java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label08_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ddc4263 [2018-08-07 13:00:11,364 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-08-07 13:00:11,366 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-08-07 13:00:11,387 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-08-07 13:00:11,388 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-08-07 13:00:11,389 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-08-07 13:00:11,391 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-08-07 13:00:11,393 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-08-07 13:00:11,396 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-08-07 13:00:11,397 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-08-07 13:00:11,407 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-08-07 13:00:11,407 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-08-07 13:00:11,408 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-08-07 13:00:11,409 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-08-07 13:00:11,414 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-08-07 13:00:11,415 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-08-07 13:00:11,416 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-08-07 13:00:11,418 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-08-07 13:00:11,420 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-08-07 13:00:11,421 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-08-07 13:00:11,423 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-08-07 13:00:11,424 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-08-07 13:00:11,426 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-08-07 13:00:11,427 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-08-07 13:00:11,427 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-08-07 13:00:11,428 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-08-07 13:00:11,429 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-08-07 13:00:11,429 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-08-07 13:00:11,430 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-08-07 13:00:11,432 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-08-07 13:00:11,434 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-08-07 13:00:11,435 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-08-07 13:00:11,435 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-08-07 13:00:11,437 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-08-07 13:00:11,439 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-08-07 13:00:11,440 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-08-07 13:00:11,440 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 [2018-08-07 13:00:11,469 INFO L110 SettingsManager]: Loading preferences was successful [2018-08-07 13:00:11,470 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-08-07 13:00:11,471 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-08-07 13:00:11,471 INFO L133 SettingsManager]: * User list type=DISABLED [2018-08-07 13:00:11,472 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-08-07 13:00:11,472 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-08-07 13:00:11,472 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-08-07 13:00:11,472 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-08-07 13:00:11,475 INFO L133 SettingsManager]: * Log string format=TERM [2018-08-07 13:00:11,475 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-08-07 13:00:11,475 INFO L133 SettingsManager]: * Interval Domain=false [2018-08-07 13:00:11,476 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-08-07 13:00:11,476 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-08-07 13:00:11,477 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-08-07 13:00:11,477 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-08-07 13:00:11,477 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-08-07 13:00:11,477 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-08-07 13:00:11,477 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-08-07 13:00:11,478 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-08-07 13:00:11,478 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-08-07 13:00:11,478 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-08-07 13:00:11,478 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-08-07 13:00:11,478 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-08-07 13:00:11,479 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 13:00:11,479 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-08-07 13:00:11,479 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-08-07 13:00:11,479 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-08-07 13:00:11,480 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-08-07 13:00:11,480 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-08-07 13:00:11,480 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-08-07 13:00:11,480 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-08-07 13:00:11,480 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-08-07 13:00:11,481 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-08-07 13:00:11,533 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-08-07 13:00:11,551 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-08-07 13:00:11,557 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-08-07 13:00:11,559 INFO L271 PluginConnector]: Initializing CDTParser... [2018-08-07 13:00:11,559 INFO L276 PluginConnector]: CDTParser initialized [2018-08-07 13:00:11,560 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label08_true-unreach-call.c [2018-08-07 13:00:11,917 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/627a2484a/fdecc894990848108cc7d8942b0c0a51/FLAGad402a01c [2018-08-07 13:00:12,348 INFO L276 CDTParser]: Found 1 translation units. [2018-08-07 13:00:12,349 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label08_true-unreach-call.c [2018-08-07 13:00:12,380 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/627a2484a/fdecc894990848108cc7d8942b0c0a51/FLAGad402a01c [2018-08-07 13:00:12,396 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/627a2484a/fdecc894990848108cc7d8942b0c0a51 [2018-08-07 13:00:12,408 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-08-07 13:00:12,410 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-08-07 13:00:12,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-08-07 13:00:12,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-08-07 13:00:12,419 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-08-07 13:00:12,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 01:00:12" (1/1) ... [2018-08-07 13:00:12,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@90a6c56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:12, skipping insertion in model container [2018-08-07 13:00:12,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 01:00:12" (1/1) ... [2018-08-07 13:00:12,672 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-08-07 13:00:13,393 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 13:00:13,410 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-08-07 13:00:13,848 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 13:00:14,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:14 WrapperNode [2018-08-07 13:00:14,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-08-07 13:00:14,105 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-08-07 13:00:14,106 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-08-07 13:00:14,106 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-08-07 13:00:14,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:14" (1/1) ... [2018-08-07 13:00:14,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:14" (1/1) ... [2018-08-07 13:00:14,394 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-08-07 13:00:14,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-08-07 13:00:14,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-08-07 13:00:14,395 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-08-07 13:00:14,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:14" (1/1) ... [2018-08-07 13:00:14,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:14" (1/1) ... [2018-08-07 13:00:15,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:14" (1/1) ... [2018-08-07 13:00:15,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:14" (1/1) ... [2018-08-07 13:00:15,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:14" (1/1) ... [2018-08-07 13:00:15,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:14" (1/1) ... [2018-08-07 13:00:15,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:14" (1/1) ... [2018-08-07 13:00:15,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-08-07 13:00:15,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-08-07 13:00:15,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-08-07 13:00:15,279 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-08-07 13:00:15,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 13:00:15,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-08-07 13:00:15,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-08-07 13:00:15,355 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 [2018-08-07 13:00:15,355 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 [2018-08-07 13:00:15,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-08-07 13:00:15,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-08-07 13:00:15,356 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-08-07 13:00:15,356 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-08-07 13:00:15,356 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 [2018-08-07 13:00:15,356 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 [2018-08-07 13:00:25,428 INFO L273 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-08-07 13:00:25,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 01:00:25 BoogieIcfgContainer [2018-08-07 13:00:25,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-08-07 13:00:25,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-08-07 13:00:25,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-08-07 13:00:25,433 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-08-07 13:00:25,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.08 01:00:12" (1/3) ... [2018-08-07 13:00:25,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d8691c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 01:00:25, skipping insertion in model container [2018-08-07 13:00:25,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:00:14" (2/3) ... [2018-08-07 13:00:25,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d8691c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 01:00:25, skipping insertion in model container [2018-08-07 13:00:25,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 01:00:25" (3/3) ... [2018-08-07 13:00:25,437 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label08_true-unreach-call.c [2018-08-07 13:00:25,447 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-08-07 13:00:25,457 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-08-07 13:00:25,521 INFO L129 ementStrategyFactory]: Using default assertion order modulation [2018-08-07 13:00:25,522 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-08-07 13:00:25,522 INFO L382 AbstractCegarLoop]: Hoare is true [2018-08-07 13:00:25,522 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-08-07 13:00:25,523 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-08-07 13:00:25,523 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-08-07 13:00:25,523 INFO L386 AbstractCegarLoop]: Difference is false [2018-08-07 13:00:25,523 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-08-07 13:00:25,523 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-08-07 13:00:25,560 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-08-07 13:00:25,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-08-07 13:00:25,577 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:00:25,579 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:00:25,580 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:00:25,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1411621241, now seen corresponding path program 1 times [2018-08-07 13:00:25,588 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:00:25,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:00:25,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:00:25,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:00:25,637 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:00:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:00:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 13:00:26,199 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 13:00:26,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-08-07 13:00:26,200 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:00:26,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-07 13:00:26,225 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-07 13:00:26,225 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 13:00:26,228 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-08-07 13:00:38,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:00:38,464 INFO L93 Difference]: Finished difference Result 2139 states and 3961 transitions. [2018-08-07 13:00:38,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-08-07 13:00:38,466 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2018-08-07 13:00:38,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:00:38,498 INFO L225 Difference]: With dead ends: 2139 [2018-08-07 13:00:38,498 INFO L226 Difference]: Without dead ends: 1529 [2018-08-07 13:00:38,508 INFO L603 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 [2018-08-07 13:00:38,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2018-08-07 13:00:38,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1527. [2018-08-07 13:00:38,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1527 states. [2018-08-07 13:00:38,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2413 transitions. [2018-08-07 13:00:38,666 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2413 transitions. Word has length 65 [2018-08-07 13:00:38,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:00:38,667 INFO L480 AbstractCegarLoop]: Abstraction has 1527 states and 2413 transitions. [2018-08-07 13:00:38,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-08-07 13:00:38,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2413 transitions. [2018-08-07 13:00:38,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-08-07 13:00:38,686 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:00:38,686 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:00:38,687 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:00:38,688 INFO L82 PathProgramCache]: Analyzing trace with hash -984429111, now seen corresponding path program 1 times [2018-08-07 13:00:38,688 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:00:38,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:00:38,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:00:38,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:00:38,690 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:00:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:00:39,585 WARN L170 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-08-07 13:00:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 13:00:39,640 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:00:39,640 INFO L194 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 [2018-08-07 13:00:39,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:00:39,658 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:00:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:00:39,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:00:43,742 WARN L170 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 32 [2018-08-07 13:00:44,069 WARN L170 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 14 [2018-08-07 13:00:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 13:00:44,264 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:00:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 13:00:44,885 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 13:00:44,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 11 [2018-08-07 13:00:44,886 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:00:44,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 13:00:44,888 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 13:00:44,888 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=78, Unknown=1, NotChecked=0, Total=110 [2018-08-07 13:00:44,888 INFO L87 Difference]: Start difference. First operand 1527 states and 2413 transitions. Second operand 3 states. [2018-08-07 13:00:54,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:00:54,574 INFO L93 Difference]: Finished difference Result 4365 states and 7037 transitions. [2018-08-07 13:00:54,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 13:00:54,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 140 [2018-08-07 13:00:54,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:00:54,602 INFO L225 Difference]: With dead ends: 4365 [2018-08-07 13:00:54,602 INFO L226 Difference]: Without dead ends: 2844 [2018-08-07 13:00:54,611 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 276 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=31, Invalid=78, Unknown=1, NotChecked=0, Total=110 [2018-08-07 13:00:54,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2844 states. [2018-08-07 13:00:54,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2844 to 2841. [2018-08-07 13:00:54,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2841 states. [2018-08-07 13:00:54,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2841 states to 2841 states and 4252 transitions. [2018-08-07 13:00:54,715 INFO L78 Accepts]: Start accepts. Automaton has 2841 states and 4252 transitions. Word has length 140 [2018-08-07 13:00:54,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:00:54,716 INFO L480 AbstractCegarLoop]: Abstraction has 2841 states and 4252 transitions. [2018-08-07 13:00:54,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 13:00:54,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2841 states and 4252 transitions. [2018-08-07 13:00:54,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-08-07 13:00:54,729 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:00:54,731 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-08-07 13:00:54,731 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:00:54,731 INFO L82 PathProgramCache]: Analyzing trace with hash 710313705, now seen corresponding path program 1 times [2018-08-07 13:00:54,732 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:00:54,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:00:54,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:00:54,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:00:54,734 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:00:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:00:55,044 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 13:00:55,045 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 13:00:55,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-08-07 13:00:55,045 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:00:55,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 13:00:55,046 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 13:00:55,046 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 13:00:55,047 INFO L87 Difference]: Start difference. First operand 2841 states and 4252 transitions. Second operand 6 states. [2018-08-07 13:01:02,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:01:02,971 INFO L93 Difference]: Finished difference Result 8438 states and 13151 transitions. [2018-08-07 13:01:02,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 13:01:02,973 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 181 [2018-08-07 13:01:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:01:03,016 INFO L225 Difference]: With dead ends: 8438 [2018-08-07 13:01:03,017 INFO L226 Difference]: Without dead ends: 5603 [2018-08-07 13:01:03,031 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-08-07 13:01:03,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5603 states. [2018-08-07 13:01:03,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5603 to 5559. [2018-08-07 13:01:03,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5559 states. [2018-08-07 13:01:03,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5559 states to 5559 states and 7990 transitions. [2018-08-07 13:01:03,237 INFO L78 Accepts]: Start accepts. Automaton has 5559 states and 7990 transitions. Word has length 181 [2018-08-07 13:01:03,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:01:03,238 INFO L480 AbstractCegarLoop]: Abstraction has 5559 states and 7990 transitions. [2018-08-07 13:01:03,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 13:01:03,238 INFO L276 IsEmpty]: Start isEmpty. Operand 5559 states and 7990 transitions. [2018-08-07 13:01:03,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-08-07 13:01:03,246 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:01:03,246 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:01:03,246 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:01:03,247 INFO L82 PathProgramCache]: Analyzing trace with hash -2144196368, now seen corresponding path program 1 times [2018-08-07 13:01:03,247 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:01:03,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:01:03,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:01:03,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:01:03,248 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:01:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:01:03,683 WARN L170 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 13:01:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 117 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-08-07 13:01:04,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:01:04,013 INFO L194 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 [2018-08-07 13:01:04,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:01:04,024 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:01:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:01:04,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:01:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 13:01:04,253 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:01:04,472 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 13:01:04,493 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:01:04,493 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 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 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 13:01:04,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:01:04,511 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:01:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:01:04,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:01:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-08-07 13:01:04,799 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:01:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-08-07 13:01:05,261 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-08-07 13:01:05,261 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 5, 5] total 12 [2018-08-07 13:01:05,261 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:01:05,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 13:01:05,263 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 13:01:05,263 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-08-07 13:01:05,263 INFO L87 Difference]: Start difference. First operand 5559 states and 7990 transitions. Second operand 5 states. [2018-08-07 13:01:11,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:01:11,921 INFO L93 Difference]: Finished difference Result 13785 states and 19752 transitions. [2018-08-07 13:01:11,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-08-07 13:01:11,922 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 223 [2018-08-07 13:01:11,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:01:11,965 INFO L225 Difference]: With dead ends: 13785 [2018-08-07 13:01:11,965 INFO L226 Difference]: Without dead ends: 8232 [2018-08-07 13:01:11,990 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 880 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-08-07 13:01:11,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8232 states. [2018-08-07 13:01:12,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8232 to 8232. [2018-08-07 13:01:12,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8232 states. [2018-08-07 13:01:12,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8232 states to 8232 states and 10448 transitions. [2018-08-07 13:01:12,297 INFO L78 Accepts]: Start accepts. Automaton has 8232 states and 10448 transitions. Word has length 223 [2018-08-07 13:01:12,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:01:12,298 INFO L480 AbstractCegarLoop]: Abstraction has 8232 states and 10448 transitions. [2018-08-07 13:01:12,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 13:01:12,298 INFO L276 IsEmpty]: Start isEmpty. Operand 8232 states and 10448 transitions. [2018-08-07 13:01:12,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-08-07 13:01:12,307 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:01:12,308 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:01:12,308 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:01:12,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1371974825, now seen corresponding path program 1 times [2018-08-07 13:01:12,308 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:01:12,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:01:12,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:01:12,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:01:12,310 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:01:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:01:12,616 WARN L170 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 13:01:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 130 proven. 66 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-08-07 13:01:13,192 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:01:13,192 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 13:01:13,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:01:13,211 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:01:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:01:13,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:01:13,455 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-08-07 13:01:13,455 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:01:13,521 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-08-07 13:01:13,542 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-08-07 13:01:13,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-08-07 13:01:13,542 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:01:13,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 13:01:13,543 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 13:01:13,543 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-08-07 13:01:13,543 INFO L87 Difference]: Start difference. First operand 8232 states and 10448 transitions. Second operand 3 states. [2018-08-07 13:01:19,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:01:19,545 INFO L93 Difference]: Finished difference Result 16885 states and 21463 transitions. [2018-08-07 13:01:19,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 13:01:19,549 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 240 [2018-08-07 13:01:19,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:01:19,583 INFO L225 Difference]: With dead ends: 16885 [2018-08-07 13:01:19,583 INFO L226 Difference]: Without dead ends: 8659 [2018-08-07 13:01:19,615 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 480 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-08-07 13:01:19,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8659 states. [2018-08-07 13:01:19,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8659 to 8223. [2018-08-07 13:01:19,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8223 states. [2018-08-07 13:01:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8223 states to 8223 states and 9951 transitions. [2018-08-07 13:01:19,779 INFO L78 Accepts]: Start accepts. Automaton has 8223 states and 9951 transitions. Word has length 240 [2018-08-07 13:01:19,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:01:19,780 INFO L480 AbstractCegarLoop]: Abstraction has 8223 states and 9951 transitions. [2018-08-07 13:01:19,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 13:01:19,780 INFO L276 IsEmpty]: Start isEmpty. Operand 8223 states and 9951 transitions. [2018-08-07 13:01:19,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-08-07 13:01:19,787 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:01:19,787 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:01:19,788 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:01:19,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1683099447, now seen corresponding path program 1 times [2018-08-07 13:01:19,788 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:01:19,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:01:19,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:01:19,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:01:19,789 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:01:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:01:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 116 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 13:01:20,352 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:01:20,352 INFO L194 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 [2018-08-07 13:01:20,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:01:20,367 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:01:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:01:20,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:01:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-08-07 13:01:20,572 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:01:20,793 WARN L170 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-08-07 13:01:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 116 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 13:01:21,170 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 13:01:21,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2018-08-07 13:01:21,170 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:01:21,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 13:01:21,171 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 13:01:21,171 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-08-07 13:01:21,172 INFO L87 Difference]: Start difference. First operand 8223 states and 9951 transitions. Second operand 5 states. [2018-08-07 13:01:30,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:01:30,493 INFO L93 Difference]: Finished difference Result 20064 states and 24054 transitions. [2018-08-07 13:01:30,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 13:01:30,494 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 252 [2018-08-07 13:01:30,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:01:30,539 INFO L225 Difference]: With dead ends: 20064 [2018-08-07 13:01:30,539 INFO L226 Difference]: Without dead ends: 11411 [2018-08-07 13:01:30,565 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2018-08-07 13:01:30,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11411 states. [2018-08-07 13:01:30,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11411 to 10180. [2018-08-07 13:01:30,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10180 states. [2018-08-07 13:01:30,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10180 states to 10180 states and 12183 transitions. [2018-08-07 13:01:30,758 INFO L78 Accepts]: Start accepts. Automaton has 10180 states and 12183 transitions. Word has length 252 [2018-08-07 13:01:30,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:01:30,759 INFO L480 AbstractCegarLoop]: Abstraction has 10180 states and 12183 transitions. [2018-08-07 13:01:30,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 13:01:30,759 INFO L276 IsEmpty]: Start isEmpty. Operand 10180 states and 12183 transitions. [2018-08-07 13:01:30,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-08-07 13:01:30,769 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:01:30,770 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:01:30,770 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:01:30,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1405792776, now seen corresponding path program 1 times [2018-08-07 13:01:30,770 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:01:30,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:01:30,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:01:30,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:01:30,771 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:01:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:01:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 319 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-08-07 13:01:31,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:01:31,155 INFO L194 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 [2018-08-07 13:01:31,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:01:31,164 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:01:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:01:31,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:02:32,421 WARN L170 SmtUtils]: Spent 55.97 s on a formula simplification. DAG size of input: 11268 DAG size of output: 26 [2018-08-07 13:02:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2018-08-07 13:02:32,679 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:02:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2018-08-07 13:02:33,018 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-08-07 13:02:33,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-08-07 13:02:33,019 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:02:33,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 13:02:33,019 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 13:02:33,020 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-08-07 13:02:33,020 INFO L87 Difference]: Start difference. First operand 10180 states and 12183 transitions. Second operand 3 states. [2018-08-07 13:03:30,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:03:30,330 INFO L93 Difference]: Finished difference Result 28377 states and 34795 transitions. [2018-08-07 13:03:30,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 13:03:30,332 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 312 [2018-08-07 13:03:30,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:03:30,399 INFO L225 Difference]: With dead ends: 28377 [2018-08-07 13:03:30,399 INFO L226 Difference]: Without dead ends: 18638 [2018-08-07 13:03:30,419 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 629 GetRequests, 622 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 60.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-08-07 13:03:30,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18638 states. [2018-08-07 13:03:30,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18638 to 17293. [2018-08-07 13:03:30,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17293 states. [2018-08-07 13:03:30,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17293 states to 17293 states and 20522 transitions. [2018-08-07 13:03:30,853 INFO L78 Accepts]: Start accepts. Automaton has 17293 states and 20522 transitions. Word has length 312 [2018-08-07 13:03:30,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:03:30,855 INFO L480 AbstractCegarLoop]: Abstraction has 17293 states and 20522 transitions. [2018-08-07 13:03:30,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 13:03:30,855 INFO L276 IsEmpty]: Start isEmpty. Operand 17293 states and 20522 transitions. [2018-08-07 13:03:30,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-08-07 13:03:30,868 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:03:30,869 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:03:30,869 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:03:30,869 INFO L82 PathProgramCache]: Analyzing trace with hash -955073841, now seen corresponding path program 1 times [2018-08-07 13:03:30,869 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:03:30,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:03:30,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:03:30,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:03:30,871 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:03:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:03:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 329 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-08-07 13:03:31,289 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:03:31,289 INFO L194 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 [2018-08-07 13:03:31,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:03:31,303 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:03:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:03:31,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:03:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 329 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-08-07 13:03:31,593 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:03:31,742 WARN L170 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-08-07 13:03:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 329 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-08-07 13:03:31,907 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:03:31,908 INFO L194 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 [2018-08-07 13:03:31,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:03:31,924 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:03:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:03:32,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:03:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 329 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-08-07 13:03:32,255 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:03:32,374 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 329 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-08-07 13:03:32,376 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 13:03:32,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 8 [2018-08-07 13:03:32,377 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 13:03:32,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 13:03:32,378 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 13:03:32,378 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-08-07 13:03:32,379 INFO L87 Difference]: Start difference. First operand 17293 states and 20522 transitions. Second operand 6 states. [2018-08-07 13:03:47,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:03:47,888 INFO L93 Difference]: Finished difference Result 43575 states and 53105 transitions. [2018-08-07 13:03:47,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-08-07 13:03:47,888 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 317 [2018-08-07 13:03:47,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:03:47,969 INFO L225 Difference]: With dead ends: 43575 [2018-08-07 13:03:47,969 INFO L226 Difference]: Without dead ends: 26723 [2018-08-07 13:03:48,002 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1281 GetRequests, 1268 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2018-08-07 13:03:48,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26723 states. [2018-08-07 13:03:48,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26723 to 25753. [2018-08-07 13:03:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25753 states. [2018-08-07 13:03:48,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25753 states to 25753 states and 29787 transitions. [2018-08-07 13:03:48,414 INFO L78 Accepts]: Start accepts. Automaton has 25753 states and 29787 transitions. Word has length 317 [2018-08-07 13:03:48,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:03:48,415 INFO L480 AbstractCegarLoop]: Abstraction has 25753 states and 29787 transitions. [2018-08-07 13:03:48,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 13:03:48,415 INFO L276 IsEmpty]: Start isEmpty. Operand 25753 states and 29787 transitions. [2018-08-07 13:03:48,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-08-07 13:03:48,431 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:03:48,432 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:03:48,432 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:03:48,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1921527175, now seen corresponding path program 1 times [2018-08-07 13:03:48,432 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:03:48,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:03:48,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:03:48,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:03:48,434 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:03:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:03:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 180 proven. 214 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-08-07 13:03:48,948 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:03:48,948 INFO L194 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 [2018-08-07 13:03:48,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:03:48,959 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:03:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:03:49,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:03:49,864 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 340 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-08-07 13:03:49,865 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:03:50,228 WARN L170 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2018-08-07 13:03:50,359 WARN L170 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2018-08-07 13:03:50,576 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 252 proven. 76 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-08-07 13:03:50,596 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:03:50,596 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 13:03:50,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:03:50,612 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:03:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:03:50,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:03:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 268 proven. 2 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2018-08-07 13:03:51,110 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:03:51,737 WARN L170 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 8 [2018-08-07 13:03:52,619 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 182 proven. 142 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-08-07 13:03:52,621 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 13:03:52,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5, 5, 5] total 18 [2018-08-07 13:03:52,622 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 13:03:52,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-08-07 13:03:52,623 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-08-07 13:03:52,623 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2018-08-07 13:03:52,624 INFO L87 Difference]: Start difference. First operand 25753 states and 29787 transitions. Second operand 12 states. [2018-08-07 13:04:17,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:04:17,504 INFO L93 Difference]: Finished difference Result 63427 states and 73875 transitions. [2018-08-07 13:04:17,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-08-07 13:04:17,509 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 327 [2018-08-07 13:04:17,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:04:17,565 INFO L225 Difference]: With dead ends: 63427 [2018-08-07 13:04:17,566 INFO L226 Difference]: Without dead ends: 22938 [2018-08-07 13:04:17,636 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1422 GetRequests, 1351 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=852, Invalid=4118, Unknown=0, NotChecked=0, Total=4970 [2018-08-07 13:04:17,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22938 states. [2018-08-07 13:04:17,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22938 to 20830. [2018-08-07 13:04:17,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20830 states. [2018-08-07 13:04:17,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20830 states to 20830 states and 23503 transitions. [2018-08-07 13:04:17,996 INFO L78 Accepts]: Start accepts. Automaton has 20830 states and 23503 transitions. Word has length 327 [2018-08-07 13:04:17,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:04:17,996 INFO L480 AbstractCegarLoop]: Abstraction has 20830 states and 23503 transitions. [2018-08-07 13:04:17,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-08-07 13:04:17,996 INFO L276 IsEmpty]: Start isEmpty. Operand 20830 states and 23503 transitions. [2018-08-07 13:04:18,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-08-07 13:04:18,000 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:04:18,001 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:04:18,001 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:04:18,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1023525679, now seen corresponding path program 1 times [2018-08-07 13:04:18,001 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:04:18,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:04:18,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:04:18,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:04:18,003 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:04:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:04:18,580 WARN L170 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2018-08-07 13:04:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 296 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-08-07 13:04:18,718 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:04:18,718 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 13:04:18,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:04:18,727 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:04:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:04:18,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:04:21,323 WARN L170 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 80 DAG size of output: 21 Received shutdown request... [2018-08-07 13:04:24,616 WARN L170 SmtUtils]: Spent 3.14 s on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2018-08-07 13:04:24,618 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-08-07 13:04:24,819 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 13:04:24,819 WARN L549 AbstractCegarLoop]: Verification canceled [2018-08-07 13:04:24,825 WARN L202 ceAbstractionStarter]: Timeout [2018-08-07 13:04:24,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.08 01:04:24 BoogieIcfgContainer [2018-08-07 13:04:24,825 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-08-07 13:04:24,826 INFO L168 Benchmark]: Toolchain (without parser) took 252417.69 ms. Allocated memory was 1.5 GB in the beginning and 3.4 GB in the end (delta: 1.8 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -384.3 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-08-07 13:04:24,827 INFO L168 Benchmark]: CDTParser took 0.21 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. [2018-08-07 13:04:24,828 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1693.83 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: 179.7 MB). Peak memory consumption was 179.7 MB. Max. memory is 7.1 GB. [2018-08-07 13:04:24,831 INFO L168 Benchmark]: Boogie Procedure Inliner took 288.55 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: 53.4 MB). Peak memory consumption was 53.4 MB. Max. memory is 7.1 GB. [2018-08-07 13:04:24,832 INFO L168 Benchmark]: Boogie Preprocessor took 884.51 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 928.5 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. [2018-08-07 13:04:24,833 INFO L168 Benchmark]: RCFGBuilder took 10150.07 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: 499.6 MB). Peak memory consumption was 499.6 MB. Max. memory is 7.1 GB. [2018-08-07 13:04:24,833 INFO L168 Benchmark]: TraceAbstraction took 239395.46 ms. Allocated memory was 2.5 GB in the beginning and 3.4 GB in the end (delta: 910.7 MB). Free memory was 1.8 GB in the beginning and 1.8 GB in the end (delta: 34.4 MB). Peak memory consumption was 945.1 MB. Max. memory is 7.1 GB. [2018-08-07 13:04:24,846 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 1693.83 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: 179.7 MB). Peak memory consumption was 179.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 288.55 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: 53.4 MB). Peak memory consumption was 53.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 884.51 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 928.5 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 10150.07 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: 499.6 MB). Peak memory consumption was 499.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 239395.46 ms. Allocated memory was 2.5 GB in the beginning and 3.4 GB in the end (delta: 910.7 MB). Free memory was 1.8 GB in the beginning and 1.8 GB in the end (delta: 34.4 MB). Peak memory consumption was 945.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 182]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 182). Cancelled while BasicCegarLoop was analyzing trace of length 345 with TraceHistMax 4, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 4 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 239.3s OverallTime, 10 OverallIterations, 4 TraceHistogramMax, 150.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4279 SDtfs, 17572 SDslu, 2628 SDs, 0 SdLazy, 30885 SolverSat, 7356 SolverUnsat, 22 SolverUnknown, 0 SolverNotchecked, 136.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5540 GetRequests, 5384 SyntacticMatches, 23 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 71.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25753occurred in iteration=8, 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: 2.3s AutomataMinimizationTime, 9 MinimizatonAttempts, 6139 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 76.6s InterpolantComputationTime, 4735 NumberOfCodeBlocks, 4735 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 7384 ConstructedInterpolants, 122 QuantifiedInterpolants, 7975326 SizeOfPredicates, 23 NumberOfNonLiveVariables, 4770 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 29 InterpolantComputations, 9 PerfectInterpolantSequences, 6887/7670 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_label08_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-08-07_13-04-24-869.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem17_label08_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-08-07_13-04-24-869.csv Completed graceful shutdown