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/Problem03_label01_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ddc4263 [2018-08-07 10:59:43,145 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-08-07 10:59:43,147 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-08-07 10:59:43,159 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-08-07 10:59:43,159 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-08-07 10:59:43,160 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-08-07 10:59:43,162 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-08-07 10:59:43,163 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-08-07 10:59:43,165 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-08-07 10:59:43,166 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-08-07 10:59:43,167 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-08-07 10:59:43,167 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-08-07 10:59:43,168 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-08-07 10:59:43,169 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-08-07 10:59:43,170 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-08-07 10:59:43,171 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-08-07 10:59:43,172 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-08-07 10:59:43,173 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-08-07 10:59:43,175 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-08-07 10:59:43,177 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-08-07 10:59:43,178 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-08-07 10:59:43,179 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-08-07 10:59:43,182 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-08-07 10:59:43,182 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-08-07 10:59:43,182 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-08-07 10:59:43,183 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-08-07 10:59:43,184 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-08-07 10:59:43,185 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-08-07 10:59:43,186 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-08-07 10:59:43,187 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-08-07 10:59:43,187 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-08-07 10:59:43,188 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-08-07 10:59:43,188 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-08-07 10:59:43,189 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-08-07 10:59:43,190 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-08-07 10:59:43,190 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-08-07 10:59:43,191 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 10:59:43,209 INFO L110 SettingsManager]: Loading preferences was successful [2018-08-07 10:59:43,210 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-08-07 10:59:43,210 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-08-07 10:59:43,211 INFO L133 SettingsManager]: * User list type=DISABLED [2018-08-07 10:59:43,211 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-08-07 10:59:43,211 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-08-07 10:59:43,211 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-08-07 10:59:43,211 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-08-07 10:59:43,212 INFO L133 SettingsManager]: * Log string format=TERM [2018-08-07 10:59:43,212 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-08-07 10:59:43,212 INFO L133 SettingsManager]: * Interval Domain=false [2018-08-07 10:59:43,213 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-08-07 10:59:43,213 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-08-07 10:59:43,213 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-08-07 10:59:43,213 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-08-07 10:59:43,213 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-08-07 10:59:43,214 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-08-07 10:59:43,214 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-08-07 10:59:43,214 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-08-07 10:59:43,214 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-08-07 10:59:43,214 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-08-07 10:59:43,215 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-08-07 10:59:43,215 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-08-07 10:59:43,215 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 10:59:43,215 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-08-07 10:59:43,215 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-08-07 10:59:43,216 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-08-07 10:59:43,216 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-08-07 10:59:43,216 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-08-07 10:59:43,216 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-08-07 10:59:43,216 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-08-07 10:59:43,217 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-08-07 10:59:43,217 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-08-07 10:59:43,273 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-08-07 10:59:43,286 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-08-07 10:59:43,290 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-08-07 10:59:43,292 INFO L271 PluginConnector]: Initializing CDTParser... [2018-08-07 10:59:43,292 INFO L276 PluginConnector]: CDTParser initialized [2018-08-07 10:59:43,293 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label01_true-unreach-call.c [2018-08-07 10:59:43,642 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c04e42b1b/319c5e8fcde84883ae1c177b2288d29c/FLAGa3c0459c4 [2018-08-07 10:59:44,015 INFO L276 CDTParser]: Found 1 translation units. [2018-08-07 10:59:44,017 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label01_true-unreach-call.c [2018-08-07 10:59:44,045 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c04e42b1b/319c5e8fcde84883ae1c177b2288d29c/FLAGa3c0459c4 [2018-08-07 10:59:44,068 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c04e42b1b/319c5e8fcde84883ae1c177b2288d29c [2018-08-07 10:59:44,082 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-08-07 10:59:44,085 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-08-07 10:59:44,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-08-07 10:59:44,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-08-07 10:59:44,096 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-08-07 10:59:44,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 10:59:44" (1/1) ... [2018-08-07 10:59:44,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e55bb73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 10:59:44, skipping insertion in model container [2018-08-07 10:59:44,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 10:59:44" (1/1) ... [2018-08-07 10:59:44,323 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-08-07 10:59:44,809 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 10:59:44,827 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-08-07 10:59:45,111 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 10:59:45,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 10:59:45 WrapperNode [2018-08-07 10:59:45,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-08-07 10:59:45,183 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-08-07 10:59:45,183 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-08-07 10:59:45,183 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-08-07 10:59:45,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 10:59:45" (1/1) ... [2018-08-07 10:59:45,233 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 10:59:45" (1/1) ... [2018-08-07 10:59:45,367 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-08-07 10:59:45,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-08-07 10:59:45,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-08-07 10:59:45,368 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-08-07 10:59:45,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 10:59:45" (1/1) ... [2018-08-07 10:59:45,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 10:59:45" (1/1) ... [2018-08-07 10:59:45,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 10:59:45" (1/1) ... [2018-08-07 10:59:45,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 10:59:45" (1/1) ... [2018-08-07 10:59:45,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 10:59:45" (1/1) ... [2018-08-07 10:59:45,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 10:59:45" (1/1) ... [2018-08-07 10:59:45,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 10:59:45" (1/1) ... [2018-08-07 10:59:45,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-08-07 10:59:45,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-08-07 10:59:45,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-08-07 10:59:45,742 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-08-07 10:59:45,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 10:59:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 10:59:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-08-07 10:59:45,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-08-07 10:59:45,814 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 10:59:45,814 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 10:59:45,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-08-07 10:59:45,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-08-07 10:59:45,815 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-08-07 10:59:45,815 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-08-07 10:59:50,519 INFO L273 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-08-07 10:59:50,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 10:59:50 BoogieIcfgContainer [2018-08-07 10:59:50,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-08-07 10:59:50,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-08-07 10:59:50,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-08-07 10:59:50,531 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-08-07 10:59:50,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.08 10:59:44" (1/3) ... [2018-08-07 10:59:50,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39cffacd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 10:59:50, skipping insertion in model container [2018-08-07 10:59:50,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 10:59:45" (2/3) ... [2018-08-07 10:59:50,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39cffacd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 10:59:50, skipping insertion in model container [2018-08-07 10:59:50,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 10:59:50" (3/3) ... [2018-08-07 10:59:50,539 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label01_true-unreach-call.c [2018-08-07 10:59:50,548 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-08-07 10:59:50,558 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-08-07 10:59:50,615 INFO L129 ementStrategyFactory]: Using default assertion order modulation [2018-08-07 10:59:50,616 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-08-07 10:59:50,616 INFO L382 AbstractCegarLoop]: Hoare is true [2018-08-07 10:59:50,617 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-08-07 10:59:50,617 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-08-07 10:59:50,617 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-08-07 10:59:50,617 INFO L386 AbstractCegarLoop]: Difference is false [2018-08-07 10:59:50,617 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-08-07 10:59:50,618 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-08-07 10:59:50,648 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-08-07 10:59:50,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-08-07 10:59:50,674 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 10:59:50,675 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] [2018-08-07 10:59:50,677 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 10:59:50,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1178454204, now seen corresponding path program 1 times [2018-08-07 10:59:50,688 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 10:59:50,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 10:59:50,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 10:59:50,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 10:59:50,736 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 10:59:51,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 10:59:51,626 WARN L170 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 10:59:51,842 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 10:59:51,845 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 10:59:51,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-08-07 10:59:51,845 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 10:59:51,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 10:59:51,872 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 10:59:51,872 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 10:59:51,876 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-08-07 10:59:53,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 10:59:53,944 INFO L93 Difference]: Finished difference Result 844 states and 1489 transitions. [2018-08-07 10:59:53,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 10:59:53,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 193 [2018-08-07 10:59:53,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 10:59:53,970 INFO L225 Difference]: With dead ends: 844 [2018-08-07 10:59:53,970 INFO L226 Difference]: Without dead ends: 530 [2018-08-07 10:59:53,977 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 10:59:53,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2018-08-07 10:59:54,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 525. [2018-08-07 10:59:54,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2018-08-07 10:59:54,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 865 transitions. [2018-08-07 10:59:54,088 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 865 transitions. Word has length 193 [2018-08-07 10:59:54,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 10:59:54,092 INFO L480 AbstractCegarLoop]: Abstraction has 525 states and 865 transitions. [2018-08-07 10:59:54,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 10:59:54,093 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 865 transitions. [2018-08-07 10:59:54,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-08-07 10:59:54,113 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 10:59:54,113 INFO L376 BasicCegarLoop]: trace histogram [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] [2018-08-07 10:59:54,114 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 10:59:54,114 INFO L82 PathProgramCache]: Analyzing trace with hash 851918400, now seen corresponding path program 1 times [2018-08-07 10:59:54,114 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 10:59:54,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 10:59:54,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 10:59:54,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 10:59:54,118 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 10:59:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 10:59:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 10:59:54,688 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 10:59:54,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-08-07 10:59:54,688 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 10:59:54,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 10:59:54,692 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 10:59:54,692 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 10:59:54,693 INFO L87 Difference]: Start difference. First operand 525 states and 865 transitions. Second operand 3 states. [2018-08-07 10:59:56,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 10:59:56,987 INFO L93 Difference]: Finished difference Result 1477 states and 2511 transitions. [2018-08-07 10:59:56,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 10:59:56,987 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 206 [2018-08-07 10:59:56,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 10:59:56,998 INFO L225 Difference]: With dead ends: 1477 [2018-08-07 10:59:56,998 INFO L226 Difference]: Without dead ends: 958 [2018-08-07 10:59:57,001 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 10:59:57,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2018-08-07 10:59:57,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 943. [2018-08-07 10:59:57,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 943 states. [2018-08-07 10:59:57,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1546 transitions. [2018-08-07 10:59:57,065 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1546 transitions. Word has length 206 [2018-08-07 10:59:57,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 10:59:57,065 INFO L480 AbstractCegarLoop]: Abstraction has 943 states and 1546 transitions. [2018-08-07 10:59:57,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 10:59:57,066 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1546 transitions. [2018-08-07 10:59:57,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-08-07 10:59:57,072 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 10:59:57,072 INFO L376 BasicCegarLoop]: trace histogram [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] [2018-08-07 10:59:57,072 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 10:59:57,073 INFO L82 PathProgramCache]: Analyzing trace with hash 584750157, now seen corresponding path program 1 times [2018-08-07 10:59:57,073 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 10:59:57,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 10:59:57,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 10:59:57,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 10:59:57,074 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 10:59:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 10:59:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 10:59:57,463 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 10:59:57,463 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-08-07 10:59:57,464 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 10:59:57,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-08-07 10:59:57,465 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-08-07 10:59:57,465 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-08-07 10:59:57,465 INFO L87 Difference]: Start difference. First operand 943 states and 1546 transitions. Second operand 7 states. [2018-08-07 11:00:00,424 WARN L170 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-08-07 11:00:03,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:00:03,178 INFO L93 Difference]: Finished difference Result 2923 states and 5188 transitions. [2018-08-07 11:00:03,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-08-07 11:00:03,179 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 211 [2018-08-07 11:00:03,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:00:03,204 INFO L225 Difference]: With dead ends: 2923 [2018-08-07 11:00:03,204 INFO L226 Difference]: Without dead ends: 1986 [2018-08-07 11:00:03,209 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-08-07 11:00:03,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2018-08-07 11:00:03,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1885. [2018-08-07 11:00:03,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1885 states. [2018-08-07 11:00:03,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 3120 transitions. [2018-08-07 11:00:03,307 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 3120 transitions. Word has length 211 [2018-08-07 11:00:03,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:00:03,311 INFO L480 AbstractCegarLoop]: Abstraction has 1885 states and 3120 transitions. [2018-08-07 11:00:03,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-08-07 11:00:03,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 3120 transitions. [2018-08-07 11:00:03,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-08-07 11:00:03,321 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:00:03,321 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2018-08-07 11:00:03,321 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 11:00:03,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1555578558, now seen corresponding path program 1 times [2018-08-07 11:00:03,322 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:00:03,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:00:03,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:00:03,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:00:03,324 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:00:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:00:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 11:00:03,791 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:00:03,791 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 11:00:03,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:00:03,807 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:00:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:00:04,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:00:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-08-07 11:00:04,596 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:00:04,822 WARN L170 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-08-07 11:00:04,926 WARN L170 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-08-07 11:00:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 11:00:05,352 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 11:00:05,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-08-07 11:00:05,353 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 11:00:05,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 11:00:05,354 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 11:00:05,354 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-08-07 11:00:05,354 INFO L87 Difference]: Start difference. First operand 1885 states and 3120 transitions. Second operand 5 states. [2018-08-07 11:00:08,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:00:08,587 INFO L93 Difference]: Finished difference Result 6151 states and 10655 transitions. [2018-08-07 11:00:08,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-08-07 11:00:08,596 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 217 [2018-08-07 11:00:08,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:00:08,624 INFO L225 Difference]: With dead ends: 6151 [2018-08-07 11:00:08,624 INFO L226 Difference]: Without dead ends: 4272 [2018-08-07 11:00:08,636 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 429 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-08-07 11:00:08,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4272 states. [2018-08-07 11:00:08,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4272 to 3815. [2018-08-07 11:00:08,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3815 states. [2018-08-07 11:00:08,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3815 states to 3815 states and 6101 transitions. [2018-08-07 11:00:08,776 INFO L78 Accepts]: Start accepts. Automaton has 3815 states and 6101 transitions. Word has length 217 [2018-08-07 11:00:08,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:00:08,776 INFO L480 AbstractCegarLoop]: Abstraction has 3815 states and 6101 transitions. [2018-08-07 11:00:08,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 11:00:08,776 INFO L276 IsEmpty]: Start isEmpty. Operand 3815 states and 6101 transitions. [2018-08-07 11:00:08,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-08-07 11:00:08,791 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:00:08,792 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2018-08-07 11:00:08,792 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 11:00:08,792 INFO L82 PathProgramCache]: Analyzing trace with hash -223286947, now seen corresponding path program 1 times [2018-08-07 11:00:08,792 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:00:08,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:00:08,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:00:08,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:00:08,794 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:00:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:00:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:00:09,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:00:09,019 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 11:00:09,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:00:09,027 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:00:09,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:00:09,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:00:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:00:09,310 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:00:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:00:09,518 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:00:09,518 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 11:00:09,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:00:09,543 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:00:10,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:00:10,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:00:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-08-07 11:00:10,361 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:00:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-08-07 11:00:10,483 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 3 imperfect interpolant sequences. [2018-08-07 11:00:10,484 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 5, 5] total 17 [2018-08-07 11:00:10,484 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 11:00:10,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 11:00:10,485 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 11:00:10,485 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2018-08-07 11:00:10,485 INFO L87 Difference]: Start difference. First operand 3815 states and 6101 transitions. Second operand 5 states. [2018-08-07 11:00:11,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:00:11,437 INFO L93 Difference]: Finished difference Result 11548 states and 19002 transitions. [2018-08-07 11:00:11,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-08-07 11:00:11,438 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 218 [2018-08-07 11:00:11,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:00:11,486 INFO L225 Difference]: With dead ends: 11548 [2018-08-07 11:00:11,486 INFO L226 Difference]: Without dead ends: 7739 [2018-08-07 11:00:11,504 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 877 GetRequests, 860 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2018-08-07 11:00:11,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7739 states. [2018-08-07 11:00:11,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7739 to 7657. [2018-08-07 11:00:11,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7657 states. [2018-08-07 11:00:11,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7657 states to 7657 states and 12370 transitions. [2018-08-07 11:00:11,847 INFO L78 Accepts]: Start accepts. Automaton has 7657 states and 12370 transitions. Word has length 218 [2018-08-07 11:00:11,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:00:11,848 INFO L480 AbstractCegarLoop]: Abstraction has 7657 states and 12370 transitions. [2018-08-07 11:00:11,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 11:00:11,848 INFO L276 IsEmpty]: Start isEmpty. Operand 7657 states and 12370 transitions. [2018-08-07 11:00:11,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-08-07 11:00:11,877 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:00:11,877 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-08-07 11:00:11,878 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 11:00:11,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1292115596, now seen corresponding path program 1 times [2018-08-07 11:00:11,878 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:00:11,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:00:11,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:00:11,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:00:11,880 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:00:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:00:12,357 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:00:12,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:00:12,358 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 11:00:12,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:00:12,369 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:00:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:00:12,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:00:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-08-07 11:00:12,743 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:00:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-08-07 11:00:13,303 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-08-07 11:00:13,303 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2018-08-07 11:00:13,303 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 11:00:13,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 11:00:13,304 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 11:00:13,305 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-08-07 11:00:13,305 INFO L87 Difference]: Start difference. First operand 7657 states and 12370 transitions. Second operand 5 states. [2018-08-07 11:00:14,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:00:14,926 INFO L93 Difference]: Finished difference Result 23147 states and 38731 transitions. [2018-08-07 11:00:14,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-08-07 11:00:14,930 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 227 [2018-08-07 11:00:14,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:00:15,021 INFO L225 Difference]: With dead ends: 23147 [2018-08-07 11:00:15,021 INFO L226 Difference]: Without dead ends: 15496 [2018-08-07 11:00:15,048 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 446 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-08-07 11:00:15,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15496 states. [2018-08-07 11:00:15,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15496 to 15050. [2018-08-07 11:00:15,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15050 states. [2018-08-07 11:00:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15050 states to 15050 states and 24532 transitions. [2018-08-07 11:00:15,493 INFO L78 Accepts]: Start accepts. Automaton has 15050 states and 24532 transitions. Word has length 227 [2018-08-07 11:00:15,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:00:15,494 INFO L480 AbstractCegarLoop]: Abstraction has 15050 states and 24532 transitions. [2018-08-07 11:00:15,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 11:00:15,494 INFO L276 IsEmpty]: Start isEmpty. Operand 15050 states and 24532 transitions. [2018-08-07 11:00:15,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-08-07 11:00:15,548 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:00:15,549 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-08-07 11:00:15,549 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 11:00:15,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1815954702, now seen corresponding path program 1 times [2018-08-07 11:00:15,550 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:00:15,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:00:15,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:00:15,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:00:15,551 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:00:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:00:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:00:16,037 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:00:16,038 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 11:00:16,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:00:16,055 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:00:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:00:16,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:00:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:00:16,782 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:00:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:00:16,928 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:00:16,929 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 11:00:16,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:00:16,960 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:00:17,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:00:17,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:00:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:00:17,648 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:00:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:00:17,751 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 11:00:17,752 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-08-07 11:00:17,752 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 11:00:17,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 11:00:17,753 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 11:00:17,753 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-08-07 11:00:17,754 INFO L87 Difference]: Start difference. First operand 15050 states and 24532 transitions. Second operand 9 states. [2018-08-07 11:00:34,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:00:34,266 INFO L93 Difference]: Finished difference Result 103108 states and 225751 transitions. [2018-08-07 11:00:34,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-08-07 11:00:34,266 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 227 [2018-08-07 11:00:34,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:00:35,245 INFO L225 Difference]: With dead ends: 103108 [2018-08-07 11:00:35,245 INFO L226 Difference]: Without dead ends: 88064 [2018-08-07 11:00:35,421 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 923 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2018-08-07 11:00:35,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88064 states. [2018-08-07 11:00:38,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88064 to 84058. [2018-08-07 11:00:38,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84058 states. [2018-08-07 11:00:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84058 states to 84058 states and 126841 transitions. [2018-08-07 11:00:38,947 INFO L78 Accepts]: Start accepts. Automaton has 84058 states and 126841 transitions. Word has length 227 [2018-08-07 11:00:38,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:00:38,947 INFO L480 AbstractCegarLoop]: Abstraction has 84058 states and 126841 transitions. [2018-08-07 11:00:38,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 11:00:38,948 INFO L276 IsEmpty]: Start isEmpty. Operand 84058 states and 126841 transitions. [2018-08-07 11:00:39,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-08-07 11:00:39,176 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:00:39,177 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-08-07 11:00:39,177 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 11:00:39,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1679896798, now seen corresponding path program 1 times [2018-08-07 11:00:39,178 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:00:39,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:00:39,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:00:39,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:00:39,179 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:00:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:00:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:00:40,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:00:40,219 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 11:00:40,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:00:40,230 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:00:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:00:40,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:00:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-08-07 11:00:40,628 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:00:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-08-07 11:00:41,131 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-08-07 11:00:41,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-08-07 11:00:41,132 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 11:00:41,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 11:00:41,133 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 11:00:41,133 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-08-07 11:00:41,133 INFO L87 Difference]: Start difference. First operand 84058 states and 126841 transitions. Second operand 3 states. [2018-08-07 11:00:44,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:00:44,783 INFO L93 Difference]: Finished difference Result 236729 states and 356959 transitions. [2018-08-07 11:00:44,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 11:00:44,784 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2018-08-07 11:00:44,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:00:45,411 INFO L225 Difference]: With dead ends: 236729 [2018-08-07 11:00:45,412 INFO L226 Difference]: Without dead ends: 152697 [2018-08-07 11:00:45,615 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 464 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-08-07 11:00:45,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152697 states. [2018-08-07 11:00:49,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152697 to 152353. [2018-08-07 11:00:49,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152353 states. [2018-08-07 11:00:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152353 states to 152353 states and 217242 transitions. [2018-08-07 11:00:49,649 INFO L78 Accepts]: Start accepts. Automaton has 152353 states and 217242 transitions. Word has length 233 [2018-08-07 11:00:49,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:00:49,650 INFO L480 AbstractCegarLoop]: Abstraction has 152353 states and 217242 transitions. [2018-08-07 11:00:49,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 11:00:49,650 INFO L276 IsEmpty]: Start isEmpty. Operand 152353 states and 217242 transitions. [2018-08-07 11:00:49,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-08-07 11:00:49,806 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:00:49,806 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:00:49,807 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 11:00:49,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1949366092, now seen corresponding path program 1 times [2018-08-07 11:00:49,807 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:00:49,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:00:49,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:00:49,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:00:49,808 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:00:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:00:50,227 WARN L170 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 11:00:50,950 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:00:50,950 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:00:50,951 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 11:00:50,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:00:50,966 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:00:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:00:51,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:00:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:00:51,356 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:00:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:00:52,610 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-08-07 11:00:52,610 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-08-07 11:00:52,610 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 11:00:52,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 11:00:52,611 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 11:00:52,611 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-08-07 11:00:52,611 INFO L87 Difference]: Start difference. First operand 152353 states and 217242 transitions. Second operand 3 states. [2018-08-07 11:00:55,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:00:55,501 INFO L93 Difference]: Finished difference Result 276623 states and 389788 transitions. [2018-08-07 11:00:55,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 11:00:55,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 239 [2018-08-07 11:00:55,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:00:56,088 INFO L225 Difference]: With dead ends: 276623 [2018-08-07 11:00:56,089 INFO L226 Difference]: Without dead ends: 150242 [2018-08-07 11:00:56,302 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 477 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-08-07 11:00:56,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150242 states. [2018-08-07 11:01:00,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150242 to 149773. [2018-08-07 11:01:00,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149773 states. [2018-08-07 11:01:00,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149773 states to 149773 states and 209029 transitions. [2018-08-07 11:01:00,444 INFO L78 Accepts]: Start accepts. Automaton has 149773 states and 209029 transitions. Word has length 239 [2018-08-07 11:01:00,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:01:00,445 INFO L480 AbstractCegarLoop]: Abstraction has 149773 states and 209029 transitions. [2018-08-07 11:01:00,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 11:01:00,445 INFO L276 IsEmpty]: Start isEmpty. Operand 149773 states and 209029 transitions. [2018-08-07 11:01:00,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-08-07 11:01:00,570 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:01:00,570 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:01:00,570 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 11:01:00,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1873001038, now seen corresponding path program 1 times [2018-08-07 11:01:00,571 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:01:00,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:01:00,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:01:00,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:01:00,572 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:01:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:01:00,943 WARN L170 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 3 [2018-08-07 11:01:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:01:01,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:01:01,367 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 11:01:01,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:01:01,381 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:01:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:01:01,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:01:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:01:01,730 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:01:02,366 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 47 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:01:02,388 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:01:02,388 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 11:01:02,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:01:02,405 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:01:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:01:02,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:01:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:01:03,639 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:01:03,780 WARN L170 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-08-07 11:01:05,688 WARN L170 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2018-08-07 11:01:05,846 WARN L170 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2018-08-07 11:01:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 45 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:01:06,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 11:01:06,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8, 10, 11] total 36 [2018-08-07 11:01:06,827 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 11:01:06,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-08-07 11:01:06,831 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-08-07 11:01:06,831 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2018-08-07 11:01:06,831 INFO L87 Difference]: Start difference. First operand 149773 states and 209029 transitions. Second operand 14 states. [2018-08-07 11:01:29,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:01:29,466 INFO L93 Difference]: Finished difference Result 555277 states and 834049 transitions. [2018-08-07 11:01:29,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-08-07 11:01:29,466 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 241 [2018-08-07 11:01:29,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:01:31,256 INFO L225 Difference]: With dead ends: 555277 [2018-08-07 11:01:31,256 INFO L226 Difference]: Without dead ends: 405723 [2018-08-07 11:01:31,590 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 939 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=472, Invalid=2720, Unknown=0, NotChecked=0, Total=3192 [2018-08-07 11:01:31,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405723 states. [2018-08-07 11:01:39,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405723 to 396119. [2018-08-07 11:01:39,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396119 states. [2018-08-07 11:01:40,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396119 states to 396119 states and 556056 transitions. [2018-08-07 11:01:40,320 INFO L78 Accepts]: Start accepts. Automaton has 396119 states and 556056 transitions. Word has length 241 [2018-08-07 11:01:40,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:01:40,320 INFO L480 AbstractCegarLoop]: Abstraction has 396119 states and 556056 transitions. [2018-08-07 11:01:40,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-08-07 11:01:40,320 INFO L276 IsEmpty]: Start isEmpty. Operand 396119 states and 556056 transitions. [2018-08-07 11:01:40,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2018-08-07 11:01:40,617 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:01:40,618 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-08-07 11:01:40,618 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 11:01:40,618 INFO L82 PathProgramCache]: Analyzing trace with hash -2091140557, now seen corresponding path program 1 times [2018-08-07 11:01:40,618 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:01:40,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:01:40,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:01:40,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:01:40,619 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:01:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:01:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:01:42,471 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:01:42,471 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 11:01:42,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:01:42,485 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:01:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:01:42,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:01:42,822 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:01:42,822 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:01:42,936 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:01:42,958 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:01:42,958 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 11:01:42,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:01:42,974 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:01:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:01:43,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:01:44,247 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:01:44,247 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:01:44,408 WARN L170 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-08-07 11:01:44,586 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:01:44,589 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 11:01:44,589 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-08-07 11:01:44,589 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 11:01:44,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 11:01:44,591 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 11:01:44,591 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-08-07 11:01:44,592 INFO L87 Difference]: Start difference. First operand 396119 states and 556056 transitions. Second operand 9 states. [2018-08-07 11:02:17,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:02:17,050 INFO L93 Difference]: Finished difference Result 963139 states and 1554589 transitions. [2018-08-07 11:02:17,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-08-07 11:02:17,051 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 297 [2018-08-07 11:02:17,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:02:20,300 INFO L225 Difference]: With dead ends: 963139 [2018-08-07 11:02:20,300 INFO L226 Difference]: Without dead ends: 567457 [2018-08-07 11:02:21,199 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1243 GetRequests, 1195 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=447, Invalid=1809, Unknown=0, NotChecked=0, Total=2256 [2018-08-07 11:02:21,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567457 states. [2018-08-07 11:02:33,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567457 to 535572. [2018-08-07 11:02:33,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535572 states. [2018-08-07 11:02:35,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535572 states to 535572 states and 674162 transitions. [2018-08-07 11:02:35,051 INFO L78 Accepts]: Start accepts. Automaton has 535572 states and 674162 transitions. Word has length 297 [2018-08-07 11:02:35,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:02:35,052 INFO L480 AbstractCegarLoop]: Abstraction has 535572 states and 674162 transitions. [2018-08-07 11:02:35,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 11:02:35,052 INFO L276 IsEmpty]: Start isEmpty. Operand 535572 states and 674162 transitions. [2018-08-07 11:02:35,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-08-07 11:02:35,314 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:02:35,315 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:02:35,315 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 11:02:35,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1210419489, now seen corresponding path program 1 times [2018-08-07 11:02:35,315 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:02:35,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:02:35,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:02:35,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:02:35,317 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:02:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:02:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:02:37,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:02:37,482 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 11:02:37,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:02:37,489 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:02:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:02:37,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:02:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:02:37,823 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:02:37,960 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:02:37,982 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:02:37,982 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 11:02:37,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:02:37,998 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:02:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:02:38,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:02:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 113 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:02:38,785 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:02:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:02:39,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 11:02:39,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 8] total 17 [2018-08-07 11:02:39,059 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 11:02:39,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 11:02:39,060 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 11:02:39,061 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2018-08-07 11:02:39,061 INFO L87 Difference]: Start difference. First operand 535572 states and 674162 transitions. Second operand 6 states. [2018-08-07 11:02:46,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 11:02:46,539 INFO L93 Difference]: Finished difference Result 830336 states and 1041084 transitions. [2018-08-07 11:02:46,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-08-07 11:02:46,539 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 313 [2018-08-07 11:02:46,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 11:02:47,316 INFO L225 Difference]: With dead ends: 830336 [2018-08-07 11:02:47,316 INFO L226 Difference]: Without dead ends: 296745 [2018-08-07 11:02:47,760 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1258 GetRequests, 1238 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2018-08-07 11:02:47,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296745 states. [2018-08-07 11:02:53,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296745 to 280817. [2018-08-07 11:02:53,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280817 states. [2018-08-07 11:02:53,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280817 states to 280817 states and 343965 transitions. [2018-08-07 11:02:53,657 INFO L78 Accepts]: Start accepts. Automaton has 280817 states and 343965 transitions. Word has length 313 [2018-08-07 11:02:53,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 11:02:53,658 INFO L480 AbstractCegarLoop]: Abstraction has 280817 states and 343965 transitions. [2018-08-07 11:02:53,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 11:02:53,658 INFO L276 IsEmpty]: Start isEmpty. Operand 280817 states and 343965 transitions. [2018-08-07 11:02:53,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-08-07 11:02:53,773 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 11:02:53,773 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-08-07 11:02:53,774 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 11:02:53,774 INFO L82 PathProgramCache]: Analyzing trace with hash -551964203, now seen corresponding path program 1 times [2018-08-07 11:02:53,774 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 11:02:53,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:02:53,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:02:53,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 11:02:53,775 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 11:02:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:02:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 225 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 11:02:54,354 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 11:02:54,354 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 11:02:54,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 11:02:54,362 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 11:03:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 11:03:02,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 11:03:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-08-07 11:03:02,760 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 11:03:02,927 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-08-07 11:03:02,948 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-08-07 11:03:02,949 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-08-07 11:03:02,949 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 11:03:02,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 11:03:02,949 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 11:03:02,949 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-08-07 11:03:02,950 INFO L87 Difference]: Start difference. First operand 280817 states and 343965 transitions. Second operand 3 states. Received shutdown request... [2018-08-07 11:03:04,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 11:03:04,216 WARN L549 AbstractCegarLoop]: Verification canceled [2018-08-07 11:03:04,221 WARN L202 ceAbstractionStarter]: Timeout [2018-08-07 11:03:04,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.08 11:03:04 BoogieIcfgContainer [2018-08-07 11:03:04,222 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-08-07 11:03:04,223 INFO L168 Benchmark]: Toolchain (without parser) took 200139.99 ms. Allocated memory was 1.5 GB in the beginning and 6.2 GB in the end (delta: 4.7 GB). Free memory was 1.4 GB in the beginning and 4.1 GB in the end (delta: -2.7 GB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-08-07 11:03:04,224 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 11:03:04,224 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1095.86 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 7.1 GB. [2018-08-07 11:03:04,225 INFO L168 Benchmark]: Boogie Procedure Inliner took 184.26 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-08-07 11:03:04,226 INFO L168 Benchmark]: Boogie Preprocessor took 373.52 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -928.6 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. [2018-08-07 11:03:04,226 INFO L168 Benchmark]: RCFGBuilder took 4779.19 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 290.7 MB). Peak memory consumption was 290.7 MB. Max. memory is 7.1 GB. [2018-08-07 11:03:04,227 INFO L168 Benchmark]: TraceAbstraction took 193695.30 ms. Allocated memory was 2.3 GB in the beginning and 6.2 GB in the end (delta: 3.9 GB). Free memory was 1.9 GB in the beginning and 4.1 GB in the end (delta: -2.1 GB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-08-07 11:03:04,232 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 1095.86 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 184.26 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 373.52 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -928.6 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4779.19 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 290.7 MB). Peak memory consumption was 290.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 193695.30 ms. Allocated memory was 2.3 GB in the beginning and 6.2 GB in the end (delta: 3.9 GB). Free memory was 1.9 GB in the beginning and 4.1 GB in the end (delta: -2.1 GB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1593]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1593). Cancelled while BasicCegarLoop was constructing difference of abstraction (280817states) and FLOYD_HOARE automaton (currently 3 states, 3 states before enhancement), while ReachableStatesComputation was computing reachable states (21994 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 193.6s OverallTime, 13 OverallIterations, 3 TraceHistogramMax, 113.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3063 SDtfs, 20283 SDslu, 4951 SDs, 0 SdLazy, 26200 SolverSat, 7078 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 45.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7946 GetRequests, 7697 SyntacticMatches, 26 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 13.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=535572occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 41.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 63342 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 8.9s SsaConstructionTime, 6.5s SatisfiabilityAnalysisTime, 18.6s InterpolantComputationTime, 7050 NumberOfCodeBlocks, 7050 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 10875 ConstructedInterpolants, 0 QuantifiedInterpolants, 7021833 SizeOfPredicates, 52 NumberOfNonLiveVariables, 15974 ConjunctsInSsa, 245 ConjunctsInUnsatCore, 43 InterpolantComputations, 14 PerfectInterpolantSequences, 3012/3209 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/Problem03_label01_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-08-07_11-03-04-246.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label01_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-08-07_11-03-04-246.csv Completed graceful shutdown