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_label04_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 12:01:09,912 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 12:01:09,914 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 12:01:09,926 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 12:01:09,926 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 12:01:09,927 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 12:01:09,928 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 12:01:09,930 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 12:01:09,932 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 12:01:09,933 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 12:01:09,934 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 12:01:09,934 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 12:01:09,935 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 12:01:09,936 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 12:01:09,937 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 12:01:09,938 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 12:01:09,939 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 12:01:09,941 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 12:01:09,942 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 12:01:09,944 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 12:01:09,945 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 12:01:09,952 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 12:01:09,954 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 12:01:09,954 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 12:01:09,957 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 12:01:09,958 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 12:01:09,959 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 12:01:09,961 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 12:01:09,961 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 12:01:09,964 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 12:01:09,964 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 12:01:09,966 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-09-10 12:01:09,971 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 12:01:10,000 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 12:01:10,000 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 12:01:10,001 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 12:01:10,004 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 12:01:10,005 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 12:01:10,005 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 12:01:10,005 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 12:01:10,005 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 12:01:10,006 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 12:01:10,006 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 12:01:10,006 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 12:01:10,007 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 12:01:10,007 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 12:01:10,007 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 12:01:10,007 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 12:01:10,008 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 12:01:10,009 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 12:01:10,009 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 12:01:10,009 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 12:01:10,009 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 12:01:10,009 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 12:01:10,009 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 12:01:10,010 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 12:01:10,010 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 12:01:10,010 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 12:01:10,010 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 12:01:10,010 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 12:01:10,011 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 12:01:10,011 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 12:01:10,011 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 12:01:10,011 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 12:01:10,011 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 12:01:10,012 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 12:01:10,063 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 12:01:10,076 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 12:01:10,079 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 12:01:10,081 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 12:01:10,081 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 12:01:10,082 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label04_true-unreach-call_false-termination.c [2018-09-10 12:01:10,425 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c64ee361/1427cc7ec5564ee3b300b95b34d4a49c/FLAG3fc440dd9 [2018-09-10 12:01:10,667 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 12:01:10,669 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label04_true-unreach-call_false-termination.c [2018-09-10 12:01:10,709 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c64ee361/1427cc7ec5564ee3b300b95b34d4a49c/FLAG3fc440dd9 [2018-09-10 12:01:10,739 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c64ee361/1427cc7ec5564ee3b300b95b34d4a49c [2018-09-10 12:01:10,752 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 12:01:10,759 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 12:01:10,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 12:01:10,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 12:01:10,767 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 12:01:10,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:01:10" (1/1) ... [2018-09-10 12:01:10,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18aaf647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:01:10, skipping insertion in model container [2018-09-10 12:01:10,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:01:10" (1/1) ... [2018-09-10 12:01:11,046 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 12:01:11,364 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:01:11,383 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 12:01:11,539 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:01:11,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:01:11 WrapperNode [2018-09-10 12:01:11,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 12:01:11,587 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 12:01:11,588 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 12:01:11,588 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 12:01:11,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:01:11" (1/1) ... [2018-09-10 12:01:11,626 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:01:11" (1/1) ... [2018-09-10 12:01:11,715 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 12:01:11,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 12:01:11,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 12:01:11,716 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 12:01:11,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:01:11" (1/1) ... [2018-09-10 12:01:11,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:01:11" (1/1) ... [2018-09-10 12:01:11,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:01:11" (1/1) ... [2018-09-10 12:01:11,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:01:11" (1/1) ... [2018-09-10 12:01:11,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:01:11" (1/1) ... [2018-09-10 12:01:11,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:01:11" (1/1) ... [2018-09-10 12:01:12,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:01:11" (1/1) ... [2018-09-10 12:01:12,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 12:01:12,025 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 12:01:12,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 12:01:12,026 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 12:01:12,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:01:11" (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 12:01:12,101 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 12:01:12,101 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 12:01:12,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 12:01:12,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 12:01:12,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 12:01:12,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 12:01:12,102 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 12:01:12,104 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 12:01:15,995 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 12:01:15,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:01:15 BoogieIcfgContainer [2018-09-10 12:01:15,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 12:01:15,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 12:01:15,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 12:01:16,001 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 12:01:16,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 12:01:10" (1/3) ... [2018-09-10 12:01:16,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@278eac2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:01:16, skipping insertion in model container [2018-09-10 12:01:16,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:01:11" (2/3) ... [2018-09-10 12:01:16,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@278eac2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:01:16, skipping insertion in model container [2018-09-10 12:01:16,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:01:15" (3/3) ... [2018-09-10 12:01:16,005 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label04_true-unreach-call_false-termination.c [2018-09-10 12:01:16,015 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 12:01:16,025 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 12:01:16,080 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 12:01:16,081 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 12:01:16,081 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 12:01:16,082 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 12:01:16,082 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 12:01:16,082 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 12:01:16,082 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 12:01:16,082 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 12:01:16,083 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 12:01:16,110 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-09-10 12:01:16,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-10 12:01:16,120 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:01:16,122 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, 1] [2018-09-10 12:01:16,123 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 12:01:16,129 INFO L82 PathProgramCache]: Analyzing trace with hash -2113916641, now seen corresponding path program 1 times [2018-09-10 12:01:16,132 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:01:16,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:16,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:16,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:16,179 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:01:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:16,666 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 12:01:16,669 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:01:16,669 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 12:01:16,670 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:01:16,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:01:16,695 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:01:16,696 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:01:16,698 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-09-10 12:01:18,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:01:18,469 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-09-10 12:01:18,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:01:18,472 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2018-09-10 12:01:18,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:01:18,493 INFO L225 Difference]: With dead ends: 691 [2018-09-10 12:01:18,493 INFO L226 Difference]: Without dead ends: 434 [2018-09-10 12:01:18,501 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:01:18,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-09-10 12:01:18,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-09-10 12:01:18,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-09-10 12:01:18,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-09-10 12:01:18,627 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 59 [2018-09-10 12:01:18,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:01:18,628 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-09-10 12:01:18,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:01:18,629 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-09-10 12:01:18,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-10 12:01:18,639 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:01:18,640 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, 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 12:01:18,640 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 12:01:18,641 INFO L82 PathProgramCache]: Analyzing trace with hash 212276058, now seen corresponding path program 1 times [2018-09-10 12:01:18,641 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:01:18,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:18,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:18,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:18,643 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:01:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:01:19,076 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:01:19,076 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 12:01:19,077 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:01:19,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:01:19,079 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:01:19,079 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:01:19,079 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-09-10 12:01:22,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:01:22,832 INFO L93 Difference]: Finished difference Result 1588 states and 2935 transitions. [2018-09-10 12:01:22,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:01:22,833 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2018-09-10 12:01:22,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:01:22,845 INFO L225 Difference]: With dead ends: 1588 [2018-09-10 12:01:22,845 INFO L226 Difference]: Without dead ends: 1160 [2018-09-10 12:01:22,850 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-10 12:01:22,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2018-09-10 12:01:22,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1153. [2018-09-10 12:01:22,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1153 states. [2018-09-10 12:01:22,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1887 transitions. [2018-09-10 12:01:22,926 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1887 transitions. Word has length 129 [2018-09-10 12:01:22,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:01:22,927 INFO L480 AbstractCegarLoop]: Abstraction has 1153 states and 1887 transitions. [2018-09-10 12:01:22,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:01:22,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1887 transitions. [2018-09-10 12:01:22,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-10 12:01:22,933 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:01:22,934 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, 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 12:01:22,934 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 12:01:22,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1780705559, now seen corresponding path program 1 times [2018-09-10 12:01:22,937 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:01:22,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:22,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:22,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:22,939 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:01:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:23,143 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:01:23,144 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:01:23,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-10 12:01:23,144 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:01:23,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:01:23,145 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:01:23,145 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-10 12:01:23,145 INFO L87 Difference]: Start difference. First operand 1153 states and 1887 transitions. Second operand 5 states. [2018-09-10 12:01:26,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:01:26,071 INFO L93 Difference]: Finished difference Result 2716 states and 4601 transitions. [2018-09-10 12:01:26,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:01:26,076 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2018-09-10 12:01:26,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:01:26,092 INFO L225 Difference]: With dead ends: 2716 [2018-09-10 12:01:26,093 INFO L226 Difference]: Without dead ends: 1569 [2018-09-10 12:01:26,099 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-10 12:01:26,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2018-09-10 12:01:26,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1538. [2018-09-10 12:01:26,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1538 states. [2018-09-10 12:01:26,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 2356 transitions. [2018-09-10 12:01:26,173 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 2356 transitions. Word has length 130 [2018-09-10 12:01:26,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:01:26,173 INFO L480 AbstractCegarLoop]: Abstraction has 1538 states and 2356 transitions. [2018-09-10 12:01:26,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:01:26,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 2356 transitions. [2018-09-10 12:01:26,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-10 12:01:26,179 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:01:26,180 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:01:26,180 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 12:01:26,181 INFO L82 PathProgramCache]: Analyzing trace with hash 205801979, now seen corresponding path program 1 times [2018-09-10 12:01:26,182 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:01:26,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:26,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:26,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:26,184 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:01:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:26,437 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:01:26,438 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:01:26,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-10 12:01:26,438 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:01:26,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:01:26,439 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:01:26,439 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-10 12:01:26,440 INFO L87 Difference]: Start difference. First operand 1538 states and 2356 transitions. Second operand 5 states. [2018-09-10 12:01:29,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:01:29,360 INFO L93 Difference]: Finished difference Result 4906 states and 7504 transitions. [2018-09-10 12:01:29,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 12:01:29,365 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2018-09-10 12:01:29,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:01:29,387 INFO L225 Difference]: With dead ends: 4906 [2018-09-10 12:01:29,387 INFO L226 Difference]: Without dead ends: 3374 [2018-09-10 12:01:29,401 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 12:01:29,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3374 states. [2018-09-10 12:01:29,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3374 to 3263. [2018-09-10 12:01:29,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3263 states. [2018-09-10 12:01:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 4437 transitions. [2018-09-10 12:01:29,496 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 4437 transitions. Word has length 132 [2018-09-10 12:01:29,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:01:29,496 INFO L480 AbstractCegarLoop]: Abstraction has 3263 states and 4437 transitions. [2018-09-10 12:01:29,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:01:29,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 4437 transitions. [2018-09-10 12:01:29,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-09-10 12:01:29,503 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:01:29,503 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:01:29,504 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 12:01:29,504 INFO L82 PathProgramCache]: Analyzing trace with hash 2076110233, now seen corresponding path program 1 times [2018-09-10 12:01:29,504 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:01:29,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:29,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:29,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:29,506 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:01:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 176 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:01:30,295 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:01:30,296 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 12:01:30,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:30,312 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:01:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:30,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:01:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-09-10 12:01:31,076 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:01:31,330 WARN L175 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2018-09-10 12:01:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 104 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:01:31,972 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:01:31,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2018-09-10 12:01:31,973 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:01:31,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:01:31,974 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:01:31,974 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2018-09-10 12:01:31,974 INFO L87 Difference]: Start difference. First operand 3263 states and 4437 transitions. Second operand 5 states. [2018-09-10 12:01:35,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:01:35,105 INFO L93 Difference]: Finished difference Result 8194 states and 11071 transitions. [2018-09-10 12:01:35,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 12:01:35,105 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 217 [2018-09-10 12:01:35,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:01:35,128 INFO L225 Difference]: With dead ends: 8194 [2018-09-10 12:01:35,128 INFO L226 Difference]: Without dead ends: 4937 [2018-09-10 12:01:35,141 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 429 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2018-09-10 12:01:35,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4937 states. [2018-09-10 12:01:35,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4937 to 4239. [2018-09-10 12:01:35,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4239 states. [2018-09-10 12:01:35,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4239 states to 4239 states and 5642 transitions. [2018-09-10 12:01:35,261 INFO L78 Accepts]: Start accepts. Automaton has 4239 states and 5642 transitions. Word has length 217 [2018-09-10 12:01:35,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:01:35,262 INFO L480 AbstractCegarLoop]: Abstraction has 4239 states and 5642 transitions. [2018-09-10 12:01:35,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:01:35,262 INFO L276 IsEmpty]: Start isEmpty. Operand 4239 states and 5642 transitions. [2018-09-10 12:01:35,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-09-10 12:01:35,269 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:01:35,270 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:01:35,270 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 12:01:35,270 INFO L82 PathProgramCache]: Analyzing trace with hash 2122859501, now seen corresponding path program 1 times [2018-09-10 12:01:35,270 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:01:35,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:35,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:35,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:35,272 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:01:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:36,408 WARN L175 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-10 12:01:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 115 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:01:36,616 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:01:36,617 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 12:01:36,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:36,625 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:01:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:36,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:01:36,942 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-09-10 12:01:36,942 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:01:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 104 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:01:37,507 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:01:37,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 14 [2018-09-10 12:01:37,508 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:01:37,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:01:37,509 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:01:37,509 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2018-09-10 12:01:37,509 INFO L87 Difference]: Start difference. First operand 4239 states and 5642 transitions. Second operand 5 states. [2018-09-10 12:01:40,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:01:40,972 INFO L93 Difference]: Finished difference Result 12329 states and 16826 transitions. [2018-09-10 12:01:40,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 12:01:40,972 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2018-09-10 12:01:40,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:01:41,010 INFO L225 Difference]: With dead ends: 12329 [2018-09-10 12:01:41,010 INFO L226 Difference]: Without dead ends: 8096 [2018-09-10 12:01:41,038 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 481 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2018-09-10 12:01:41,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8096 states. [2018-09-10 12:01:41,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8096 to 8020. [2018-09-10 12:01:41,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8020 states. [2018-09-10 12:01:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8020 states to 8020 states and 10439 transitions. [2018-09-10 12:01:41,226 INFO L78 Accepts]: Start accepts. Automaton has 8020 states and 10439 transitions. Word has length 243 [2018-09-10 12:01:41,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:01:41,227 INFO L480 AbstractCegarLoop]: Abstraction has 8020 states and 10439 transitions. [2018-09-10 12:01:41,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:01:41,227 INFO L276 IsEmpty]: Start isEmpty. Operand 8020 states and 10439 transitions. [2018-09-10 12:01:41,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-09-10 12:01:41,242 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:01:41,243 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, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:01:41,243 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 12:01:41,243 INFO L82 PathProgramCache]: Analyzing trace with hash -267882291, now seen corresponding path program 1 times [2018-09-10 12:01:41,243 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:01:41,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:41,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:41,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:41,245 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:01:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:41,699 WARN L175 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-10 12:01:41,901 WARN L175 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-10 12:01:42,127 WARN L175 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-10 12:01:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 243 proven. 140 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:01:42,644 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:01:42,644 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 12:01:42,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:42,653 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:01:42,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:42,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:01:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 283 proven. 52 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-09-10 12:01:43,100 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:01:43,675 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 166 proven. 217 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:01:43,697 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:01:43,697 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 12:01:43,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:43,715 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:01:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:43,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:01:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 283 proven. 52 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-09-10 12:01:44,395 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:01:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 166 proven. 217 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:01:44,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:01:44,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8, 8, 8] total 26 [2018-09-10 12:01:44,993 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:01:44,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-10 12:01:44,994 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-10 12:01:44,995 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2018-09-10 12:01:44,995 INFO L87 Difference]: Start difference. First operand 8020 states and 10439 transitions. Second operand 15 states. [2018-09-10 12:01:50,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:01:50,599 INFO L93 Difference]: Finished difference Result 16427 states and 21565 transitions. [2018-09-10 12:01:50,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-10 12:01:50,600 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 302 [2018-09-10 12:01:50,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:01:50,633 INFO L225 Difference]: With dead ends: 16427 [2018-09-10 12:01:50,634 INFO L226 Difference]: Without dead ends: 8196 [2018-09-10 12:01:50,665 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1252 GetRequests, 1205 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2018-09-10 12:01:50,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8196 states. [2018-09-10 12:01:50,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8196 to 7209. [2018-09-10 12:01:50,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7209 states. [2018-09-10 12:01:50,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7209 states to 7209 states and 8756 transitions. [2018-09-10 12:01:50,835 INFO L78 Accepts]: Start accepts. Automaton has 7209 states and 8756 transitions. Word has length 302 [2018-09-10 12:01:50,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:01:50,835 INFO L480 AbstractCegarLoop]: Abstraction has 7209 states and 8756 transitions. [2018-09-10 12:01:50,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-10 12:01:50,836 INFO L276 IsEmpty]: Start isEmpty. Operand 7209 states and 8756 transitions. [2018-09-10 12:01:50,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-09-10 12:01:50,844 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:01:50,844 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, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:01:50,845 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 12:01:50,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1401021877, now seen corresponding path program 1 times [2018-09-10 12:01:50,845 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:01:50,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:50,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:50,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:01:50,847 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:01:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:51,217 WARN L175 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-09-10 12:01:52,221 WARN L175 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-10 12:01:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 363 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:01:52,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:01:52,425 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 12:01:52,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:52,433 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:01:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:52,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:01:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 305 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-09-10 12:01:52,727 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:01:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 305 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-09-10 12:01:53,121 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:01:53,122 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 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:01:53,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:01:53,137 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:01:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:01:53,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:01:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 301 proven. 6 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-09-10 12:01:53,459 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:01:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 305 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-09-10 12:01:53,708 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:01:53,709 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5, 5, 5] total 16 [2018-09-10 12:01:53,709 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:01:53,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-10 12:01:53,710 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-10 12:01:53,710 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2018-09-10 12:01:53,711 INFO L87 Difference]: Start difference. First operand 7209 states and 8756 transitions. Second operand 14 states. [2018-09-10 12:02:00,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:02:00,627 INFO L93 Difference]: Finished difference Result 17939 states and 22934 transitions. [2018-09-10 12:02:00,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-10 12:02:00,628 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 354 [2018-09-10 12:02:00,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:02:00,753 INFO L225 Difference]: With dead ends: 17939 [2018-09-10 12:02:00,754 INFO L226 Difference]: Without dead ends: 10736 [2018-09-10 12:02:00,782 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1487 GetRequests, 1440 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=445, Invalid=1717, Unknown=0, NotChecked=0, Total=2162 [2018-09-10 12:02:00,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10736 states. [2018-09-10 12:02:00,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10736 to 10496. [2018-09-10 12:02:00,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10496 states. [2018-09-10 12:02:00,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10496 states to 10496 states and 12389 transitions. [2018-09-10 12:02:00,985 INFO L78 Accepts]: Start accepts. Automaton has 10496 states and 12389 transitions. Word has length 354 [2018-09-10 12:02:00,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:02:00,985 INFO L480 AbstractCegarLoop]: Abstraction has 10496 states and 12389 transitions. [2018-09-10 12:02:00,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-10 12:02:00,986 INFO L276 IsEmpty]: Start isEmpty. Operand 10496 states and 12389 transitions. [2018-09-10 12:02:00,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2018-09-10 12:02:00,994 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:02:00,995 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:02:00,995 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 12:02:00,995 INFO L82 PathProgramCache]: Analyzing trace with hash 807909984, now seen corresponding path program 1 times [2018-09-10 12:02:00,996 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:02:00,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:00,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:00,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:00,997 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:02:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-09-10 12:02:01,260 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:02:01,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 12:02:01,260 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:02:01,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:02:01,261 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:02:01,261 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:02:01,261 INFO L87 Difference]: Start difference. First operand 10496 states and 12389 transitions. Second operand 3 states. [2018-09-10 12:02:03,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:02:03,995 INFO L93 Difference]: Finished difference Result 24373 states and 30079 transitions. [2018-09-10 12:02:03,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:02:03,998 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 365 [2018-09-10 12:02:03,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:02:04,056 INFO L225 Difference]: With dead ends: 24373 [2018-09-10 12:02:04,056 INFO L226 Difference]: Without dead ends: 13883 [2018-09-10 12:02:04,104 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:02:04,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13883 states. [2018-09-10 12:02:04,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13883 to 13869. [2018-09-10 12:02:04,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13869 states. [2018-09-10 12:02:04,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13869 states to 13869 states and 16425 transitions. [2018-09-10 12:02:04,407 INFO L78 Accepts]: Start accepts. Automaton has 13869 states and 16425 transitions. Word has length 365 [2018-09-10 12:02:04,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:02:04,408 INFO L480 AbstractCegarLoop]: Abstraction has 13869 states and 16425 transitions. [2018-09-10 12:02:04,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:02:04,408 INFO L276 IsEmpty]: Start isEmpty. Operand 13869 states and 16425 transitions. [2018-09-10 12:02:04,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2018-09-10 12:02:04,453 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:02:04,453 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, 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, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:02:04,453 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 12:02:04,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1681402431, now seen corresponding path program 1 times [2018-09-10 12:02:04,454 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:02:04,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:04,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:04,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:04,455 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:02:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 548 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-10 12:02:05,264 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:02:05,264 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:02:05,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:05,275 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:02:05,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:05,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:02:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 548 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-10 12:02:05,965 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:02:06,201 WARN L175 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-10 12:02:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 548 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-10 12:02:07,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:02:07,135 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 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:02:07,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:07,167 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:02:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:07,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:02:07,678 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 548 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-10 12:02:07,678 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:02:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 548 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-10 12:02:08,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:02:08,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-09-10 12:02:08,534 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:02:08,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 12:02:08,536 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 12:02:08,536 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-10 12:02:08,536 INFO L87 Difference]: Start difference. First operand 13869 states and 16425 transitions. Second operand 7 states. [2018-09-10 12:02:14,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:02:14,010 INFO L93 Difference]: Finished difference Result 34559 states and 49055 transitions. [2018-09-10 12:02:14,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-10 12:02:14,010 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 513 [2018-09-10 12:02:14,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:02:14,137 INFO L225 Difference]: With dead ends: 34559 [2018-09-10 12:02:14,137 INFO L226 Difference]: Without dead ends: 20696 [2018-09-10 12:02:14,236 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2068 GetRequests, 2053 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-09-10 12:02:14,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20696 states. [2018-09-10 12:02:14,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20696 to 20093. [2018-09-10 12:02:14,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20093 states. [2018-09-10 12:02:14,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20093 states to 20093 states and 25289 transitions. [2018-09-10 12:02:14,882 INFO L78 Accepts]: Start accepts. Automaton has 20093 states and 25289 transitions. Word has length 513 [2018-09-10 12:02:14,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:02:14,883 INFO L480 AbstractCegarLoop]: Abstraction has 20093 states and 25289 transitions. [2018-09-10 12:02:14,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 12:02:14,883 INFO L276 IsEmpty]: Start isEmpty. Operand 20093 states and 25289 transitions. [2018-09-10 12:02:14,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2018-09-10 12:02:14,919 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:02:14,920 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, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:02:14,920 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 12:02:14,920 INFO L82 PathProgramCache]: Analyzing trace with hash 638746394, now seen corresponding path program 1 times [2018-09-10 12:02:14,921 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:02:14,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:14,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:14,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:14,922 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:02:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:15,471 WARN L175 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-10 12:02:15,663 WARN L175 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-10 12:02:15,877 WARN L175 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-10 12:02:16,144 WARN L175 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-09-10 12:02:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 564 proven. 369 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-09-10 12:02:16,761 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:02:16,761 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:02:16,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:16,772 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:02:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:16,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:02:17,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 759 proven. 2 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2018-09-10 12:02:17,437 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:02:17,693 WARN L175 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-10 12:02:18,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 531 proven. 73 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2018-09-10 12:02:18,075 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:02:18,076 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:02:18,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:18,093 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:02:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:18,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:02:18,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 605 proven. 156 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2018-09-10 12:02:18,943 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:02:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 296 proven. 513 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-10 12:02:19,773 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:02:19,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 8, 8] total 16 [2018-09-10 12:02:19,774 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:02:19,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-10 12:02:19,775 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-10 12:02:19,775 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2018-09-10 12:02:19,776 INFO L87 Difference]: Start difference. First operand 20093 states and 25289 transitions. Second operand 13 states. [2018-09-10 12:02:21,371 WARN L175 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2018-09-10 12:02:23,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:02:23,725 INFO L93 Difference]: Finished difference Result 40710 states and 54219 transitions. [2018-09-10 12:02:23,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-10 12:02:23,726 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 523 [2018-09-10 12:02:23,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:02:23,869 INFO L225 Difference]: With dead ends: 40710 [2018-09-10 12:02:23,869 INFO L226 Difference]: Without dead ends: 20404 [2018-09-10 12:02:23,984 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2122 GetRequests, 2081 SyntacticMatches, 17 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2018-09-10 12:02:23,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20404 states. [2018-09-10 12:02:24,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20404 to 19819. [2018-09-10 12:02:24,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19819 states. [2018-09-10 12:02:24,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19819 states to 19819 states and 24221 transitions. [2018-09-10 12:02:24,635 INFO L78 Accepts]: Start accepts. Automaton has 19819 states and 24221 transitions. Word has length 523 [2018-09-10 12:02:24,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:02:24,636 INFO L480 AbstractCegarLoop]: Abstraction has 19819 states and 24221 transitions. [2018-09-10 12:02:24,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-10 12:02:24,636 INFO L276 IsEmpty]: Start isEmpty. Operand 19819 states and 24221 transitions. [2018-09-10 12:02:24,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2018-09-10 12:02:24,676 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:02:24,676 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, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2018-09-10 12:02:24,676 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 12:02:24,677 INFO L82 PathProgramCache]: Analyzing trace with hash -2041458322, now seen corresponding path program 1 times [2018-09-10 12:02:24,677 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:02:24,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:24,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:24,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:24,678 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:02:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:25,078 WARN L175 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-09-10 12:02:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 551 proven. 519 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-09-10 12:02:26,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:02:26,229 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:02:26,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:26,236 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:02:26,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:26,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:02:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 759 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2018-09-10 12:02:26,712 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:02:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 531 proven. 73 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2018-09-10 12:02:27,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:02:27,477 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:02:27,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:27,493 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:02:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:27,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:02:28,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 506 proven. 6 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2018-09-10 12:02:28,353 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:02:28,528 WARN L175 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-09-10 12:02:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 284 proven. 276 refuted. 0 times theorem prover too weak. 579 trivial. 0 not checked. [2018-09-10 12:02:30,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:02:30,504 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5, 5, 5] total 28 [2018-09-10 12:02:30,504 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:02:30,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-10 12:02:30,505 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-10 12:02:30,505 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2018-09-10 12:02:30,506 INFO L87 Difference]: Start difference. First operand 19819 states and 24221 transitions. Second operand 21 states. [2018-09-10 12:02:39,612 WARN L175 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2018-09-10 12:02:41,259 WARN L175 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2018-09-10 12:02:41,491 WARN L175 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2018-09-10 12:02:44,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:02:44,725 INFO L93 Difference]: Finished difference Result 38744 states and 49125 transitions. [2018-09-10 12:02:44,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-10 12:02:44,726 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 549 [2018-09-10 12:02:44,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:02:44,810 INFO L225 Difference]: With dead ends: 38744 [2018-09-10 12:02:44,811 INFO L226 Difference]: Without dead ends: 18931 [2018-09-10 12:02:44,911 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2312 GetRequests, 2230 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1877 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1204, Invalid=5602, Unknown=0, NotChecked=0, Total=6806 [2018-09-10 12:02:44,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18931 states. [2018-09-10 12:02:45,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18931 to 17871. [2018-09-10 12:02:45,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17871 states. [2018-09-10 12:02:45,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17871 states to 17871 states and 20643 transitions. [2018-09-10 12:02:45,281 INFO L78 Accepts]: Start accepts. Automaton has 17871 states and 20643 transitions. Word has length 549 [2018-09-10 12:02:45,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:02:45,282 INFO L480 AbstractCegarLoop]: Abstraction has 17871 states and 20643 transitions. [2018-09-10 12:02:45,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-10 12:02:45,282 INFO L276 IsEmpty]: Start isEmpty. Operand 17871 states and 20643 transitions. [2018-09-10 12:02:45,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2018-09-10 12:02:45,288 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:02:45,289 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, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:02:45,289 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 12:02:45,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2040026589, now seen corresponding path program 1 times [2018-09-10 12:02:45,289 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:02:45,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:45,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:45,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:45,290 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:02:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:46,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 774 proven. 343 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-09-10 12:02:46,047 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:02:46,047 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:02:46,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:46,055 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:02:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:46,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:02:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 563 proven. 2 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2018-09-10 12:02:46,975 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:02:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 563 proven. 2 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2018-09-10 12:02:47,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:02:47,681 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:02:47,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:47,700 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:02:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:48,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:02:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 565 proven. 18 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-09-10 12:02:48,712 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:02:49,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 563 proven. 2 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2018-09-10 12:02:49,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:02:49,281 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 6, 5] total 23 [2018-09-10 12:02:49,281 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:02:49,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-10 12:02:49,282 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-10 12:02:49,282 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2018-09-10 12:02:49,282 INFO L87 Difference]: Start difference. First operand 17871 states and 20643 transitions. Second operand 15 states. [2018-09-10 12:03:01,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:03:01,021 INFO L93 Difference]: Finished difference Result 37508 states and 48798 transitions. [2018-09-10 12:03:01,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-10 12:03:01,021 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 554 [2018-09-10 12:03:01,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:03:01,205 INFO L225 Difference]: With dead ends: 37508 [2018-09-10 12:03:01,205 INFO L226 Difference]: Without dead ends: 19643 [2018-09-10 12:03:01,317 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2318 GetRequests, 2241 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1821 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=903, Invalid=4797, Unknown=0, NotChecked=0, Total=5700 [2018-09-10 12:03:01,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19643 states. [2018-09-10 12:03:01,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19643 to 18744. [2018-09-10 12:03:01,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18744 states. [2018-09-10 12:03:01,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18744 states to 18744 states and 23315 transitions. [2018-09-10 12:03:01,955 INFO L78 Accepts]: Start accepts. Automaton has 18744 states and 23315 transitions. Word has length 554 [2018-09-10 12:03:01,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:03:01,955 INFO L480 AbstractCegarLoop]: Abstraction has 18744 states and 23315 transitions. [2018-09-10 12:03:01,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-10 12:03:01,955 INFO L276 IsEmpty]: Start isEmpty. Operand 18744 states and 23315 transitions. [2018-09-10 12:03:01,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 674 [2018-09-10 12:03:01,972 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:03:01,972 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, 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, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:03:01,973 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 12:03:01,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1959265106, now seen corresponding path program 1 times [2018-09-10 12:03:01,973 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:03:01,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:03:01,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:01,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:03:01,974 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:03:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 718 proven. 2 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2018-09-10 12:03:02,553 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:03:02,553 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:03:02,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:02,563 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:03:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:02,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:03:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 718 proven. 2 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2018-09-10 12:03:03,082 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:03:03,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 718 proven. 2 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2018-09-10 12:03:03,615 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:03:03,615 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:03:03,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:03,631 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:03:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:04,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:03:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 718 proven. 2 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2018-09-10 12:03:04,250 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:03:04,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 718 proven. 2 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2018-09-10 12:03:04,545 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:03:04,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-09-10 12:03:04,546 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:03:04,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 12:03:04,547 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 12:03:04,547 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-10 12:03:04,547 INFO L87 Difference]: Start difference. First operand 18744 states and 23315 transitions. Second operand 7 states. [2018-09-10 12:03:06,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:03:06,927 INFO L93 Difference]: Finished difference Result 38838 states and 48576 transitions. [2018-09-10 12:03:06,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-10 12:03:06,928 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 673 [2018-09-10 12:03:06,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:03:07,028 INFO L225 Difference]: With dead ends: 38838 [2018-09-10 12:03:07,029 INFO L226 Difference]: Without dead ends: 20100 [2018-09-10 12:03:07,158 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2708 GetRequests, 2693 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-09-10 12:03:07,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20100 states. [2018-09-10 12:03:07,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20100 to 19968. [2018-09-10 12:03:07,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19968 states. [2018-09-10 12:03:07,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19968 states to 19968 states and 24092 transitions. [2018-09-10 12:03:07,675 INFO L78 Accepts]: Start accepts. Automaton has 19968 states and 24092 transitions. Word has length 673 [2018-09-10 12:03:07,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:03:07,676 INFO L480 AbstractCegarLoop]: Abstraction has 19968 states and 24092 transitions. [2018-09-10 12:03:07,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 12:03:07,676 INFO L276 IsEmpty]: Start isEmpty. Operand 19968 states and 24092 transitions. [2018-09-10 12:03:07,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 769 [2018-09-10 12:03:07,688 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:03:07,688 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:03:07,689 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 12:03:07,689 INFO L82 PathProgramCache]: Analyzing trace with hash -75156724, now seen corresponding path program 1 times [2018-09-10 12:03:07,689 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:03:07,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:03:07,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:07,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:03:07,690 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:03:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:08,564 WARN L175 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-10 12:03:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1818 backedges. 684 proven. 765 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2018-09-10 12:03:10,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:03:10,424 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:03:10,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:10,432 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:03:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:10,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:03:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1818 backedges. 1308 proven. 2 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2018-09-10 12:03:11,094 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:03:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1818 backedges. 685 proven. 188 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2018-09-10 12:03:11,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:03:11,822 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:03:11,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:11,839 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:03:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:12,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:03:12,560 WARN L175 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2018-09-10 12:03:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1818 backedges. 802 proven. 50 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2018-09-10 12:03:13,356 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:03:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1818 backedges. 850 proven. 2 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2018-09-10 12:03:15,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:03:15,814 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5, 6, 6] total 28 [2018-09-10 12:03:15,814 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:03:15,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-10 12:03:15,816 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-10 12:03:15,816 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2018-09-10 12:03:15,816 INFO L87 Difference]: Start difference. First operand 19968 states and 24092 transitions. Second operand 18 states. [2018-09-10 12:03:16,908 WARN L175 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2018-09-10 12:03:18,679 WARN L175 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2018-09-10 12:03:22,686 WARN L175 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 24 [2018-09-10 12:03:25,422 WARN L175 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2018-09-10 12:03:27,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:03:27,682 INFO L93 Difference]: Finished difference Result 42039 states and 51231 transitions. [2018-09-10 12:03:27,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-10 12:03:27,682 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 768 [2018-09-10 12:03:27,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:03:27,733 INFO L225 Difference]: With dead ends: 42039 [2018-09-10 12:03:27,734 INFO L226 Difference]: Without dead ends: 22077 [2018-09-10 12:03:27,795 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3155 GetRequests, 3086 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=861, Invalid=3969, Unknown=0, NotChecked=0, Total=4830 [2018-09-10 12:03:27,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22077 states. [2018-09-10 12:03:28,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22077 to 21344. [2018-09-10 12:03:28,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21344 states. [2018-09-10 12:03:28,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21344 states to 21344 states and 24179 transitions. [2018-09-10 12:03:28,174 INFO L78 Accepts]: Start accepts. Automaton has 21344 states and 24179 transitions. Word has length 768 [2018-09-10 12:03:28,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:03:28,175 INFO L480 AbstractCegarLoop]: Abstraction has 21344 states and 24179 transitions. [2018-09-10 12:03:28,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-10 12:03:28,175 INFO L276 IsEmpty]: Start isEmpty. Operand 21344 states and 24179 transitions. [2018-09-10 12:03:28,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2018-09-10 12:03:28,182 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:03:28,182 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, 7, 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, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:03:28,183 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 12:03:28,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1116476533, now seen corresponding path program 1 times [2018-09-10 12:03:28,183 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:03:28,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:03:28,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:28,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:03:28,184 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:03:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:28,645 WARN L175 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:03:29,339 WARN L175 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-09-10 12:03:29,677 WARN L175 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2018-09-10 12:03:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 726 proven. 581 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2018-09-10 12:03:30,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:03:30,706 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:03:30,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:30,714 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:03:30,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:30,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:03:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 1135 proven. 2 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-09-10 12:03:31,585 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:03:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 838 proven. 73 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2018-09-10 12:03:33,034 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:03:33,034 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:03:33,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:33,058 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:03:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:33,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:03:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 1135 proven. 2 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-09-10 12:03:34,136 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:03:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 838 proven. 73 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2018-09-10 12:03:35,675 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:03:35,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 5, 5] total 24 [2018-09-10 12:03:35,676 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:03:35,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-10 12:03:35,677 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-10 12:03:35,677 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2018-09-10 12:03:35,677 INFO L87 Difference]: Start difference. First operand 21344 states and 24179 transitions. Second operand 17 states. [2018-09-10 12:03:43,389 WARN L175 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2018-09-10 12:03:47,398 WARN L175 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2018-09-10 12:03:51,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:03:51,134 INFO L93 Difference]: Finished difference Result 44066 states and 50508 transitions. [2018-09-10 12:03:51,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-10 12:03:51,135 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 795 [2018-09-10 12:03:51,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:03:51,187 INFO L225 Difference]: With dead ends: 44066 [2018-09-10 12:03:51,188 INFO L226 Difference]: Without dead ends: 22913 [2018-09-10 12:03:51,245 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3340 GetRequests, 3233 SyntacticMatches, 6 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3563 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1828, Invalid=8678, Unknown=0, NotChecked=0, Total=10506 [2018-09-10 12:03:51,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22913 states. [2018-09-10 12:03:51,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22913 to 22004. [2018-09-10 12:03:51,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22004 states. [2018-09-10 12:03:51,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22004 states to 22004 states and 23998 transitions. [2018-09-10 12:03:51,602 INFO L78 Accepts]: Start accepts. Automaton has 22004 states and 23998 transitions. Word has length 795 [2018-09-10 12:03:51,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:03:51,602 INFO L480 AbstractCegarLoop]: Abstraction has 22004 states and 23998 transitions. [2018-09-10 12:03:51,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-10 12:03:51,603 INFO L276 IsEmpty]: Start isEmpty. Operand 22004 states and 23998 transitions. [2018-09-10 12:03:51,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 851 [2018-09-10 12:03:51,610 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:03:51,611 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, 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, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:03:51,611 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 12:03:51,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1762840799, now seen corresponding path program 1 times [2018-09-10 12:03:51,612 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:03:51,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:03:51,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:51,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:03:51,612 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:03:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:54,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2357 backedges. 671 proven. 1346 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2018-09-10 12:03:54,407 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:03:54,407 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:03:54,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:54,415 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:03:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:54,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:03:57,086 WARN L175 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-09-10 12:03:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2357 backedges. 939 proven. 50 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2018-09-10 12:03:57,553 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:04:03,788 WARN L175 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 39 DAG size of output: 15 [2018-09-10 12:04:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2357 backedges. 987 proven. 2 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2018-09-10 12:04:06,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:04:06,152 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:04:06,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:06,168 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:04:06,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:06,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:04:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2357 backedges. 939 proven. 50 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2018-09-10 12:04:10,530 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:04:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2357 backedges. 987 proven. 2 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2018-09-10 12:04:15,918 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:04:15,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 6, 6, 6, 6] total 29 [2018-09-10 12:04:15,919 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:04:15,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-10 12:04:15,921 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-10 12:04:15,921 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=684, Unknown=3, NotChecked=0, Total=812 [2018-09-10 12:04:15,922 INFO L87 Difference]: Start difference. First operand 22004 states and 23998 transitions. Second operand 25 states. [2018-09-10 12:04:18,958 WARN L175 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2018-09-10 12:04:24,045 WARN L175 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2018-09-10 12:04:25,411 WARN L175 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2018-09-10 12:04:31,598 WARN L175 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2018-09-10 12:04:33,170 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2018-09-10 12:04:34,919 WARN L175 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2018-09-10 12:04:35,273 WARN L175 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2018-09-10 12:04:40,730 WARN L175 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2018-09-10 12:04:43,182 WARN L175 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2018-09-10 12:04:43,612 WARN L175 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2018-09-10 12:04:49,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:04:49,003 INFO L93 Difference]: Finished difference Result 49368 states and 54195 transitions. [2018-09-10 12:04:49,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-10 12:04:49,004 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 850 [2018-09-10 12:04:49,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:04:49,057 INFO L225 Difference]: With dead ends: 49368 [2018-09-10 12:04:49,057 INFO L226 Difference]: Without dead ends: 27555 [2018-09-10 12:04:49,085 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3576 GetRequests, 3448 SyntacticMatches, 7 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5408 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=2907, Invalid=12096, Unknown=3, NotChecked=0, Total=15006 [2018-09-10 12:04:49,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27555 states. [2018-09-10 12:04:49,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27555 to 26858. [2018-09-10 12:04:49,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26858 states. [2018-09-10 12:04:49,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26858 states to 26858 states and 29233 transitions. [2018-09-10 12:04:49,423 INFO L78 Accepts]: Start accepts. Automaton has 26858 states and 29233 transitions. Word has length 850 [2018-09-10 12:04:49,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:04:49,424 INFO L480 AbstractCegarLoop]: Abstraction has 26858 states and 29233 transitions. [2018-09-10 12:04:49,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-10 12:04:49,424 INFO L276 IsEmpty]: Start isEmpty. Operand 26858 states and 29233 transitions. [2018-09-10 12:04:49,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 970 [2018-09-10 12:04:49,433 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:04:49,434 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, 8, 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, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:04:49,434 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 12:04:49,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1247220342, now seen corresponding path program 1 times [2018-09-10 12:04:49,435 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:04:49,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:04:49,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:49,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:04:49,436 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:04:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2639 backedges. 494 proven. 1425 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2018-09-10 12:04:52,907 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:04:52,907 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:04:52,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:52,916 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:04:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:53,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:05:01,960 WARN L175 SmtUtils]: Spent 7.89 s on a formula simplification. DAG size of input: 864 DAG size of output: 28 Received shutdown request... [2018-09-10 12:05:06,577 WARN L183 SmtUtils]: Removed 20 from assertion stack [2018-09-10 12:05:06,577 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-10 12:05:06,778 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:05:06,779 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 12:05:06,784 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 12:05:06,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 12:05:06 BoogieIcfgContainer [2018-09-10 12:05:06,784 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 12:05:06,785 INFO L168 Benchmark]: Toolchain (without parser) took 236032.17 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 2.5 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-09-10 12:05:06,786 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-10 12:05:06,786 INFO L168 Benchmark]: CACSL2BoogieTranslator took 826.96 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2018-09-10 12:05:06,787 INFO L168 Benchmark]: Boogie Procedure Inliner took 127.98 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 12:05:06,788 INFO L168 Benchmark]: Boogie Preprocessor took 309.28 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 761.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -861.5 MB). Peak memory consumption was 33.1 MB. Max. memory is 7.1 GB. [2018-09-10 12:05:06,790 INFO L168 Benchmark]: RCFGBuilder took 3970.65 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 142.8 MB). Peak memory consumption was 142.8 MB. Max. memory is 7.1 GB. [2018-09-10 12:05:06,790 INFO L168 Benchmark]: TraceAbstraction took 230787.19 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 2.5 GB in the end (delta: -457.1 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-09-10 12:05:06,802 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 826.96 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 127.98 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 309.28 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 761.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -861.5 MB). Peak memory consumption was 33.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3970.65 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 142.8 MB). Peak memory consumption was 142.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 230787.19 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 2.5 GB in the end (delta: -457.1 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 160]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 160). Cancelled while BasicCegarLoop was analyzing trace of length 970 with TraceHistMax 8, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 305. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 230.7s OverallTime, 18 OverallIterations, 8 TraceHistogramMax, 133.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1910 SDtfs, 50780 SDslu, 5159 SDs, 0 SdLazy, 65389 SolverSat, 9422 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 88.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25322 GetRequests, 24633 SyntacticMatches, 55 SemanticMatches, 634 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15445 ImplicationChecksByTransitivity, 55.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26858occurred in iteration=17, 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: 5.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 7782 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 6.1s SatisfiabilityAnalysisTime, 60.1s InterpolantComputationTime, 19378 NumberOfCodeBlocks, 19378 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 31539 ConstructedInterpolants, 431 QuantifiedInterpolants, 101336221 SizeOfPredicates, 63 NumberOfNonLiveVariables, 18407 ConjunctsInSsa, 310 ConjunctsInUnsatCore, 61 InterpolantComputations, 7 PerfectInterpolantSequences, 57372/63880 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_label04_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_12-05-06-817.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label04_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_12-05-06-817.csv Completed graceful shutdown