java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label35_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 14:01:56,233 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 14:01:56,236 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 14:01:56,256 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 14:01:56,256 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 14:01:56,257 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 14:01:56,259 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 14:01:56,261 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 14:01:56,264 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 14:01:56,265 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 14:01:56,266 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 14:01:56,268 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 14:01:56,269 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 14:01:56,270 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 14:01:56,271 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 14:01:56,274 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 14:01:56,275 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 14:01:56,277 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 14:01:56,280 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 14:01:56,287 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 14:01:56,289 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 14:01:56,290 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 14:01:56,298 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 14:01:56,298 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 14:01:56,298 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 14:01:56,299 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 14:01:56,300 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 14:01:56,303 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 14:01:56,304 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 14:01:56,305 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 14:01:56,305 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 14:01:56,309 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 14:01:56,309 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 14:01:56,309 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 14:01:56,310 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 14:01:56,311 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 14:01:56,312 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-07-24 14:01:56,343 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 14:01:56,343 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 14:01:56,344 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 14:01:56,344 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 14:01:56,344 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 14:01:56,347 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 14:01:56,348 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 14:01:56,348 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 14:01:56,348 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 14:01:56,348 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 14:01:56,348 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 14:01:56,350 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 14:01:56,350 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 14:01:56,351 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 14:01:56,351 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 14:01:56,351 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 14:01:56,351 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 14:01:56,351 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 14:01:56,352 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 14:01:56,352 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 14:01:56,352 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 14:01:56,353 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 14:01:56,354 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 14:01:56,354 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:01:56,354 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 14:01:56,354 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 14:01:56,355 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 14:01:56,355 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 14:01:56,355 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 14:01:56,355 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 14:01:56,355 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 14:01:56,356 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 14:01:56,356 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 14:01:56,426 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 14:01:56,441 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 14:01:56,448 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 14:01:56,450 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 14:01:56,450 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 14:01:56,451 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label35_true-unreach-call.c [2018-07-24 14:01:56,828 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b76fd4b2/907ff4b7ab57415db47fea9a53975ef1/FLAG8012f1ef9 [2018-07-24 14:01:57,115 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 14:01:57,116 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label35_true-unreach-call.c [2018-07-24 14:01:57,138 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b76fd4b2/907ff4b7ab57415db47fea9a53975ef1/FLAG8012f1ef9 [2018-07-24 14:01:57,158 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b76fd4b2/907ff4b7ab57415db47fea9a53975ef1 [2018-07-24 14:01:57,169 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 14:01:57,170 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 14:01:57,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 14:01:57,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 14:01:57,178 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 14:01:57,179 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:01:57" (1/1) ... [2018-07-24 14:01:57,182 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3440c597 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:01:57, skipping insertion in model container [2018-07-24 14:01:57,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:01:57" (1/1) ... [2018-07-24 14:01:57,388 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 14:01:57,812 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:01:57,835 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 14:01:58,050 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:01:58,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:01:58 WrapperNode [2018-07-24 14:01:58,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 14:01:58,153 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 14:01:58,153 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 14:01:58,153 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 14:01:58,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:01:58" (1/1) ... [2018-07-24 14:01:58,213 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:01:58" (1/1) ... [2018-07-24 14:01:58,328 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 14:01:58,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 14:01:58,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 14:01:58,329 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 14:01:58,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:01:58" (1/1) ... [2018-07-24 14:01:58,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:01:58" (1/1) ... [2018-07-24 14:01:58,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:01:58" (1/1) ... [2018-07-24 14:01:58,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:01:58" (1/1) ... [2018-07-24 14:01:58,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:01:58" (1/1) ... [2018-07-24 14:01:58,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:01:58" (1/1) ... [2018-07-24 14:01:58,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:01:58" (1/1) ... [2018-07-24 14:01:58,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 14:01:58,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 14:01:58,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 14:01:58,710 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 14:01:58,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:01:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:01:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 14:01:58,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 14:01:58,779 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 14:01:58,780 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 14:01:58,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 14:01:58,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 14:01:58,780 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 14:01:58,781 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 14:02:04,218 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 14:02:04,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:02:04 BoogieIcfgContainer [2018-07-24 14:02:04,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 14:02:04,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 14:02:04,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 14:02:04,224 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 14:02:04,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 02:01:57" (1/3) ... [2018-07-24 14:02:04,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@144e6fab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:02:04, skipping insertion in model container [2018-07-24 14:02:04,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:01:58" (2/3) ... [2018-07-24 14:02:04,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@144e6fab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:02:04, skipping insertion in model container [2018-07-24 14:02:04,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:02:04" (3/3) ... [2018-07-24 14:02:04,228 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label35_true-unreach-call.c [2018-07-24 14:02:04,238 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 14:02:04,247 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 14:02:04,301 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 14:02:04,303 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 14:02:04,303 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 14:02:04,303 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 14:02:04,303 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 14:02:04,303 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 14:02:04,304 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 14:02:04,304 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 14:02:04,304 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 14:02:04,332 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-07-24 14:02:04,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-07-24 14:02:04,343 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:02:04,345 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:02:04,345 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:02:04,350 INFO L82 PathProgramCache]: Analyzing trace with hash 460642553, now seen corresponding path program 1 times [2018-07-24 14:02:04,353 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:02:04,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:02:04,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:02:04,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:02:04,403 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:02:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:02:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:02:04,923 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:02:04,923 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:02:04,923 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:02:04,930 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:02:04,946 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:02:04,947 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:02:04,950 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 4 states. [2018-07-24 14:02:08,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:02:08,281 INFO L93 Difference]: Finished difference Result 982 states and 1758 transitions. [2018-07-24 14:02:08,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:02:08,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2018-07-24 14:02:08,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:02:08,309 INFO L225 Difference]: With dead ends: 982 [2018-07-24 14:02:08,309 INFO L226 Difference]: Without dead ends: 683 [2018-07-24 14:02:08,322 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:02:08,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2018-07-24 14:02:08,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 683. [2018-07-24 14:02:08,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2018-07-24 14:02:08,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1005 transitions. [2018-07-24 14:02:08,429 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1005 transitions. Word has length 65 [2018-07-24 14:02:08,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:02:08,430 INFO L471 AbstractCegarLoop]: Abstraction has 683 states and 1005 transitions. [2018-07-24 14:02:08,430 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:02:08,430 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1005 transitions. [2018-07-24 14:02:08,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-07-24 14:02:08,439 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:02:08,439 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:02:08,440 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:02:08,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1344478420, now seen corresponding path program 1 times [2018-07-24 14:02:08,440 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:02:08,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:02:08,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:02:08,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:02:08,442 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:02:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:02:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:02:08,705 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:02:08,705 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:02:08,706 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:02:08,708 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:02:08,708 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:02:08,708 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:02:08,709 INFO L87 Difference]: Start difference. First operand 683 states and 1005 transitions. Second operand 4 states. [2018-07-24 14:02:12,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:02:12,857 INFO L93 Difference]: Finished difference Result 2516 states and 3860 transitions. [2018-07-24 14:02:12,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:02:12,857 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2018-07-24 14:02:12,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:02:12,871 INFO L225 Difference]: With dead ends: 2516 [2018-07-24 14:02:12,872 INFO L226 Difference]: Without dead ends: 1839 [2018-07-24 14:02:12,878 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:02:12,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2018-07-24 14:02:12,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1821. [2018-07-24 14:02:12,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1821 states. [2018-07-24 14:02:12,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 2605 transitions. [2018-07-24 14:02:12,969 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 2605 transitions. Word has length 139 [2018-07-24 14:02:12,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:02:12,970 INFO L471 AbstractCegarLoop]: Abstraction has 1821 states and 2605 transitions. [2018-07-24 14:02:12,970 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:02:12,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 2605 transitions. [2018-07-24 14:02:12,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-07-24 14:02:12,978 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:02:12,979 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:02:12,979 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:02:12,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1598014071, now seen corresponding path program 1 times [2018-07-24 14:02:12,979 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:02:12,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:02:12,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:02:12,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:02:12,981 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:02:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:02:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:02:13,286 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:02:13,287 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:02:13,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:02:13,304 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:02:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:02:13,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:02:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:02:14,229 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:02:14,563 WARN L169 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-07-24 14:02:14,920 WARN L169 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-07-24 14:02:15,029 WARN L169 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2018-07-24 14:02:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:02:15,927 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 14:02:15,928 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2018-07-24 14:02:15,928 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:02:15,929 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:02:15,929 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:02:15,929 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:02:15,929 INFO L87 Difference]: Start difference. First operand 1821 states and 2605 transitions. Second operand 5 states. [2018-07-24 14:02:23,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:02:23,064 INFO L93 Difference]: Finished difference Result 5369 states and 7794 transitions. [2018-07-24 14:02:23,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 14:02:23,065 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2018-07-24 14:02:23,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:02:23,085 INFO L225 Difference]: With dead ends: 5369 [2018-07-24 14:02:23,086 INFO L226 Difference]: Without dead ends: 3359 [2018-07-24 14:02:23,096 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 317 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-07-24 14:02:23,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3359 states. [2018-07-24 14:02:23,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3359 to 3119. [2018-07-24 14:02:23,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3119 states. [2018-07-24 14:02:23,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3119 states to 3119 states and 4544 transitions. [2018-07-24 14:02:23,200 INFO L78 Accepts]: Start accepts. Automaton has 3119 states and 4544 transitions. Word has length 160 [2018-07-24 14:02:23,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:02:23,201 INFO L471 AbstractCegarLoop]: Abstraction has 3119 states and 4544 transitions. [2018-07-24 14:02:23,201 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:02:23,201 INFO L276 IsEmpty]: Start isEmpty. Operand 3119 states and 4544 transitions. [2018-07-24 14:02:23,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-07-24 14:02:23,210 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:02:23,210 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:02:23,210 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:02:23,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1190624837, now seen corresponding path program 1 times [2018-07-24 14:02:23,211 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:02:23,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:02:23,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:02:23,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:02:23,212 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:02:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:02:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 116 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:02:23,498 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:02:23,498 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:02:23,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:02:23,508 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:02:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:02:23,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:02:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-07-24 14:02:23,874 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:02:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 116 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:02:24,271 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:02:24,272 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 14:02:24,272 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:02:24,273 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:02:24,273 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:02:24,273 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:02:24,274 INFO L87 Difference]: Start difference. First operand 3119 states and 4544 transitions. Second operand 5 states. [2018-07-24 14:02:30,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:02:30,594 INFO L93 Difference]: Finished difference Result 7944 states and 11628 transitions. [2018-07-24 14:02:30,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:02:30,598 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 233 [2018-07-24 14:02:30,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:02:30,626 INFO L225 Difference]: With dead ends: 7944 [2018-07-24 14:02:30,626 INFO L226 Difference]: Without dead ends: 4831 [2018-07-24 14:02:30,644 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 461 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-07-24 14:02:30,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4831 states. [2018-07-24 14:02:30,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4831 to 4693. [2018-07-24 14:02:30,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4693 states. [2018-07-24 14:02:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4693 states to 4693 states and 6518 transitions. [2018-07-24 14:02:30,771 INFO L78 Accepts]: Start accepts. Automaton has 4693 states and 6518 transitions. Word has length 233 [2018-07-24 14:02:30,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:02:30,772 INFO L471 AbstractCegarLoop]: Abstraction has 4693 states and 6518 transitions. [2018-07-24 14:02:30,772 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:02:30,772 INFO L276 IsEmpty]: Start isEmpty. Operand 4693 states and 6518 transitions. [2018-07-24 14:02:30,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-07-24 14:02:30,787 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:02:30,788 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 14:02:30,788 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:02:30,788 INFO L82 PathProgramCache]: Analyzing trace with hash 2115642399, now seen corresponding path program 1 times [2018-07-24 14:02:30,789 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:02:30,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:02:30,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:02:30,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:02:30,790 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:02:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:02:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-07-24 14:02:31,307 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:02:31,308 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:02:31,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:02:31,318 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:02:31,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:02:31,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:02:31,771 WARN L169 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2018-07-24 14:02:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-07-24 14:02:31,882 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:02:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-07-24 14:02:32,525 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:02:32,526 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 11 [2018-07-24 14:02:32,526 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:02:32,526 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:02:32,526 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:02:32,527 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:02:32,527 INFO L87 Difference]: Start difference. First operand 4693 states and 6518 transitions. Second operand 6 states. [2018-07-24 14:02:37,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:02:37,863 INFO L93 Difference]: Finished difference Result 12143 states and 17781 transitions. [2018-07-24 14:02:37,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 14:02:37,863 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 277 [2018-07-24 14:02:37,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:02:37,905 INFO L225 Difference]: With dead ends: 12143 [2018-07-24 14:02:37,906 INFO L226 Difference]: Without dead ends: 7645 [2018-07-24 14:02:37,936 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 549 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:02:37,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7645 states. [2018-07-24 14:02:38,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7645 to 7146. [2018-07-24 14:02:38,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7146 states. [2018-07-24 14:02:38,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7146 states to 7146 states and 10091 transitions. [2018-07-24 14:02:38,117 INFO L78 Accepts]: Start accepts. Automaton has 7146 states and 10091 transitions. Word has length 277 [2018-07-24 14:02:38,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:02:38,118 INFO L471 AbstractCegarLoop]: Abstraction has 7146 states and 10091 transitions. [2018-07-24 14:02:38,118 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:02:38,118 INFO L276 IsEmpty]: Start isEmpty. Operand 7146 states and 10091 transitions. [2018-07-24 14:02:38,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-07-24 14:02:38,142 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:02:38,142 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:02:38,142 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:02:38,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1783736515, now seen corresponding path program 1 times [2018-07-24 14:02:38,143 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:02:38,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:02:38,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:02:38,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:02:38,144 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:02:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:02:38,793 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 215 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:02:38,794 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:02:38,794 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:02:38,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:02:38,813 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:02:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:02:38,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:02:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-07-24 14:02:39,059 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:02:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-07-24 14:02:39,193 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 14:02:39,194 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-07-24 14:02:39,194 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:02:39,194 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:02:39,195 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:02:39,195 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-07-24 14:02:39,202 INFO L87 Difference]: Start difference. First operand 7146 states and 10091 transitions. Second operand 3 states. [2018-07-24 14:02:40,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:02:40,887 INFO L93 Difference]: Finished difference Result 19155 states and 28625 transitions. [2018-07-24 14:02:40,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:02:40,889 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 300 [2018-07-24 14:02:40,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:02:40,964 INFO L225 Difference]: With dead ends: 19155 [2018-07-24 14:02:40,964 INFO L226 Difference]: Without dead ends: 12204 [2018-07-24 14:02:41,027 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 600 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-07-24 14:02:41,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12204 states. [2018-07-24 14:02:41,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12204 to 11854. [2018-07-24 14:02:41,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11854 states. [2018-07-24 14:02:41,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11854 states to 11854 states and 15992 transitions. [2018-07-24 14:02:41,341 INFO L78 Accepts]: Start accepts. Automaton has 11854 states and 15992 transitions. Word has length 300 [2018-07-24 14:02:41,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:02:41,342 INFO L471 AbstractCegarLoop]: Abstraction has 11854 states and 15992 transitions. [2018-07-24 14:02:41,342 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:02:41,342 INFO L276 IsEmpty]: Start isEmpty. Operand 11854 states and 15992 transitions. [2018-07-24 14:02:41,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-07-24 14:02:41,400 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:02:41,401 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:02:41,401 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:02:41,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1190197308, now seen corresponding path program 1 times [2018-07-24 14:02:41,402 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:02:41,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:02:41,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:02:41,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:02:41,403 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:02:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:02:42,112 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 244 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:02:42,112 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:02:42,112 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:02:42,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:02:42,124 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:02:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:02:42,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:02:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-07-24 14:02:42,553 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:02:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-07-24 14:02:43,343 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 14:02:43,343 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 9 [2018-07-24 14:02:43,343 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:02:43,344 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:02:43,344 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:02:43,344 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:02:43,345 INFO L87 Difference]: Start difference. First operand 11854 states and 15992 transitions. Second operand 3 states. [2018-07-24 14:02:44,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:02:44,598 INFO L93 Difference]: Finished difference Result 23509 states and 31814 transitions. [2018-07-24 14:02:44,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:02:44,599 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 350 [2018-07-24 14:02:44,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:02:44,648 INFO L225 Difference]: With dead ends: 23509 [2018-07-24 14:02:44,649 INFO L226 Difference]: Without dead ends: 11850 [2018-07-24 14:02:44,683 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 697 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:02:44,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11850 states. [2018-07-24 14:02:44,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11850 to 11850. [2018-07-24 14:02:44,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11850 states. [2018-07-24 14:02:44,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11850 states to 11850 states and 15979 transitions. [2018-07-24 14:02:44,940 INFO L78 Accepts]: Start accepts. Automaton has 11850 states and 15979 transitions. Word has length 350 [2018-07-24 14:02:44,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:02:44,941 INFO L471 AbstractCegarLoop]: Abstraction has 11850 states and 15979 transitions. [2018-07-24 14:02:44,941 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:02:44,941 INFO L276 IsEmpty]: Start isEmpty. Operand 11850 states and 15979 transitions. [2018-07-24 14:02:45,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-07-24 14:02:45,012 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:02:45,012 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2018-07-24 14:02:45,013 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:02:45,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1869923994, now seen corresponding path program 1 times [2018-07-24 14:02:45,013 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:02:45,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:02:45,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:02:45,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:02:45,014 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:02:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:02:45,571 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-07-24 14:02:45,572 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:02:45,572 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:02:45,572 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:02:45,572 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:02:45,573 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:02:45,573 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:02:45,573 INFO L87 Difference]: Start difference. First operand 11850 states and 15979 transitions. Second operand 4 states. [2018-07-24 14:02:49,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:02:49,615 INFO L93 Difference]: Finished difference Result 32708 states and 47676 transitions. [2018-07-24 14:02:49,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:02:49,615 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 373 [2018-07-24 14:02:49,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:02:49,711 INFO L225 Difference]: With dead ends: 32708 [2018-07-24 14:02:49,712 INFO L226 Difference]: Without dead ends: 21053 [2018-07-24 14:02:49,778 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:02:49,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21053 states. [2018-07-24 14:02:50,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21053 to 21023. [2018-07-24 14:02:50,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21023 states. [2018-07-24 14:02:50,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21023 states to 21023 states and 29529 transitions. [2018-07-24 14:02:50,429 INFO L78 Accepts]: Start accepts. Automaton has 21023 states and 29529 transitions. Word has length 373 [2018-07-24 14:02:50,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:02:50,430 INFO L471 AbstractCegarLoop]: Abstraction has 21023 states and 29529 transitions. [2018-07-24 14:02:50,430 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:02:50,431 INFO L276 IsEmpty]: Start isEmpty. Operand 21023 states and 29529 transitions. [2018-07-24 14:02:50,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2018-07-24 14:02:50,524 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:02:50,524 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:02:50,525 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:02:50,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1404058095, now seen corresponding path program 1 times [2018-07-24 14:02:50,525 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:02:50,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:02:50,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:02:50,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:02:50,526 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:02:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:02:51,175 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 278 proven. 94 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-07-24 14:02:51,175 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:02:51,175 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:02:51,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:02:51,187 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:02:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:02:51,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:02:52,158 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 310 proven. 2 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-07-24 14:02:52,158 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:02:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 184 proven. 276 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:02:52,541 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:02:52,541 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:02:52,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:02:52,558 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:02:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:02:52,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:02:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 404 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-07-24 14:02:52,985 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:02:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 278 proven. 94 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-07-24 14:02:53,597 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:02:53,598 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8, 5, 5] total 17 [2018-07-24 14:02:53,598 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:02:53,599 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-24 14:02:53,599 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-24 14:02:53,599 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-07-24 14:02:53,600 INFO L87 Difference]: Start difference. First operand 21023 states and 29529 transitions. Second operand 11 states. [2018-07-24 14:02:54,795 WARN L169 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 14:03:13,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:03:13,291 INFO L93 Difference]: Finished difference Result 82119 states and 179716 transitions. [2018-07-24 14:03:13,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-07-24 14:03:13,292 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 395 [2018-07-24 14:03:13,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:03:14,058 INFO L225 Difference]: With dead ends: 82119 [2018-07-24 14:03:14,059 INFO L226 Difference]: Without dead ends: 61291 [2018-07-24 14:03:14,442 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1732 GetRequests, 1638 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2747 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1551, Invalid=6639, Unknown=0, NotChecked=0, Total=8190 [2018-07-24 14:03:14,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61291 states. [2018-07-24 14:03:17,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61291 to 59313. [2018-07-24 14:03:17,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59313 states. [2018-07-24 14:03:17,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59313 states to 59313 states and 105490 transitions. [2018-07-24 14:03:17,651 INFO L78 Accepts]: Start accepts. Automaton has 59313 states and 105490 transitions. Word has length 395 [2018-07-24 14:03:17,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:03:17,652 INFO L471 AbstractCegarLoop]: Abstraction has 59313 states and 105490 transitions. [2018-07-24 14:03:17,652 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-24 14:03:17,652 INFO L276 IsEmpty]: Start isEmpty. Operand 59313 states and 105490 transitions. [2018-07-24 14:03:17,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2018-07-24 14:03:17,947 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:03:17,947 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:03:17,948 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:03:17,948 INFO L82 PathProgramCache]: Analyzing trace with hash -801496546, now seen corresponding path program 1 times [2018-07-24 14:03:17,948 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:03:17,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:03:17,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:03:17,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:03:17,949 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:03:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:03:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 418 proven. 94 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2018-07-24 14:03:18,618 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:03:18,618 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:03:18,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:03:18,628 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:03:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:03:18,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:03:19,453 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 613 proven. 2 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2018-07-24 14:03:19,453 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:03:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 418 proven. 94 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2018-07-24 14:03:19,754 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:03:19,755 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:03:19,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:03:19,770 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:03:20,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:03:20,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:03:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 511 proven. 175 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-07-24 14:03:20,576 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:03:20,786 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 418 proven. 94 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2018-07-24 14:03:20,788 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:03:20,789 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 6, 5] total 9 [2018-07-24 14:03:20,789 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:03:20,790 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 14:03:20,790 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 14:03:20,790 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:03:20,791 INFO L87 Difference]: Start difference. First operand 59313 states and 105490 transitions. Second operand 7 states. [2018-07-24 14:03:26,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:03:26,779 INFO L93 Difference]: Finished difference Result 121828 states and 240591 transitions. [2018-07-24 14:03:26,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:03:26,780 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 454 [2018-07-24 14:03:26,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:03:27,333 INFO L225 Difference]: With dead ends: 121828 [2018-07-24 14:03:27,333 INFO L226 Difference]: Without dead ends: 62024 [2018-07-24 14:03:27,717 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1824 GetRequests, 1810 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:03:27,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62024 states. [2018-07-24 14:03:29,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62024 to 60159. [2018-07-24 14:03:29,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60159 states. [2018-07-24 14:03:29,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60159 states to 60159 states and 95604 transitions. [2018-07-24 14:03:29,701 INFO L78 Accepts]: Start accepts. Automaton has 60159 states and 95604 transitions. Word has length 454 [2018-07-24 14:03:29,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:03:29,702 INFO L471 AbstractCegarLoop]: Abstraction has 60159 states and 95604 transitions. [2018-07-24 14:03:29,702 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 14:03:29,702 INFO L276 IsEmpty]: Start isEmpty. Operand 60159 states and 95604 transitions. [2018-07-24 14:03:30,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2018-07-24 14:03:30,156 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:03:30,157 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:03:30,157 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:03:30,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1704633207, now seen corresponding path program 1 times [2018-07-24 14:03:30,158 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:03:30,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:03:30,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:03:30,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:03:30,159 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:03:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:03:31,159 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 332 proven. 330 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2018-07-24 14:03:31,160 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:03:31,160 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:03:31,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:03:31,168 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:03:31,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:03:31,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:03:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 634 proven. 2 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2018-07-24 14:03:31,639 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:03:31,956 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 423 proven. 89 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2018-07-24 14:03:31,977 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:03:31,977 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:03:31,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:03:31,992 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:03:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:03:32,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:03:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 634 proven. 2 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2018-07-24 14:03:32,642 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:03:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 423 proven. 89 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2018-07-24 14:03:32,903 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:03:32,904 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 5, 5] total 14 [2018-07-24 14:03:32,904 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:03:32,905 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-24 14:03:32,905 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-24 14:03:32,906 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-07-24 14:03:32,907 INFO L87 Difference]: Start difference. First operand 60159 states and 95604 transitions. Second operand 10 states. [2018-07-24 14:03:38,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:03:38,306 INFO L93 Difference]: Finished difference Result 126966 states and 206093 transitions. [2018-07-24 14:03:38,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-24 14:03:38,306 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 575 [2018-07-24 14:03:38,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:03:38,705 INFO L225 Difference]: With dead ends: 126966 [2018-07-24 14:03:38,705 INFO L226 Difference]: Without dead ends: 70056 [2018-07-24 14:03:39,036 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2320 GetRequests, 2295 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2018-07-24 14:03:39,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70056 states. [2018-07-24 14:03:41,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70056 to 69833. [2018-07-24 14:03:41,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69833 states. [2018-07-24 14:03:41,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69833 states to 69833 states and 110020 transitions. [2018-07-24 14:03:41,576 INFO L78 Accepts]: Start accepts. Automaton has 69833 states and 110020 transitions. Word has length 575 [2018-07-24 14:03:41,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:03:41,577 INFO L471 AbstractCegarLoop]: Abstraction has 69833 states and 110020 transitions. [2018-07-24 14:03:41,577 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-24 14:03:41,577 INFO L276 IsEmpty]: Start isEmpty. Operand 69833 states and 110020 transitions. [2018-07-24 14:03:42,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2018-07-24 14:03:42,132 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:03:42,133 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:03:42,133 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:03:42,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1358679287, now seen corresponding path program 1 times [2018-07-24 14:03:42,134 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:03:42,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:03:42,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:03:42,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:03:42,135 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:03:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:03:42,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 598 proven. 94 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2018-07-24 14:03:42,797 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:03:42,797 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:03:42,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:03:42,811 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:03:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:03:43,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:03:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 896 proven. 2 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2018-07-24 14:03:43,236 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:03:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 598 proven. 94 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2018-07-24 14:03:44,140 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:03:44,141 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:03:44,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:03:44,159 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:03:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:03:44,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:03:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 896 proven. 2 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2018-07-24 14:03:45,081 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:03:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 598 proven. 94 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2018-07-24 14:03:45,360 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:03:45,361 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 14:03:45,361 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:03:45,362 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:03:45,362 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:03:45,362 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:03:45,363 INFO L87 Difference]: Start difference. First operand 69833 states and 110020 transitions. Second operand 9 states. [2018-07-24 14:03:51,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:03:51,311 INFO L93 Difference]: Finished difference Result 135949 states and 223187 transitions. [2018-07-24 14:03:51,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-24 14:03:51,312 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 614 [2018-07-24 14:03:51,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:03:51,574 INFO L225 Difference]: With dead ends: 135949 [2018-07-24 14:03:51,575 INFO L226 Difference]: Without dead ends: 65089 [2018-07-24 14:03:51,875 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2474 GetRequests, 2452 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2018-07-24 14:03:51,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65089 states. [2018-07-24 14:03:53,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65089 to 61815. [2018-07-24 14:03:53,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61815 states. [2018-07-24 14:03:53,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61815 states to 61815 states and 87492 transitions. [2018-07-24 14:03:53,543 INFO L78 Accepts]: Start accepts. Automaton has 61815 states and 87492 transitions. Word has length 614 [2018-07-24 14:03:53,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:03:53,544 INFO L471 AbstractCegarLoop]: Abstraction has 61815 states and 87492 transitions. [2018-07-24 14:03:53,544 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:03:53,544 INFO L276 IsEmpty]: Start isEmpty. Operand 61815 states and 87492 transitions. [2018-07-24 14:03:53,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2018-07-24 14:03:53,820 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:03:53,821 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:03:53,821 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:03:53,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1171554788, now seen corresponding path program 1 times [2018-07-24 14:03:53,821 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:03:53,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:03:53,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:03:53,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:03:53,822 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:03:53,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:03:54,675 WARN L169 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 8 [2018-07-24 14:03:54,875 WARN L169 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 14:03:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 844 proven. 111 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2018-07-24 14:03:56,099 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:03:56,099 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:03:56,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:03:56,107 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:03:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:03:56,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:03:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 669 proven. 2 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2018-07-24 14:03:57,238 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:03:58,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 669 proven. 2 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2018-07-24 14:03:58,323 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:03:58,323 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:03:58,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:03:58,339 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:03:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:03:58,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:03:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 1057 proven. 12 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2018-07-24 14:03:59,657 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:03:59,871 WARN L169 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-07-24 14:04:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 669 proven. 2 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2018-07-24 14:04:00,614 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:04:00,614 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6, 6, 9, 5] total 31 [2018-07-24 14:04:00,615 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:04:00,616 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-24 14:04:00,616 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-24 14:04:00,617 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2018-07-24 14:04:00,617 INFO L87 Difference]: Start difference. First operand 61815 states and 87492 transitions. Second operand 20 states. [2018-07-24 14:04:06,861 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2018-07-24 14:04:11,196 WARN L169 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2018-07-24 14:04:13,837 WARN L169 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2018-07-24 14:04:21,210 WARN L169 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 29 [2018-07-24 14:04:25,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:04:25,545 INFO L93 Difference]: Finished difference Result 139539 states and 202343 transitions. [2018-07-24 14:04:25,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-07-24 14:04:25,546 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 615 [2018-07-24 14:04:25,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:04:25,883 INFO L225 Difference]: With dead ends: 139539 [2018-07-24 14:04:25,883 INFO L226 Difference]: Without dead ends: 69377 [2018-07-24 14:04:26,155 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2596 GetRequests, 2496 SyntacticMatches, 6 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2628 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1498, Invalid=7622, Unknown=0, NotChecked=0, Total=9120 [2018-07-24 14:04:26,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69377 states. [2018-07-24 14:04:27,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69377 to 62126. [2018-07-24 14:04:27,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62126 states. [2018-07-24 14:04:27,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62126 states to 62126 states and 80661 transitions. [2018-07-24 14:04:27,901 INFO L78 Accepts]: Start accepts. Automaton has 62126 states and 80661 transitions. Word has length 615 [2018-07-24 14:04:27,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:04:27,902 INFO L471 AbstractCegarLoop]: Abstraction has 62126 states and 80661 transitions. [2018-07-24 14:04:27,902 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-24 14:04:27,902 INFO L276 IsEmpty]: Start isEmpty. Operand 62126 states and 80661 transitions. [2018-07-24 14:04:28,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 649 [2018-07-24 14:04:28,108 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:04:28,108 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 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] [2018-07-24 14:04:28,109 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:04:28,109 INFO L82 PathProgramCache]: Analyzing trace with hash 826406864, now seen corresponding path program 1 times [2018-07-24 14:04:28,109 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:04:28,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:04:28,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:04:28,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:04:28,110 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:04:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:04:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 597 proven. 94 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2018-07-24 14:04:29,287 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:04:29,287 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:04:29,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:04:29,296 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:04:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:04:29,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:04:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 903 proven. 2 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2018-07-24 14:04:29,891 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:04:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 597 proven. 94 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2018-07-24 14:04:30,187 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:04:30,188 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:04:30,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:04:30,207 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:04:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:04:30,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:04:30,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 903 proven. 2 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2018-07-24 14:04:30,976 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:04:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 597 proven. 94 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2018-07-24 14:04:33,706 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:04:33,707 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 7 [2018-07-24 14:04:33,707 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:04:33,708 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:04:33,708 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:04:33,708 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-07-24 14:04:33,708 INFO L87 Difference]: Start difference. First operand 62126 states and 80661 transitions. Second operand 6 states. [2018-07-24 14:04:37,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:04:37,731 INFO L93 Difference]: Finished difference Result 129357 states and 173486 transitions. [2018-07-24 14:04:37,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-24 14:04:37,732 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 648 [2018-07-24 14:04:37,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:04:38,033 INFO L225 Difference]: With dead ends: 129357 [2018-07-24 14:04:38,033 INFO L226 Difference]: Without dead ends: 70065 [2018-07-24 14:04:38,273 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2605 GetRequests, 2591 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:04:38,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70065 states. [2018-07-24 14:04:39,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70065 to 68076. [2018-07-24 14:04:39,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68076 states. [2018-07-24 14:04:40,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68076 states to 68076 states and 88747 transitions. [2018-07-24 14:04:40,091 INFO L78 Accepts]: Start accepts. Automaton has 68076 states and 88747 transitions. Word has length 648 [2018-07-24 14:04:40,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:04:40,092 INFO L471 AbstractCegarLoop]: Abstraction has 68076 states and 88747 transitions. [2018-07-24 14:04:40,092 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:04:40,092 INFO L276 IsEmpty]: Start isEmpty. Operand 68076 states and 88747 transitions. [2018-07-24 14:04:40,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2018-07-24 14:04:40,306 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:04:40,307 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 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, 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] [2018-07-24 14:04:40,307 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:04:40,307 INFO L82 PathProgramCache]: Analyzing trace with hash -331294242, now seen corresponding path program 1 times [2018-07-24 14:04:40,307 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:04:40,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:04:40,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:04:40,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:04:40,308 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:04:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:04:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 699 proven. 94 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2018-07-24 14:04:40,986 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:04:40,986 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:04:40,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:04:40,994 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:04:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:04:41,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:04:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 1005 proven. 2 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2018-07-24 14:04:41,449 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:04:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 699 proven. 94 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2018-07-24 14:04:41,995 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:04:41,995 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:04:42,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:04:42,012 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:04:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:04:42,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:04:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 1005 proven. 2 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2018-07-24 14:04:42,763 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:04:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 699 proven. 94 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2018-07-24 14:04:43,077 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:04:43,077 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 7 [2018-07-24 14:04:43,077 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:04:43,078 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:04:43,078 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:04:43,079 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-07-24 14:04:43,079 INFO L87 Difference]: Start difference. First operand 68076 states and 88747 transitions. Second operand 6 states. [2018-07-24 14:04:47,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:04:47,128 INFO L93 Difference]: Finished difference Result 130177 states and 172902 transitions. [2018-07-24 14:04:47,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-24 14:04:47,129 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 700 [2018-07-24 14:04:47,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:04:47,391 INFO L225 Difference]: With dead ends: 130177 [2018-07-24 14:04:47,392 INFO L226 Difference]: Without dead ends: 62485 [2018-07-24 14:04:47,653 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2813 GetRequests, 2797 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:04:47,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62485 states. [2018-07-24 14:04:48,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62485 to 62063. [2018-07-24 14:04:48,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62063 states. [2018-07-24 14:04:48,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62063 states to 62063 states and 78579 transitions. [2018-07-24 14:04:48,712 INFO L78 Accepts]: Start accepts. Automaton has 62063 states and 78579 transitions. Word has length 700 [2018-07-24 14:04:48,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:04:48,713 INFO L471 AbstractCegarLoop]: Abstraction has 62063 states and 78579 transitions. [2018-07-24 14:04:48,713 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:04:48,713 INFO L276 IsEmpty]: Start isEmpty. Operand 62063 states and 78579 transitions. [2018-07-24 14:04:48,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 766 [2018-07-24 14:04:48,923 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:04:48,924 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 3, 3, 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] [2018-07-24 14:04:48,924 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:04:48,924 INFO L82 PathProgramCache]: Analyzing trace with hash -198051570, now seen corresponding path program 1 times [2018-07-24 14:04:48,924 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:04:48,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:04:48,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:04:48,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:04:48,925 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:04:49,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:04:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1917 backedges. 621 proven. 719 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2018-07-24 14:04:50,477 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:04:50,477 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:04:50,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:04:50,485 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:04:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:04:50,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:04:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1917 backedges. 1336 proven. 2 refuted. 0 times theorem prover too weak. 579 trivial. 0 not checked. [2018-07-24 14:04:51,095 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:04:51,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1917 backedges. 652 proven. 176 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-07-24 14:04:51,541 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:04:51,541 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:04:51,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:04:51,556 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:04:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:04:52,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:04:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1917 backedges. 1336 proven. 2 refuted. 0 times theorem prover too weak. 579 trivial. 0 not checked. [2018-07-24 14:04:52,572 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:04:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1917 backedges. 652 proven. 176 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-07-24 14:04:53,024 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:04:53,024 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 5, 5] total 22 [2018-07-24 14:04:53,024 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:04:53,025 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-24 14:04:53,026 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-24 14:04:53,026 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2018-07-24 14:04:53,026 INFO L87 Difference]: Start difference. First operand 62063 states and 78579 transitions. Second operand 17 states. [2018-07-24 14:04:55,707 WARN L169 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-07-24 14:05:03,644 WARN L169 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 12 [2018-07-24 14:05:11,253 WARN L169 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 22 [2018-07-24 14:05:15,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:05:15,722 INFO L93 Difference]: Finished difference Result 137521 states and 188911 transitions. [2018-07-24 14:05:15,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-07-24 14:05:15,722 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 765 [2018-07-24 14:05:15,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:05:16,001 INFO L225 Difference]: With dead ends: 137521 [2018-07-24 14:05:16,001 INFO L226 Difference]: Without dead ends: 75649 [2018-07-24 14:05:16,194 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3224 GetRequests, 3118 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3769 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1956, Invalid=8964, Unknown=0, NotChecked=0, Total=10920 [2018-07-24 14:05:16,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75649 states. [2018-07-24 14:05:17,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75649 to 72945. [2018-07-24 14:05:17,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72945 states. [2018-07-24 14:05:17,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72945 states to 72945 states and 87534 transitions. [2018-07-24 14:05:17,545 INFO L78 Accepts]: Start accepts. Automaton has 72945 states and 87534 transitions. Word has length 765 [2018-07-24 14:05:17,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:05:17,545 INFO L471 AbstractCegarLoop]: Abstraction has 72945 states and 87534 transitions. [2018-07-24 14:05:17,545 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-24 14:05:17,545 INFO L276 IsEmpty]: Start isEmpty. Operand 72945 states and 87534 transitions. [2018-07-24 14:05:17,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 877 [2018-07-24 14:05:17,750 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:05:17,751 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 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, 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] [2018-07-24 14:05:17,751 INFO L414 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:05:17,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1594463049, now seen corresponding path program 1 times [2018-07-24 14:05:17,751 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:05:17,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:05:17,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:05:17,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:05:17,753 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:05:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:05:19,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2536 backedges. 452 proven. 8 refuted. 0 times theorem prover too weak. 2076 trivial. 0 not checked. [2018-07-24 14:05:19,129 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:05:19,129 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:05:19,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:05:19,145 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:05:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:05:19,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:05:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2536 backedges. 1401 proven. 0 refuted. 0 times theorem prover too weak. 1135 trivial. 0 not checked. [2018-07-24 14:05:19,898 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:05:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2536 backedges. 452 proven. 8 refuted. 0 times theorem prover too weak. 2076 trivial. 0 not checked. [2018-07-24 14:05:20,495 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:05:20,496 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 3 [2018-07-24 14:05:20,496 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:05:20,496 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:05:20,497 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:05:20,497 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 14:05:20,497 INFO L87 Difference]: Start difference. First operand 72945 states and 87534 transitions. Second operand 3 states. [2018-07-24 14:05:22,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:05:22,760 INFO L93 Difference]: Finished difference Result 128592 states and 155091 transitions. [2018-07-24 14:05:22,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:05:22,760 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 876 [2018-07-24 14:05:22,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:05:22,951 INFO L225 Difference]: With dead ends: 128592 [2018-07-24 14:05:22,951 INFO L226 Difference]: Without dead ends: 59202 [2018-07-24 14:05:23,123 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1754 GetRequests, 1753 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 14:05:23,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59202 states. [2018-07-24 14:05:24,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59202 to 59197. [2018-07-24 14:05:24,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59197 states. [2018-07-24 14:05:24,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59197 states to 59197 states and 70691 transitions. [2018-07-24 14:05:24,178 INFO L78 Accepts]: Start accepts. Automaton has 59197 states and 70691 transitions. Word has length 876 [2018-07-24 14:05:24,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:05:24,178 INFO L471 AbstractCegarLoop]: Abstraction has 59197 states and 70691 transitions. [2018-07-24 14:05:24,178 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:05:24,178 INFO L276 IsEmpty]: Start isEmpty. Operand 59197 states and 70691 transitions. [2018-07-24 14:05:24,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 980 [2018-07-24 14:05:24,362 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:05:24,362 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:05:24,363 INFO L414 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:05:24,363 INFO L82 PathProgramCache]: Analyzing trace with hash -407299891, now seen corresponding path program 1 times [2018-07-24 14:05:24,363 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:05:24,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:05:24,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:05:24,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:05:24,364 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:05:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:05:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3275 backedges. 1769 proven. 548 refuted. 0 times theorem prover too weak. 958 trivial. 0 not checked. [2018-07-24 14:05:27,023 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:05:27,024 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:05:27,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:05:27,031 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:05:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:05:27,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:05:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3275 backedges. 2052 proven. 2 refuted. 0 times theorem prover too weak. 1221 trivial. 0 not checked. [2018-07-24 14:05:27,984 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:05:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3275 backedges. 991 proven. 186 refuted. 0 times theorem prover too weak. 2098 trivial. 0 not checked. [2018-07-24 14:05:28,964 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:05:28,964 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:05:28,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:05:28,982 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:05:29,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:05:29,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:05:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3275 backedges. 2052 proven. 2 refuted. 0 times theorem prover too weak. 1221 trivial. 0 not checked. [2018-07-24 14:05:30,613 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:05:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3275 backedges. 991 proven. 186 refuted. 0 times theorem prover too weak. 2098 trivial. 0 not checked. [2018-07-24 14:05:32,094 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:05:32,095 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 5, 5, 5, 5] total 32 [2018-07-24 14:05:32,095 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:05:32,098 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-24 14:05:32,099 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-24 14:05:32,099 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2018-07-24 14:05:32,100 INFO L87 Difference]: Start difference. First operand 59197 states and 70691 transitions. Second operand 25 states. Received shutdown request... [2018-07-24 14:05:38,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-24 14:05:38,539 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 14:05:38,546 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 14:05:38,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 02:05:38 BoogieIcfgContainer [2018-07-24 14:05:38,546 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 14:05:38,549 INFO L168 Benchmark]: Toolchain (without parser) took 221378.10 ms. Allocated memory was 1.5 GB in the beginning and 4.8 GB in the end (delta: 3.3 GB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -554.9 MB). Peak memory consumption was 2.8 GB. Max. memory is 7.1 GB. [2018-07-24 14:05:38,550 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 14:05:38,550 INFO L168 Benchmark]: CACSL2BoogieTranslator took 980.90 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-07-24 14:05:38,554 INFO L168 Benchmark]: Boogie Procedure Inliner took 175.27 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-07-24 14:05:38,555 INFO L168 Benchmark]: Boogie Preprocessor took 380.25 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 818.9 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -943.5 MB). Peak memory consumption was 49.6 MB. Max. memory is 7.1 GB. [2018-07-24 14:05:38,556 INFO L168 Benchmark]: RCFGBuilder took 5510.58 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 195.7 MB). Peak memory consumption was 195.7 MB. Max. memory is 7.1 GB. [2018-07-24 14:05:38,557 INFO L168 Benchmark]: TraceAbstraction took 214326.14 ms. Allocated memory was 2.4 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 2.1 GB in the beginning and 2.0 GB in the end (delta: 97.8 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-07-24 14:05:38,565 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 980.90 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 175.27 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 380.25 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 818.9 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -943.5 MB). Peak memory consumption was 49.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5510.58 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 195.7 MB). Peak memory consumption was 195.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 214326.14 ms. Allocated memory was 2.4 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 2.1 GB in the beginning and 2.0 GB in the end (delta: 97.8 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 180]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 180). Cancelled while BasicCegarLoop was constructing difference of abstraction (59197states) and interpolant automaton (currently 36 states, 25 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 66 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 214.2s OverallTime, 18 OverallIterations, 9 TraceHistogramMax, 141.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3412 SDtfs, 30059 SDslu, 5607 SDs, 0 SdLazy, 63674 SolverSat, 10888 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 89.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28029 GetRequests, 27509 SyntacticMatches, 55 SemanticMatches, 464 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10431 ImplicationChecksByTransitivity, 26.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72945occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 18.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 20986 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.9s SsaConstructionTime, 7.7s SatisfiabilityAnalysisTime, 35.5s InterpolantComputationTime, 22204 NumberOfCodeBlocks, 22204 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 35824 ConstructedInterpolants, 8 QuantifiedInterpolants, 59145165 SizeOfPredicates, 30 NumberOfNonLiveVariables, 21050 ConjunctsInSsa, 177 ConjunctsInUnsatCore, 66 InterpolantComputations, 12 PerfectInterpolantSequences, 68338/73215 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/Problem11_label35_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_14-05-38-595.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem11_label35_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_14-05-38-595.csv Completed graceful shutdown