java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label48_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ddc4263 [2018-08-07 11:15:34,058 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-08-07 11:15:34,060 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-08-07 11:15:34,073 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-08-07 11:15:34,073 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-08-07 11:15:34,074 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-08-07 11:15:34,075 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-08-07 11:15:34,078 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-08-07 11:15:34,080 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-08-07 11:15:34,089 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-08-07 11:15:34,091 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-08-07 11:15:34,091 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-08-07 11:15:34,092 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-08-07 11:15:34,093 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-08-07 11:15:34,094 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-08-07 11:15:34,098 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-08-07 11:15:34,099 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-08-07 11:15:34,105 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-08-07 11:15:34,111 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-08-07 11:15:34,112 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-08-07 11:15:34,115 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-08-07 11:15:34,117 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-08-07 11:15:34,120 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-08-07 11:15:34,120 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-08-07 11:15:34,120 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-08-07 11:15:34,123 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-08-07 11:15:34,124 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-08-07 11:15:34,125 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-08-07 11:15:34,127 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-08-07 11:15:34,128 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-08-07 11:15:34,128 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-08-07 11:15:34,130 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-08-07 11:15:34,131 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-08-07 11:15:34,131 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-08-07 11:15:34,134 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-08-07 11:15:34,135 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-08-07 11:15:34,135 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-08-07 11:15:34,159 INFO L110 SettingsManager]: Loading preferences was successful [2018-08-07 11:15:34,160 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-08-07 11:15:34,161 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-08-07 11:15:34,161 INFO L133 SettingsManager]: * User list type=DISABLED [2018-08-07 11:15:34,162 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-08-07 11:15:34,162 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-08-07 11:15:34,162 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-08-07 11:15:34,162 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-08-07 11:15:34,163 INFO L133 SettingsManager]: * Log string format=TERM [2018-08-07 11:15:34,163 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-08-07 11:15:34,164 INFO L133 SettingsManager]: * Interval Domain=false [2018-08-07 11:15:34,164 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-08-07 11:15:34,165 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-08-07 11:15:34,165 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-08-07 11:15:34,165 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-08-07 11:15:34,166 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-08-07 11:15:34,167 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-08-07 11:15:34,167 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-08-07 11:15:34,167 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-08-07 11:15:34,167 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-08-07 11:15:34,168 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-08-07 11:15:34,168 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-08-07 11:15:34,168 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-08-07 11:15:34,170 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 11:15:34,170 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-08-07 11:15:34,170 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-08-07 11:15:34,170 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-08-07 11:15:34,171 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-08-07 11:15:34,171 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-08-07 11:15:34,171 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-08-07 11:15:34,171 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-08-07 11:15:34,172 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-08-07 11:15:34,172 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-08-07 11:15:34,251 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-08-07 11:15:34,265 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-08-07 11:15:34,269 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-08-07 11:15:34,271 INFO L271 PluginConnector]: Initializing CDTParser... [2018-08-07 11:15:34,271 INFO L276 PluginConnector]: CDTParser initialized [2018-08-07 11:15:34,272 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label48_true-unreach-call.c [2018-08-07 11:15:34,628 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/569a8b863/6ca9710ca3804deb942284b54e28b02a/FLAG1cf9aa96c [2018-08-07 11:15:35,121 INFO L276 CDTParser]: Found 1 translation units. [2018-08-07 11:15:35,122 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label48_true-unreach-call.c [2018-08-07 11:15:35,163 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/569a8b863/6ca9710ca3804deb942284b54e28b02a/FLAG1cf9aa96c [2018-08-07 11:15:35,186 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/569a8b863/6ca9710ca3804deb942284b54e28b02a [2018-08-07 11:15:35,199 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-08-07 11:15:35,201 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-08-07 11:15:35,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-08-07 11:15:35,202 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-08-07 11:15:35,209 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-08-07 11:15:35,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 11:15:35" (1/1) ... [2018-08-07 11:15:35,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e9e394b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:15:35, skipping insertion in model container [2018-08-07 11:15:35,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 11:15:35" (1/1) ... [2018-08-07 11:15:35,595 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-08-07 11:15:36,716 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 11:15:36,735 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-08-07 11:15:37,573 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 11:15:37,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:15:37 WrapperNode [2018-08-07 11:15:37,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-08-07 11:15:37,714 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-08-07 11:15:37,715 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-08-07 11:15:37,715 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-08-07 11:15:37,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:15:37" (1/1) ... [2018-08-07 11:15:37,788 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:15:37" (1/1) ... [2018-08-07 11:15:37,860 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-08-07 11:15:37,861 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-08-07 11:15:37,861 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-08-07 11:15:37,861 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-08-07 11:15:38,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:15:37" (1/1) ... [2018-08-07 11:15:38,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:15:37" (1/1) ... [2018-08-07 11:15:38,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:15:37" (1/1) ... [2018-08-07 11:15:38,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:15:37" (1/1) ... [2018-08-07 11:15:38,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:15:37" (1/1) ... [2018-08-07 11:15:38,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:15:37" (1/1) ... [2018-08-07 11:15:38,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:15:37" (1/1) ... [2018-08-07 11:15:38,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-08-07 11:15:38,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-08-07 11:15:38,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-08-07 11:15:38,469 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-08-07 11:15:38,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:15:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 11:15:38,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-08-07 11:15:38,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-08-07 11:15:38,549 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-08-07 11:15:38,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-08-07 11:15:38,549 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output3 [2018-08-07 11:15:38,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output3 [2018-08-07 11:15:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-08-07 11:15:38,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-08-07 11:15:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4 [2018-08-07 11:15:38,550 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4 [2018-08-07 11:15:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-08-07 11:15:38,551 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-08-07 11:15:38,551 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-08-07 11:15:38,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-08-07 11:15:50,682 INFO L273 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-08-07 11:15:50,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 11:15:50 BoogieIcfgContainer [2018-08-07 11:15:50,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-08-07 11:15:50,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-08-07 11:15:50,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-08-07 11:15:50,687 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-08-07 11:15:50,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.08 11:15:35" (1/3) ... [2018-08-07 11:15:50,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e8c6b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 11:15:50, skipping insertion in model container [2018-08-07 11:15:50,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 11:15:37" (2/3) ... [2018-08-07 11:15:50,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e8c6b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 11:15:50, skipping insertion in model container [2018-08-07 11:15:50,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 11:15:50" (3/3) ... [2018-08-07 11:15:50,691 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem04_label48_true-unreach-call.c [2018-08-07 11:15:50,700 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-08-07 11:15:50,711 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-08-07 11:15:50,786 INFO L129 ementStrategyFactory]: Using default assertion order modulation [2018-08-07 11:15:50,787 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-08-07 11:15:50,787 INFO L382 AbstractCegarLoop]: Hoare is true [2018-08-07 11:15:50,787 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-08-07 11:15:50,787 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-08-07 11:15:50,788 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-08-07 11:15:50,788 INFO L386 AbstractCegarLoop]: Difference is false [2018-08-07 11:15:50,788 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-08-07 11:15:50,788 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-08-07 11:15:50,842 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states. [2018-08-07 11:15:50,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2018-08-07 11:15:50,895 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:15:50,897 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 11:15:50,898 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 11:15:50,904 INFO L82 PathProgramCache]: Analyzing trace with hash 682189020, now seen corresponding path program 1 times [2018-08-07 11:15:50,907 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:15:50,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:15:50,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:15:50,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:15:50,966 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:15:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:15:52,961 WARN L170 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 11:15:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:15:53,939 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 11:15:53,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-08-07 11:15:53,940 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 11:15:53,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 11:15:53,964 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 11:15:53,965 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 11:15:53,967 INFO L87 Difference]: Start difference. First operand 907 states. Second operand 3 states. [2018-08-07 11:16:01,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:16:01,178 INFO L93 Difference]: Finished difference Result 2647 states and 5102 transitions. [2018-08-07 11:16:01,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 11:16:01,180 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 819 [2018-08-07 11:16:01,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:16:01,225 INFO L225 Difference]: With dead ends: 2647 [2018-08-07 11:16:01,226 INFO L226 Difference]: Without dead ends: 1738 [2018-08-07 11:16:01,235 INFO L603 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 [2018-08-07 11:16:01,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2018-08-07 11:16:01,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1738. [2018-08-07 11:16:01,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1738 states. [2018-08-07 11:16:01,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 3169 transitions. [2018-08-07 11:16:01,402 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 3169 transitions. Word has length 819 [2018-08-07 11:16:01,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:16:01,406 INFO L480 AbstractCegarLoop]: Abstraction has 1738 states and 3169 transitions. [2018-08-07 11:16:01,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 11:16:01,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 3169 transitions. [2018-08-07 11:16:01,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2018-08-07 11:16:01,489 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:16:01,490 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 11:16:01,491 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 11:16:01,491 INFO L82 PathProgramCache]: Analyzing trace with hash 101417817, now seen corresponding path program 1 times [2018-08-07 11:16:01,492 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:16:01,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:16:01,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:16:01,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:16:01,493 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:16:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:16:02,766 WARN L170 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-08-07 11:16:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:16:03,582 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:16:03,582 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 11:16:03,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:16:03,598 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:16:03,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:16:04,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:16:05,030 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:16:05,031 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:16:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:16:06,118 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-08-07 11:16:06,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-08-07 11:16:06,119 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 11:16:06,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 11:16:06,125 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 11:16:06,125 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-08-07 11:16:06,125 INFO L87 Difference]: Start difference. First operand 1738 states and 3169 transitions. Second operand 3 states. [2018-08-07 11:16:12,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:16:12,623 INFO L93 Difference]: Finished difference Result 5140 states and 9490 transitions. [2018-08-07 11:16:12,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 11:16:12,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 839 [2018-08-07 11:16:12,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:16:12,651 INFO L225 Difference]: With dead ends: 5140 [2018-08-07 11:16:12,651 INFO L226 Difference]: Without dead ends: 3408 [2018-08-07 11:16:12,658 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1691 GetRequests, 1678 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-08-07 11:16:12,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2018-08-07 11:16:12,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 3408. [2018-08-07 11:16:12,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3408 states. [2018-08-07 11:16:12,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3408 states to 3408 states and 5907 transitions. [2018-08-07 11:16:12,749 INFO L78 Accepts]: Start accepts. Automaton has 3408 states and 5907 transitions. Word has length 839 [2018-08-07 11:16:12,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:16:12,751 INFO L480 AbstractCegarLoop]: Abstraction has 3408 states and 5907 transitions. [2018-08-07 11:16:12,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 11:16:12,751 INFO L276 IsEmpty]: Start isEmpty. Operand 3408 states and 5907 transitions. [2018-08-07 11:16:12,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 842 [2018-08-07 11:16:12,783 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:16:12,784 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 11:16:12,784 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 11:16:12,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1017956771, now seen corresponding path program 1 times [2018-08-07 11:16:12,785 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:16:12,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:16:12,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:16:12,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:16:12,789 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:16:12,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:16:13,123 WARN L170 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-08-07 11:16:13,472 WARN L170 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-08-07 11:16:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:16:14,212 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 11:16:14,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-08-07 11:16:14,213 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 11:16:14,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-08-07 11:16:14,216 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-08-07 11:16:14,216 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-08-07 11:16:14,216 INFO L87 Difference]: Start difference. First operand 3408 states and 5907 transitions. Second operand 7 states. [2018-08-07 11:16:14,422 WARN L170 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-08-07 11:16:25,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:16:25,536 INFO L93 Difference]: Finished difference Result 8740 states and 15234 transitions. [2018-08-07 11:16:25,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-08-07 11:16:25,539 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 841 [2018-08-07 11:16:25,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:16:25,579 INFO L225 Difference]: With dead ends: 8740 [2018-08-07 11:16:25,579 INFO L226 Difference]: Without dead ends: 5338 [2018-08-07 11:16:25,590 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-08-07 11:16:25,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5338 states. [2018-08-07 11:16:25,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5338 to 5223. [2018-08-07 11:16:25,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5223 states. [2018-08-07 11:16:25,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5223 states to 5223 states and 8604 transitions. [2018-08-07 11:16:25,772 INFO L78 Accepts]: Start accepts. Automaton has 5223 states and 8604 transitions. Word has length 841 [2018-08-07 11:16:25,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:16:25,773 INFO L480 AbstractCegarLoop]: Abstraction has 5223 states and 8604 transitions. [2018-08-07 11:16:25,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-08-07 11:16:25,774 INFO L276 IsEmpty]: Start isEmpty. Operand 5223 states and 8604 transitions. [2018-08-07 11:16:25,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 858 [2018-08-07 11:16:25,801 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:16:25,802 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 11:16:25,802 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 11:16:25,803 INFO L82 PathProgramCache]: Analyzing trace with hash 634785060, now seen corresponding path program 1 times [2018-08-07 11:16:25,803 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:16:25,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:16:25,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:16:25,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:16:25,807 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:16:25,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:16:26,295 WARN L170 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 7 [2018-08-07 11:16:26,598 WARN L170 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-08-07 11:16:27,411 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:16:27,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:16:27,411 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 11:16:27,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:16:27,420 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:16:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:16:27,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:16:28,374 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:16:28,375 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:16:29,016 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:16:29,163 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:16:29,163 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 11:16:29,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:16:29,182 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:16:29,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:16:29,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:16:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:16:30,643 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:16:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:16:31,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 11:16:31,130 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 16 [2018-08-07 11:16:31,131 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 11:16:31,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-08-07 11:16:31,133 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-08-07 11:16:31,133 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2018-08-07 11:16:31,134 INFO L87 Difference]: Start difference. First operand 5223 states and 8604 transitions. Second operand 10 states. [2018-08-07 11:16:41,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:16:41,341 INFO L93 Difference]: Finished difference Result 16353 states and 28863 transitions. [2018-08-07 11:16:41,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-08-07 11:16:41,341 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 857 [2018-08-07 11:16:41,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:16:41,400 INFO L225 Difference]: With dead ends: 16353 [2018-08-07 11:16:41,400 INFO L226 Difference]: Without dead ends: 11136 [2018-08-07 11:16:41,419 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 3448 GetRequests, 3419 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2018-08-07 11:16:41,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11136 states. [2018-08-07 11:16:41,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11136 to 10801. [2018-08-07 11:16:41,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10801 states. [2018-08-07 11:16:41,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10801 states to 10801 states and 16239 transitions. [2018-08-07 11:16:41,735 INFO L78 Accepts]: Start accepts. Automaton has 10801 states and 16239 transitions. Word has length 857 [2018-08-07 11:16:41,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:16:41,735 INFO L480 AbstractCegarLoop]: Abstraction has 10801 states and 16239 transitions. [2018-08-07 11:16:41,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-08-07 11:16:41,736 INFO L276 IsEmpty]: Start isEmpty. Operand 10801 states and 16239 transitions. [2018-08-07 11:16:41,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2018-08-07 11:16:41,776 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:16:41,777 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 11:16:41,777 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 11:16:41,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1803286543, now seen corresponding path program 1 times [2018-08-07 11:16:41,777 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:16:41,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:16:41,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:16:41,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:16:41,779 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:16:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:16:42,732 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 75 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-08-07 11:16:42,732 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:16:42,732 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 11:16:42,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:16:42,749 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:16:43,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:16:43,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:16:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-08-07 11:16:43,815 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:16:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-08-07 11:16:44,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:16:44,468 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 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 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 11:16:44,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:16:44,484 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:16:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:16:45,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:16:46,301 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-08-07 11:16:46,302 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:16:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-08-07 11:16:46,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 11:16:46,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-08-07 11:16:46,813 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 11:16:46,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 11:16:46,815 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 11:16:46,815 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-08-07 11:16:46,816 INFO L87 Difference]: Start difference. First operand 10801 states and 16239 transitions. Second operand 9 states. [2018-08-07 11:17:06,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:17:06,297 INFO L93 Difference]: Finished difference Result 42937 states and 75683 transitions. [2018-08-07 11:17:06,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-08-07 11:17:06,297 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 884 [2018-08-07 11:17:06,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:17:06,472 INFO L225 Difference]: With dead ends: 42937 [2018-08-07 11:17:06,473 INFO L226 Difference]: Without dead ends: 32142 [2018-08-07 11:17:06,530 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 3584 GetRequests, 3544 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=320, Invalid=1240, Unknown=0, NotChecked=0, Total=1560 [2018-08-07 11:17:06,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32142 states. [2018-08-07 11:17:07,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32142 to 31575. [2018-08-07 11:17:07,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31575 states. [2018-08-07 11:17:07,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31575 states to 31575 states and 43803 transitions. [2018-08-07 11:17:07,402 INFO L78 Accepts]: Start accepts. Automaton has 31575 states and 43803 transitions. Word has length 884 [2018-08-07 11:17:07,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:17:07,402 INFO L480 AbstractCegarLoop]: Abstraction has 31575 states and 43803 transitions. [2018-08-07 11:17:07,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 11:17:07,403 INFO L276 IsEmpty]: Start isEmpty. Operand 31575 states and 43803 transitions. [2018-08-07 11:17:07,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 993 [2018-08-07 11:17:07,515 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:17:07,516 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-08-07 11:17:07,517 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 11:17:07,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1637878917, now seen corresponding path program 1 times [2018-08-07 11:17:07,517 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:17:07,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:17:07,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:17:07,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:17:07,519 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:17:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:17:07,875 WARN L170 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 11:17:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 164 proven. 92 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-08-07 11:17:08,885 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:17:08,885 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 11:17:08,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:17:08,900 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:17:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:17:09,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:17:10,148 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2018-08-07 11:17:10,148 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:17:10,686 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 164 proven. 92 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-08-07 11:17:10,708 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 11:17:10,709 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-08-07 11:17:10,709 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 11:17:10,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 11:17:10,710 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 11:17:10,710 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-08-07 11:17:10,711 INFO L87 Difference]: Start difference. First operand 31575 states and 43803 transitions. Second operand 5 states. [2018-08-07 11:17:17,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:17:17,748 INFO L93 Difference]: Finished difference Result 80208 states and 114364 transitions. [2018-08-07 11:17:17,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 11:17:17,750 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 992 [2018-08-07 11:17:17,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:17:17,918 INFO L225 Difference]: With dead ends: 80208 [2018-08-07 11:17:17,918 INFO L226 Difference]: Without dead ends: 48639 [2018-08-07 11:17:17,987 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1993 GetRequests, 1978 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2018-08-07 11:17:18,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48639 states. [2018-08-07 11:17:18,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48639 to 45956. [2018-08-07 11:17:18,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45956 states. [2018-08-07 11:17:18,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45956 states to 45956 states and 60151 transitions. [2018-08-07 11:17:18,904 INFO L78 Accepts]: Start accepts. Automaton has 45956 states and 60151 transitions. Word has length 992 [2018-08-07 11:17:18,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:17:18,905 INFO L480 AbstractCegarLoop]: Abstraction has 45956 states and 60151 transitions. [2018-08-07 11:17:18,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 11:17:18,905 INFO L276 IsEmpty]: Start isEmpty. Operand 45956 states and 60151 transitions. [2018-08-07 11:17:18,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1153 [2018-08-07 11:17:18,985 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:17:18,986 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-08-07 11:17:18,986 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 11:17:18,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1261293619, now seen corresponding path program 1 times [2018-08-07 11:17:18,987 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:17:18,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:17:18,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:17:18,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:17:18,988 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:17:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:17:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 351 proven. 129 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-08-07 11:17:20,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:17:20,544 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 11:17:20,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:17:20,555 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:17:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:17:21,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:17:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 432 proven. 2 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2018-08-07 11:17:21,995 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:17:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 432 proven. 2 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2018-08-07 11:17:22,819 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:17:22,820 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 11:17:22,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:17:22,839 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:17:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:17:23,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:17:24,962 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 525 proven. 6 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-08-07 11:17:24,962 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:17:25,812 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 527 proven. 4 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-08-07 11:17:25,815 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 11:17:25,817 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-08-07 11:17:25,817 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 11:17:25,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 11:17:25,818 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 11:17:25,819 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-08-07 11:17:25,819 INFO L87 Difference]: Start difference. First operand 45956 states and 60151 transitions. Second operand 9 states. [2018-08-07 11:17:45,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:17:45,424 INFO L93 Difference]: Finished difference Result 158440 states and 224374 transitions. [2018-08-07 11:17:45,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-08-07 11:17:45,424 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1152 [2018-08-07 11:17:45,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:17:45,818 INFO L225 Difference]: With dead ends: 158440 [2018-08-07 11:17:45,819 INFO L226 Difference]: Without dead ends: 112490 [2018-08-07 11:17:45,947 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 4666 GetRequests, 4623 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=365, Invalid=1441, Unknown=0, NotChecked=0, Total=1806 [2018-08-07 11:17:46,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112490 states. [2018-08-07 11:17:48,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112490 to 109335. [2018-08-07 11:17:48,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109335 states. [2018-08-07 11:17:48,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109335 states to 109335 states and 138343 transitions. [2018-08-07 11:17:48,445 INFO L78 Accepts]: Start accepts. Automaton has 109335 states and 138343 transitions. Word has length 1152 [2018-08-07 11:17:48,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:17:48,446 INFO L480 AbstractCegarLoop]: Abstraction has 109335 states and 138343 transitions. [2018-08-07 11:17:48,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 11:17:48,447 INFO L276 IsEmpty]: Start isEmpty. Operand 109335 states and 138343 transitions. [2018-08-07 11:17:48,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1163 [2018-08-07 11:17:48,577 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:17:48,578 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 11:17:48,578 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 11:17:48,578 INFO L82 PathProgramCache]: Analyzing trace with hash -329497591, now seen corresponding path program 1 times [2018-08-07 11:17:48,579 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:17:48,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:17:48,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:17:48,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:17:48,580 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:17:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:17:49,332 WARN L170 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-08-07 11:17:49,627 WARN L170 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-08-07 11:17:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 388 proven. 50 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2018-08-07 11:17:51,121 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:17:51,121 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 11:17:51,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:17:51,129 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:17:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:17:51,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:17:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 527 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-08-07 11:17:52,706 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:17:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 527 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-08-07 11:17:53,433 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:17:53,433 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 11:17:53,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:17:53,454 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:17:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:17:54,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:17:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 527 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-08-07 11:17:55,467 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:17:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 527 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-08-07 11:17:56,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 11:17:56,494 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 16 [2018-08-07 11:17:56,495 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 11:17:56,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-08-07 11:17:56,496 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-08-07 11:17:56,497 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2018-08-07 11:17:56,497 INFO L87 Difference]: Start difference. First operand 109335 states and 138343 transitions. Second operand 10 states. [2018-08-07 11:18:13,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:18:13,780 INFO L93 Difference]: Finished difference Result 218727 states and 285310 transitions. [2018-08-07 11:18:13,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-08-07 11:18:13,781 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1162 [2018-08-07 11:18:13,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:18:14,122 INFO L225 Difference]: With dead ends: 218727 [2018-08-07 11:18:14,123 INFO L226 Difference]: Without dead ends: 110233 [2018-08-07 11:18:14,275 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 4760 GetRequests, 4690 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=848, Invalid=3982, Unknown=0, NotChecked=0, Total=4830 [2018-08-07 11:18:14,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110233 states. [2018-08-07 11:18:15,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110233 to 109073. [2018-08-07 11:18:15,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109073 states. [2018-08-07 11:18:15,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109073 states to 109073 states and 130543 transitions. [2018-08-07 11:18:15,988 INFO L78 Accepts]: Start accepts. Automaton has 109073 states and 130543 transitions. Word has length 1162 [2018-08-07 11:18:15,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:18:15,988 INFO L480 AbstractCegarLoop]: Abstraction has 109073 states and 130543 transitions. [2018-08-07 11:18:15,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-08-07 11:18:15,989 INFO L276 IsEmpty]: Start isEmpty. Operand 109073 states and 130543 transitions. [2018-08-07 11:18:16,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1480 [2018-08-07 11:18:16,778 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:18:16,779 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 11:18:16,779 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 11:18:16,780 INFO L82 PathProgramCache]: Analyzing trace with hash -2139798137, now seen corresponding path program 1 times [2018-08-07 11:18:16,781 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:18:16,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:18:16,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:18:16,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:18:16,782 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:18:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:18:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1454 backedges. 979 proven. 336 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2018-08-07 11:18:23,121 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:18:23,121 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 11:18:23,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:18:23,129 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:18:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:18:23,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:18:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1454 backedges. 1038 proven. 2 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2018-08-07 11:18:24,942 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:18:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1454 backedges. 1038 proven. 2 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2018-08-07 11:18:26,164 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:18:26,164 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 11:18:26,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:18:26,180 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:18:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:18:27,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:18:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1454 backedges. 1038 proven. 2 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2018-08-07 11:18:28,347 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:18:29,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1454 backedges. 1038 proven. 2 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2018-08-07 11:18:29,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 11:18:29,385 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5, 5, 5] total 25 [2018-08-07 11:18:29,385 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 11:18:29,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-08-07 11:18:29,387 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-08-07 11:18:29,387 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2018-08-07 11:18:29,388 INFO L87 Difference]: Start difference. First operand 109073 states and 130543 transitions. Second operand 19 states. [2018-08-07 11:18:29,706 WARN L170 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2018-08-07 11:18:30,062 WARN L170 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2018-08-07 11:18:31,099 WARN L170 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2018-08-07 11:18:31,383 WARN L170 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2018-08-07 11:18:31,880 WARN L170 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2018-08-07 11:18:32,732 WARN L170 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2018-08-07 11:18:34,299 WARN L170 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2018-08-07 11:18:35,338 WARN L170 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2018-08-07 11:18:35,936 WARN L170 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2018-08-07 11:18:37,094 WARN L170 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2018-08-07 11:18:38,518 WARN L170 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2018-08-07 11:18:39,498 WARN L170 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2018-08-07 11:18:40,080 WARN L170 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-08-07 11:18:40,357 WARN L170 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 41 [2018-08-07 11:18:40,712 WARN L170 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-08-07 11:18:42,138 WARN L170 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2018-08-07 11:18:42,705 WARN L170 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2018-08-07 11:18:43,712 WARN L170 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2018-08-07 11:18:45,692 WARN L170 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2018-08-07 11:18:47,518 WARN L170 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2018-08-07 11:18:49,713 WARN L170 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2018-08-07 11:18:50,301 WARN L170 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2018-08-07 11:18:53,046 WARN L170 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2018-08-07 11:18:53,639 WARN L170 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2018-08-07 11:18:54,184 WARN L170 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2018-08-07 11:18:54,334 WARN L170 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2018-08-07 11:18:54,541 WARN L170 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2018-08-07 11:18:54,785 WARN L170 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2018-08-07 11:18:55,087 WARN L170 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2018-08-07 11:18:55,709 WARN L170 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2018-08-07 11:18:56,768 WARN L170 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2018-08-07 11:18:57,052 WARN L170 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2018-08-07 11:18:57,744 WARN L170 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2018-08-07 11:18:59,011 WARN L170 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2018-08-07 11:18:59,864 WARN L170 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2018-08-07 11:19:00,580 WARN L170 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2018-08-07 11:19:01,715 WARN L170 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2018-08-07 11:19:02,208 WARN L170 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2018-08-07 11:19:03,364 WARN L170 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-08-07 11:19:03,590 WARN L170 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2018-08-07 11:19:04,020 WARN L170 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2018-08-07 11:19:05,018 WARN L170 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2018-08-07 11:19:06,336 WARN L170 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2018-08-07 11:19:08,646 WARN L170 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2018-08-07 11:19:09,504 WARN L170 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2018-08-07 11:19:10,712 WARN L170 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2018-08-07 11:19:10,954 WARN L170 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2018-08-07 11:19:12,558 WARN L170 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2018-08-07 11:19:14,398 WARN L170 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2018-08-07 11:19:14,873 WARN L170 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2018-08-07 11:19:15,417 WARN L170 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2018-08-07 11:19:15,869 WARN L170 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 Received shutdown request... [2018-08-07 11:19:16,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-08-07 11:19:16,199 WARN L549 AbstractCegarLoop]: Verification canceled [2018-08-07 11:19:16,204 WARN L202 ceAbstractionStarter]: Timeout [2018-08-07 11:19:16,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.08 11:19:16 BoogieIcfgContainer [2018-08-07 11:19:16,205 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-08-07 11:19:16,205 INFO L168 Benchmark]: Toolchain (without parser) took 221005.95 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 2.8 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. [2018-08-07 11:19:16,206 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-08-07 11:19:16,207 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2511.98 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. [2018-08-07 11:19:16,208 INFO L168 Benchmark]: Boogie Procedure Inliner took 146.14 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. [2018-08-07 11:19:16,208 INFO L168 Benchmark]: Boogie Preprocessor took 607.91 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 841.5 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 85.1 MB. Max. memory is 7.1 GB. [2018-08-07 11:19:16,209 INFO L168 Benchmark]: RCFGBuilder took 12213.80 ms. Allocated memory was 2.4 GB in the beginning and 2.5 GB in the end (delta: 163.6 MB). Free memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: -47.0 MB). Peak memory consumption was 705.3 MB. Max. memory is 7.1 GB. [2018-08-07 11:19:16,210 INFO L168 Benchmark]: TraceAbstraction took 205521.08 ms. Allocated memory was 2.5 GB in the beginning and 3.9 GB in the end (delta: 1.4 GB). Free memory was 2.3 GB in the beginning and 2.8 GB in the end (delta: -473.4 MB). Peak memory consumption was 939.0 MB. Max. memory is 7.1 GB. [2018-08-07 11:19:16,214 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2511.98 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 146.14 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 607.91 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 841.5 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 85.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 12213.80 ms. Allocated memory was 2.4 GB in the beginning and 2.5 GB in the end (delta: 163.6 MB). Free memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: -47.0 MB). Peak memory consumption was 705.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 205521.08 ms. Allocated memory was 2.5 GB in the beginning and 3.9 GB in the end (delta: 1.4 GB). Free memory was 2.3 GB in the beginning and 2.8 GB in the end (delta: -473.4 MB). Peak memory consumption was 939.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 4775]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 4775). Cancelled while BasicCegarLoop was constructing difference of abstraction (109073states) and FLOYD_HOARE automaton (currently 87 states, 19 states before enhancement), while ReachableStatesComputation was computing reachable states (51986 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 907 locations, 1 error locations. TIMEOUT Result, 205.4s OverallTime, 9 OverallIterations, 6 TraceHistogramMax, 147.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1727 SDtfs, 52594 SDslu, 3413 SDs, 0 SdLazy, 84981 SolverSat, 28588 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 105.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26233 GetRequests, 25899 SyntacticMatches, 26 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6295 ImplicationChecksByTransitivity, 24.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109335occurred in iteration=7, 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: 6.7s AutomataMinimizationTime, 8 MinimizatonAttempts, 8015 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.2s SsaConstructionTime, 8.0s SatisfiabilityAnalysisTime, 29.4s InterpolantComputationTime, 21924 NumberOfCodeBlocks, 21924 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 34790 ConstructedInterpolants, 0 QuantifiedInterpolants, 77973488 SizeOfPredicates, 6 NumberOfNonLiveVariables, 18435 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 33 InterpolantComputations, 5 PerfectInterpolantSequences, 14296/15065 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_label48_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-08-07_11-19-16-229.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem04_label48_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-08-07_11-19-16-229.csv Completed graceful shutdown