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/Problem12_label22_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ddc4263 [2018-08-07 12:20:41,613 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-08-07 12:20:41,615 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-08-07 12:20:41,629 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-08-07 12:20:41,629 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-08-07 12:20:41,630 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-08-07 12:20:41,631 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-08-07 12:20:41,633 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-08-07 12:20:41,638 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-08-07 12:20:41,639 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-08-07 12:20:41,643 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-08-07 12:20:41,643 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-08-07 12:20:41,644 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-08-07 12:20:41,645 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-08-07 12:20:41,646 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-08-07 12:20:41,647 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-08-07 12:20:41,648 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-08-07 12:20:41,649 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-08-07 12:20:41,651 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-08-07 12:20:41,653 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-08-07 12:20:41,654 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-08-07 12:20:41,655 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-08-07 12:20:41,657 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-08-07 12:20:41,657 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-08-07 12:20:41,657 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-08-07 12:20:41,658 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-08-07 12:20:41,659 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-08-07 12:20:41,660 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-08-07 12:20:41,660 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-08-07 12:20:41,661 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-08-07 12:20:41,662 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-08-07 12:20:41,662 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-08-07 12:20:41,663 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-08-07 12:20:41,663 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-08-07 12:20:41,664 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-08-07 12:20:41,667 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-08-07 12:20:41,667 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 12:20:41,688 INFO L110 SettingsManager]: Loading preferences was successful [2018-08-07 12:20:41,688 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-08-07 12:20:41,689 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-08-07 12:20:41,689 INFO L133 SettingsManager]: * User list type=DISABLED [2018-08-07 12:20:41,689 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-08-07 12:20:41,690 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-08-07 12:20:41,690 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-08-07 12:20:41,690 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-08-07 12:20:41,690 INFO L133 SettingsManager]: * Log string format=TERM [2018-08-07 12:20:41,693 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-08-07 12:20:41,694 INFO L133 SettingsManager]: * Interval Domain=false [2018-08-07 12:20:41,695 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-08-07 12:20:41,695 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-08-07 12:20:41,695 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-08-07 12:20:41,695 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-08-07 12:20:41,695 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-08-07 12:20:41,698 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-08-07 12:20:41,698 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-08-07 12:20:41,699 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-08-07 12:20:41,699 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-08-07 12:20:41,699 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-08-07 12:20:41,699 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-08-07 12:20:41,699 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-08-07 12:20:41,700 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 12:20:41,700 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-08-07 12:20:41,700 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-08-07 12:20:41,700 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-08-07 12:20:41,701 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-08-07 12:20:41,701 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-08-07 12:20:41,701 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-08-07 12:20:41,702 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-08-07 12:20:41,702 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-08-07 12:20:41,702 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-08-07 12:20:41,763 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-08-07 12:20:41,780 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-08-07 12:20:41,785 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-08-07 12:20:41,787 INFO L271 PluginConnector]: Initializing CDTParser... [2018-08-07 12:20:41,787 INFO L276 PluginConnector]: CDTParser initialized [2018-08-07 12:20:41,788 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label22_true-unreach-call.c [2018-08-07 12:20:42,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/babc0faa0/44aa0c15f1d340f8b790789ab905f1eb/FLAG9d8444835 [2018-08-07 12:20:42,681 INFO L276 CDTParser]: Found 1 translation units. [2018-08-07 12:20:42,681 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label22_true-unreach-call.c [2018-08-07 12:20:42,720 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/babc0faa0/44aa0c15f1d340f8b790789ab905f1eb/FLAG9d8444835 [2018-08-07 12:20:42,743 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/babc0faa0/44aa0c15f1d340f8b790789ab905f1eb [2018-08-07 12:20:42,757 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-08-07 12:20:42,759 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-08-07 12:20:42,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-08-07 12:20:42,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-08-07 12:20:42,767 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-08-07 12:20:42,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 12:20:42" (1/1) ... [2018-08-07 12:20:42,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@be50527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:20:42, skipping insertion in model container [2018-08-07 12:20:42,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 12:20:42" (1/1) ... [2018-08-07 12:20:43,138 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-08-07 12:20:44,254 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 12:20:44,273 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-08-07 12:20:44,921 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 12:20:45,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:20:45 WrapperNode [2018-08-07 12:20:45,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-08-07 12:20:45,166 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-08-07 12:20:45,166 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-08-07 12:20:45,166 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-08-07 12:20:45,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:20:45" (1/1) ... [2018-08-07 12:20:45,273 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:20:45" (1/1) ... [2018-08-07 12:20:45,399 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-08-07 12:20:45,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-08-07 12:20:45,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-08-07 12:20:45,400 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-08-07 12:20:46,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:20:45" (1/1) ... [2018-08-07 12:20:46,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:20:45" (1/1) ... [2018-08-07 12:20:46,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:20:45" (1/1) ... [2018-08-07 12:20:46,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:20:45" (1/1) ... [2018-08-07 12:20:46,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:20:45" (1/1) ... [2018-08-07 12:20:46,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:20:45" (1/1) ... [2018-08-07 12:20:46,332 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:20:45" (1/1) ... [2018-08-07 12:20:46,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-08-07 12:20:46,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-08-07 12:20:46,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-08-07 12:20:46,435 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-08-07 12:20:46,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:20:45" (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 12:20:46,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-08-07 12:20:46,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-08-07 12:20:46,510 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 12:20:46,510 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 12:20:46,510 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_output3 [2018-08-07 12:20:46,510 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_output3 [2018-08-07 12:20:46,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-08-07 12:20:46,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-08-07 12:20:46,511 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_output4 [2018-08-07 12:20:46,511 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_output4 [2018-08-07 12:20:46,511 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-08-07 12:20:46,511 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-08-07 12:20:46,512 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 12:20:46,512 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 12:20:58,781 INFO L273 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-08-07 12:20:58,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 12:20:58 BoogieIcfgContainer [2018-08-07 12:20:58,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-08-07 12:20:58,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-08-07 12:20:58,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-08-07 12:20:58,787 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-08-07 12:20:58,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.08 12:20:42" (1/3) ... [2018-08-07 12:20:58,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2151365e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 12:20:58, skipping insertion in model container [2018-08-07 12:20:58,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:20:45" (2/3) ... [2018-08-07 12:20:58,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2151365e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 12:20:58, skipping insertion in model container [2018-08-07 12:20:58,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 12:20:58" (3/3) ... [2018-08-07 12:20:58,791 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label22_true-unreach-call.c [2018-08-07 12:20:58,801 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-08-07 12:20:58,811 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-08-07 12:20:59,026 INFO L129 ementStrategyFactory]: Using default assertion order modulation [2018-08-07 12:20:59,027 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-08-07 12:20:59,027 INFO L382 AbstractCegarLoop]: Hoare is true [2018-08-07 12:20:59,027 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-08-07 12:20:59,028 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-08-07 12:20:59,028 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-08-07 12:20:59,028 INFO L386 AbstractCegarLoop]: Difference is false [2018-08-07 12:20:59,028 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-08-07 12:20:59,028 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-08-07 12:20:59,098 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states. [2018-08-07 12:20:59,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-08-07 12:20:59,108 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:20:59,109 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:20:59,111 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 12:20:59,115 INFO L82 PathProgramCache]: Analyzing trace with hash -743081679, now seen corresponding path program 1 times [2018-08-07 12:20:59,117 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:20:59,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:20:59,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:20:59,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:20:59,169 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:20:59,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:20:59,650 WARN L170 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 12:20:59,781 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 12:20:59,783 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:20:59,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-08-07 12:20:59,784 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:20:59,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 12:20:59,805 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 12:20:59,806 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 12:20:59,809 INFO L87 Difference]: Start difference. First operand 840 states. Second operand 3 states. [2018-08-07 12:21:09,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:21:09,555 INFO L93 Difference]: Finished difference Result 2446 states and 4700 transitions. [2018-08-07 12:21:09,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 12:21:09,557 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2018-08-07 12:21:09,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:21:09,594 INFO L225 Difference]: With dead ends: 2446 [2018-08-07 12:21:09,594 INFO L226 Difference]: Without dead ends: 1604 [2018-08-07 12:21:09,606 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 12:21:09,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2018-08-07 12:21:09,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1604. [2018-08-07 12:21:09,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1604 states. [2018-08-07 12:21:09,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2909 transitions. [2018-08-07 12:21:09,811 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2909 transitions. Word has length 71 [2018-08-07 12:21:09,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:21:09,812 INFO L480 AbstractCegarLoop]: Abstraction has 1604 states and 2909 transitions. [2018-08-07 12:21:09,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 12:21:09,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2909 transitions. [2018-08-07 12:21:09,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-08-07 12:21:09,830 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:21:09,830 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-08-07 12:21:09,832 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 12:21:09,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1698738186, now seen corresponding path program 1 times [2018-08-07 12:21:09,832 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:21:09,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:21:09,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:21:09,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:21:09,834 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:21:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:21:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:21:10,193 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:21:10,193 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-08-07 12:21:10,193 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:21:10,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:21:10,196 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:21:10,196 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 12:21:10,196 INFO L87 Difference]: Start difference. First operand 1604 states and 2909 transitions. Second operand 6 states. [2018-08-07 12:21:27,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:21:27,853 INFO L93 Difference]: Finished difference Result 4796 states and 8582 transitions. [2018-08-07 12:21:27,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-08-07 12:21:27,854 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2018-08-07 12:21:27,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:21:27,876 INFO L225 Difference]: With dead ends: 4796 [2018-08-07 12:21:27,877 INFO L226 Difference]: Without dead ends: 3198 [2018-08-07 12:21:27,883 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 12:21:27,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2018-08-07 12:21:27,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 3170. [2018-08-07 12:21:27,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3170 states. [2018-08-07 12:21:27,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3170 states to 3170 states and 4856 transitions. [2018-08-07 12:21:27,993 INFO L78 Accepts]: Start accepts. Automaton has 3170 states and 4856 transitions. Word has length 145 [2018-08-07 12:21:27,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:21:27,993 INFO L480 AbstractCegarLoop]: Abstraction has 3170 states and 4856 transitions. [2018-08-07 12:21:27,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:21:27,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3170 states and 4856 transitions. [2018-08-07 12:21:27,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-08-07 12:21:27,997 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:21:27,998 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:21:27,998 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 12:21:27,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1806511885, now seen corresponding path program 1 times [2018-08-07 12:21:27,998 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:21:27,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:21:28,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:21:28,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:21:28,000 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:21:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:21:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:21:28,272 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:21:28,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-08-07 12:21:28,273 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:21:28,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:21:28,274 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:21:28,274 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 12:21:28,274 INFO L87 Difference]: Start difference. First operand 3170 states and 4856 transitions. Second operand 6 states. [2018-08-07 12:21:42,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:21:42,752 INFO L93 Difference]: Finished difference Result 11143 states and 17392 transitions. [2018-08-07 12:21:42,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 12:21:42,753 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 150 [2018-08-07 12:21:42,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:21:42,796 INFO L225 Difference]: With dead ends: 11143 [2018-08-07 12:21:42,796 INFO L226 Difference]: Without dead ends: 7979 [2018-08-07 12:21:42,812 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 12:21:42,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7979 states. [2018-08-07 12:21:42,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7979 to 7914. [2018-08-07 12:21:42,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7914 states. [2018-08-07 12:21:43,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7914 states to 7914 states and 11767 transitions. [2018-08-07 12:21:43,004 INFO L78 Accepts]: Start accepts. Automaton has 7914 states and 11767 transitions. Word has length 150 [2018-08-07 12:21:43,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:21:43,005 INFO L480 AbstractCegarLoop]: Abstraction has 7914 states and 11767 transitions. [2018-08-07 12:21:43,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:21:43,005 INFO L276 IsEmpty]: Start isEmpty. Operand 7914 states and 11767 transitions. [2018-08-07 12:21:43,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-08-07 12:21:43,010 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:21:43,011 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:21:43,011 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 12:21:43,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1901996262, now seen corresponding path program 1 times [2018-08-07 12:21:43,011 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:21:43,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:21:43,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:21:43,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:21:43,013 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:21:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:21:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:21:43,355 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:21:43,355 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-08-07 12:21:43,355 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:21:43,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:21:43,356 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:21:43,356 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-08-07 12:21:43,356 INFO L87 Difference]: Start difference. First operand 7914 states and 11767 transitions. Second operand 5 states. [2018-08-07 12:22:03,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:22:03,921 INFO L93 Difference]: Finished difference Result 28950 states and 44098 transitions. [2018-08-07 12:22:03,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-08-07 12:22:03,922 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 175 [2018-08-07 12:22:03,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:22:04,029 INFO L225 Difference]: With dead ends: 28950 [2018-08-07 12:22:04,030 INFO L226 Difference]: Without dead ends: 21042 [2018-08-07 12:22:04,076 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-08-07 12:22:04,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21042 states. [2018-08-07 12:22:04,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21042 to 20798. [2018-08-07 12:22:04,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20798 states. [2018-08-07 12:22:04,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20798 states to 20798 states and 28627 transitions. [2018-08-07 12:22:04,687 INFO L78 Accepts]: Start accepts. Automaton has 20798 states and 28627 transitions. Word has length 175 [2018-08-07 12:22:04,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:22:04,688 INFO L480 AbstractCegarLoop]: Abstraction has 20798 states and 28627 transitions. [2018-08-07 12:22:04,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:22:04,688 INFO L276 IsEmpty]: Start isEmpty. Operand 20798 states and 28627 transitions. [2018-08-07 12:22:04,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-08-07 12:22:04,701 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:22:04,701 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:22:04,702 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 12:22:04,702 INFO L82 PathProgramCache]: Analyzing trace with hash 429182868, now seen corresponding path program 1 times [2018-08-07 12:22:04,702 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:22:04,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:22:04,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:22:04,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:22:04,704 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:22:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:22:05,076 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-08-07 12:22:05,077 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:22:05,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-08-07 12:22:05,077 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:22:05,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:22:05,078 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:22:05,078 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-08-07 12:22:05,078 INFO L87 Difference]: Start difference. First operand 20798 states and 28627 transitions. Second operand 5 states. [2018-08-07 12:22:18,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:22:18,505 INFO L93 Difference]: Finished difference Result 63516 states and 91349 transitions. [2018-08-07 12:22:18,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-08-07 12:22:18,507 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 228 [2018-08-07 12:22:18,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:22:18,670 INFO L225 Difference]: With dead ends: 63516 [2018-08-07 12:22:18,670 INFO L226 Difference]: Without dead ends: 42724 [2018-08-07 12:22:18,726 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 12:22:18,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42724 states. [2018-08-07 12:22:19,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42724 to 42294. [2018-08-07 12:22:19,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42294 states. [2018-08-07 12:22:19,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42294 states to 42294 states and 56753 transitions. [2018-08-07 12:22:19,863 INFO L78 Accepts]: Start accepts. Automaton has 42294 states and 56753 transitions. Word has length 228 [2018-08-07 12:22:19,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:22:19,864 INFO L480 AbstractCegarLoop]: Abstraction has 42294 states and 56753 transitions. [2018-08-07 12:22:19,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:22:19,864 INFO L276 IsEmpty]: Start isEmpty. Operand 42294 states and 56753 transitions. [2018-08-07 12:22:19,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-08-07 12:22:19,881 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:22:19,882 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:22:19,882 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 12:22:19,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1178955432, now seen corresponding path program 1 times [2018-08-07 12:22:19,882 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:22:19,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:22:19,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:22:19,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:22:19,884 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:22:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:22:20,188 WARN L170 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 12:22:20,626 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 128 proven. 76 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:22:20,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:22:20,626 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 12:22:20,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:22:20,643 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:22:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:22:20,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:22:21,335 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-08-07 12:22:21,336 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:22:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 128 proven. 76 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:22:22,537 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 12:22:22,537 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-08-07 12:22:22,537 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:22:22,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:22:22,538 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:22:22,539 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-08-07 12:22:22,540 INFO L87 Difference]: Start difference. First operand 42294 states and 56753 transitions. Second operand 5 states. [2018-08-07 12:22:35,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:22:35,762 INFO L93 Difference]: Finished difference Result 109907 states and 156671 transitions. [2018-08-07 12:22:35,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-08-07 12:22:35,762 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 266 [2018-08-07 12:22:35,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:22:36,096 INFO L225 Difference]: With dead ends: 109907 [2018-08-07 12:22:36,097 INFO L226 Difference]: Without dead ends: 67619 [2018-08-07 12:22:36,310 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 526 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2018-08-07 12:22:36,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67619 states. [2018-08-07 12:22:37,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67619 to 67259. [2018-08-07 12:22:37,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67259 states. [2018-08-07 12:22:37,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67259 states to 67259 states and 92411 transitions. [2018-08-07 12:22:37,955 INFO L78 Accepts]: Start accepts. Automaton has 67259 states and 92411 transitions. Word has length 266 [2018-08-07 12:22:37,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:22:37,958 INFO L480 AbstractCegarLoop]: Abstraction has 67259 states and 92411 transitions. [2018-08-07 12:22:37,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:22:37,958 INFO L276 IsEmpty]: Start isEmpty. Operand 67259 states and 92411 transitions. [2018-08-07 12:22:37,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-08-07 12:22:37,975 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:22:37,976 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:22:37,976 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 12:22:37,977 INFO L82 PathProgramCache]: Analyzing trace with hash 21705772, now seen corresponding path program 1 times [2018-08-07 12:22:37,977 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:22:37,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:22:37,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:22:37,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:22:37,985 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:22:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:22:38,433 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 202 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:22:38,433 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:22:38,434 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 12:22:39,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:22:39,114 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:22:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:22:39,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:22:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 202 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:22:39,438 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:22:39,663 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 202 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:22:39,696 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:22:39,697 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 12:22:39,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:22:39,726 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:22:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:22:39,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:22:40,042 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 202 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:22:40,042 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:22:40,251 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 202 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:22:40,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:22:40,254 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-08-07 12:22:40,254 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:22:40,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 12:22:40,255 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 12:22:40,255 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-08-07 12:22:40,255 INFO L87 Difference]: Start difference. First operand 67259 states and 92411 transitions. Second operand 9 states. [2018-08-07 12:23:00,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:23:00,956 INFO L93 Difference]: Finished difference Result 237912 states and 437689 transitions. [2018-08-07 12:23:00,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-08-07 12:23:00,957 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 272 [2018-08-07 12:23:00,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:23:01,726 INFO L225 Difference]: With dead ends: 237912 [2018-08-07 12:23:01,726 INFO L226 Difference]: Without dead ends: 140248 [2018-08-07 12:23:02,099 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1113 GetRequests, 1088 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2018-08-07 12:23:02,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140248 states. [2018-08-07 12:23:05,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140248 to 135271. [2018-08-07 12:23:05,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135271 states. [2018-08-07 12:23:06,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135271 states to 135271 states and 193377 transitions. [2018-08-07 12:23:06,404 INFO L78 Accepts]: Start accepts. Automaton has 135271 states and 193377 transitions. Word has length 272 [2018-08-07 12:23:06,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:23:06,405 INFO L480 AbstractCegarLoop]: Abstraction has 135271 states and 193377 transitions. [2018-08-07 12:23:06,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 12:23:06,405 INFO L276 IsEmpty]: Start isEmpty. Operand 135271 states and 193377 transitions. [2018-08-07 12:23:06,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2018-08-07 12:23:06,439 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:23:06,439 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:23:06,439 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 12:23:06,440 INFO L82 PathProgramCache]: Analyzing trace with hash 451280495, now seen corresponding path program 1 times [2018-08-07 12:23:06,440 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:23:06,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:23:06,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:23:06,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:23:06,441 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:23:06,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:23:06,760 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2018-08-07 12:23:06,760 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:23:06,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-08-07 12:23:06,760 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:23:06,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-07 12:23:06,761 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-07 12:23:06,761 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:23:06,761 INFO L87 Difference]: Start difference. First operand 135271 states and 193377 transitions. Second operand 4 states. [2018-08-07 12:23:20,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:23:20,633 INFO L93 Difference]: Finished difference Result 277113 states and 411852 transitions. [2018-08-07 12:23:20,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-08-07 12:23:20,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2018-08-07 12:23:20,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:23:21,324 INFO L225 Difference]: With dead ends: 277113 [2018-08-07 12:23:21,324 INFO L226 Difference]: Without dead ends: 164850 [2018-08-07 12:23:21,597 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 12:23:21,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164850 states. [2018-08-07 12:23:24,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164850 to 157092. [2018-08-07 12:23:24,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157092 states. [2018-08-07 12:23:25,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157092 states to 157092 states and 217505 transitions. [2018-08-07 12:23:25,134 INFO L78 Accepts]: Start accepts. Automaton has 157092 states and 217505 transitions. Word has length 337 [2018-08-07 12:23:25,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:23:25,135 INFO L480 AbstractCegarLoop]: Abstraction has 157092 states and 217505 transitions. [2018-08-07 12:23:25,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-08-07 12:23:25,135 INFO L276 IsEmpty]: Start isEmpty. Operand 157092 states and 217505 transitions. [2018-08-07 12:23:25,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2018-08-07 12:23:25,181 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:23:25,182 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:23:25,182 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 12:23:25,182 INFO L82 PathProgramCache]: Analyzing trace with hash -848936366, now seen corresponding path program 1 times [2018-08-07 12:23:25,183 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:23:25,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:23:25,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:23:25,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:23:25,184 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:23:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:23:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 128 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:23:25,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:23:25,576 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 12:23:25,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:23:25,585 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:23:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:23:25,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:23:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-08-07 12:23:27,281 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:23:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 128 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:23:27,507 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 12:23:27,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-08-07 12:23:27,507 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:23:27,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:23:27,508 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:23:27,508 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-08-07 12:23:27,508 INFO L87 Difference]: Start difference. First operand 157092 states and 217505 transitions. Second operand 5 states. [2018-08-07 12:23:42,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:23:42,241 INFO L93 Difference]: Finished difference Result 301086 states and 439528 transitions. [2018-08-07 12:23:42,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-08-07 12:23:42,242 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 390 [2018-08-07 12:23:42,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:23:42,620 INFO L225 Difference]: With dead ends: 301086 [2018-08-07 12:23:42,620 INFO L226 Difference]: Without dead ends: 144020 [2018-08-07 12:23:43,223 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 774 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2018-08-07 12:23:43,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144020 states. [2018-08-07 12:23:45,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144020 to 142264. [2018-08-07 12:23:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142264 states. [2018-08-07 12:23:45,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142264 states to 142264 states and 180781 transitions. [2018-08-07 12:23:45,498 INFO L78 Accepts]: Start accepts. Automaton has 142264 states and 180781 transitions. Word has length 390 [2018-08-07 12:23:45,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:23:45,499 INFO L480 AbstractCegarLoop]: Abstraction has 142264 states and 180781 transitions. [2018-08-07 12:23:45,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:23:45,499 INFO L276 IsEmpty]: Start isEmpty. Operand 142264 states and 180781 transitions. [2018-08-07 12:23:45,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2018-08-07 12:23:45,532 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:23:45,532 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-08-07 12:23:45,532 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 12:23:45,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1426266600, now seen corresponding path program 1 times [2018-08-07 12:23:45,533 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:23:45,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:23:45,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:23:45,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:23:45,534 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:23:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:23:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2018-08-07 12:23:45,947 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:23:45,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-08-07 12:23:45,947 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:23:45,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 12:23:45,948 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 12:23:45,948 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 12:23:45,949 INFO L87 Difference]: Start difference. First operand 142264 states and 180781 transitions. Second operand 3 states. [2018-08-07 12:23:54,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:23:54,372 INFO L93 Difference]: Finished difference Result 305901 states and 397357 transitions. [2018-08-07 12:23:54,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 12:23:54,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 459 [2018-08-07 12:23:54,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:23:55,545 INFO L225 Difference]: With dead ends: 305901 [2018-08-07 12:23:55,545 INFO L226 Difference]: Without dead ends: 164411 [2018-08-07 12:23:55,753 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 12:23:55,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164411 states. [2018-08-07 12:23:58,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164411 to 160524. [2018-08-07 12:23:58,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160524 states. [2018-08-07 12:23:58,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160524 states to 160524 states and 201705 transitions. [2018-08-07 12:23:58,518 INFO L78 Accepts]: Start accepts. Automaton has 160524 states and 201705 transitions. Word has length 459 [2018-08-07 12:23:58,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:23:58,519 INFO L480 AbstractCegarLoop]: Abstraction has 160524 states and 201705 transitions. [2018-08-07 12:23:58,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 12:23:58,519 INFO L276 IsEmpty]: Start isEmpty. Operand 160524 states and 201705 transitions. [2018-08-07 12:23:58,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2018-08-07 12:23:58,542 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:23:58,543 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-08-07 12:23:58,543 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 12:23:58,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1813068697, now seen corresponding path program 1 times [2018-08-07 12:23:58,544 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:23:58,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:23:58,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:23:58,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:23:58,545 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:23:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:23:59,476 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 416 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-08-07 12:23:59,476 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:23:59,476 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 12:23:59,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:23:59,491 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:23:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:23:59,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:24:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 416 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-08-07 12:24:00,404 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:24:00,681 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 416 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-08-07 12:24:00,702 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:24:00,702 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 12:24:00,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:24:00,717 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:24:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:24:01,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:24:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 416 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-08-07 12:24:01,451 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:24:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 416 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-08-07 12:24:02,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:24:02,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-08-07 12:24:02,849 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:24:02,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 12:24:02,851 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 12:24:02,851 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-08-07 12:24:02,852 INFO L87 Difference]: Start difference. First operand 160524 states and 201705 transitions. Second operand 9 states. [2018-08-07 12:24:21,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:24:21,554 INFO L93 Difference]: Finished difference Result 352468 states and 485101 transitions. [2018-08-07 12:24:21,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-08-07 12:24:21,554 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 510 [2018-08-07 12:24:21,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:24:22,382 INFO L225 Difference]: With dead ends: 352468 [2018-08-07 12:24:22,382 INFO L226 Difference]: Without dead ends: 183360 [2018-08-07 12:24:22,658 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 2058 GetRequests, 2036 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2018-08-07 12:24:22,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183360 states. [2018-08-07 12:24:25,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183360 to 176783. [2018-08-07 12:24:25,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176783 states. [2018-08-07 12:24:26,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176783 states to 176783 states and 222466 transitions. [2018-08-07 12:24:26,096 INFO L78 Accepts]: Start accepts. Automaton has 176783 states and 222466 transitions. Word has length 510 [2018-08-07 12:24:26,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:24:26,097 INFO L480 AbstractCegarLoop]: Abstraction has 176783 states and 222466 transitions. [2018-08-07 12:24:26,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 12:24:26,098 INFO L276 IsEmpty]: Start isEmpty. Operand 176783 states and 222466 transitions. [2018-08-07 12:24:26,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2018-08-07 12:24:26,161 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:24:26,161 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:24:26,162 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 12:24:26,162 INFO L82 PathProgramCache]: Analyzing trace with hash 761664695, now seen corresponding path program 1 times [2018-08-07 12:24:26,162 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:24:26,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:24:26,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:24:26,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:24:26,163 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:24:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-08-07 12:24:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2018-08-07 12:24:27,568 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:24:27,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-08-07 12:24:27,568 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:24:27,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-07 12:24:27,570 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-07 12:24:27,570 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:24:27,570 INFO L87 Difference]: Start difference. First operand 176783 states and 222466 transitions. Second operand 4 states. [2018-08-07 12:24:27,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-08-07 12:24:27,571 WARN L549 AbstractCegarLoop]: Verification canceled [2018-08-07 12:24:27,580 WARN L202 ceAbstractionStarter]: Timeout [2018-08-07 12:24:27,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.08 12:24:27 BoogieIcfgContainer [2018-08-07 12:24:27,580 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-08-07 12:24:27,581 INFO L168 Benchmark]: Toolchain (without parser) took 224823.78 ms. Allocated memory was 1.5 GB in the beginning and 4.5 GB in the end (delta: 3.0 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -444.5 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-08-07 12:24:27,583 INFO L168 Benchmark]: CDTParser took 0.26 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 12:24:27,584 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2405.13 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 243.1 MB). Peak memory consumption was 243.1 MB. Max. memory is 7.1 GB. [2018-08-07 12:24:27,584 INFO L168 Benchmark]: Boogie Procedure Inliner took 233.46 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2018-08-07 12:24:27,585 INFO L168 Benchmark]: Boogie Preprocessor took 1034.96 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 912.8 MB). Free memory was 1.1 GB in the beginning and 2.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 128.0 MB. Max. memory is 7.1 GB. [2018-08-07 12:24:27,587 INFO L168 Benchmark]: RCFGBuilder took 12347.60 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 1.6 GB in the end (delta: 724.4 MB). Peak memory consumption was 724.4 MB. Max. memory is 7.1 GB. [2018-08-07 12:24:27,588 INFO L168 Benchmark]: TraceAbstraction took 208796.85 ms. Allocated memory was 2.4 GB in the beginning and 4.5 GB in the end (delta: 2.1 GB). Free memory was 1.6 GB in the beginning and 1.8 GB in the end (delta: -259.1 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-08-07 12:24:27,595 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 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 2405.13 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 243.1 MB). Peak memory consumption was 243.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 233.46 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 1034.96 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 912.8 MB). Free memory was 1.1 GB in the beginning and 2.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 128.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 12347.60 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 1.6 GB in the end (delta: 724.4 MB). Peak memory consumption was 724.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 208796.85 ms. Allocated memory was 2.4 GB in the beginning and 4.5 GB in the end (delta: 2.1 GB). Free memory was 1.6 GB in the beginning and 1.8 GB in the end (delta: -259.1 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 204]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 204). Cancelled while BasicCegarLoop was constructing difference of abstraction (176783states) and FLOYD_HOARE automaton (currently 2 states, 4 states before enhancement), while ReachableStatesComputation was computing reachable states (1 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 840 locations, 1 error locations. TIMEOUT Result, 208.5s OverallTime, 12 OverallIterations, 4 TraceHistogramMax, 172.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2885 SDtfs, 31951 SDslu, 1968 SDs, 0 SdLazy, 69361 SolverSat, 16355 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 133.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4560 GetRequests, 4447 SyntacticMatches, 24 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 5.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=176783occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 20.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 26082 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 11.8s InterpolantComputationTime, 5837 NumberOfCodeBlocks, 5837 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 8033 ConstructedInterpolants, 0 QuantifiedInterpolants, 8293281 SizeOfPredicates, 2 NumberOfNonLiveVariables, 3592 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 24 InterpolantComputations, 10 PerfectInterpolantSequences, 6231/6633 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem12_label22_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-08-07_12-24-27-627.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem12_label22_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-08-07_12-24-27-627.csv Completed graceful shutdown