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/Problem16_label21_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ddc4263 [2018-08-07 12:54:19,287 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-08-07 12:54:19,290 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-08-07 12:54:19,308 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-08-07 12:54:19,308 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-08-07 12:54:19,310 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-08-07 12:54:19,312 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-08-07 12:54:19,314 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-08-07 12:54:19,316 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-08-07 12:54:19,318 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-08-07 12:54:19,319 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-08-07 12:54:19,320 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-08-07 12:54:19,320 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-08-07 12:54:19,321 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-08-07 12:54:19,323 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-08-07 12:54:19,323 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-08-07 12:54:19,324 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-08-07 12:54:19,326 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-08-07 12:54:19,328 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-08-07 12:54:19,330 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-08-07 12:54:19,331 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-08-07 12:54:19,332 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-08-07 12:54:19,335 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-08-07 12:54:19,335 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-08-07 12:54:19,335 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-08-07 12:54:19,336 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-08-07 12:54:19,338 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-08-07 12:54:19,338 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-08-07 12:54:19,339 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-08-07 12:54:19,340 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-08-07 12:54:19,341 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-08-07 12:54:19,341 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-08-07 12:54:19,342 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-08-07 12:54:19,342 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-08-07 12:54:19,343 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-08-07 12:54:19,344 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-08-07 12:54:19,344 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 12:54:19,369 INFO L110 SettingsManager]: Loading preferences was successful [2018-08-07 12:54:19,369 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-08-07 12:54:19,370 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-08-07 12:54:19,371 INFO L133 SettingsManager]: * User list type=DISABLED [2018-08-07 12:54:19,371 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-08-07 12:54:19,371 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-08-07 12:54:19,371 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-08-07 12:54:19,372 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-08-07 12:54:19,372 INFO L133 SettingsManager]: * Log string format=TERM [2018-08-07 12:54:19,372 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-08-07 12:54:19,372 INFO L133 SettingsManager]: * Interval Domain=false [2018-08-07 12:54:19,373 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-08-07 12:54:19,373 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-08-07 12:54:19,375 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-08-07 12:54:19,375 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-08-07 12:54:19,375 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-08-07 12:54:19,375 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-08-07 12:54:19,375 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-08-07 12:54:19,376 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-08-07 12:54:19,376 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-08-07 12:54:19,376 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-08-07 12:54:19,376 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-08-07 12:54:19,378 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-08-07 12:54:19,378 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 12:54:19,378 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-08-07 12:54:19,378 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-08-07 12:54:19,379 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-08-07 12:54:19,379 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-08-07 12:54:19,379 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-08-07 12:54:19,379 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-08-07 12:54:19,379 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-08-07 12:54:19,380 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-08-07 12:54:19,380 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-08-07 12:54:19,427 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-08-07 12:54:19,440 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-08-07 12:54:19,446 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-08-07 12:54:19,448 INFO L271 PluginConnector]: Initializing CDTParser... [2018-08-07 12:54:19,448 INFO L276 PluginConnector]: CDTParser initialized [2018-08-07 12:54:19,449 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label21_true-unreach-call.c [2018-08-07 12:54:19,835 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e445ccf5e/baa4221f1c2f44eb8bdf16e065dbc05e/FLAG57ba93738 [2018-08-07 12:54:20,187 INFO L276 CDTParser]: Found 1 translation units. [2018-08-07 12:54:20,189 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label21_true-unreach-call.c [2018-08-07 12:54:20,212 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e445ccf5e/baa4221f1c2f44eb8bdf16e065dbc05e/FLAG57ba93738 [2018-08-07 12:54:20,232 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e445ccf5e/baa4221f1c2f44eb8bdf16e065dbc05e [2018-08-07 12:54:20,244 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-08-07 12:54:20,247 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-08-07 12:54:20,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-08-07 12:54:20,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-08-07 12:54:20,260 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-08-07 12:54:20,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 12:54:20" (1/1) ... [2018-08-07 12:54:20,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62fb1261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:20, skipping insertion in model container [2018-08-07 12:54:20,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 12:54:20" (1/1) ... [2018-08-07 12:54:20,533 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-08-07 12:54:21,066 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 12:54:21,083 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-08-07 12:54:21,350 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 12:54:21,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:21 WrapperNode [2018-08-07 12:54:21,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-08-07 12:54:21,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-08-07 12:54:21,449 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-08-07 12:54:21,449 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-08-07 12:54:21,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:21" (1/1) ... [2018-08-07 12:54:21,511 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:21" (1/1) ... [2018-08-07 12:54:21,613 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-08-07 12:54:21,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-08-07 12:54:21,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-08-07 12:54:21,614 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-08-07 12:54:21,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:21" (1/1) ... [2018-08-07 12:54:21,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:21" (1/1) ... [2018-08-07 12:54:21,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:21" (1/1) ... [2018-08-07 12:54:21,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:21" (1/1) ... [2018-08-07 12:54:22,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:21" (1/1) ... [2018-08-07 12:54:22,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:21" (1/1) ... [2018-08-07 12:54:22,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:21" (1/1) ... [2018-08-07 12:54:22,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-08-07 12:54:22,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-08-07 12:54:22,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-08-07 12:54:22,140 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-08-07 12:54:22,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:21" (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 12:54:22,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-08-07 12:54:22,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-08-07 12:54:22,212 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 12:54:22,212 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 12:54:22,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-08-07 12:54:22,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-08-07 12:54:22,213 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-08-07 12:54:22,213 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-08-07 12:54:22,213 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 12:54:22,213 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 12:54:28,651 INFO L273 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-08-07 12:54:28,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 12:54:28 BoogieIcfgContainer [2018-08-07 12:54:28,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-08-07 12:54:28,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-08-07 12:54:28,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-08-07 12:54:28,657 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-08-07 12:54:28,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.08 12:54:20" (1/3) ... [2018-08-07 12:54:28,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@395d75ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 12:54:28, skipping insertion in model container [2018-08-07 12:54:28,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:21" (2/3) ... [2018-08-07 12:54:28,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@395d75ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 12:54:28, skipping insertion in model container [2018-08-07 12:54:28,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 12:54:28" (3/3) ... [2018-08-07 12:54:28,661 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label21_true-unreach-call.c [2018-08-07 12:54:28,671 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-08-07 12:54:28,680 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-08-07 12:54:28,736 INFO L129 ementStrategyFactory]: Using default assertion order modulation [2018-08-07 12:54:28,737 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-08-07 12:54:28,738 INFO L382 AbstractCegarLoop]: Hoare is true [2018-08-07 12:54:28,738 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-08-07 12:54:28,738 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-08-07 12:54:28,738 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-08-07 12:54:28,738 INFO L386 AbstractCegarLoop]: Difference is false [2018-08-07 12:54:28,738 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-08-07 12:54:28,739 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-08-07 12:54:28,771 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-08-07 12:54:28,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-08-07 12:54:28,786 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:54:28,788 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] [2018-08-07 12:54:28,789 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 12:54:28,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1517066601, now seen corresponding path program 1 times [2018-08-07 12:54:28,797 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:54:28,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:28,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:54:28,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:28,842 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:54:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:54:29,155 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 12:54:29,158 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:54:29,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-08-07 12:54:29,160 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:54:29,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-07 12:54:29,182 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-07 12:54:29,182 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:54:29,185 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 4 states. [2018-08-07 12:54:35,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:54:35,560 INFO L93 Difference]: Finished difference Result 1513 states and 2838 transitions. [2018-08-07 12:54:35,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-08-07 12:54:35,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2018-08-07 12:54:35,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:54:35,590 INFO L225 Difference]: With dead ends: 1513 [2018-08-07 12:54:35,591 INFO L226 Difference]: Without dead ends: 1097 [2018-08-07 12:54:35,599 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:54:35,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2018-08-07 12:54:35,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 744. [2018-08-07 12:54:35,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-08-07 12:54:35,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1301 transitions. [2018-08-07 12:54:35,720 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1301 transitions. Word has length 45 [2018-08-07 12:54:35,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:54:35,721 INFO L480 AbstractCegarLoop]: Abstraction has 744 states and 1301 transitions. [2018-08-07 12:54:35,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-08-07 12:54:35,721 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1301 transitions. [2018-08-07 12:54:35,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-08-07 12:54:35,734 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:54:35,734 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:54:35,735 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 12:54:35,735 INFO L82 PathProgramCache]: Analyzing trace with hash -2092302891, now seen corresponding path program 1 times [2018-08-07 12:54:35,735 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:54:35,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:35,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:54:35,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:35,737 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:54:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:54:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:54:36,099 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:54:36,100 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-08-07 12:54:36,100 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:54:36,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:54:36,102 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:54:36,102 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 12:54:36,102 INFO L87 Difference]: Start difference. First operand 744 states and 1301 transitions. Second operand 6 states. [2018-08-07 12:54:40,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:54:40,847 INFO L93 Difference]: Finished difference Result 2196 states and 3924 transitions. [2018-08-07 12:54:40,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 12:54:40,858 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2018-08-07 12:54:40,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:54:40,872 INFO L225 Difference]: With dead ends: 2196 [2018-08-07 12:54:40,872 INFO L226 Difference]: Without dead ends: 1458 [2018-08-07 12:54:40,876 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 12:54:40,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2018-08-07 12:54:40,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1438. [2018-08-07 12:54:40,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1438 states. [2018-08-07 12:54:40,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 2463 transitions. [2018-08-07 12:54:40,962 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 2463 transitions. Word has length 116 [2018-08-07 12:54:40,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:54:40,963 INFO L480 AbstractCegarLoop]: Abstraction has 1438 states and 2463 transitions. [2018-08-07 12:54:40,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:54:40,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 2463 transitions. [2018-08-07 12:54:40,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-08-07 12:54:40,967 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:54:40,967 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:54:40,967 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 12:54:40,968 INFO L82 PathProgramCache]: Analyzing trace with hash 767516542, now seen corresponding path program 1 times [2018-08-07 12:54:40,968 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:54:40,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:40,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:54:40,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:40,972 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:54:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:54:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:54:41,224 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:54:41,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-08-07 12:54:41,224 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:54:41,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:54:41,225 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:54:41,225 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-08-07 12:54:41,225 INFO L87 Difference]: Start difference. First operand 1438 states and 2463 transitions. Second operand 5 states. [2018-08-07 12:54:46,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:54:46,077 INFO L93 Difference]: Finished difference Result 3597 states and 6200 transitions. [2018-08-07 12:54:46,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 12:54:46,078 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2018-08-07 12:54:46,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:54:46,092 INFO L225 Difference]: With dead ends: 3597 [2018-08-07 12:54:46,092 INFO L226 Difference]: Without dead ends: 2165 [2018-08-07 12:54:46,098 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-08-07 12:54:46,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2018-08-07 12:54:46,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 2145. [2018-08-07 12:54:46,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2145 states. [2018-08-07 12:54:46,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 3126 transitions. [2018-08-07 12:54:46,172 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 3126 transitions. Word has length 117 [2018-08-07 12:54:46,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:54:46,173 INFO L480 AbstractCegarLoop]: Abstraction has 2145 states and 3126 transitions. [2018-08-07 12:54:46,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:54:46,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 3126 transitions. [2018-08-07 12:54:46,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-08-07 12:54:46,179 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:54:46,179 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:54:46,179 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 12:54:46,180 INFO L82 PathProgramCache]: Analyzing trace with hash -369023626, now seen corresponding path program 1 times [2018-08-07 12:54:46,180 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:54:46,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:46,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:54:46,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:46,182 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:54:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:54:46,509 WARN L170 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 12:54:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:54:46,629 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:54:46,629 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-08-07 12:54:46,629 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:54:46,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:54:46,630 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:54:46,630 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 12:54:46,630 INFO L87 Difference]: Start difference. First operand 2145 states and 3126 transitions. Second operand 6 states. [2018-08-07 12:54:53,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:54:53,319 INFO L93 Difference]: Finished difference Result 7058 states and 10436 transitions. [2018-08-07 12:54:53,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 12:54:53,319 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 209 [2018-08-07 12:54:53,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:54:53,349 INFO L225 Difference]: With dead ends: 7058 [2018-08-07 12:54:53,349 INFO L226 Difference]: Without dead ends: 4919 [2018-08-07 12:54:53,366 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-08-07 12:54:53,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4919 states. [2018-08-07 12:54:53,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4919 to 4879. [2018-08-07 12:54:53,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4879 states. [2018-08-07 12:54:53,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4879 states to 4879 states and 6857 transitions. [2018-08-07 12:54:53,500 INFO L78 Accepts]: Start accepts. Automaton has 4879 states and 6857 transitions. Word has length 209 [2018-08-07 12:54:53,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:54:53,500 INFO L480 AbstractCegarLoop]: Abstraction has 4879 states and 6857 transitions. [2018-08-07 12:54:53,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:54:53,501 INFO L276 IsEmpty]: Start isEmpty. Operand 4879 states and 6857 transitions. [2018-08-07 12:54:53,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-08-07 12:54:53,505 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:54:53,505 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:54:53,505 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 12:54:53,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1931248990, now seen corresponding path program 1 times [2018-08-07 12:54:53,506 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:54:53,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:53,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:54:53,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:53,507 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:54:53,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:54:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:54:53,954 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:54:53,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-08-07 12:54:53,954 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:54:53,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:54:53,955 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:54:53,955 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 12:54:53,956 INFO L87 Difference]: Start difference. First operand 4879 states and 6857 transitions. Second operand 6 states. [2018-08-07 12:54:58,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:54:58,476 INFO L93 Difference]: Finished difference Result 12216 states and 17406 transitions. [2018-08-07 12:54:58,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 12:54:58,476 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 229 [2018-08-07 12:54:58,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:54:58,514 INFO L225 Difference]: With dead ends: 12216 [2018-08-07 12:54:58,514 INFO L226 Difference]: Without dead ends: 7343 [2018-08-07 12:54:58,544 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-08-07 12:54:58,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7343 states. [2018-08-07 12:54:58,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7343 to 7306. [2018-08-07 12:54:58,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7306 states. [2018-08-07 12:54:58,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7306 states to 7306 states and 9825 transitions. [2018-08-07 12:54:58,726 INFO L78 Accepts]: Start accepts. Automaton has 7306 states and 9825 transitions. Word has length 229 [2018-08-07 12:54:58,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:54:58,727 INFO L480 AbstractCegarLoop]: Abstraction has 7306 states and 9825 transitions. [2018-08-07 12:54:58,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:54:58,727 INFO L276 IsEmpty]: Start isEmpty. Operand 7306 states and 9825 transitions. [2018-08-07 12:54:58,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-08-07 12:54:58,731 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:54:58,732 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-08-07 12:54:58,732 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 12:54:58,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1802925492, now seen corresponding path program 1 times [2018-08-07 12:54:58,732 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:54:58,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:58,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:54:58,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:58,733 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:54:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:54:58,968 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-08-07 12:54:58,968 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:54:58,969 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-08-07 12:54:58,969 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:54:58,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-07 12:54:58,970 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-07 12:54:58,970 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:54:58,970 INFO L87 Difference]: Start difference. First operand 7306 states and 9825 transitions. Second operand 4 states. [2018-08-07 12:55:03,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:55:03,108 INFO L93 Difference]: Finished difference Result 18701 states and 25596 transitions. [2018-08-07 12:55:03,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-08-07 12:55:03,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 246 [2018-08-07 12:55:03,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:55:03,163 INFO L225 Difference]: With dead ends: 18701 [2018-08-07 12:55:03,163 INFO L226 Difference]: Without dead ends: 11401 [2018-08-07 12:55:03,197 INFO L603 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 [2018-08-07 12:55:03,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11401 states. [2018-08-07 12:55:03,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11401 to 11401. [2018-08-07 12:55:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11401 states. [2018-08-07 12:55:03,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11401 states to 11401 states and 14531 transitions. [2018-08-07 12:55:03,464 INFO L78 Accepts]: Start accepts. Automaton has 11401 states and 14531 transitions. Word has length 246 [2018-08-07 12:55:03,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:55:03,465 INFO L480 AbstractCegarLoop]: Abstraction has 11401 states and 14531 transitions. [2018-08-07 12:55:03,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-08-07 12:55:03,465 INFO L276 IsEmpty]: Start isEmpty. Operand 11401 states and 14531 transitions. [2018-08-07 12:55:03,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-08-07 12:55:03,474 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:55:03,475 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:03,475 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 12:55:03,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1558860254, now seen corresponding path program 1 times [2018-08-07 12:55:03,475 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:55:03,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:55:03,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:03,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:55:03,477 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:55:03,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:03,815 WARN L170 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 12:55:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-08-07 12:55:03,929 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:55:03,929 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 12:55:03,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:03,939 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:55:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:04,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:55:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:55:04,217 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:55:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:55:04,484 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-08-07 12:55:04,485 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2018-08-07 12:55:04,485 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:55:04,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 12:55:04,486 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 12:55:04,486 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 12:55:04,487 INFO L87 Difference]: Start difference. First operand 11401 states and 14531 transitions. Second operand 3 states. [2018-08-07 12:55:08,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:55:08,109 INFO L93 Difference]: Finished difference Result 25838 states and 32823 transitions. [2018-08-07 12:55:08,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 12:55:08,110 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 293 [2018-08-07 12:55:08,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:55:08,185 INFO L225 Difference]: With dead ends: 25838 [2018-08-07 12:55:08,185 INFO L226 Difference]: Without dead ends: 14443 [2018-08-07 12:55:08,229 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 585 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 12:55:08,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14443 states. [2018-08-07 12:55:08,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14443 to 14443. [2018-08-07 12:55:08,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14443 states. [2018-08-07 12:55:08,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14443 states to 14443 states and 17704 transitions. [2018-08-07 12:55:08,583 INFO L78 Accepts]: Start accepts. Automaton has 14443 states and 17704 transitions. Word has length 293 [2018-08-07 12:55:08,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:55:08,585 INFO L480 AbstractCegarLoop]: Abstraction has 14443 states and 17704 transitions. [2018-08-07 12:55:08,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 12:55:08,585 INFO L276 IsEmpty]: Start isEmpty. Operand 14443 states and 17704 transitions. [2018-08-07 12:55:08,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2018-08-07 12:55:08,601 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:55:08,602 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 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 12:55:08,602 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 12:55:08,602 INFO L82 PathProgramCache]: Analyzing trace with hash 946170763, now seen corresponding path program 1 times [2018-08-07 12:55:08,602 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:55:08,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:55:08,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:08,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:55:08,604 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:55:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 233 proven. 92 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-08-07 12:55:09,528 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:55:09,529 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 12:55:09,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:09,540 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:55:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:09,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:55:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 375 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-08-07 12:55:10,185 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:55:10,387 WARN L170 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-08-07 12:55:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 233 proven. 92 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-08-07 12:55:11,362 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:55:11,362 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 12:55:11,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:11,391 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:55:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:11,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:55:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 375 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-08-07 12:55:11,970 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:55:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 233 proven. 92 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-08-07 12:55:12,833 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:55:12,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-08-07 12:55:12,833 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:55:12,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 12:55:12,835 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 12:55:12,835 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-08-07 12:55:12,835 INFO L87 Difference]: Start difference. First operand 14443 states and 17704 transitions. Second operand 9 states. [2018-08-07 12:55:20,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:55:20,379 INFO L93 Difference]: Finished difference Result 30263 states and 38380 transitions. [2018-08-07 12:55:20,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-08-07 12:55:20,380 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 384 [2018-08-07 12:55:20,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:55:20,447 INFO L225 Difference]: With dead ends: 30263 [2018-08-07 12:55:20,447 INFO L226 Difference]: Without dead ends: 15826 [2018-08-07 12:55:20,487 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1556 GetRequests, 1534 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2018-08-07 12:55:20,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15826 states. [2018-08-07 12:55:20,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15826 to 15731. [2018-08-07 12:55:20,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15731 states. [2018-08-07 12:55:20,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15731 states to 15731 states and 19238 transitions. [2018-08-07 12:55:20,871 INFO L78 Accepts]: Start accepts. Automaton has 15731 states and 19238 transitions. Word has length 384 [2018-08-07 12:55:20,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:55:20,871 INFO L480 AbstractCegarLoop]: Abstraction has 15731 states and 19238 transitions. [2018-08-07 12:55:20,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 12:55:20,872 INFO L276 IsEmpty]: Start isEmpty. Operand 15731 states and 19238 transitions. [2018-08-07 12:55:20,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2018-08-07 12:55:20,889 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:55:20,890 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-08-07 12:55:20,890 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 12:55:20,890 INFO L82 PathProgramCache]: Analyzing trace with hash -628686525, now seen corresponding path program 1 times [2018-08-07 12:55:20,890 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:55:20,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:55:20,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:20,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:55:20,892 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:55:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-08-07 12:55:21,345 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:55:21,345 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-08-07 12:55:21,345 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:55:21,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-07 12:55:21,346 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-07 12:55:21,347 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:55:21,347 INFO L87 Difference]: Start difference. First operand 15731 states and 19238 transitions. Second operand 4 states. [2018-08-07 12:55:26,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:55:26,770 INFO L93 Difference]: Finished difference Result 46325 states and 58492 transitions. [2018-08-07 12:55:26,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-08-07 12:55:26,771 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 469 [2018-08-07 12:55:26,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:55:26,854 INFO L225 Difference]: With dead ends: 46325 [2018-08-07 12:55:26,855 INFO L226 Difference]: Without dead ends: 25081 [2018-08-07 12:55:26,993 INFO L603 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 [2018-08-07 12:55:27,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25081 states. [2018-08-07 12:55:27,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25081 to 24734. [2018-08-07 12:55:27,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24734 states. [2018-08-07 12:55:27,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24734 states to 24734 states and 27386 transitions. [2018-08-07 12:55:27,456 INFO L78 Accepts]: Start accepts. Automaton has 24734 states and 27386 transitions. Word has length 469 [2018-08-07 12:55:27,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:55:27,457 INFO L480 AbstractCegarLoop]: Abstraction has 24734 states and 27386 transitions. [2018-08-07 12:55:27,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-08-07 12:55:27,457 INFO L276 IsEmpty]: Start isEmpty. Operand 24734 states and 27386 transitions. [2018-08-07 12:55:27,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1101 [2018-08-07 12:55:27,556 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:55:27,557 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-08-07 12:55:27,557 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 12:55:27,558 INFO L82 PathProgramCache]: Analyzing trace with hash 458930906, now seen corresponding path program 1 times [2018-08-07 12:55:27,558 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:55:27,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:55:27,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:27,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:55:27,559 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:55:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:28,437 WARN L170 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-08-07 12:55:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 609 proven. 273 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2018-08-07 12:55:32,036 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:55:32,037 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 12:55:32,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:32,046 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:55:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:32,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:55:33,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 731 proven. 0 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2018-08-07 12:55:33,773 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:55:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 152 proven. 681 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2018-08-07 12:55:36,209 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 12:55:36,210 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [12, 6] total 18 [2018-08-07 12:55:36,210 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:55:36,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:55:36,211 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:55:36,211 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-08-07 12:55:36,211 INFO L87 Difference]: Start difference. First operand 24734 states and 27386 transitions. Second operand 6 states. [2018-08-07 12:55:40,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:55:40,440 INFO L93 Difference]: Finished difference Result 53776 states and 59290 transitions. [2018-08-07 12:55:40,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-08-07 12:55:40,440 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1100 [2018-08-07 12:55:40,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:55:40,534 INFO L225 Difference]: With dead ends: 53776 [2018-08-07 12:55:40,534 INFO L226 Difference]: Without dead ends: 29048 [2018-08-07 12:55:40,609 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 2215 GetRequests, 2194 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2018-08-07 12:55:40,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29048 states. [2018-08-07 12:55:41,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29048 to 28956. [2018-08-07 12:55:41,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28956 states. [2018-08-07 12:55:41,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28956 states to 28956 states and 31745 transitions. [2018-08-07 12:55:41,140 INFO L78 Accepts]: Start accepts. Automaton has 28956 states and 31745 transitions. Word has length 1100 [2018-08-07 12:55:41,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:55:41,141 INFO L480 AbstractCegarLoop]: Abstraction has 28956 states and 31745 transitions. [2018-08-07 12:55:41,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:55:41,141 INFO L276 IsEmpty]: Start isEmpty. Operand 28956 states and 31745 transitions. [2018-08-07 12:55:41,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1319 [2018-08-07 12:55:41,216 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:55:41,217 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:41,217 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:55:41,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1162410849, now seen corresponding path program 1 times [2018-08-07 12:55:41,218 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:55:41,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:55:41,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:41,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:55:41,219 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:55:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2404 backedges. 206 proven. 1505 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2018-08-07 12:55:42,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:55:42,840 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 12:55:42,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:42,848 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:55:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:43,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:55:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2404 backedges. 1619 proven. 2 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2018-08-07 12:55:44,225 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:55:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2404 backedges. 423 proven. 629 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2018-08-07 12:55:45,377 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:55:45,377 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 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:55:45,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:45,392 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:55:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:46,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:55:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2404 backedges. 1402 proven. 2 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2018-08-07 12:55:47,245 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:55:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2404 backedges. 208 proven. 1298 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2018-08-07 12:55:48,664 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:55:48,666 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-08-07 12:55:48,666 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:55:48,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 12:55:48,671 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 12:55:48,671 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-08-07 12:55:48,672 INFO L87 Difference]: Start difference. First operand 28956 states and 31745 transitions. Second operand 9 states. [2018-08-07 12:55:54,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:55:54,803 INFO L93 Difference]: Finished difference Result 57603 states and 63290 transitions. [2018-08-07 12:55:54,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-08-07 12:55:54,804 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1318 [2018-08-07 12:55:54,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:55:54,883 INFO L225 Difference]: With dead ends: 57603 [2018-08-07 12:55:54,883 INFO L226 Difference]: Without dead ends: 28991 [2018-08-07 12:55:54,970 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 5301 GetRequests, 5271 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2018-08-07 12:55:54,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28991 states. [2018-08-07 12:55:55,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28991 to 27950. [2018-08-07 12:55:55,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27950 states. [2018-08-07 12:55:55,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27950 states to 27950 states and 30146 transitions. [2018-08-07 12:55:55,446 INFO L78 Accepts]: Start accepts. Automaton has 27950 states and 30146 transitions. Word has length 1318 [2018-08-07 12:55:55,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:55:55,447 INFO L480 AbstractCegarLoop]: Abstraction has 27950 states and 30146 transitions. [2018-08-07 12:55:55,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 12:55:55,447 INFO L276 IsEmpty]: Start isEmpty. Operand 27950 states and 30146 transitions. [2018-08-07 12:55:55,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1341 [2018-08-07 12:55:55,489 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:55:55,490 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:55,491 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:55:55,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1363337045, now seen corresponding path program 1 times [2018-08-07 12:55:55,491 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:55:55,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:55:55,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:55,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:55:55,494 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:55:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:56,841 WARN L170 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-08-07 12:55:59,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 223 proven. 1564 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2018-08-07 12:55:59,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:55:59,278 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 12:55:59,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:59,285 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:55:59,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:59,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:56:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 1446 proven. 2 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2018-08-07 12:56:01,317 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:56:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 208 proven. 1342 refuted. 0 times theorem prover too weak. 918 trivial. 0 not checked. [2018-08-07 12:56:04,440 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:56:04,441 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 12:56:04,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:56:04,458 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:56:05,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:56:05,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:56:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 1683 proven. 2 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2018-08-07 12:56:06,821 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:56:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 443 proven. 689 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2018-08-07 12:56:10,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:56:10,235 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 8, 5] total 24 [2018-08-07 12:56:10,236 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:56:10,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-08-07 12:56:10,238 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-08-07 12:56:10,238 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2018-08-07 12:56:10,238 INFO L87 Difference]: Start difference. First operand 27950 states and 30146 transitions. Second operand 16 states. [2018-08-07 12:56:22,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:56:22,021 INFO L93 Difference]: Finished difference Result 70505 states and 76822 transitions. [2018-08-07 12:56:22,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-08-07 12:56:22,022 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 1340 [2018-08-07 12:56:22,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:56:22,139 INFO L225 Difference]: With dead ends: 70505 [2018-08-07 12:56:22,139 INFO L226 Difference]: Without dead ends: 42899 [2018-08-07 12:56:22,215 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 5447 GetRequests, 5375 SyntacticMatches, 15 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=684, Invalid=2738, Unknown=0, NotChecked=0, Total=3422 [2018-08-07 12:56:22,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42899 states. [2018-08-07 12:56:22,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42899 to 42397. [2018-08-07 12:56:22,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42397 states. [2018-08-07 12:56:22,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42397 states to 42397 states and 45822 transitions. [2018-08-07 12:56:22,848 INFO L78 Accepts]: Start accepts. Automaton has 42397 states and 45822 transitions. Word has length 1340 [2018-08-07 12:56:22,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:56:22,849 INFO L480 AbstractCegarLoop]: Abstraction has 42397 states and 45822 transitions. [2018-08-07 12:56:22,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-08-07 12:56:22,849 INFO L276 IsEmpty]: Start isEmpty. Operand 42397 states and 45822 transitions. [2018-08-07 12:56:22,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1349 [2018-08-07 12:56:22,902 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:56:22,903 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:56:22,904 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:56:22,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1352289339, now seen corresponding path program 1 times [2018-08-07 12:56:22,904 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:56:22,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:56:22,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:56:22,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:56:22,905 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:56:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:56:23,726 WARN L170 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-08-07 12:56:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 903 proven. 273 refuted. 0 times theorem prover too weak. 1316 trivial. 0 not checked. [2018-08-07 12:56:28,100 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:56:28,100 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 12:56:28,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:56:28,108 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:56:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:56:28,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:56:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 1703 proven. 6 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2018-08-07 12:56:29,834 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:56:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 206 proven. 1605 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2018-08-07 12:56:34,138 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:56:34,138 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 12:56:34,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:56:34,154 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:56:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:56:35,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:56:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 1462 proven. 6 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2018-08-07 12:56:37,297 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:56:44,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 208 proven. 1603 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2018-08-07 12:56:44,516 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:56:44,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8, 7, 8] total 33 [2018-08-07 12:56:44,518 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:56:44,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-08-07 12:56:44,519 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-08-07 12:56:44,520 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2018-08-07 12:56:44,520 INFO L87 Difference]: Start difference. First operand 42397 states and 45822 transitions. Second operand 18 states. [2018-08-07 12:56:50,091 WARN L170 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2018-08-07 12:56:50,626 WARN L170 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2018-08-07 12:56:58,482 WARN L170 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2018-08-07 12:57:02,213 WARN L170 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2018-08-07 12:57:03,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:57:03,231 INFO L93 Difference]: Finished difference Result 86314 states and 93401 transitions. [2018-08-07 12:57:03,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-08-07 12:57:03,231 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1348 [2018-08-07 12:57:03,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:57:03,338 INFO L225 Difference]: With dead ends: 86314 [2018-08-07 12:57:03,338 INFO L226 Difference]: Without dead ends: 44601 [2018-08-07 12:57:03,435 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 5464 GetRequests, 5394 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=848, Invalid=3844, Unknown=0, NotChecked=0, Total=4692 [2018-08-07 12:57:03,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44601 states. [2018-08-07 12:57:03,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44601 to 44092. [2018-08-07 12:57:03,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44092 states. [2018-08-07 12:57:04,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44092 states to 44092 states and 47539 transitions. [2018-08-07 12:57:04,091 INFO L78 Accepts]: Start accepts. Automaton has 44092 states and 47539 transitions. Word has length 1348 [2018-08-07 12:57:04,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:57:04,092 INFO L480 AbstractCegarLoop]: Abstraction has 44092 states and 47539 transitions. [2018-08-07 12:57:04,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-08-07 12:57:04,092 INFO L276 IsEmpty]: Start isEmpty. Operand 44092 states and 47539 transitions. [2018-08-07 12:57:04,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1523 [2018-08-07 12:57:04,149 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:57:04,150 INFO L376 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-08-07 12:57:04,150 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:57:04,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1997718480, now seen corresponding path program 1 times [2018-08-07 12:57:04,151 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:57:04,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:57:04,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:57:04,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:57:04,152 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:57:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:57:06,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3963 backedges. 789 proven. 336 refuted. 0 times theorem prover too weak. 2838 trivial. 0 not checked. [2018-08-07 12:57:06,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:57:06,021 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 12:57:06,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:57:06,028 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:57:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:57:06,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:57:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3963 backedges. 2686 proven. 2 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2018-08-07 12:57:07,505 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:57:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3963 backedges. 789 proven. 336 refuted. 0 times theorem prover too weak. 2838 trivial. 0 not checked. [2018-08-07 12:57:08,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:57:08,743 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 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:57:08,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:57:08,759 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:57:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:57:09,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:57:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3963 backedges. 2686 proven. 2 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2018-08-07 12:57:10,597 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:57:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3963 backedges. 789 proven. 336 refuted. 0 times theorem prover too weak. 2838 trivial. 0 not checked. [2018-08-07 12:57:11,811 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:57:11,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-08-07 12:57:11,813 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:57:11,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 12:57:11,815 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 12:57:11,815 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-08-07 12:57:11,815 INFO L87 Difference]: Start difference. First operand 44092 states and 47539 transitions. Second operand 9 states. [2018-08-07 12:57:17,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:57:17,605 INFO L93 Difference]: Finished difference Result 83084 states and 88796 transitions. [2018-08-07 12:57:17,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-08-07 12:57:17,606 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1522 [2018-08-07 12:57:17,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:57:17,672 INFO L225 Difference]: With dead ends: 83084 [2018-08-07 12:57:17,672 INFO L226 Difference]: Without dead ends: 41368 [2018-08-07 12:57:17,746 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 6104 GetRequests, 6084 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2018-08-07 12:57:17,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41368 states. [2018-08-07 12:57:18,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41368 to 38867. [2018-08-07 12:57:18,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38867 states. [2018-08-07 12:57:18,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38867 states to 38867 states and 40607 transitions. [2018-08-07 12:57:18,180 INFO L78 Accepts]: Start accepts. Automaton has 38867 states and 40607 transitions. Word has length 1522 [2018-08-07 12:57:18,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:57:18,180 INFO L480 AbstractCegarLoop]: Abstraction has 38867 states and 40607 transitions. [2018-08-07 12:57:18,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 12:57:18,181 INFO L276 IsEmpty]: Start isEmpty. Operand 38867 states and 40607 transitions. [2018-08-07 12:57:18,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1524 [2018-08-07 12:57:18,215 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:57:18,216 INFO L376 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-08-07 12:57:18,216 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:57:18,216 INFO L82 PathProgramCache]: Analyzing trace with hash -324807205, now seen corresponding path program 1 times [2018-08-07 12:57:18,216 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:57:18,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:57:18,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:57:18,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:57:18,217 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:57:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:57:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3970 backedges. 1424 proven. 41 refuted. 0 times theorem prover too weak. 2505 trivial. 0 not checked. [2018-08-07 12:57:21,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:57:21,056 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 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 [2018-08-07 12:57:21,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:57:21,068 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:57:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:57:21,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:57:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3970 backedges. 1463 proven. 2 refuted. 0 times theorem prover too weak. 2505 trivial. 0 not checked. [2018-08-07 12:57:23,052 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:57:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3970 backedges. 1463 proven. 2 refuted. 0 times theorem prover too weak. 2505 trivial. 0 not checked. [2018-08-07 12:57:27,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:57:27,038 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 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 [2018-08-07 12:57:27,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:57:27,055 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:57:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:57:28,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:57:29,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3970 backedges. 2690 proven. 2 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2018-08-07 12:57:29,431 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:57:29,633 WARN L170 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-08-07 12:57:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3970 backedges. 790 proven. 336 refuted. 0 times theorem prover too weak. 2844 trivial. 0 not checked. [2018-08-07 12:57:31,124 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:57:31,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 6, 5, 5] total 22 [2018-08-07 12:57:31,125 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:57:31,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-08-07 12:57:31,127 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-08-07 12:57:31,127 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2018-08-07 12:57:31,127 INFO L87 Difference]: Start difference. First operand 38867 states and 40607 transitions. Second operand 14 states. [2018-08-07 12:57:55,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:57:55,772 INFO L93 Difference]: Finished difference Result 83511 states and 87536 transitions. [2018-08-07 12:57:55,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-08-07 12:57:55,774 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1523 [2018-08-07 12:57:55,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:57:55,775 INFO L225 Difference]: With dead ends: 83511 [2018-08-07 12:57:55,775 INFO L226 Difference]: Without dead ends: 0 [2018-08-07 12:57:55,851 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 6186 GetRequests, 6120 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=629, Invalid=3403, Unknown=0, NotChecked=0, Total=4032 [2018-08-07 12:57:55,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-08-07 12:57:55,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-08-07 12:57:55,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-08-07 12:57:55,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-08-07 12:57:55,852 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1523 [2018-08-07 12:57:55,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:57:55,853 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-08-07 12:57:55,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-08-07 12:57:55,853 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-08-07 12:57:55,853 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-08-07 12:57:55,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-08-07 12:57:55,976 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:57:57,087 WARN L170 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 432 DAG size of output: 390 [2018-08-07 12:57:58,401 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:57:58,825 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:57:58,915 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:57:59,330 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:58:00,310 WARN L170 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 432 DAG size of output: 390 [2018-08-07 12:58:00,340 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:58:00,365 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:58:00,500 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:58:00,501 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:58:00,503 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:58:00,539 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:58:00,542 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:58:00,648 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:58:00,651 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:58:00,703 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:58:00,860 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:58:00,870 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:58:00,871 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:58:00,872 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:58:00,943 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:58:01,095 WARN L170 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2018-08-07 12:58:04,609 WARN L170 SmtUtils]: Spent 3.51 s on a formula simplification. DAG size of input: 388 DAG size of output: 71 [2018-08-07 12:58:11,770 WARN L170 SmtUtils]: Spent 7.06 s on a formula simplification. DAG size of input: 494 DAG size of output: 110 Received shutdown request... [2018-08-07 12:58:13,652 WARN L178 SmtUtils]: Removed 126 from assertion stack [2018-08-07 12:58:13,652 INFO L256 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2018-08-07 12:58:13,655 INFO L168 Benchmark]: Toolchain (without parser) took 233408.97 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 3.6 GB in the end (delta: -2.1 GB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-08-07 12:58:13,656 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-08-07 12:58:13,657 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1200.39 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-08-07 12:58:13,657 INFO L168 Benchmark]: Boogie Procedure Inliner took 164.93 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 32.0 MB). Peak memory consumption was 32.0 MB. Max. memory is 7.1 GB. [2018-08-07 12:58:13,658 INFO L168 Benchmark]: Boogie Preprocessor took 525.41 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 852.5 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 61.4 MB. Max. memory is 7.1 GB. [2018-08-07 12:58:13,660 INFO L168 Benchmark]: RCFGBuilder took 6513.05 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 282.3 MB). Peak memory consumption was 282.3 MB. Max. memory is 7.1 GB. [2018-08-07 12:58:13,661 INFO L168 Benchmark]: TraceAbstraction took 224998.96 ms. Allocated memory was 2.4 GB in the beginning and 4.1 GB in the end (delta: 1.7 GB). Free memory was 2.0 GB in the beginning and 3.6 GB in the end (delta: -1.6 GB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-08-07 12:58:13,668 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1200.39 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 164.93 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 32.0 MB). Peak memory consumption was 32.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 525.41 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 852.5 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 61.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 6513.05 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 282.3 MB). Peak memory consumption was 282.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 224998.96 ms. Allocated memory was 2.4 GB in the beginning and 4.1 GB in the end (delta: 1.7 GB). Free memory was 2.0 GB in the beginning and 3.6 GB in the end (delta: -1.6 GB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 121]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - TimeoutResult: Timeout (de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction) Toolchain cancelled while SimplifyDDAWithTimeout was simplifying term of DAG size 388. RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem16_label21_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-08-07_12-58-13-682.csv Completed graceful shutdown