java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label58_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 11:09:16,402 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 11:09:16,406 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 11:09:16,422 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 11:09:16,423 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 11:09:16,424 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 11:09:16,427 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 11:09:16,430 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 11:09:16,432 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 11:09:16,434 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 11:09:16,437 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 11:09:16,438 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 11:09:16,439 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 11:09:16,439 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 11:09:16,441 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 11:09:16,441 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 11:09:16,442 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 11:09:16,444 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 11:09:16,446 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 11:09:16,448 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 11:09:16,449 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 11:09:16,450 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 11:09:16,452 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 11:09:16,453 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 11:09:16,453 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 11:09:16,454 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 11:09:16,455 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 11:09:16,456 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 11:09:16,456 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 11:09:16,458 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 11:09:16,458 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 11:09:16,458 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 11:09:16,459 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 11:09:16,459 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 11:09:16,461 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 11:09:16,462 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 11:09:16,463 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-07-24 11:09:16,493 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 11:09:16,493 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 11:09:16,494 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 11:09:16,494 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 11:09:16,494 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 11:09:16,494 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 11:09:16,495 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 11:09:16,495 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 11:09:16,495 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 11:09:16,495 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 11:09:16,495 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 11:09:16,496 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 11:09:16,496 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 11:09:16,496 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 11:09:16,497 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 11:09:16,497 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 11:09:16,497 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 11:09:16,497 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 11:09:16,497 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 11:09:16,498 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 11:09:16,498 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 11:09:16,498 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 11:09:16,498 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 11:09:16,498 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 11:09:16,499 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 11:09:16,499 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 11:09:16,499 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 11:09:16,499 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 11:09:16,499 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 11:09:16,500 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 11:09:16,500 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 11:09:16,500 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 11:09:16,500 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 11:09:16,547 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 11:09:16,562 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 11:09:16,568 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 11:09:16,570 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 11:09:16,570 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 11:09:16,571 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label58_false-unreach-call_false-termination.c [2018-07-24 11:09:16,931 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a184bfc6d/d71e3399c6294967a828610aae9c211d/FLAG6702919d9 [2018-07-24 11:09:17,409 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 11:09:17,410 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label58_false-unreach-call_false-termination.c [2018-07-24 11:09:17,450 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a184bfc6d/d71e3399c6294967a828610aae9c211d/FLAG6702919d9 [2018-07-24 11:09:17,468 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a184bfc6d/d71e3399c6294967a828610aae9c211d [2018-07-24 11:09:17,482 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 11:09:17,484 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 11:09:17,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 11:09:17,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 11:09:17,497 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 11:09:17,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 11:09:17" (1/1) ... [2018-07-24 11:09:17,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b26fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:09:17, skipping insertion in model container [2018-07-24 11:09:17,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 11:09:17" (1/1) ... [2018-07-24 11:09:17,825 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 11:09:18,965 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 11:09:18,985 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 11:09:19,804 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 11:09:19,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:09:19 WrapperNode [2018-07-24 11:09:19,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 11:09:19,983 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 11:09:19,983 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 11:09:19,983 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 11:09:19,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:09:19" (1/1) ... [2018-07-24 11:09:20,070 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:09:19" (1/1) ... [2018-07-24 11:09:20,125 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 11:09:20,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 11:09:20,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 11:09:20,126 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 11:09:20,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:09:19" (1/1) ... [2018-07-24 11:09:20,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:09:19" (1/1) ... [2018-07-24 11:09:20,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:09:19" (1/1) ... [2018-07-24 11:09:20,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:09:19" (1/1) ... [2018-07-24 11:09:20,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:09:19" (1/1) ... [2018-07-24 11:09:20,700 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:09:19" (1/1) ... [2018-07-24 11:09:20,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:09:19" (1/1) ... [2018-07-24 11:09:20,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 11:09:20,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 11:09:20,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 11:09:20,784 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 11:09:20,786 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:09:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 11:09:20,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 11:09:20,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 11:09:20,857 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_output3 [2018-07-24 11:09:20,857 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_output3 [2018-07-24 11:09:20,858 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_output4 [2018-07-24 11:09:20,858 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_output4 [2018-07-24 11:09:20,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 11:09:20,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 11:09:20,859 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 11:09:20,859 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 11:09:20,859 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_output [2018-07-24 11:09:20,859 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_output [2018-07-24 11:09:20,859 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_output2 [2018-07-24 11:09:20,859 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_output2 [2018-07-24 11:09:32,500 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 11:09:32,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 11:09:32 BoogieIcfgContainer [2018-07-24 11:09:32,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 11:09:32,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 11:09:32,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 11:09:32,505 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 11:09:32,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 11:09:17" (1/3) ... [2018-07-24 11:09:32,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d1e378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 11:09:32, skipping insertion in model container [2018-07-24 11:09:32,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:09:19" (2/3) ... [2018-07-24 11:09:32,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d1e378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 11:09:32, skipping insertion in model container [2018-07-24 11:09:32,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 11:09:32" (3/3) ... [2018-07-24 11:09:32,509 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem04_label58_false-unreach-call_false-termination.c [2018-07-24 11:09:32,518 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 11:09:32,527 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 11:09:32,586 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 11:09:32,586 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 11:09:32,587 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 11:09:32,587 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 11:09:32,587 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 11:09:32,587 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 11:09:32,587 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 11:09:32,587 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 11:09:32,588 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 11:09:32,628 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states. [2018-07-24 11:09:32,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2018-07-24 11:09:32,676 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:09:32,678 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:09:32,679 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_output4Err0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:09:32,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1651792699, now seen corresponding path program 1 times [2018-07-24 11:09:32,687 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:09:32,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:09:32,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:09:32,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:09:32,741 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:09:33,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:09:34,004 WARN L169 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 11:09:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:09:35,038 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:09:35,039 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 11:09:35,039 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:09:35,047 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 11:09:35,060 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 11:09:35,061 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 11:09:35,063 INFO L87 Difference]: Start difference. First operand 907 states. Second operand 3 states. [2018-07-24 11:09:42,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:09:42,194 INFO L93 Difference]: Finished difference Result 2647 states and 5102 transitions. [2018-07-24 11:09:42,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 11:09:42,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 775 [2018-07-24 11:09:42,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:09:42,234 INFO L225 Difference]: With dead ends: 2647 [2018-07-24 11:09:42,234 INFO L226 Difference]: Without dead ends: 1738 [2018-07-24 11:09:42,246 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 5 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 11:09:42,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2018-07-24 11:09:42,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1738. [2018-07-24 11:09:42,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1738 states. [2018-07-24 11:09:42,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 3151 transitions. [2018-07-24 11:09:42,406 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 3151 transitions. Word has length 775 [2018-07-24 11:09:42,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:09:42,409 INFO L471 AbstractCegarLoop]: Abstraction has 1738 states and 3151 transitions. [2018-07-24 11:09:42,409 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 11:09:42,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 3151 transitions. [2018-07-24 11:09:42,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 785 [2018-07-24 11:09:42,442 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:09:42,443 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:09:42,443 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_output4Err0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:09:42,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1050187224, now seen corresponding path program 1 times [2018-07-24 11:09:42,444 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:09:42,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:09:42,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:09:42,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:09:42,446 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:09:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:09:43,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:09:43,696 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:09:43,696 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 11:09:43,697 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:09:43,700 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 11:09:43,700 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 11:09:43,700 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 11:09:43,701 INFO L87 Difference]: Start difference. First operand 1738 states and 3151 transitions. Second operand 3 states. [2018-07-24 11:09:50,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:09:50,866 INFO L93 Difference]: Finished difference Result 5140 states and 9440 transitions. [2018-07-24 11:09:50,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 11:09:50,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 784 [2018-07-24 11:09:50,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:09:50,893 INFO L225 Difference]: With dead ends: 5140 [2018-07-24 11:09:50,893 INFO L226 Difference]: Without dead ends: 3408 [2018-07-24 11:09:50,900 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 11:09:50,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2018-07-24 11:09:50,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 3408. [2018-07-24 11:09:50,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3408 states. [2018-07-24 11:09:50,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3408 states to 3408 states and 5841 transitions. [2018-07-24 11:09:50,993 INFO L78 Accepts]: Start accepts. Automaton has 3408 states and 5841 transitions. Word has length 784 [2018-07-24 11:09:50,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:09:50,996 INFO L471 AbstractCegarLoop]: Abstraction has 3408 states and 5841 transitions. [2018-07-24 11:09:50,996 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 11:09:50,996 INFO L276 IsEmpty]: Start isEmpty. Operand 3408 states and 5841 transitions. [2018-07-24 11:09:51,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2018-07-24 11:09:51,014 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:09:51,016 INFO L353 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:09:51,016 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_output4Err0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:09:51,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1017649541, now seen corresponding path program 1 times [2018-07-24 11:09:51,017 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:09:51,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:09:51,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:09:51,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:09:51,020 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:09:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:09:51,351 WARN L169 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 11:09:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 67 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:09:52,362 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:09:52,362 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:09:52,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:09:52,376 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:09:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:09:52,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:09:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-07-24 11:09:53,699 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:09:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 67 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:09:54,739 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 11:09:54,739 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 11:09:54,740 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:09:54,741 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 11:09:54,742 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 11:09:54,742 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-07-24 11:09:54,742 INFO L87 Difference]: Start difference. First operand 3408 states and 5841 transitions. Second operand 5 states. [2018-07-24 11:10:05,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:10:05,980 INFO L93 Difference]: Finished difference Result 8684 states and 14860 transitions. [2018-07-24 11:10:05,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 11:10:05,988 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 848 [2018-07-24 11:10:05,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:10:06,021 INFO L225 Difference]: With dead ends: 8684 [2018-07-24 11:10:06,022 INFO L226 Difference]: Without dead ends: 5282 [2018-07-24 11:10:06,032 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1703 GetRequests, 1690 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-07-24 11:10:06,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5282 states. [2018-07-24 11:10:06,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5282 to 5240. [2018-07-24 11:10:06,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5240 states. [2018-07-24 11:10:06,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5240 states to 5240 states and 8150 transitions. [2018-07-24 11:10:06,172 INFO L78 Accepts]: Start accepts. Automaton has 5240 states and 8150 transitions. Word has length 848 [2018-07-24 11:10:06,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:10:06,173 INFO L471 AbstractCegarLoop]: Abstraction has 5240 states and 8150 transitions. [2018-07-24 11:10:06,173 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 11:10:06,173 INFO L276 IsEmpty]: Start isEmpty. Operand 5240 states and 8150 transitions. [2018-07-24 11:10:06,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 860 [2018-07-24 11:10:06,200 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:10:06,201 INFO L353 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:10:06,201 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_output4Err0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:10:06,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1284480623, now seen corresponding path program 1 times [2018-07-24 11:10:06,202 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:10:06,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:10:06,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:10:06,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:10:06,204 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:10:06,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:10:06,571 WARN L169 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 11:10:07,230 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:10:07,231 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:10:07,231 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:10:07,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:10:07,241 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:10:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:10:07,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:10:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-07-24 11:10:08,096 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:10:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:10:08,696 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 11:10:08,696 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-07-24 11:10:08,696 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:10:08,697 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 11:10:08,698 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 11:10:08,698 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-07-24 11:10:08,698 INFO L87 Difference]: Start difference. First operand 5240 states and 8150 transitions. Second operand 5 states. [2018-07-24 11:10:16,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:10:16,052 INFO L93 Difference]: Finished difference Result 15758 states and 25347 transitions. [2018-07-24 11:10:16,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 11:10:16,052 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 859 [2018-07-24 11:10:16,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:10:16,100 INFO L225 Difference]: With dead ends: 15758 [2018-07-24 11:10:16,100 INFO L226 Difference]: Without dead ends: 10524 [2018-07-24 11:10:16,116 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1727 GetRequests, 1712 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2018-07-24 11:10:16,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10524 states. [2018-07-24 11:10:16,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10524 to 10459. [2018-07-24 11:10:16,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10459 states. [2018-07-24 11:10:16,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10459 states to 10459 states and 15682 transitions. [2018-07-24 11:10:16,404 INFO L78 Accepts]: Start accepts. Automaton has 10459 states and 15682 transitions. Word has length 859 [2018-07-24 11:10:16,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:10:16,405 INFO L471 AbstractCegarLoop]: Abstraction has 10459 states and 15682 transitions. [2018-07-24 11:10:16,405 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 11:10:16,411 INFO L276 IsEmpty]: Start isEmpty. Operand 10459 states and 15682 transitions. [2018-07-24 11:10:16,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 866 [2018-07-24 11:10:16,459 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:10:16,460 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:10:16,460 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_output4Err0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:10:16,460 INFO L82 PathProgramCache]: Analyzing trace with hash -785154461, now seen corresponding path program 1 times [2018-07-24 11:10:16,460 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:10:16,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:10:16,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:10:16,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:10:16,462 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:10:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:10:16,811 WARN L169 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 11:10:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 85 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-07-24 11:10:17,115 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:10:17,115 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:10:17,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:10:17,123 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:10:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:10:17,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:10:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:10:18,104 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:10:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:10:18,553 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:10:18,553 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 11:10:18,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:10:18,569 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:10:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:10:19,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:10:20,448 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-07-24 11:10:20,449 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:10:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-07-24 11:10:21,165 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 3 imperfect interpolant sequences. [2018-07-24 11:10:21,166 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 5, 5] total 13 [2018-07-24 11:10:21,166 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:10:21,168 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 11:10:21,168 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 11:10:21,168 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-07-24 11:10:21,169 INFO L87 Difference]: Start difference. First operand 10459 states and 15682 transitions. Second operand 5 states. [2018-07-24 11:10:27,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:10:27,772 INFO L93 Difference]: Finished difference Result 26343 states and 39706 transitions. [2018-07-24 11:10:27,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 11:10:27,773 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 865 [2018-07-24 11:10:27,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:10:27,833 INFO L225 Difference]: With dead ends: 26343 [2018-07-24 11:10:27,833 INFO L226 Difference]: Without dead ends: 15890 [2018-07-24 11:10:27,867 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3468 GetRequests, 3449 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-07-24 11:10:27,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15890 states. [2018-07-24 11:10:28,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15890 to 15860. [2018-07-24 11:10:28,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15860 states. [2018-07-24 11:10:28,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15860 states to 15860 states and 22873 transitions. [2018-07-24 11:10:28,222 INFO L78 Accepts]: Start accepts. Automaton has 15860 states and 22873 transitions. Word has length 865 [2018-07-24 11:10:28,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:10:28,222 INFO L471 AbstractCegarLoop]: Abstraction has 15860 states and 22873 transitions. [2018-07-24 11:10:28,222 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 11:10:28,222 INFO L276 IsEmpty]: Start isEmpty. Operand 15860 states and 22873 transitions. [2018-07-24 11:10:28,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 877 [2018-07-24 11:10:28,287 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:10:28,287 INFO L353 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:10:28,288 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_output4Err0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:10:28,288 INFO L82 PathProgramCache]: Analyzing trace with hash -825511044, now seen corresponding path program 1 times [2018-07-24 11:10:28,288 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:10:28,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:10:28,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:10:28,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:10:28,290 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:10:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:10:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 104 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-24 11:10:29,508 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:10:29,509 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:10:29,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:10:29,519 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:10:29,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:10:29,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:10:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 76 proven. 2 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-07-24 11:10:30,560 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:10:31,001 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 104 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-24 11:10:31,025 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:10:31,025 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-07-24 11:10:31,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:10:31,043 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:10:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:10:31,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:10:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 76 proven. 2 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-07-24 11:10:32,695 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:10:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 104 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-24 11:10:33,040 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:10:33,040 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-07-24 11:10:33,041 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:10:33,044 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 11:10:33,045 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 11:10:33,045 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2018-07-24 11:10:33,045 INFO L87 Difference]: Start difference. First operand 15860 states and 22873 transitions. Second operand 9 states. [2018-07-24 11:10:58,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:10:58,185 INFO L93 Difference]: Finished difference Result 61232 states and 107008 transitions. [2018-07-24 11:10:58,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-24 11:10:58,186 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 876 [2018-07-24 11:10:58,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:10:58,417 INFO L225 Difference]: With dead ends: 61232 [2018-07-24 11:10:58,417 INFO L226 Difference]: Without dead ends: 45378 [2018-07-24 11:10:58,494 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3592 GetRequests, 3535 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=605, Invalid=2587, Unknown=0, NotChecked=0, Total=3192 [2018-07-24 11:10:58,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45378 states. [2018-07-24 11:10:59,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45378 to 44338. [2018-07-24 11:10:59,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44338 states. [2018-07-24 11:10:59,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44338 states to 44338 states and 59689 transitions. [2018-07-24 11:10:59,810 INFO L78 Accepts]: Start accepts. Automaton has 44338 states and 59689 transitions. Word has length 876 [2018-07-24 11:10:59,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:10:59,810 INFO L471 AbstractCegarLoop]: Abstraction has 44338 states and 59689 transitions. [2018-07-24 11:10:59,810 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 11:10:59,811 INFO L276 IsEmpty]: Start isEmpty. Operand 44338 states and 59689 transitions. [2018-07-24 11:10:59,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 902 [2018-07-24 11:10:59,952 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:10:59,953 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:10:59,953 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_output4Err0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:10:59,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1796849844, now seen corresponding path program 1 times [2018-07-24 11:10:59,954 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:10:59,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:10:59,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:10:59,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:10:59,955 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:11:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:11:02,221 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 117 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:11:02,221 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:11:02,221 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:11:02,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:11:02,229 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:11:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:11:02,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:11:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:11:03,680 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:11:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:11:04,240 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 11:11:04,241 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-07-24 11:11:04,241 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:11:04,242 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 11:11:04,243 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 11:11:04,243 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-07-24 11:11:04,243 INFO L87 Difference]: Start difference. First operand 44338 states and 59689 transitions. Second operand 3 states. [2018-07-24 11:11:10,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:11:10,265 INFO L93 Difference]: Finished difference Result 126394 states and 175409 transitions. [2018-07-24 11:11:10,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 11:11:10,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 901 [2018-07-24 11:11:10,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:11:10,590 INFO L225 Difference]: With dead ends: 126394 [2018-07-24 11:11:10,590 INFO L226 Difference]: Without dead ends: 82062 [2018-07-24 11:11:10,689 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1814 GetRequests, 1802 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-07-24 11:11:10,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82062 states. [2018-07-24 11:11:12,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82062 to 81222. [2018-07-24 11:11:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81222 states. [2018-07-24 11:11:12,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81222 states to 81222 states and 112154 transitions. [2018-07-24 11:11:12,441 INFO L78 Accepts]: Start accepts. Automaton has 81222 states and 112154 transitions. Word has length 901 [2018-07-24 11:11:12,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:11:12,442 INFO L471 AbstractCegarLoop]: Abstraction has 81222 states and 112154 transitions. [2018-07-24 11:11:12,442 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 11:11:12,442 INFO L276 IsEmpty]: Start isEmpty. Operand 81222 states and 112154 transitions. [2018-07-24 11:11:12,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1052 [2018-07-24 11:11:12,613 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:11:12,614 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:11:12,614 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_output4Err0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:11:12,615 INFO L82 PathProgramCache]: Analyzing trace with hash -2018840812, now seen corresponding path program 1 times [2018-07-24 11:11:12,615 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:11:12,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:11:12,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:11:12,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:11:12,616 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:11:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:11:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 319 proven. 48 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-07-24 11:11:14,539 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:11:14,539 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:11:14,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:11:14,554 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:11:15,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:11:15,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:11:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 365 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-07-24 11:11:15,789 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:11:16,503 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 319 proven. 48 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-07-24 11:11:16,525 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:11:16,526 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 11:11:16,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:11:16,541 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:11:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:11:17,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:11:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 365 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-07-24 11:11:18,293 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:11:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 319 proven. 48 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-07-24 11:11:18,877 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:11:18,878 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-07-24 11:11:18,878 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:11:18,880 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 11:11:18,880 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 11:11:18,881 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2018-07-24 11:11:18,881 INFO L87 Difference]: Start difference. First operand 81222 states and 112154 transitions. Second operand 9 states. [2018-07-24 11:11:46,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:11:46,083 INFO L93 Difference]: Finished difference Result 276769 states and 466113 transitions. [2018-07-24 11:11:46,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-24 11:11:46,084 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1051 [2018-07-24 11:11:46,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:11:47,131 INFO L225 Difference]: With dead ends: 276769 [2018-07-24 11:11:47,131 INFO L226 Difference]: Without dead ends: 195553 [2018-07-24 11:11:47,385 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4272 GetRequests, 4225 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=417, Invalid=1745, Unknown=0, NotChecked=0, Total=2162 [2018-07-24 11:11:47,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195553 states. [2018-07-24 11:11:52,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195553 to 181078. [2018-07-24 11:11:52,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181078 states. [2018-07-24 11:11:52,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181078 states to 181078 states and 233808 transitions. [2018-07-24 11:11:52,758 INFO L78 Accepts]: Start accepts. Automaton has 181078 states and 233808 transitions. Word has length 1051 [2018-07-24 11:11:52,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:11:52,759 INFO L471 AbstractCegarLoop]: Abstraction has 181078 states and 233808 transitions. [2018-07-24 11:11:52,759 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 11:11:52,759 INFO L276 IsEmpty]: Start isEmpty. Operand 181078 states and 233808 transitions. [2018-07-24 11:11:53,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1123 [2018-07-24 11:11:53,061 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:11:53,062 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:11:53,062 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_output4Err0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:11:53,063 INFO L82 PathProgramCache]: Analyzing trace with hash -423239023, now seen corresponding path program 1 times [2018-07-24 11:11:53,063 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:11:53,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:11:53,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:11:53,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:11:53,064 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:11:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:11:54,075 WARN L169 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 11:11:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 194 proven. 298 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:11:56,554 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:11:56,555 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:11:56,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:11:56,566 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:11:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:11:57,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:11:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2018-07-24 11:11:58,286 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:11:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2018-07-24 11:11:59,522 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 11:11:59,522 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-07-24 11:11:59,523 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:11:59,523 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 11:11:59,524 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 11:11:59,524 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-07-24 11:11:59,524 INFO L87 Difference]: Start difference. First operand 181078 states and 233808 transitions. Second operand 3 states. [2018-07-24 11:12:06,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:12:06,966 INFO L93 Difference]: Finished difference Result 351845 states and 454198 transitions. [2018-07-24 11:12:06,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 11:12:06,967 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1122 [2018-07-24 11:12:06,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:12:07,413 INFO L225 Difference]: With dead ends: 351845 [2018-07-24 11:12:07,414 INFO L226 Difference]: Without dead ends: 170778 [2018-07-24 11:12:07,669 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2258 GetRequests, 2244 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-07-24 11:12:07,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170778 states. [2018-07-24 11:12:10,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170778 to 166537. [2018-07-24 11:12:10,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166537 states. [2018-07-24 11:12:11,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166537 states to 166537 states and 200369 transitions. [2018-07-24 11:12:11,246 INFO L78 Accepts]: Start accepts. Automaton has 166537 states and 200369 transitions. Word has length 1122 [2018-07-24 11:12:11,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:12:11,247 INFO L471 AbstractCegarLoop]: Abstraction has 166537 states and 200369 transitions. [2018-07-24 11:12:11,247 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 11:12:11,247 INFO L276 IsEmpty]: Start isEmpty. Operand 166537 states and 200369 transitions. [2018-07-24 11:12:11,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1342 [2018-07-24 11:12:11,534 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:12:11,535 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:12:11,535 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_output4Err0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:12:11,535 INFO L82 PathProgramCache]: Analyzing trace with hash 281983953, now seen corresponding path program 1 times [2018-07-24 11:12:11,535 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:12:11,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:12:11,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:12:11,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:12:11,537 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:12:11,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:12:12,049 WARN L169 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 11:12:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 585 proven. 292 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2018-07-24 11:12:14,272 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:12:14,272 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:12:14,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:12:14,280 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:12:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:12:14,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:12:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 507 proven. 2 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2018-07-24 11:12:15,985 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:12:17,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 602 proven. 41 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2018-07-24 11:12:17,159 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:12:17,159 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 11:12:17,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:12:17,176 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:12:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:12:18,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:12:19,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 507 proven. 2 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2018-07-24 11:12:19,011 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:12:19,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 602 proven. 41 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2018-07-24 11:12:19,640 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:12:19,641 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5, 5, 5] total 16 [2018-07-24 11:12:19,641 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:12:19,643 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 11:12:19,643 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 11:12:19,643 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-07-24 11:12:19,643 INFO L87 Difference]: Start difference. First operand 166537 states and 200369 transitions. Second operand 14 states. [2018-07-24 11:12:51,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:12:51,599 INFO L93 Difference]: Finished difference Result 463361 states and 583793 transitions. [2018-07-24 11:12:51,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-24 11:12:51,600 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1341 [2018-07-24 11:12:51,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:12:52,800 INFO L225 Difference]: With dead ends: 463361 [2018-07-24 11:12:52,801 INFO L226 Difference]: Without dead ends: 296835 [2018-07-24 11:12:53,115 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5461 GetRequests, 5398 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=869, Invalid=2913, Unknown=0, NotChecked=0, Total=3782 [2018-07-24 11:12:53,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296835 states. Received shutdown request... [2018-07-24 11:12:55,455 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 11:12:55,460 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 11:12:55,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 11:12:55 BoogieIcfgContainer [2018-07-24 11:12:55,460 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 11:12:55,461 INFO L168 Benchmark]: Toolchain (without parser) took 217978.94 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -97.9 MB). Peak memory consumption was 3.2 GB. Max. memory is 7.1 GB. [2018-07-24 11:12:55,463 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 11:12:55,463 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2496.56 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: 222.0 MB). Peak memory consumption was 222.0 MB. Max. memory is 7.1 GB. [2018-07-24 11:12:55,464 INFO L168 Benchmark]: Boogie Procedure Inliner took 142.62 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-24 11:12:55,465 INFO L168 Benchmark]: Boogie Preprocessor took 657.59 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 844.6 MB). Free memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 89.0 MB. Max. memory is 7.1 GB. [2018-07-24 11:12:55,465 INFO L168 Benchmark]: RCFGBuilder took 11717.58 ms. Allocated memory was 2.4 GB in the beginning and 2.5 GB in the end (delta: 159.4 MB). Free memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: -9.6 MB). Peak memory consumption was 716.6 MB. Max. memory is 7.1 GB. [2018-07-24 11:12:55,466 INFO L168 Benchmark]: TraceAbstraction took 202958.67 ms. Allocated memory was 2.5 GB in the beginning and 3.8 GB in the end (delta: 1.2 GB). Free memory was 2.3 GB in the beginning and 1.5 GB in the end (delta: 790.8 MB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. [2018-07-24 11:12:55,475 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2496.56 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: 222.0 MB). Peak memory consumption was 222.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 142.62 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 657.59 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 844.6 MB). Free memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 89.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 11717.58 ms. Allocated memory was 2.4 GB in the beginning and 2.5 GB in the end (delta: 159.4 MB). Free memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: -9.6 MB). Peak memory consumption was 716.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 202958.67 ms. Allocated memory was 2.5 GB in the beginning and 3.8 GB in the end (delta: 1.2 GB). Free memory was 2.3 GB in the beginning and 1.5 GB in the end (delta: 790.8 MB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 4643]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 4643). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 907 locations, 1 error locations. TIMEOUT Result, 202.8s OverallTime, 10 OverallIterations, 7 TraceHistogramMax, 141.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3438 SDtfs, 43187 SDslu, 2621 SDs, 0 SdLazy, 83599 SolverSat, 26101 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 103.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24310 GetRequests, 24063 SyntacticMatches, 39 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2721 ImplicationChecksByTransitivity, 10.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=181078occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 15.3s AutomataMinimizationTime, 10 MinimizatonAttempts, 20733 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.2s SsaConstructionTime, 7.4s SatisfiabilityAnalysisTime, 26.6s InterpolantComputationTime, 21418 NumberOfCodeBlocks, 21418 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 33380 ConstructedInterpolants, 0 QuantifiedInterpolants, 54831380 SizeOfPredicates, 16 NumberOfNonLiveVariables, 17218 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 34 InterpolantComputations, 10 PerfectInterpolantSequences, 10022/10989 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/Problem04_label58_false-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_11-12-55-493.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem04_label58_false-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_11-12-55-493.csv Completed graceful shutdown