2018-09-10 12:02:42,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15726 states. [2018-09-10 12:02:42,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15726 states to 15726 states and 17304 transitions. [2018-09-10 12:02:42,453 INFO L78 Accepts]: Start accepts. Automaton has 15726 states and 17304 transitions. Word has length 814 [2018-09-10 12:02:42,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:02:42,453 INFO L480 AbstractCegarLoop]: Abstraction has 15726 states and 17304 transitions. [2018-09-10 12:02:42,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-10 12:02:42,453 INFO L276 IsEmpty]: Start isEmpty. Operand 15726 states and 17304 transitions. [2018-09-10 12:02:42,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2018-09-10 12:02:42,469 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:02:42,469 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:02:42,470 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:02:42,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1812461801, now seen corresponding path program 1 times [2018-09-10 12:02:42,470 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:02:42,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:42,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:42,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:42,471 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:02:42,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:43,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 832 proven. 129 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2018-09-10 12:02:43,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:02:43,378 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:02:43,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:43,386 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:02:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:43,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:02:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 1359 proven. 2 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2018-09-10 12:02:43,939 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:02:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 832 proven. 129 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2018-09-10 12:02:44,504 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:02:44,504 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 20 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 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:02:44,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:44,520 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:02:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:45,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:02:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 1359 proven. 2 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2018-09-10 12:02:45,414 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:02:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 832 proven. 129 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2018-09-10 12:02:45,871 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:02:45,872 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 8 [2018-09-10 12:02:45,872 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:02:45,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:02:45,873 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:02:45,873 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-09-10 12:02:45,873 INFO L87 Difference]: Start difference. First operand 15726 states and 17304 transitions. Second operand 6 states. [2018-09-10 12:02:48,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:02:48,448 INFO L93 Difference]: Finished difference Result 32607 states and 35912 transitions. [2018-09-10 12:02:48,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 12:02:48,449 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 867 [2018-09-10 12:02:48,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:02:48,481 INFO L225 Difference]: With dead ends: 32607 [2018-09-10 12:02:48,481 INFO L226 Difference]: Without dead ends: 17072 [2018-09-10 12:02:48,507 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3481 GetRequests, 3468 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2018-09-10 12:02:48,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17072 states. [2018-09-10 12:02:48,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17072 to 16308. [2018-09-10 12:02:48,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16308 states. [2018-09-10 12:02:48,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16308 states to 16308 states and 17667 transitions. [2018-09-10 12:02:48,725 INFO L78 Accepts]: Start accepts. Automaton has 16308 states and 17667 transitions. Word has length 867 [2018-09-10 12:02:48,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:02:48,725 INFO L480 AbstractCegarLoop]: Abstraction has 16308 states and 17667 transitions. [2018-09-10 12:02:48,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:02:48,726 INFO L276 IsEmpty]: Start isEmpty. Operand 16308 states and 17667 transitions. [2018-09-10 12:02:48,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 924 [2018-09-10 12:02:48,736 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:02:48,736 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 6, 6, 6, 6, 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, 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] [2018-09-10 12:02:48,737 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:02:48,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1008860009, now seen corresponding path program 1 times [2018-09-10 12:02:48,737 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:02:48,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:48,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:48,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:48,738 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:02:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2591 backedges. 931 proven. 973 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2018-09-10 12:02:51,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:02:51,130 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:02:51,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:51,138 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:02:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:51,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:02:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2591 backedges. 1551 proven. 2 refuted. 0 times theorem prover too weak. 1038 trivial. 0 not checked. [2018-09-10 12:02:52,202 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:02:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2591 backedges. 947 proven. 129 refuted. 0 times theorem prover too weak. 1515 trivial. 0 not checked. [2018-09-10 12:02:52,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:02:52,917 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 22 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 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:02:52,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:52,940 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:02:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:53,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:02:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2591 backedges. 1546 proven. 25 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2018-09-10 12:02:54,019 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:02:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2591 backedges. 947 proven. 129 refuted. 0 times theorem prover too weak. 1515 trivial. 0 not checked. [2018-09-10 12:02:54,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:02:54,959 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6, 5, 5] total 22 [2018-09-10 12:02:54,959 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:02:54,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-10 12:02:54,960 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-10 12:02:54,961 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2018-09-10 12:02:54,961 INFO L87 Difference]: Start difference. First operand 16308 states and 17667 transitions. Second operand 17 states. [2018-09-10 12:02:57,290 WARN L175 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 36 [2018-09-10 12:02:58,010 WARN L175 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2018-09-10 12:02:58,899 WARN L175 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2018-09-10 12:02:59,970 WARN L175 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2018-09-10 12:03:04,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:03:04,697 INFO L93 Difference]: Finished difference Result 33124 states and 36883 transitions. [2018-09-10 12:03:04,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-10 12:03:04,698 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 923 [2018-09-10 12:03:04,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:03:04,740 INFO L225 Difference]: With dead ends: 33124 [2018-09-10 12:03:04,740 INFO L226 Difference]: Without dead ends: 17007 [2018-09-10 12:03:04,767 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3784 GetRequests, 3719 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=969, Invalid=3453, Unknown=0, NotChecked=0, Total=4422 [2018-09-10 12:03:04,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17007 states. [2018-09-10 12:03:04,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17007 to 16286. [2018-09-10 12:03:04,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16286 states. [2018-09-10 12:03:05,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16286 states to 16286 states and 17566 transitions. [2018-09-10 12:03:05,014 INFO L78 Accepts]: Start accepts. Automaton has 16286 states and 17566 transitions. Word has length 923 [2018-09-10 12:03:05,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:03:05,015 INFO L480 AbstractCegarLoop]: Abstraction has 16286 states and 17566 transitions. [2018-09-10 12:03:05,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-10 12:03:05,015 INFO L276 IsEmpty]: Start isEmpty. Operand 16286 states and 17566 transitions. [2018-09-10 12:03:05,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1045 [2018-09-10 12:03:05,028 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:03:05,029 INFO L376 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 6, 6, 6, 6, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:03:05,029 INFO L423 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:03:05,029 INFO L82 PathProgramCache]: Analyzing trace with hash -29720964, now seen corresponding path program 1 times [2018-09-10 12:03:05,029 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:03:05,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:03:05,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:05,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:03:05,031 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:03:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:06,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3225 backedges. 1728 proven. 6 refuted. 0 times theorem prover too weak. 1491 trivial. 0 not checked. [2018-09-10 12:03:06,615 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:03:06,616 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:03:06,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:06,632 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:03:07,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:07,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:03:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3225 backedges. 1728 proven. 6 refuted. 0 times theorem prover too weak. 1491 trivial. 0 not checked. [2018-09-10 12:03:07,496 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:03:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3225 backedges. 1728 proven. 129 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2018-09-10 12:03:08,463 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:03:08,463 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 24 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 24 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:03:08,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:08,479 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:03:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:09,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:03:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3225 backedges. 1728 proven. 6 refuted. 0 times theorem prover too weak. 1491 trivial. 0 not checked. [2018-09-10 12:03:09,609 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:03:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3225 backedges. 1728 proven. 129 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2018-09-10 12:03:10,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:03:10,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 7, 8] total 13 [2018-09-10 12:03:10,413 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:03:10,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-10 12:03:10,414 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-10 12:03:10,414 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-10 12:03:10,414 INFO L87 Difference]: Start difference. First operand 16286 states and 17566 transitions. Second operand 8 states. [2018-09-10 12:03:14,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:03:14,348 INFO L93 Difference]: Finished difference Result 37276 states and 40263 transitions. [2018-09-10 12:03:14,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-10 12:03:14,348 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1044 [2018-09-10 12:03:14,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:03:14,389 INFO L225 Difference]: With dead ends: 37276 [2018-09-10 12:03:14,389 INFO L226 Difference]: Without dead ends: 21181 [2018-09-10 12:03:14,413 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4200 GetRequests, 4176 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2018-09-10 12:03:14,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21181 states. [2018-09-10 12:03:14,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21181 to 20433. [2018-09-10 12:03:14,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20433 states. [2018-09-10 12:03:14,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20433 states to 20433 states and 21935 transitions. [2018-09-10 12:03:14,652 INFO L78 Accepts]: Start accepts. Automaton has 20433 states and 21935 transitions. Word has length 1044 [2018-09-10 12:03:14,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:03:14,652 INFO L480 AbstractCegarLoop]: Abstraction has 20433 states and 21935 transitions. [2018-09-10 12:03:14,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-10 12:03:14,652 INFO L276 IsEmpty]: Start isEmpty. Operand 20433 states and 21935 transitions. [2018-09-10 12:03:14,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1426 [2018-09-10 12:03:14,683 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:03:14,684 INFO L376 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 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, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:03:14,684 INFO L423 AbstractCegarLoop]: === Iteration 19 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:03:14,685 INFO L82 PathProgramCache]: Analyzing trace with hash -475359839, now seen corresponding path program 1 times [2018-09-10 12:03:14,685 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:03:14,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:03:14,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:14,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:03:14,686 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:03:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:15,430 WARN L175 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-09-10 12:03:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6354 backedges. 1261 proven. 3591 refuted. 0 times theorem prover too weak. 1502 trivial. 0 not checked. [2018-09-10 12:03:19,366 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:03:19,366 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:03:19,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:19,374 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:03:19,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:19,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:03:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6354 backedges. 3304 proven. 2 refuted. 0 times theorem prover too weak. 3048 trivial. 0 not checked. [2018-09-10 12:03:20,606 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:03:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6354 backedges. 1496 proven. 224 refuted. 0 times theorem prover too weak. 4634 trivial. 0 not checked. [2018-09-10 12:03:22,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:03:22,413 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 26 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 26 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:03:22,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:22,429 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:03:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:23,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:03:25,682 WARN L175 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 49 DAG size of output: 22 [2018-09-10 12:03:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6354 backedges. 4452 proven. 24 refuted. 0 times theorem prover too weak. 1878 trivial. 0 not checked. [2018-09-10 12:03:28,047 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:03:28,237 WARN L175 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2018-09-10 12:03:28,373 WARN L175 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2018-09-10 12:03:28,579 WARN L175 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-09-10 12:03:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6354 backedges. 732 proven. 3885 refuted. 0 times theorem prover too weak. 1737 trivial. 0 not checked. [2018-09-10 12:03:34,483 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:03:34,484 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5, 13, 14] total 44 [2018-09-10 12:03:34,484 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:03:34,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-10 12:03:34,486 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-10 12:03:34,487 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1647, Unknown=0, NotChecked=0, Total=1892 [2018-09-10 12:03:34,487 INFO L87 Difference]: Start difference. First operand 20433 states and 21935 transitions. Second operand 21 states. [2018-09-10 12:03:41,898 WARN L175 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-09-10 12:03:45,443 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2018-09-10 12:03:52,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:03:52,728 INFO L93 Difference]: Finished difference Result 38904 states and 41958 transitions. [2018-09-10 12:03:52,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-10 12:03:52,729 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1425 [2018-09-10 12:03:52,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:03:52,759 INFO L225 Difference]: With dead ends: 38904 [2018-09-10 12:03:52,759 INFO L226 Difference]: Without dead ends: 18336 [2018-09-10 12:03:52,787 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5864 GetRequests, 5734 SyntacticMatches, 6 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5097 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=1817, Invalid=13933, Unknown=0, NotChecked=0, Total=15750 [2018-09-10 12:03:52,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18336 states. [2018-09-10 12:03:52,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18336 to 16911. [2018-09-10 12:03:52,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16911 states. [2018-09-10 12:03:52,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16911 states to 16911 states and 17878 transitions. [2018-09-10 12:03:52,993 INFO L78 Accepts]: Start accepts. Automaton has 16911 states and 17878 transitions. Word has length 1425 [2018-09-10 12:03:52,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:03:52,993 INFO L480 AbstractCegarLoop]: Abstraction has 16911 states and 17878 transitions. [2018-09-10 12:03:52,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-10 12:03:52,994 INFO L276 IsEmpty]: Start isEmpty. Operand 16911 states and 17878 transitions. [2018-09-10 12:03:53,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1619 [2018-09-10 12:03:53,016 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:03:53,018 INFO L376 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 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, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:03:53,018 INFO L423 AbstractCegarLoop]: === Iteration 20 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:03:53,019 INFO L82 PathProgramCache]: Analyzing trace with hash 693513240, now seen corresponding path program 1 times [2018-09-10 12:03:53,019 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:03:53,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:03:53,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:53,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:03:53,020 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:03:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:54,719 WARN L175 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-10 12:03:55,061 WARN L175 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-10 12:03:55,415 WARN L175 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-09-10 12:03:58,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7830 backedges. 1756 proven. 4509 refuted. 0 times theorem prover too weak. 1565 trivial. 0 not checked. [2018-09-10 12:03:58,431 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:03:58,431 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:03:58,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:58,439 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:03:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:58,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:04:00,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7830 backedges. 2993 proven. 2 refuted. 0 times theorem prover too weak. 4835 trivial. 0 not checked. [2018-09-10 12:04:00,053 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:04:02,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7830 backedges. 1828 proven. 129 refuted. 0 times theorem prover too weak. 5873 trivial. 0 not checked. [2018-09-10 12:04:02,302 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:04:02,302 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 28 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 28 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:04:02,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:02,319 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:04:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:03,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:04:05,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7830 backedges. 2975 proven. 20 refuted. 0 times theorem prover too weak. 4835 trivial. 0 not checked. [2018-09-10 12:04:05,416 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:04:05,577 WARN L175 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-09-10 12:04:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7830 backedges. 739 proven. 2303 refuted. 0 times theorem prover too weak. 4788 trivial. 0 not checked. [2018-09-10 12:04:09,809 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:04:09,811 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 5, 5, 8, 8] total 35 [2018-09-10 12:04:09,812 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:04:09,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-10 12:04:09,815 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-10 12:04:09,815 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2018-09-10 12:04:09,815 INFO L87 Difference]: Start difference. First operand 16911 states and 17878 transitions. Second operand 24 states. [2018-09-10 12:04:18,302 WARN L175 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 Received shutdown request... [2018-09-10 12:04:29,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-10 12:04:29,060 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 12:04:29,065 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 12:04:29,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 12:04:29 BoogieIcfgContainer [2018-09-10 12:04:29,066 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 12:04:29,067 INFO L168 Benchmark]: Toolchain (without parser) took 230166.17 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 3.9 GB in the end (delta: -2.5 GB). Peak memory consumption was 180.6 MB. Max. memory is 7.1 GB. [2018-09-10 12:04:29,067 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-10 12:04:29,068 INFO L168 Benchmark]: CACSL2BoogieTranslator took 796.88 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. [2018-09-10 12:04:29,068 INFO L168 Benchmark]: Boogie Procedure Inliner took 152.00 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-10 12:04:29,069 INFO L168 Benchmark]: Boogie Preprocessor took 236.73 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 798.0 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -900.7 MB). Peak memory consumption was 33.1 MB. Max. memory is 7.1 GB. [2018-09-10 12:04:29,070 INFO L168 Benchmark]: RCFGBuilder took 3812.67 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: 160.7 MB). Peak memory consumption was 160.7 MB. Max. memory is 7.1 GB. [2018-09-10 12:04:29,070 INFO L168 Benchmark]: TraceAbstraction took 225160.18 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 3.9 GB in the end (delta: -1.8 GB). Peak memory consumption was 69.7 MB. Max. memory is 7.1 GB. [2018-09-10 12:04:29,074 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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 796.88 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 152.00 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 236.73 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 798.0 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -900.7 MB). Peak memory consumption was 33.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3812.67 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: 160.7 MB). Peak memory consumption was 160.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 225160.18 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 3.9 GB in the end (delta: -1.8 GB). Peak memory consumption was 69.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 157]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 157). Cancelled while BasicCegarLoop was constructing difference of abstraction (16911states) and FLOYD_HOARE automaton (currently 80 states, 24 states before enhancement), while ReachableStatesComputation was computing reachable states (34309 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 225.0s OverallTime, 20 OverallIterations, 13 TraceHistogramMax, 122.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2223 SDtfs, 54298 SDslu, 4604 SDs, 0 SdLazy, 66968 SolverSat, 9039 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 80.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43357 GetRequests, 42567 SyntacticMatches, 104 SemanticMatches, 686 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14608 ImplicationChecksByTransitivity, 47.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20433occurred in iteration=18, 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: 3.8s AutomataMinimizationTime, 19 MinimizatonAttempts, 8315 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 10.5s SatisfiabilityAnalysisTime, 72.4s InterpolantComputationTime, 32920 NumberOfCodeBlocks, 32920 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 54078 ConstructedInterpolants, 12 QuantifiedInterpolants, 235735457 SizeOfPredicates, 89 NumberOfNonLiveVariables, 30209 ConjunctsInSsa, 503 ConjunctsInUnsatCore, 74 InterpolantComputations, 9 PerfectInterpolantSequences, 132005/156258 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_label03_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_12-04-29-087.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label03_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_12-04-29-087.csv Completed graceful shutdown