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/Problem17_label59_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 14:56:49,333 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 14:56:49,335 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 14:56:49,348 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 14:56:49,348 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 14:56:49,349 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 14:56:49,350 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 14:56:49,352 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 14:56:49,354 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 14:56:49,355 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 14:56:49,355 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 14:56:49,356 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 14:56:49,357 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 14:56:49,357 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 14:56:49,359 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 14:56:49,359 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 14:56:49,360 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 14:56:49,362 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 14:56:49,364 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 14:56:49,369 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 14:56:49,370 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 14:56:49,374 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 14:56:49,377 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 14:56:49,378 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 14:56:49,378 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 14:56:49,379 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 14:56:49,381 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 14:56:49,382 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 14:56:49,384 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 14:56:49,385 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 14:56:49,389 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 14:56:49,390 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 14:56:49,390 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 14:56:49,391 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 14:56:49,392 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 14:56:49,392 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 14:56:49,395 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 14:56:49,425 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 14:56:49,426 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 14:56:49,427 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 14:56:49,427 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 14:56:49,427 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 14:56:49,427 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 14:56:49,428 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 14:56:49,428 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 14:56:49,428 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 14:56:49,428 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 14:56:49,428 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 14:56:49,429 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 14:56:49,429 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 14:56:49,429 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 14:56:49,429 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 14:56:49,430 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 14:56:49,430 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 14:56:49,430 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 14:56:49,430 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 14:56:49,430 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 14:56:49,431 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 14:56:49,431 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 14:56:49,431 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 14:56:49,431 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:56:49,431 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 14:56:49,432 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 14:56:49,432 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 14:56:49,432 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 14:56:49,432 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 14:56:49,432 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 14:56:49,432 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 14:56:49,433 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 14:56:49,433 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 14:56:49,484 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 14:56:49,497 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 14:56:49,501 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 14:56:49,503 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 14:56:49,504 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 14:56:49,504 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label59_true-unreach-call.c [2018-07-24 14:56:49,855 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/721035537/501eaf89d8924c2eac6ef2407023b5b3/FLAG1a1b883c3 [2018-07-24 14:56:50,293 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 14:56:50,294 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label59_true-unreach-call.c [2018-07-24 14:56:50,325 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/721035537/501eaf89d8924c2eac6ef2407023b5b3/FLAG1a1b883c3 [2018-07-24 14:56:50,347 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/721035537/501eaf89d8924c2eac6ef2407023b5b3 [2018-07-24 14:56:50,359 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 14:56:50,362 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 14:56:50,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 14:56:50,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 14:56:50,372 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 14:56:50,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:56:50" (1/1) ... [2018-07-24 14:56:50,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66a5721 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:56:50, skipping insertion in model container [2018-07-24 14:56:50,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:56:50" (1/1) ... [2018-07-24 14:56:50,702 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 14:56:51,436 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:56:51,454 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 14:56:52,026 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:56:52,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:56:52 WrapperNode [2018-07-24 14:56:52,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 14:56:52,239 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 14:56:52,239 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 14:56:52,239 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 14:56:52,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:56:52" (1/1) ... [2018-07-24 14:56:52,326 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:56:52" (1/1) ... [2018-07-24 14:56:52,523 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 14:56:52,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 14:56:52,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 14:56:52,524 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 14:56:53,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:56:52" (1/1) ... [2018-07-24 14:56:53,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:56:52" (1/1) ... [2018-07-24 14:56:53,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:56:52" (1/1) ... [2018-07-24 14:56:53,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:56:52" (1/1) ... [2018-07-24 14:56:53,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:56:52" (1/1) ... [2018-07-24 14:56:53,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:56:52" (1/1) ... [2018-07-24 14:56:53,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:56:52" (1/1) ... [2018-07-24 14:56:53,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 14:56:53,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 14:56:53,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 14:56:53,334 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 14:56:53,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:56:52" (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 14:56:53,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 14:56:53,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 14:56:53,404 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 14:56:53,404 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 14:56:53,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 14:56:53,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 14:56:53,405 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 14:56:53,405 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 14:56:53,405 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_output2 [2018-07-24 14:56:53,405 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_output2 [2018-07-24 14:57:06,050 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 14:57:06,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:57:06 BoogieIcfgContainer [2018-07-24 14:57:06,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 14:57:06,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 14:57:06,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 14:57:06,059 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 14:57:06,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 02:56:50" (1/3) ... [2018-07-24 14:57:06,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b32034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:57:06, skipping insertion in model container [2018-07-24 14:57:06,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:56:52" (2/3) ... [2018-07-24 14:57:06,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b32034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:57:06, skipping insertion in model container [2018-07-24 14:57:06,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:57:06" (3/3) ... [2018-07-24 14:57:06,063 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label59_true-unreach-call.c [2018-07-24 14:57:06,071 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 14:57:06,079 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 14:57:06,134 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 14:57:06,135 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 14:57:06,135 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 14:57:06,135 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 14:57:06,135 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 14:57:06,136 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 14:57:06,136 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 14:57:06,136 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 14:57:06,136 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 14:57:06,170 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-07-24 14:57:06,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-07-24 14:57:06,178 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:57:06,179 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:57:06,179 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 14:57:06,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1645437647, now seen corresponding path program 1 times [2018-07-24 14:57:06,193 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:57:06,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:57:06,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:57:06,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:57:06,251 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:57:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:57:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:57:06,668 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:57:06,669 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:57:06,669 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:57:06,675 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:57:06,691 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:57:06,692 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:57:06,695 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-07-24 14:57:16,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:57:16,574 INFO L93 Difference]: Finished difference Result 2164 states and 4009 transitions. [2018-07-24 14:57:16,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:57:16,581 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2018-07-24 14:57:16,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:57:16,628 INFO L225 Difference]: With dead ends: 2164 [2018-07-24 14:57:16,628 INFO L226 Difference]: Without dead ends: 1554 [2018-07-24 14:57:16,643 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 14:57:16,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2018-07-24 14:57:16,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1052. [2018-07-24 14:57:16,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1052 states. [2018-07-24 14:57:16,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1882 transitions. [2018-07-24 14:57:16,806 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1882 transitions. Word has length 39 [2018-07-24 14:57:16,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:57:16,807 INFO L471 AbstractCegarLoop]: Abstraction has 1052 states and 1882 transitions. [2018-07-24 14:57:16,807 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:57:16,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1882 transitions. [2018-07-24 14:57:16,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-07-24 14:57:16,817 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:57:16,817 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:57:16,817 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 14:57:16,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1698072894, now seen corresponding path program 1 times [2018-07-24 14:57:16,818 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:57:16,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:57:16,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:57:16,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:57:16,820 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:57:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:57:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:57:17,216 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:57:17,217 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-24 14:57:17,217 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:57:17,219 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:57:17,221 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:57:17,221 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-24 14:57:17,221 INFO L87 Difference]: Start difference. First operand 1052 states and 1882 transitions. Second operand 5 states. [2018-07-24 14:57:26,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:57:26,863 INFO L93 Difference]: Finished difference Result 3031 states and 5537 transitions. [2018-07-24 14:57:26,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:57:26,864 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2018-07-24 14:57:26,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:57:26,881 INFO L225 Difference]: With dead ends: 3031 [2018-07-24 14:57:26,881 INFO L226 Difference]: Without dead ends: 1985 [2018-07-24 14:57:26,886 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-07-24 14:57:26,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2018-07-24 14:57:26,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1959. [2018-07-24 14:57:26,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1959 states. [2018-07-24 14:57:26,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 3239 transitions. [2018-07-24 14:57:26,962 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 3239 transitions. Word has length 111 [2018-07-24 14:57:26,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:57:26,962 INFO L471 AbstractCegarLoop]: Abstraction has 1959 states and 3239 transitions. [2018-07-24 14:57:26,962 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:57:26,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 3239 transitions. [2018-07-24 14:57:26,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-07-24 14:57:26,967 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:57:26,967 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:57:26,967 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 14:57:26,968 INFO L82 PathProgramCache]: Analyzing trace with hash 734189537, now seen corresponding path program 1 times [2018-07-24 14:57:26,968 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:57:26,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:57:26,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:57:26,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:57:26,969 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:57:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:57:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:57:27,451 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:57:27,451 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 14:57:27,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:57:27,469 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:57:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:57:27,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:57:34,284 WARN L169 SmtUtils]: Spent 6.20 s on a formula simplification that was a NOOP. DAG size: 42 [2018-07-24 14:57:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:57:34,399 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:57:37,237 WARN L169 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2018-07-24 14:57:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:57:37,588 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:57:37,588 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-07-24 14:57:37,588 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:57:37,589 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:57:37,589 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:57:37,589 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=109, Unknown=1, NotChecked=0, Total=156 [2018-07-24 14:57:37,590 INFO L87 Difference]: Start difference. First operand 1959 states and 3239 transitions. Second operand 6 states. [2018-07-24 14:58:15,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:58:15,300 INFO L93 Difference]: Finished difference Result 7519 states and 12900 transitions. [2018-07-24 14:58:15,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 14:58:15,302 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2018-07-24 14:58:15,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:58:15,338 INFO L225 Difference]: With dead ends: 7519 [2018-07-24 14:58:15,338 INFO L226 Difference]: Without dead ends: 5566 [2018-07-24 14:58:15,354 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 223 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=46, Invalid=109, Unknown=1, NotChecked=0, Total=156 [2018-07-24 14:58:15,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5566 states. [2018-07-24 14:58:15,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5566 to 5556. [2018-07-24 14:58:15,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5556 states. [2018-07-24 14:58:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5556 states to 5556 states and 9347 transitions. [2018-07-24 14:58:15,516 INFO L78 Accepts]: Start accepts. Automaton has 5556 states and 9347 transitions. Word has length 114 [2018-07-24 14:58:15,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:58:15,516 INFO L471 AbstractCegarLoop]: Abstraction has 5556 states and 9347 transitions. [2018-07-24 14:58:15,516 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:58:15,517 INFO L276 IsEmpty]: Start isEmpty. Operand 5556 states and 9347 transitions. [2018-07-24 14:58:15,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-07-24 14:58:15,526 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:58:15,527 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:58:15,527 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 14:58:15,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1601047198, now seen corresponding path program 1 times [2018-07-24 14:58:15,528 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:58:15,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:58:15,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:58:15,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:58:15,530 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:58:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:58:15,805 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:58:15,805 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:58:15,805 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 14:58:15,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:58:15,817 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:58:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:58:15,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:58:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:58:15,967 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:58:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:58:16,098 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 14:58:16,098 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-07-24 14:58:16,098 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:58:16,099 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:58:16,099 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:58:16,099 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-07-24 14:58:16,100 INFO L87 Difference]: Start difference. First operand 5556 states and 9347 transitions. Second operand 3 states. [2018-07-24 14:58:24,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:58:24,291 INFO L93 Difference]: Finished difference Result 13727 states and 22960 transitions. [2018-07-24 14:58:24,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:58:24,292 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2018-07-24 14:58:24,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:58:24,339 INFO L225 Difference]: With dead ends: 13727 [2018-07-24 14:58:24,339 INFO L226 Difference]: Without dead ends: 8177 [2018-07-24 14:58:24,375 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 253 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-07-24 14:58:24,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8177 states. [2018-07-24 14:58:24,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8177 to 8176. [2018-07-24 14:58:24,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8176 states. [2018-07-24 14:58:24,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8176 states to 8176 states and 12764 transitions. [2018-07-24 14:58:24,712 INFO L78 Accepts]: Start accepts. Automaton has 8176 states and 12764 transitions. Word has length 127 [2018-07-24 14:58:24,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:58:24,713 INFO L471 AbstractCegarLoop]: Abstraction has 8176 states and 12764 transitions. [2018-07-24 14:58:24,713 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:58:24,713 INFO L276 IsEmpty]: Start isEmpty. Operand 8176 states and 12764 transitions. [2018-07-24 14:58:24,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-07-24 14:58:24,721 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:58:24,721 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:58:24,721 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 14:58:24,722 INFO L82 PathProgramCache]: Analyzing trace with hash -559454938, now seen corresponding path program 1 times [2018-07-24 14:58:24,722 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:58:24,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:58:24,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:58:24,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:58:24,723 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:58:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:58:24,964 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 65 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-07-24 14:58:24,964 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:58:24,964 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 14:58:24,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:58:24,972 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:58:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:58:25,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:58:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:58:25,291 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:58:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:58:25,872 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:58:25,872 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:58:25,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:58:25,888 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:58:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:58:26,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:58:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 65 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-07-24 14:58:26,255 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:58:26,415 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 14:58:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-07-24 14:58:26,587 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-07-24 14:58:26,587 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 5, 5] total 12 [2018-07-24 14:58:26,587 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:58:26,588 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:58:26,588 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:58:26,588 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:58:26,589 INFO L87 Difference]: Start difference. First operand 8176 states and 12764 transitions. Second operand 5 states. [2018-07-24 14:58:32,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:58:32,792 INFO L93 Difference]: Finished difference Result 16407 states and 25680 transitions. [2018-07-24 14:58:32,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 14:58:32,793 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 212 [2018-07-24 14:58:32,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:58:32,824 INFO L225 Difference]: With dead ends: 16407 [2018-07-24 14:58:32,824 INFO L226 Difference]: Without dead ends: 8237 [2018-07-24 14:58:32,848 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 836 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-07-24 14:58:32,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8237 states. [2018-07-24 14:58:33,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8237 to 8235. [2018-07-24 14:58:33,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8235 states. [2018-07-24 14:58:33,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8235 states to 8235 states and 10726 transitions. [2018-07-24 14:58:33,027 INFO L78 Accepts]: Start accepts. Automaton has 8235 states and 10726 transitions. Word has length 212 [2018-07-24 14:58:33,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:58:33,028 INFO L471 AbstractCegarLoop]: Abstraction has 8235 states and 10726 transitions. [2018-07-24 14:58:33,028 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:58:33,028 INFO L276 IsEmpty]: Start isEmpty. Operand 8235 states and 10726 transitions. [2018-07-24 14:58:33,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-07-24 14:58:33,036 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:58:33,037 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:58:33,037 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 14:58:33,037 INFO L82 PathProgramCache]: Analyzing trace with hash -838804128, now seen corresponding path program 1 times [2018-07-24 14:58:33,037 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:58:33,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:58:33,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:58:33,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:58:33,039 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:58:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:58:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-07-24 14:58:33,652 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:58:33,652 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:58:33,652 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:58:33,653 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:58:33,653 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:58:33,653 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:58:33,653 INFO L87 Difference]: Start difference. First operand 8235 states and 10726 transitions. Second operand 4 states. [2018-07-24 14:58:43,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:58:43,050 INFO L93 Difference]: Finished difference Result 29254 states and 39330 transitions. [2018-07-24 14:58:43,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:58:43,052 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 293 [2018-07-24 14:58:43,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:58:43,118 INFO L225 Difference]: With dead ends: 29254 [2018-07-24 14:58:43,118 INFO L226 Difference]: Without dead ends: 21025 [2018-07-24 14:58:43,152 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 14:58:43,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21025 states. [2018-07-24 14:58:43,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21025 to 21018. [2018-07-24 14:58:43,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21018 states. [2018-07-24 14:58:43,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21018 states to 21018 states and 26365 transitions. [2018-07-24 14:58:43,583 INFO L78 Accepts]: Start accepts. Automaton has 21018 states and 26365 transitions. Word has length 293 [2018-07-24 14:58:43,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:58:43,583 INFO L471 AbstractCegarLoop]: Abstraction has 21018 states and 26365 transitions. [2018-07-24 14:58:43,583 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:58:43,584 INFO L276 IsEmpty]: Start isEmpty. Operand 21018 states and 26365 transitions. [2018-07-24 14:58:43,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-07-24 14:58:43,613 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:58:43,614 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:58:43,614 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 14:58:43,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1036321573, now seen corresponding path program 1 times [2018-07-24 14:58:43,614 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:58:43,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:58:43,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:58:43,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:58:43,615 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:58:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:58:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:58:44,752 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:58:44,753 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 14:58:44,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:58:44,764 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:58:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:58:44,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:58:45,063 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:58:45,064 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:58:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:58:45,452 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:58:45,453 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 11 [2018-07-24 14:58:45,453 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:58:45,453 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:58:45,454 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:58:45,454 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:58:45,454 INFO L87 Difference]: Start difference. First operand 21018 states and 26365 transitions. Second operand 6 states. [2018-07-24 14:58:56,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:58:56,868 INFO L93 Difference]: Finished difference Result 45109 states and 56553 transitions. [2018-07-24 14:58:56,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 14:58:56,868 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 387 [2018-07-24 14:58:56,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:58:56,957 INFO L225 Difference]: With dead ends: 45109 [2018-07-24 14:58:56,957 INFO L226 Difference]: Without dead ends: 24097 [2018-07-24 14:58:56,996 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 773 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:58:57,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24097 states. [2018-07-24 14:58:57,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24097 to 23653. [2018-07-24 14:58:57,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23653 states. [2018-07-24 14:58:57,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23653 states to 23653 states and 29460 transitions. [2018-07-24 14:58:57,452 INFO L78 Accepts]: Start accepts. Automaton has 23653 states and 29460 transitions. Word has length 387 [2018-07-24 14:58:57,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:58:57,453 INFO L471 AbstractCegarLoop]: Abstraction has 23653 states and 29460 transitions. [2018-07-24 14:58:57,453 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:58:57,453 INFO L276 IsEmpty]: Start isEmpty. Operand 23653 states and 29460 transitions. [2018-07-24 14:58:57,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2018-07-24 14:58:57,523 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:58:57,524 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-07-24 14:58:57,524 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 14:58:57,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1358395422, now seen corresponding path program 1 times [2018-07-24 14:58:57,524 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:58:57,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:58:57,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:58:57,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:58:57,525 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:58:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:58:58,102 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 144 proven. 2 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2018-07-24 14:58:58,103 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:58:58,103 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 14:58:58,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:58:58,118 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:58:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:58:58,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:58:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 430 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-07-24 14:58:58,765 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:58:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 144 proven. 2 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2018-07-24 14:58:59,236 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:58:59,237 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 4 [2018-07-24 14:58:59,237 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:58:59,238 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:58:59,238 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:58:59,238 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:58:59,239 INFO L87 Difference]: Start difference. First operand 23653 states and 29460 transitions. Second operand 3 states. [2018-07-24 14:59:05,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:59:05,625 INFO L93 Difference]: Finished difference Result 65737 states and 83525 transitions. [2018-07-24 14:59:05,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:59:05,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 575 [2018-07-24 14:59:05,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:59:05,765 INFO L225 Difference]: With dead ends: 65737 [2018-07-24 14:59:05,765 INFO L226 Difference]: Without dead ends: 42090 [2018-07-24 14:59:05,834 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1152 GetRequests, 1150 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 14:59:05,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42090 states. [2018-07-24 14:59:06,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42090 to 41632. [2018-07-24 14:59:06,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41632 states. [2018-07-24 14:59:06,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41632 states to 41632 states and 51735 transitions. [2018-07-24 14:59:06,605 INFO L78 Accepts]: Start accepts. Automaton has 41632 states and 51735 transitions. Word has length 575 [2018-07-24 14:59:06,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:59:06,606 INFO L471 AbstractCegarLoop]: Abstraction has 41632 states and 51735 transitions. [2018-07-24 14:59:06,607 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:59:06,607 INFO L276 IsEmpty]: Start isEmpty. Operand 41632 states and 51735 transitions. [2018-07-24 14:59:06,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2018-07-24 14:59:06,994 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:59:06,994 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:59:06,995 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 14:59:06,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1697975846, now seen corresponding path program 1 times [2018-07-24 14:59:06,996 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:59:06,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:59:06,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:59:06,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:59:06,999 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:59:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:59:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 507 proven. 2 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2018-07-24 14:59:07,957 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:59:07,957 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:59:07,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:59:07,971 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:59:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:59:08,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:59:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 507 proven. 2 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2018-07-24 14:59:08,469 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:59:09,106 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 507 proven. 2 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2018-07-24 14:59:09,127 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:59:09,128 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:59:09,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:59:09,143 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:59:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:59:09,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:59:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 507 proven. 2 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2018-07-24 14:59:09,905 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:59:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 507 proven. 2 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2018-07-24 14:59:10,856 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:59:10,857 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-07-24 14:59:10,857 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:59:10,859 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 14:59:10,859 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 14:59:10,859 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:59:10,860 INFO L87 Difference]: Start difference. First operand 41632 states and 51735 transitions. Second operand 7 states. [2018-07-24 14:59:28,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:59:28,774 INFO L93 Difference]: Finished difference Result 103418 states and 137155 transitions. [2018-07-24 14:59:28,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 14:59:28,778 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 608 [2018-07-24 14:59:28,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:59:29,134 INFO L225 Difference]: With dead ends: 103418 [2018-07-24 14:59:29,134 INFO L226 Difference]: Without dead ends: 62226 [2018-07-24 14:59:29,325 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2444 GetRequests, 2431 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2018-07-24 14:59:29,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62226 states. [2018-07-24 14:59:30,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62226 to 59945. [2018-07-24 14:59:30,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59945 states. [2018-07-24 14:59:30,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59945 states to 59945 states and 72689 transitions. [2018-07-24 14:59:30,714 INFO L78 Accepts]: Start accepts. Automaton has 59945 states and 72689 transitions. Word has length 608 [2018-07-24 14:59:30,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:59:30,715 INFO L471 AbstractCegarLoop]: Abstraction has 59945 states and 72689 transitions. [2018-07-24 14:59:30,715 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 14:59:30,715 INFO L276 IsEmpty]: Start isEmpty. Operand 59945 states and 72689 transitions. [2018-07-24 14:59:30,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 659 [2018-07-24 14:59:30,837 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:59:30,838 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:59:30,838 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 14:59:30,839 INFO L82 PathProgramCache]: Analyzing trace with hash -35339909, now seen corresponding path program 1 times [2018-07-24 14:59:30,839 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:59:30,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:59:30,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:59:30,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:59:30,840 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:59:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:59:31,814 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2018-07-24 14:59:31,815 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:59:31,815 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:59:31,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:59:31,833 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:59:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:59:32,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:59:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 367 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-07-24 14:59:32,420 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:59:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 106 proven. 6 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2018-07-24 14:59:32,707 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:59:32,707 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2018-07-24 14:59:32,707 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:59:32,708 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:59:32,708 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:59:32,708 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:59:32,709 INFO L87 Difference]: Start difference. First operand 59945 states and 72689 transitions. Second operand 3 states. [2018-07-24 14:59:37,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:59:37,787 INFO L93 Difference]: Finished difference Result 115690 states and 139839 transitions. [2018-07-24 14:59:37,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:59:37,788 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 658 [2018-07-24 14:59:37,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:59:37,951 INFO L225 Difference]: With dead ends: 115690 [2018-07-24 14:59:37,952 INFO L226 Difference]: Without dead ends: 56359 [2018-07-24 14:59:38,052 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1319 GetRequests, 1311 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:59:38,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56359 states. [2018-07-24 14:59:38,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56359 to 55906. [2018-07-24 14:59:38,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55906 states. [2018-07-24 14:59:38,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55906 states to 55906 states and 67205 transitions. [2018-07-24 14:59:38,969 INFO L78 Accepts]: Start accepts. Automaton has 55906 states and 67205 transitions. Word has length 658 [2018-07-24 14:59:38,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:59:38,971 INFO L471 AbstractCegarLoop]: Abstraction has 55906 states and 67205 transitions. [2018-07-24 14:59:38,971 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:59:38,971 INFO L276 IsEmpty]: Start isEmpty. Operand 55906 states and 67205 transitions. [2018-07-24 14:59:39,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2018-07-24 14:59:39,083 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:59:39,084 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:59:39,084 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 14:59:39,084 INFO L82 PathProgramCache]: Analyzing trace with hash 308352889, now seen corresponding path program 1 times [2018-07-24 14:59:39,085 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:59:39,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:59:39,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:59:39,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:59:39,086 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:59:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:59:39,920 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 143 proven. 395 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2018-07-24 14:59:39,921 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:59:39,921 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 14:59:39,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:59:39,928 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:59:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:59:40,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:59:40,609 WARN L169 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-07-24 14:59:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 411 proven. 2 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2018-07-24 14:59:41,219 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:59:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 143 proven. 403 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2018-07-24 14:59:42,451 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:59:42,452 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 14:59:42,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:59:42,467 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:59:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:59:43,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:59:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 411 proven. 2 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2018-07-24 14:59:43,400 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:59:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 143 proven. 403 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2018-07-24 14:59:44,968 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:59:44,968 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 8] total 15 [2018-07-24 14:59:44,968 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:59:44,969 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-24 14:59:44,970 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-24 14:59:44,970 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-07-24 14:59:44,970 INFO L87 Difference]: Start difference. First operand 55906 states and 67205 transitions. Second operand 10 states. [2018-07-24 15:00:13,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:00:13,785 INFO L93 Difference]: Finished difference Result 156636 states and 205846 transitions. [2018-07-24 15:00:13,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-24 15:00:13,785 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 728 [2018-07-24 15:00:13,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:00:14,381 INFO L225 Difference]: With dead ends: 156636 [2018-07-24 15:00:14,381 INFO L226 Difference]: Without dead ends: 101221 [2018-07-24 15:00:14,705 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2945 GetRequests, 2912 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=228, Invalid=528, Unknown=0, NotChecked=0, Total=756 [2018-07-24 15:00:14,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101221 states. [2018-07-24 15:00:16,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101221 to 96628. [2018-07-24 15:00:16,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96628 states. [2018-07-24 15:00:17,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96628 states to 96628 states and 116501 transitions. [2018-07-24 15:00:17,058 INFO L78 Accepts]: Start accepts. Automaton has 96628 states and 116501 transitions. Word has length 728 [2018-07-24 15:00:17,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:00:17,059 INFO L471 AbstractCegarLoop]: Abstraction has 96628 states and 116501 transitions. [2018-07-24 15:00:17,059 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-24 15:00:17,059 INFO L276 IsEmpty]: Start isEmpty. Operand 96628 states and 116501 transitions. [2018-07-24 15:00:17,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2018-07-24 15:00:17,311 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:00:17,312 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:17,312 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 15:00:17,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1699604794, now seen corresponding path program 1 times [2018-07-24 15:00:17,313 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:00:17,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:00:17,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:00:17,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:00:17,314 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:00:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:00:18,887 WARN L169 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-07-24 15:00:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 141 proven. 447 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2018-07-24 15:00:19,778 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:00:19,778 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 15:00:19,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:00:19,786 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:00:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:00:20,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:00:20,777 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 333 proven. 0 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2018-07-24 15:00:20,777 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:00:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 128 proven. 289 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2018-07-24 15:00:21,944 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 15:00:21,944 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 5] total 13 [2018-07-24 15:00:21,944 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:00:21,945 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 15:00:21,945 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 15:00:21,945 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2018-07-24 15:00:21,946 INFO L87 Difference]: Start difference. First operand 96628 states and 116501 transitions. Second operand 5 states. [2018-07-24 15:00:34,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:00:34,952 INFO L93 Difference]: Finished difference Result 204968 states and 247014 transitions. [2018-07-24 15:00:34,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 15:00:34,952 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 750 [2018-07-24 15:00:34,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:00:35,257 INFO L225 Difference]: With dead ends: 204968 [2018-07-24 15:00:35,257 INFO L226 Difference]: Without dead ends: 105446 [2018-07-24 15:00:35,484 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1511 GetRequests, 1498 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2018-07-24 15:00:35,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105446 states. [2018-07-24 15:00:37,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105446 to 103636. [2018-07-24 15:00:37,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103636 states. [2018-07-24 15:00:38,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103636 states to 103636 states and 123845 transitions. [2018-07-24 15:00:38,036 INFO L78 Accepts]: Start accepts. Automaton has 103636 states and 123845 transitions. Word has length 750 [2018-07-24 15:00:38,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:00:38,037 INFO L471 AbstractCegarLoop]: Abstraction has 103636 states and 123845 transitions. [2018-07-24 15:00:38,037 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 15:00:38,037 INFO L276 IsEmpty]: Start isEmpty. Operand 103636 states and 123845 transitions. [2018-07-24 15:00:38,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2018-07-24 15:00:38,290 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:00:38,291 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:38,293 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 15:00:38,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1172703722, now seen corresponding path program 1 times [2018-07-24 15:00:38,293 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:00:38,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:00:38,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:00:38,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:00:38,295 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:00:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:00:39,154 WARN L169 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-07-24 15:00:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 591 proven. 464 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-07-24 15:00:40,915 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:00:40,915 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:00:40,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:00:40,923 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:00:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:00:41,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:00:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 663 proven. 2 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2018-07-24 15:00:41,613 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:00:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 248 proven. 297 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2018-07-24 15:00:42,373 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:00:42,374 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 15:00:42,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:00:42,761 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:00:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:00:43,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-07-24 15:00:43,821 WARN L177 SmtUtils]: Removed 3 from assertion stack [2018-07-24 15:00:43,822 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-07-24 15:00:44,023 WARN L512 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 15:00:44,023 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 15:00:44,029 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 15:00:44,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 03:00:44 BoogieIcfgContainer [2018-07-24 15:00:44,029 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 15:00:44,030 INFO L168 Benchmark]: Toolchain (without parser) took 233669.90 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 2.9 GB in the end (delta: -1.5 GB). Peak memory consumption was 751.0 MB. Max. memory is 7.1 GB. [2018-07-24 15:00:44,031 INFO L168 Benchmark]: CDTParser took 0.24 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 15:00:44,032 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1875.02 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 190.3 MB). Peak memory consumption was 190.3 MB. Max. memory is 7.1 GB. [2018-07-24 15:00:44,033 INFO L168 Benchmark]: Boogie Procedure Inliner took 284.56 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-07-24 15:00:44,033 INFO L168 Benchmark]: Boogie Preprocessor took 809.53 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 932.7 MB). Free memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 123.6 MB. Max. memory is 7.1 GB. [2018-07-24 15:00:44,034 INFO L168 Benchmark]: RCFGBuilder took 12718.73 ms. Allocated memory is still 2.5 GB. Free memory was 2.3 GB in the beginning and 1.8 GB in the end (delta: 493.3 MB). Peak memory consumption was 493.3 MB. Max. memory is 7.1 GB. [2018-07-24 15:00:44,035 INFO L168 Benchmark]: TraceAbstraction took 217976.32 ms. Allocated memory was 2.5 GB in the beginning and 3.8 GB in the end (delta: 1.3 GB). Free memory was 1.8 GB in the beginning and 2.9 GB in the end (delta: -1.1 GB). Peak memory consumption was 233.1 MB. Max. memory is 7.1 GB. [2018-07-24 15:00:44,041 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 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 1875.02 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 190.3 MB). Peak memory consumption was 190.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 284.56 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 809.53 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 932.7 MB). Free memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 123.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 12718.73 ms. Allocated memory is still 2.5 GB. Free memory was 2.3 GB in the beginning and 1.8 GB in the end (delta: 493.3 MB). Peak memory consumption was 493.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 217976.32 ms. Allocated memory was 2.5 GB in the beginning and 3.8 GB in the end (delta: 1.3 GB). Free memory was 1.8 GB in the beginning and 2.9 GB in the end (delta: -1.1 GB). Peak memory consumption was 233.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 104]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 104). Cancelled while BasicCegarLoop was analyzing trace of length 826 with TraceHistMax 6, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 6. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 217.9s OverallTime, 13 OverallIterations, 6 TraceHistogramMax, 166.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3941 SDtfs, 18170 SDslu, 2709 SDs, 0 SdLazy, 38842 SolverSat, 9832 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 145.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11530 GetRequests, 11396 SyntacticMatches, 31 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 15.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103636occurred in iteration=12, 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: 9.7s AutomataMinimizationTime, 12 MinimizatonAttempts, 10587 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 3.1s SatisfiabilityAnalysisTime, 28.1s InterpolantComputationTime, 10309 NumberOfCodeBlocks, 10309 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 15980 ConstructedInterpolants, 266 QuantifiedInterpolants, 22850862 SizeOfPredicates, 23 NumberOfNonLiveVariables, 8517 ConjunctsInSsa, 89 ConjunctsInUnsatCore, 36 InterpolantComputations, 11 PerfectInterpolantSequences, 12784/14882 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/Problem17_label59_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_15-00-44-054.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem17_label59_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_15-00-44-054.csv Completed graceful shutdown