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-ToothlessTaipan_OCT-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label36_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-11 22:37:13,129 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-11 22:37:13,131 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-11 22:37:13,143 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-11 22:37:13,144 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-11 22:37:13,145 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-11 22:37:13,146 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-11 22:37:13,148 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-11 22:37:13,150 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-11 22:37:13,151 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-11 22:37:13,152 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-11 22:37:13,152 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-11 22:37:13,153 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-11 22:37:13,154 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-11 22:37:13,155 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-11 22:37:13,156 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-11 22:37:13,157 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-11 22:37:13,159 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-11 22:37:13,161 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-11 22:37:13,162 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-11 22:37:13,164 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-11 22:37:13,165 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-11 22:37:13,167 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-11 22:37:13,168 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-11 22:37:13,168 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-11 22:37:13,169 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-11 22:37:13,170 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-11 22:37:13,171 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-11 22:37:13,172 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-11 22:37:13,176 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-11 22:37:13,176 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-11 22:37:13,177 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-11 22:37:13,177 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-11 22:37:13,178 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-11 22:37:13,179 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-11 22:37:13,180 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-11 22:37:13,180 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-ToothlessTaipan_OCT-OldIcfg.epf [2018-09-11 22:37:13,205 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-11 22:37:13,206 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-11 22:37:13,207 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-11 22:37:13,207 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-11 22:37:13,207 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-11 22:37:13,207 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-11 22:37:13,213 INFO L133 SettingsManager]: * Congruence Domain=false [2018-09-11 22:37:13,213 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-11 22:37:13,213 INFO L133 SettingsManager]: * Abstract domain=OctagonDomain [2018-09-11 22:37:13,213 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-11 22:37:13,214 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-11 22:37:13,214 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-11 22:37:13,215 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-11 22:37:13,215 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-11 22:37:13,215 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-11 22:37:13,215 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-11 22:37:13,215 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-11 22:37:13,216 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-11 22:37:13,216 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-11 22:37:13,216 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-11 22:37:13,216 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-11 22:37:13,217 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-11 22:37:13,217 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-11 22:37:13,217 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-11 22:37:13,217 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-11 22:37:13,218 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-11 22:37:13,218 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-11 22:37:13,218 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-11 22:37:13,218 INFO L133 SettingsManager]: * Trace refinement strategy=TOOTHLESS_TAIPAN [2018-09-11 22:37:13,218 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-11 22:37:13,219 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-11 22:37:13,219 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-11 22:37:13,219 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-11 22:37:13,219 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-11 22:37:13,267 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-11 22:37:13,279 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-11 22:37:13,283 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-11 22:37:13,285 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-11 22:37:13,285 INFO L276 PluginConnector]: CDTParser initialized [2018-09-11 22:37:13,286 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label36_true-unreach-call_false-termination.c [2018-09-11 22:37:13,611 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92e3955b9/e08fa44107e74c2cac38842acd5b4919/FLAGbd63e66bf [2018-09-11 22:37:13,947 INFO L276 CDTParser]: Found 1 translation units. [2018-09-11 22:37:13,948 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label36_true-unreach-call_false-termination.c [2018-09-11 22:37:13,970 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92e3955b9/e08fa44107e74c2cac38842acd5b4919/FLAGbd63e66bf [2018-09-11 22:37:13,988 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92e3955b9/e08fa44107e74c2cac38842acd5b4919 [2018-09-11 22:37:13,999 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-11 22:37:14,002 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-11 22:37:14,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-11 22:37:14,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-11 22:37:14,013 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-11 22:37:14,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 10:37:13" (1/1) ... [2018-09-11 22:37:14,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18657f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 10:37:14, skipping insertion in model container [2018-09-11 22:37:14,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 10:37:13" (1/1) ... [2018-09-11 22:37:14,219 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-11 22:37:14,557 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-11 22:37:14,581 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-11 22:37:14,758 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-11 22:37:14,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 10:37:14 WrapperNode [2018-09-11 22:37:14,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-11 22:37:14,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-11 22:37:14,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-11 22:37:14,819 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-11 22:37:14,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 10:37:14" (1/1) ... [2018-09-11 22:37:14,866 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 10:37:14" (1/1) ... [2018-09-11 22:37:14,958 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-11 22:37:14,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-11 22:37:14,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-11 22:37:14,959 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-11 22:37:14,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 10:37:14" (1/1) ... [2018-09-11 22:37:14,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 10:37:14" (1/1) ... [2018-09-11 22:37:14,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 10:37:14" (1/1) ... [2018-09-11 22:37:14,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 10:37:14" (1/1) ... [2018-09-11 22:37:15,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 10:37:14" (1/1) ... [2018-09-11 22:37:15,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 10:37:14" (1/1) ... [2018-09-11 22:37:15,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 10:37:14" (1/1) ... [2018-09-11 22:37:15,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-11 22:37:15,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-11 22:37:15,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-11 22:37:15,233 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-11 22:37:15,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 10:37:14" (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 [2018-09-11 22:37:15,306 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 [2018-09-11 22:37:15,306 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 [2018-09-11 22:37:15,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-11 22:37:15,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-11 22:37:15,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-11 22:37:15,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-11 22:37:15,307 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-11 22:37:15,307 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-11 22:37:18,894 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-11 22:37:18,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 10:37:18 BoogieIcfgContainer [2018-09-11 22:37:18,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-11 22:37:18,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-11 22:37:18,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-11 22:37:18,899 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-11 22:37:18,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 10:37:13" (1/3) ... [2018-09-11 22:37:18,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15325116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 10:37:18, skipping insertion in model container [2018-09-11 22:37:18,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 10:37:14" (2/3) ... [2018-09-11 22:37:18,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15325116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 10:37:18, skipping insertion in model container [2018-09-11 22:37:18,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 10:37:18" (3/3) ... [2018-09-11 22:37:18,903 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label36_true-unreach-call_false-termination.c [2018-09-11 22:37:18,913 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-11 22:37:18,923 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-11 22:37:18,975 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-11 22:37:18,976 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-11 22:37:18,976 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-11 22:37:18,977 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-11 22:37:18,977 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-11 22:37:18,977 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-11 22:37:18,977 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-11 22:37:18,977 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-11 22:37:18,978 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-11 22:37:19,005 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-09-11 22:37:19,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-11 22:37:19,015 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 22:37:19,016 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] [2018-09-11 22:37:19,017 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]=== [2018-09-11 22:37:19,023 INFO L82 PathProgramCache]: Analyzing trace with hash 113942991, now seen corresponding path program 1 times [2018-09-11 22:37:19,025 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 22:37:19,026 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 56 with the following transitions: [2018-09-11 22:37:19,029 INFO L202 CegarAbsIntRunner]: [0], [7], [15], [23], [31], [39], [47], [55], [63], [71], [79], [87], [95], [103], [111], [119], [127], [135], [143], [151], [159], [167], [175], [183], [191], [199], [207], [215], [223], [231], [239], [247], [255], [263], [271], [279], [287], [295], [303], [311], [319], [327], [335], [339], [341], [947], [948], [952], [956], [962], [966], [973], [974], [975], [977] [2018-09-11 22:37:19,088 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2018-09-11 22:37:19,089 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-11 22:37:21,064 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-11 22:37:21,066 INFO L272 AbstractInterpreter]: Visited 54 different actions 54 times. Never merged. Never widened. Never found a fixpoint. Largest state had 23 variables. [2018-09-11 22:37:21,076 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-11 22:37:22,025 INFO L232 lantSequenceWeakener]: Weakened 53 states. On average, predicates are now at 80.58% of their original sizes. [2018-09-11 22:37:22,025 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-11 22:37:22,352 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-11 22:37:22,354 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-11 22:37:22,354 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-11 22:37:22,355 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-11 22:37:22,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-11 22:37:22,369 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-11 22:37:22,370 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-09-11 22:37:22,372 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 6 states. [2018-09-11 22:37:26,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-11 22:37:26,798 INFO L93 Difference]: Finished difference Result 693 states and 1229 transitions. [2018-09-11 22:37:26,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-11 22:37:26,801 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2018-09-11 22:37:26,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-11 22:37:26,819 INFO L225 Difference]: With dead ends: 693 [2018-09-11 22:37:26,820 INFO L226 Difference]: Without dead ends: 436 [2018-09-11 22:37:26,827 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-09-11 22:37:26,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2018-09-11 22:37:26,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 434. [2018-09-11 22:37:26,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-09-11 22:37:26,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 615 transitions. [2018-09-11 22:37:26,909 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 615 transitions. Word has length 55 [2018-09-11 22:37:26,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-11 22:37:26,910 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 615 transitions. [2018-09-11 22:37:26,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-11 22:37:26,910 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 615 transitions. [2018-09-11 22:37:26,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-11 22:37:26,917 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 22:37:26,918 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-11 22:37:26,918 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]=== [2018-09-11 22:37:26,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1023635005, now seen corresponding path program 1 times [2018-09-11 22:37:26,919 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 22:37:26,919 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 141 with the following transitions: [2018-09-11 22:37:26,920 INFO L202 CegarAbsIntRunner]: [0], [7], [15], [23], [31], [39], [47], [55], [63], [71], [79], [87], [95], [103], [111], [119], [127], [135], [143], [151], [159], [167], [175], [183], [191], [199], [207], [215], [223], [231], [239], [247], [255], [263], [271], [279], [287], [295], [303], [311], [319], [327], [335], [339], [341], [344], [352], [360], [368], [376], [384], [392], [400], [408], [416], [424], [432], [440], [448], [456], [464], [472], [480], [488], [493], [497], [501], [505], [509], [513], [517], [521], [525], [529], [533], [537], [541], [545], [549], [552], [946], [947], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-09-11 22:37:26,926 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2018-09-11 22:37:26,927 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-11 22:37:36,776 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-11 22:37:36,776 INFO L272 AbstractInterpreter]: Visited 92 different actions 177 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-09-11 22:37:36,815 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-11 22:37:39,132 INFO L232 lantSequenceWeakener]: Weakened 138 states. On average, predicates are now at 78.61% of their original sizes. [2018-09-11 22:37:39,132 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-11 22:37:42,753 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-11 22:37:42,754 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-11 22:37:42,754 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2018-09-11 22:37:42,754 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-11 22:37:42,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-11 22:37:42,757 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-11 22:37:42,757 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-09-11 22:37:42,757 INFO L87 Difference]: Start difference. First operand 434 states and 615 transitions. Second operand 14 states. [2018-09-11 22:37:58,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-11 22:37:58,562 INFO L93 Difference]: Finished difference Result 1340 states and 2335 transitions. [2018-09-11 22:37:58,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-11 22:37:58,563 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 140 [2018-09-11 22:37:58,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-11 22:37:58,571 INFO L225 Difference]: With dead ends: 1340 [2018-09-11 22:37:58,571 INFO L226 Difference]: Without dead ends: 1095 [2018-09-11 22:37:58,577 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 152 GetRequests, 99 SyntacticMatches, 28 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2018-09-11 22:37:58,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2018-09-11 22:37:58,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 850. [2018-09-11 22:37:58,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 850 states. [2018-09-11 22:37:58,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1058 transitions. [2018-09-11 22:37:58,632 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1058 transitions. Word has length 140 [2018-09-11 22:37:58,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-11 22:37:58,633 INFO L480 AbstractCegarLoop]: Abstraction has 850 states and 1058 transitions. [2018-09-11 22:37:58,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-11 22:37:58,633 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1058 transitions. [2018-09-11 22:37:58,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-11 22:37:58,639 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 22:37:58,639 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-11 22:37:58,640 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]=== [2018-09-11 22:37:58,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1301491881, now seen corresponding path program 1 times [2018-09-11 22:37:58,640 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 22:37:58,640 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 167 with the following transitions: [2018-09-11 22:37:58,641 INFO L202 CegarAbsIntRunner]: [0], [7], [15], [23], [31], [39], [47], [55], [63], [71], [79], [87], [95], [103], [111], [119], [127], [135], [143], [151], [159], [167], [175], [183], [191], [199], [207], [215], [223], [231], [239], [247], [255], [263], [271], [279], [287], [295], [303], [311], [319], [327], [335], [339], [341], [344], [352], [360], [368], [376], [384], [392], [400], [408], [416], [424], [432], [440], [448], [456], [464], [472], [480], [488], [493], [497], [501], [505], [509], [513], [517], [521], [525], [529], [533], [537], [541], [545], [549], [553], [557], [561], [565], [569], [573], [577], [581], [585], [589], [593], [597], [601], [605], [609], [613], [617], [621], [625], [629], [633], [637], [641], [645], [649], [653], [656], [946], [947], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-09-11 22:37:58,646 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2018-09-11 22:37:58,646 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-11 22:38:09,127 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-11 22:38:09,128 INFO L272 AbstractInterpreter]: Visited 118 different actions 230 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-09-11 22:38:09,139 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-11 22:38:10,757 INFO L232 lantSequenceWeakener]: Weakened 164 states. On average, predicates are now at 78.4% of their original sizes. [2018-09-11 22:38:10,758 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-11 22:38:11,739 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-11 22:38:11,740 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-11 22:38:11,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-09-11 22:38:11,740 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-11 22:38:11,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-11 22:38:11,741 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-11 22:38:11,742 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-09-11 22:38:11,742 INFO L87 Difference]: Start difference. First operand 850 states and 1058 transitions. Second operand 12 states. [2018-09-11 22:38:19,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-11 22:38:19,961 INFO L93 Difference]: Finished difference Result 1283 states and 1842 transitions. [2018-09-11 22:38:19,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-11 22:38:19,964 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 166 [2018-09-11 22:38:19,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-11 22:38:19,970 INFO L225 Difference]: With dead ends: 1283 [2018-09-11 22:38:19,970 INFO L226 Difference]: Without dead ends: 1038 [2018-09-11 22:38:19,972 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 174 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2018-09-11 22:38:19,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2018-09-11 22:38:20,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1035. [2018-09-11 22:38:20,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1035 states. [2018-09-11 22:38:20,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 1256 transitions. [2018-09-11 22:38:20,014 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 1256 transitions. Word has length 166 [2018-09-11 22:38:20,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-11 22:38:20,015 INFO L480 AbstractCegarLoop]: Abstraction has 1035 states and 1256 transitions. [2018-09-11 22:38:20,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-11 22:38:20,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 1256 transitions. [2018-09-11 22:38:20,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-09-11 22:38:20,021 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 22:38:20,022 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-11 22:38:20,022 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]=== [2018-09-11 22:38:20,022 INFO L82 PathProgramCache]: Analyzing trace with hash 952821987, now seen corresponding path program 1 times [2018-09-11 22:38:20,022 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 22:38:20,023 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 252 with the following transitions: [2018-09-11 22:38:20,023 INFO L202 CegarAbsIntRunner]: [0], [7], [15], [23], [31], [39], [47], [55], [63], [71], [79], [87], [95], [103], [111], [119], [127], [135], [143], [151], [159], [167], [175], [183], [191], [199], [207], [215], [223], [231], [239], [247], [255], [263], [271], [279], [287], [295], [303], [311], [319], [327], [335], [339], [341], [344], [352], [360], [368], [376], [384], [392], [400], [408], [416], [424], [432], [440], [448], [456], [464], [472], [480], [488], [493], [497], [501], [505], [509], [513], [517], [521], [525], [529], [533], [537], [541], [545], [549], [552], [553], [557], [561], [565], [569], [573], [577], [581], [585], [589], [593], [597], [601], [605], [609], [613], [617], [621], [625], [629], [633], [637], [641], [645], [649], [653], [656], [946], [947], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-09-11 22:38:20,027 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2018-09-11 22:38:20,028 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-11 22:38:45,649 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-11 22:38:45,650 INFO L272 AbstractInterpreter]: Visited 119 different actions 467 times. Merged at 7 different actions 24 times. Never widened. Found 5 fixpoints after 2 different actions. Largest state had 24 variables. [2018-09-11 22:38:45,658 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-11 22:38:48,433 INFO L232 lantSequenceWeakener]: Weakened 249 states. On average, predicates are now at 78.07% of their original sizes. [2018-09-11 22:38:48,433 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-11 22:38:53,994 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-11 22:38:53,994 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-11 22:38:53,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2018-09-11 22:38:53,995 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-11 22:38:53,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-11 22:38:53,996 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-11 22:38:53,997 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2018-09-11 22:38:53,997 INFO L87 Difference]: Start difference. First operand 1035 states and 1256 transitions. Second operand 16 states. [2018-09-11 22:39:15,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-11 22:39:15,170 INFO L93 Difference]: Finished difference Result 2597 states and 3738 transitions. [2018-09-11 22:39:15,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-11 22:39:15,181 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 251 [2018-09-11 22:39:15,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-11 22:39:15,193 INFO L225 Difference]: With dead ends: 2597 [2018-09-11 22:39:15,193 INFO L226 Difference]: Without dead ends: 1936 [2018-09-11 22:39:15,197 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 268 GetRequests, 174 SyntacticMatches, 62 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=255, Invalid=867, Unknown=0, NotChecked=0, Total=1122 [2018-09-11 22:39:15,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2018-09-11 22:39:15,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1469. [2018-09-11 22:39:15,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1469 states. [2018-09-11 22:39:15,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 1742 transitions. [2018-09-11 22:39:15,259 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 1742 transitions. Word has length 251 [2018-09-11 22:39:15,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-11 22:39:15,260 INFO L480 AbstractCegarLoop]: Abstraction has 1469 states and 1742 transitions. [2018-09-11 22:39:15,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-11 22:39:15,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 1742 transitions. [2018-09-11 22:39:15,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-09-11 22:39:15,267 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 22:39:15,267 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-11 22:39:15,268 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]=== [2018-09-11 22:39:15,268 INFO L82 PathProgramCache]: Analyzing trace with hash -233885150, now seen corresponding path program 1 times [2018-09-11 22:39:15,268 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 22:39:15,268 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 277 with the following transitions: [2018-09-11 22:39:15,269 INFO L202 CegarAbsIntRunner]: [0], [7], [15], [23], [31], [39], [47], [55], [63], [71], [79], [87], [95], [103], [111], [119], [127], [135], [143], [151], [159], [167], [175], [183], [191], [199], [207], [215], [223], [231], [239], [247], [255], [263], [271], [279], [287], [295], [303], [311], [319], [327], [335], [339], [341], [344], [352], [360], [368], [376], [384], [392], [400], [408], [416], [424], [432], [440], [448], [456], [464], [472], [480], [488], [493], [497], [501], [505], [509], [513], [517], [521], [525], [529], [533], [537], [541], [545], [549], [553], [557], [561], [565], [569], [573], [577], [581], [585], [589], [593], [597], [601], [605], [609], [613], [617], [621], [625], [629], [633], [637], [641], [645], [649], [652], [653], [656], [946], [947], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-09-11 22:39:15,281 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2018-09-11 22:39:15,281 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown