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/Problem11_label06_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ddc4263 [2018-08-07 12:09:45,125 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-08-07 12:09:45,127 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-08-07 12:09:45,140 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-08-07 12:09:45,140 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-08-07 12:09:45,142 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-08-07 12:09:45,143 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-08-07 12:09:45,152 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-08-07 12:09:45,155 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-08-07 12:09:45,155 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-08-07 12:09:45,156 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-08-07 12:09:45,157 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-08-07 12:09:45,158 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-08-07 12:09:45,159 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-08-07 12:09:45,160 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-08-07 12:09:45,161 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-08-07 12:09:45,162 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-08-07 12:09:45,164 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-08-07 12:09:45,166 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-08-07 12:09:45,167 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-08-07 12:09:45,168 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-08-07 12:09:45,170 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-08-07 12:09:45,172 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-08-07 12:09:45,173 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-08-07 12:09:45,173 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-08-07 12:09:45,174 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-08-07 12:09:45,175 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-08-07 12:09:45,176 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-08-07 12:09:45,177 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-08-07 12:09:45,178 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-08-07 12:09:45,178 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-08-07 12:09:45,179 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-08-07 12:09:45,179 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-08-07 12:09:45,179 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-08-07 12:09:45,180 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-08-07 12:09:45,181 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-08-07 12:09:45,181 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-08-07 12:09:45,197 INFO L110 SettingsManager]: Loading preferences was successful [2018-08-07 12:09:45,197 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-08-07 12:09:45,198 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-08-07 12:09:45,198 INFO L133 SettingsManager]: * User list type=DISABLED [2018-08-07 12:09:45,198 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-08-07 12:09:45,198 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-08-07 12:09:45,199 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-08-07 12:09:45,199 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-08-07 12:09:45,199 INFO L133 SettingsManager]: * Log string format=TERM [2018-08-07 12:09:45,199 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-08-07 12:09:45,199 INFO L133 SettingsManager]: * Interval Domain=false [2018-08-07 12:09:45,200 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-08-07 12:09:45,200 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-08-07 12:09:45,201 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-08-07 12:09:45,201 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-08-07 12:09:45,201 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-08-07 12:09:45,201 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-08-07 12:09:45,201 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-08-07 12:09:45,201 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-08-07 12:09:45,202 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-08-07 12:09:45,202 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-08-07 12:09:45,202 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-08-07 12:09:45,202 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-08-07 12:09:45,202 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 12:09:45,203 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-08-07 12:09:45,203 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-08-07 12:09:45,203 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-08-07 12:09:45,203 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-08-07 12:09:45,203 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-08-07 12:09:45,204 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-08-07 12:09:45,204 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-08-07 12:09:45,204 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-08-07 12:09:45,204 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-08-07 12:09:45,249 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-08-07 12:09:45,268 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-08-07 12:09:45,274 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-08-07 12:09:45,276 INFO L271 PluginConnector]: Initializing CDTParser... [2018-08-07 12:09:45,277 INFO L276 PluginConnector]: CDTParser initialized [2018-08-07 12:09:45,277 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label06_true-unreach-call.c [2018-08-07 12:09:45,677 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ca493654/9141d94a755248e09a60b65c59c2268b/FLAGd967d710c [2018-08-07 12:09:45,975 INFO L276 CDTParser]: Found 1 translation units. [2018-08-07 12:09:45,979 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label06_true-unreach-call.c [2018-08-07 12:09:46,004 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ca493654/9141d94a755248e09a60b65c59c2268b/FLAGd967d710c [2018-08-07 12:09:46,023 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ca493654/9141d94a755248e09a60b65c59c2268b [2018-08-07 12:09:46,034 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-08-07 12:09:46,036 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-08-07 12:09:46,038 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-08-07 12:09:46,038 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-08-07 12:09:46,047 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-08-07 12:09:46,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 12:09:46" (1/1) ... [2018-08-07 12:09:46,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@85aa627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:09:46, skipping insertion in model container [2018-08-07 12:09:46,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 12:09:46" (1/1) ... [2018-08-07 12:09:46,310 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-08-07 12:09:46,773 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 12:09:46,794 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-08-07 12:09:47,007 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 12:09:47,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:09:47 WrapperNode [2018-08-07 12:09:47,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-08-07 12:09:47,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-08-07 12:09:47,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-08-07 12:09:47,094 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-08-07 12:09:47,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:09:47" (1/1) ... [2018-08-07 12:09:47,156 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:09:47" (1/1) ... [2018-08-07 12:09:47,265 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-08-07 12:09:47,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-08-07 12:09:47,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-08-07 12:09:47,266 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-08-07 12:09:47,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:09:47" (1/1) ... [2018-08-07 12:09:47,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:09:47" (1/1) ... [2018-08-07 12:09:47,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:09:47" (1/1) ... [2018-08-07 12:09:47,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:09:47" (1/1) ... [2018-08-07 12:09:47,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:09:47" (1/1) ... [2018-08-07 12:09:47,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:09:47" (1/1) ... [2018-08-07 12:09:47,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:09:47" (1/1) ... [2018-08-07 12:09:47,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-08-07 12:09:47,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-08-07 12:09:47,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-08-07 12:09:47,609 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-08-07 12:09:47,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:09:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 12:09:47,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-08-07 12:09:47,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-08-07 12:09:47,684 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-08-07 12:09:47,685 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-08-07 12:09:47,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-08-07 12:09:47,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-08-07 12:09:47,686 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-08-07 12:09:47,686 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-08-07 12:09:53,036 INFO L273 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-08-07 12:09:53,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 12:09:53 BoogieIcfgContainer [2018-08-07 12:09:53,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-08-07 12:09:53,038 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-08-07 12:09:53,038 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-08-07 12:09:53,042 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-08-07 12:09:53,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.08 12:09:46" (1/3) ... [2018-08-07 12:09:53,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@349c16c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 12:09:53, skipping insertion in model container [2018-08-07 12:09:53,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:09:47" (2/3) ... [2018-08-07 12:09:53,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@349c16c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 12:09:53, skipping insertion in model container [2018-08-07 12:09:53,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 12:09:53" (3/3) ... [2018-08-07 12:09:53,046 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label06_true-unreach-call.c [2018-08-07 12:09:53,056 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-08-07 12:09:53,066 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-08-07 12:09:53,121 INFO L129 ementStrategyFactory]: Using default assertion order modulation [2018-08-07 12:09:53,122 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-08-07 12:09:53,123 INFO L382 AbstractCegarLoop]: Hoare is true [2018-08-07 12:09:53,123 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-08-07 12:09:53,123 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-08-07 12:09:53,123 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-08-07 12:09:53,123 INFO L386 AbstractCegarLoop]: Difference is false [2018-08-07 12:09:53,123 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-08-07 12:09:53,124 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-08-07 12:09:53,152 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-08-07 12:09:53,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-08-07 12:09:53,162 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:09:53,164 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] [2018-08-07 12:09:53,165 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:09:53,169 INFO L82 PathProgramCache]: Analyzing trace with hash 712753892, now seen corresponding path program 1 times [2018-08-07 12:09:53,172 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:09:53,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:09:53,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:09:53,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:09:53,221 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:09:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:09:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:09:53,781 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:09:53,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-08-07 12:09:53,782 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:09:53,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-07 12:09:53,805 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-07 12:09:53,806 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:09:53,809 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 4 states. [2018-08-07 12:09:57,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:09:57,151 INFO L93 Difference]: Finished difference Result 985 states and 1761 transitions. [2018-08-07 12:09:57,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-08-07 12:09:57,154 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2018-08-07 12:09:57,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:09:57,181 INFO L225 Difference]: With dead ends: 985 [2018-08-07 12:09:57,182 INFO L226 Difference]: Without dead ends: 686 [2018-08-07 12:09:57,191 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:09:57,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2018-08-07 12:09:57,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 686. [2018-08-07 12:09:57,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 686 states. [2018-08-07 12:09:57,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1046 transitions. [2018-08-07 12:09:57,304 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1046 transitions. Word has length 70 [2018-08-07 12:09:57,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:09:57,304 INFO L480 AbstractCegarLoop]: Abstraction has 686 states and 1046 transitions. [2018-08-07 12:09:57,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-08-07 12:09:57,305 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1046 transitions. [2018-08-07 12:09:57,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-08-07 12:09:57,315 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:09:57,315 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:09:57,315 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:09:57,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1135227133, now seen corresponding path program 1 times [2018-08-07 12:09:57,316 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:09:57,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:09:57,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:09:57,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:09:57,318 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:09:57,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:09:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:09:57,639 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:09:57,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-08-07 12:09:57,640 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:09:57,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:09:57,642 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:09:57,642 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-08-07 12:09:57,643 INFO L87 Difference]: Start difference. First operand 686 states and 1046 transitions. Second operand 6 states. [2018-08-07 12:10:03,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:10:03,276 INFO L93 Difference]: Finished difference Result 2339 states and 3736 transitions. [2018-08-07 12:10:03,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 12:10:03,278 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 151 [2018-08-07 12:10:03,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:10:03,291 INFO L225 Difference]: With dead ends: 2339 [2018-08-07 12:10:03,291 INFO L226 Difference]: Without dead ends: 1659 [2018-08-07 12:10:03,296 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-08-07 12:10:03,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2018-08-07 12:10:03,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1642. [2018-08-07 12:10:03,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1642 states. [2018-08-07 12:10:03,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2356 transitions. [2018-08-07 12:10:03,386 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2356 transitions. Word has length 151 [2018-08-07 12:10:03,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:10:03,387 INFO L480 AbstractCegarLoop]: Abstraction has 1642 states and 2356 transitions. [2018-08-07 12:10:03,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:10:03,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2356 transitions. [2018-08-07 12:10:03,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-08-07 12:10:03,402 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:10:03,403 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:10:03,403 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:10:03,403 INFO L82 PathProgramCache]: Analyzing trace with hash 734365855, now seen corresponding path program 1 times [2018-08-07 12:10:03,403 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:10:03,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:10:03,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:10:03,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:10:03,406 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:10:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:10:03,801 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:10:03,801 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:10:03,802 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-08-07 12:10:03,802 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:10:03,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-07 12:10:03,803 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-07 12:10:03,803 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:10:03,803 INFO L87 Difference]: Start difference. First operand 1642 states and 2356 transitions. Second operand 4 states. [2018-08-07 12:10:06,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:10:06,736 INFO L93 Difference]: Finished difference Result 6031 states and 9065 transitions. [2018-08-07 12:10:06,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-08-07 12:10:06,737 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 202 [2018-08-07 12:10:06,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:10:06,772 INFO L225 Difference]: With dead ends: 6031 [2018-08-07 12:10:06,772 INFO L226 Difference]: Without dead ends: 4395 [2018-08-07 12:10:06,787 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:10:06,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4395 states. [2018-08-07 12:10:06,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4395 to 4372. [2018-08-07 12:10:06,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4372 states. [2018-08-07 12:10:06,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4372 states to 4372 states and 6119 transitions. [2018-08-07 12:10:06,952 INFO L78 Accepts]: Start accepts. Automaton has 4372 states and 6119 transitions. Word has length 202 [2018-08-07 12:10:06,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:10:06,953 INFO L480 AbstractCegarLoop]: Abstraction has 4372 states and 6119 transitions. [2018-08-07 12:10:06,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-08-07 12:10:06,953 INFO L276 IsEmpty]: Start isEmpty. Operand 4372 states and 6119 transitions. [2018-08-07 12:10:06,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-08-07 12:10:06,973 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:10:06,973 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:10:06,974 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:10:06,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1459839830, now seen corresponding path program 1 times [2018-08-07 12:10:06,974 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:10:06,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:10:06,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:10:06,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:10:06,976 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:10:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:10:07,324 WARN L170 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 12:10:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 126 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:10:07,808 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:10:07,808 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:10:07,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:10:07,828 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:10:07,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:10:07,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:10:08,430 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-08-07 12:10:08,430 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:10:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 126 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:10:08,943 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 12:10:08,943 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-08-07 12:10:08,943 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:10:08,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:10:08,945 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:10:08,945 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-08-07 12:10:08,945 INFO L87 Difference]: Start difference. First operand 4372 states and 6119 transitions. Second operand 5 states. [2018-08-07 12:10:15,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:10:15,086 INFO L93 Difference]: Finished difference Result 12666 states and 18485 transitions. [2018-08-07 12:10:15,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 12:10:15,095 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 246 [2018-08-07 12:10:15,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:10:15,154 INFO L225 Difference]: With dead ends: 12666 [2018-08-07 12:10:15,154 INFO L226 Difference]: Without dead ends: 8300 [2018-08-07 12:10:15,191 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 487 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-08-07 12:10:15,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8300 states. [2018-08-07 12:10:15,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8300 to 8043. [2018-08-07 12:10:15,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8043 states. [2018-08-07 12:10:15,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8043 states to 8043 states and 11212 transitions. [2018-08-07 12:10:15,433 INFO L78 Accepts]: Start accepts. Automaton has 8043 states and 11212 transitions. Word has length 246 [2018-08-07 12:10:15,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:10:15,433 INFO L480 AbstractCegarLoop]: Abstraction has 8043 states and 11212 transitions. [2018-08-07 12:10:15,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:10:15,434 INFO L276 IsEmpty]: Start isEmpty. Operand 8043 states and 11212 transitions. [2018-08-07 12:10:15,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-08-07 12:10:15,459 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:10:15,459 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:10:15,459 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:10:15,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1219709963, now seen corresponding path program 1 times [2018-08-07 12:10:15,460 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:10:15,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:10:15,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:10:15,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:10:15,461 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:10:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:10:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:10:15,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:10:15,975 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:10:15,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:10:15,988 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:10:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:10:16,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:10:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:10:16,240 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:10:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:10:16,501 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:10:16,502 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:10:16,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:10:16,518 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:10:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:10:16,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:10:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 127 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:10:17,086 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:10:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (4)] Exception during sending of exit command (exit): Broken pipe [2018-08-07 12:10:17,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:10:17,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 5] total 10 [2018-08-07 12:10:17,639 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:10:17,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-08-07 12:10:17,641 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-08-07 12:10:17,641 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-08-07 12:10:17,641 INFO L87 Difference]: Start difference. First operand 8043 states and 11212 transitions. Second operand 7 states. [2018-08-07 12:10:20,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:10:20,844 INFO L93 Difference]: Finished difference Result 18438 states and 27231 transitions. [2018-08-07 12:10:20,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 12:10:20,848 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 247 [2018-08-07 12:10:20,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:10:20,930 INFO L225 Difference]: With dead ends: 18438 [2018-08-07 12:10:20,930 INFO L226 Difference]: Without dead ends: 10401 [2018-08-07 12:10:20,967 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 995 GetRequests, 981 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-08-07 12:10:20,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10401 states. [2018-08-07 12:10:21,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10401 to 10313. [2018-08-07 12:10:21,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10313 states. [2018-08-07 12:10:21,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 13781 transitions. [2018-08-07 12:10:21,256 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 13781 transitions. Word has length 247 [2018-08-07 12:10:21,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:10:21,256 INFO L480 AbstractCegarLoop]: Abstraction has 10313 states and 13781 transitions. [2018-08-07 12:10:21,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-08-07 12:10:21,256 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 13781 transitions. [2018-08-07 12:10:21,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-08-07 12:10:21,305 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:10:21,305 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, 2, 2, 2, 2, 2, 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] [2018-08-07 12:10:21,305 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:10:21,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1292870505, now seen corresponding path program 1 times [2018-08-07 12:10:21,306 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:10:21,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:10:21,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:10:21,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:10:21,307 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:10:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:10:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-08-07 12:10:21,615 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:10:21,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-08-07 12:10:21,615 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:10:21,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 12:10:21,616 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 12:10:21,616 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 12:10:21,617 INFO L87 Difference]: Start difference. First operand 10313 states and 13781 transitions. Second operand 3 states. [2018-08-07 12:10:23,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:10:23,711 INFO L93 Difference]: Finished difference Result 19756 states and 26484 transitions. [2018-08-07 12:10:23,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 12:10:23,715 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 340 [2018-08-07 12:10:23,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:10:23,750 INFO L225 Difference]: With dead ends: 19756 [2018-08-07 12:10:23,750 INFO L226 Difference]: Without dead ends: 9449 [2018-08-07 12:10:23,781 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 12:10:23,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9449 states. [2018-08-07 12:10:23,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9449 to 9253. [2018-08-07 12:10:23,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9253 states. [2018-08-07 12:10:24,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9253 states to 9253 states and 11733 transitions. [2018-08-07 12:10:24,008 INFO L78 Accepts]: Start accepts. Automaton has 9253 states and 11733 transitions. Word has length 340 [2018-08-07 12:10:24,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:10:24,009 INFO L480 AbstractCegarLoop]: Abstraction has 9253 states and 11733 transitions. [2018-08-07 12:10:24,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 12:10:24,009 INFO L276 IsEmpty]: Start isEmpty. Operand 9253 states and 11733 transitions. [2018-08-07 12:10:24,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2018-08-07 12:10:24,050 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:10:24,050 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2018-08-07 12:10:24,050 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:10:24,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1801202939, now seen corresponding path program 1 times [2018-08-07 12:10:24,051 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:10:24,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:10:24,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:10:24,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:10:24,052 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:10:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:10:24,714 WARN L170 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-08-07 12:10:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 378 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-08-07 12:10:25,400 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:10:25,400 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:10:25,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:10:25,413 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:10:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:10:25,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:10:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2018-08-07 12:10:26,164 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:10:26,381 WARN L170 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-08-07 12:10:26,947 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 189 proven. 140 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-08-07 12:10:26,967 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 12:10:26,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2018-08-07 12:10:26,968 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:10:26,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:10:26,970 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:10:26,970 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2018-08-07 12:10:26,970 INFO L87 Difference]: Start difference. First operand 9253 states and 11733 transitions. Second operand 5 states. [2018-08-07 12:10:31,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:10:31,021 INFO L93 Difference]: Finished difference Result 21786 states and 27609 transitions. [2018-08-07 12:10:31,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 12:10:31,021 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 392 [2018-08-07 12:10:31,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:10:31,066 INFO L225 Difference]: With dead ends: 21786 [2018-08-07 12:10:31,067 INFO L226 Difference]: Without dead ends: 12539 [2018-08-07 12:10:31,086 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 796 GetRequests, 779 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2018-08-07 12:10:31,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12539 states. [2018-08-07 12:10:31,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12539 to 12411. [2018-08-07 12:10:31,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12411 states. [2018-08-07 12:10:31,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12411 states to 12411 states and 15594 transitions. [2018-08-07 12:10:31,322 INFO L78 Accepts]: Start accepts. Automaton has 12411 states and 15594 transitions. Word has length 392 [2018-08-07 12:10:31,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:10:31,322 INFO L480 AbstractCegarLoop]: Abstraction has 12411 states and 15594 transitions. [2018-08-07 12:10:31,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:10:31,322 INFO L276 IsEmpty]: Start isEmpty. Operand 12411 states and 15594 transitions. [2018-08-07 12:10:31,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2018-08-07 12:10:31,372 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:10:31,373 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:10:31,373 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:10:31,374 INFO L82 PathProgramCache]: Analyzing trace with hash 273232009, now seen corresponding path program 1 times [2018-08-07 12:10:31,374 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:10:31,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:10:31,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:10:31,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:10:31,376 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:10:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:10:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 406 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-08-07 12:10:32,089 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:10:32,089 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:10:32,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:10:32,108 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:10:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:10:32,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:10:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 199 proven. 6 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2018-08-07 12:10:32,967 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:10:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 201 proven. 206 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-08-07 12:10:33,445 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:10:33,445 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:10:33,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:10:33,461 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:10:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:10:33,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:10:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 199 proven. 6 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2018-08-07 12:10:33,979 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:10:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 201 proven. 206 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-08-07 12:10:34,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:10:34,981 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8, 7, 8] total 14 [2018-08-07 12:10:34,981 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:10:34,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-08-07 12:10:34,982 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-08-07 12:10:34,983 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-08-07 12:10:34,983 INFO L87 Difference]: Start difference. First operand 12411 states and 15594 transitions. Second operand 10 states. [2018-08-07 12:10:42,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:10:42,360 INFO L93 Difference]: Finished difference Result 32008 states and 41980 transitions. [2018-08-07 12:10:42,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-08-07 12:10:42,360 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 420 [2018-08-07 12:10:42,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:10:42,435 INFO L225 Difference]: With dead ends: 32008 [2018-08-07 12:10:42,435 INFO L226 Difference]: Without dead ends: 19603 [2018-08-07 12:10:42,473 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1705 GetRequests, 1674 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2018-08-07 12:10:42,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19603 states. [2018-08-07 12:10:42,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19603 to 17827. [2018-08-07 12:10:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17827 states. [2018-08-07 12:10:42,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17827 states to 17827 states and 22057 transitions. [2018-08-07 12:10:42,859 INFO L78 Accepts]: Start accepts. Automaton has 17827 states and 22057 transitions. Word has length 420 [2018-08-07 12:10:42,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:10:42,860 INFO L480 AbstractCegarLoop]: Abstraction has 17827 states and 22057 transitions. [2018-08-07 12:10:42,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-08-07 12:10:42,860 INFO L276 IsEmpty]: Start isEmpty. Operand 17827 states and 22057 transitions. [2018-08-07 12:10:42,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2018-08-07 12:10:42,913 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:10:42,914 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:10:42,914 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:10:42,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1007106465, now seen corresponding path program 1 times [2018-08-07 12:10:42,916 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:10:42,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:10:42,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:10:42,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:10:42,917 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:10:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:10:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 195 proven. 217 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2018-08-07 12:10:43,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:10:43,783 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:10:43,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:10:43,802 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:10:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:10:43,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:10:48,100 WARN L170 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 33 DAG size of output: 13 [2018-08-07 12:10:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 347 proven. 107 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-08-07 12:10:48,291 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:10:48,929 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 300 proven. 107 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-08-07 12:10:48,951 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:10:48,952 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:10:48,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:10:48,967 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:10:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:10:49,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:10:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 347 proven. 107 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-08-07 12:10:51,720 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:10:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 300 proven. 107 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-08-07 12:10:52,138 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:10:52,139 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 5, 8, 5] total 15 [2018-08-07 12:10:52,139 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:10:52,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-08-07 12:10:52,140 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-08-07 12:10:52,141 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=150, Unknown=3, NotChecked=0, Total=210 [2018-08-07 12:10:52,141 INFO L87 Difference]: Start difference. First operand 17827 states and 22057 transitions. Second operand 10 states. [2018-08-07 12:10:52,694 WARN L170 SmtUtils]: Spent 523.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-08-07 12:10:56,329 WARN L170 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-08-07 12:12:49,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:12:49,101 INFO L93 Difference]: Finished difference Result 48035 states and 68209 transitions. [2018-08-07 12:12:49,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-08-07 12:12:49,102 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 425 [2018-08-07 12:12:49,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:12:49,281 INFO L225 Difference]: With dead ends: 48035 [2018-08-07 12:12:49,282 INFO L226 Difference]: Without dead ends: 30784 [2018-08-07 12:12:49,375 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1740 GetRequests, 1703 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=238, Invalid=743, Unknown=11, NotChecked=0, Total=992 [2018-08-07 12:12:49,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30784 states. [2018-08-07 12:12:50,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30784 to 29784. [2018-08-07 12:12:50,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29784 states. [2018-08-07 12:12:50,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29784 states to 29784 states and 38326 transitions. [2018-08-07 12:12:50,328 INFO L78 Accepts]: Start accepts. Automaton has 29784 states and 38326 transitions. Word has length 425 [2018-08-07 12:12:50,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:12:50,329 INFO L480 AbstractCegarLoop]: Abstraction has 29784 states and 38326 transitions. [2018-08-07 12:12:50,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-08-07 12:12:50,329 INFO L276 IsEmpty]: Start isEmpty. Operand 29784 states and 38326 transitions. [2018-08-07 12:12:50,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2018-08-07 12:12:50,389 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:12:50,389 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:12:50,389 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:12:50,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1340263565, now seen corresponding path program 1 times [2018-08-07 12:12:50,390 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:12:50,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:12:50,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:12:50,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:12:50,391 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:12:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:12:51,850 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 402 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:12:51,850 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:12:51,850 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:12:51,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:12:51,859 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:12:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:12:52,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:12:53,744 WARN L170 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 74 DAG size of output: 39 [2018-08-07 12:12:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 318 proven. 183 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:12:54,152 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:12:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 402 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:12:55,427 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:12:55,427 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:12:55,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:12:55,443 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:12:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:12:55,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:13:00,714 WARN L170 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 189 DAG size of output: 42 [2018-08-07 12:13:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 318 proven. 183 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:13:04,976 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:13:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 400 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:13:06,757 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:13:06,758 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 11, 12, 15] total 41 [2018-08-07 12:13:06,758 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:13:06,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-08-07 12:13:06,759 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-08-07 12:13:06,760 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1380, Unknown=1, NotChecked=0, Total=1640 [2018-08-07 12:13:06,760 INFO L87 Difference]: Start difference. First operand 29784 states and 38326 transitions. Second operand 19 states. [2018-08-07 12:13:12,630 WARN L170 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2018-08-07 12:13:16,567 WARN L170 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2018-08-07 12:13:19,111 WARN L170 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2018-08-07 12:13:28,055 WARN L170 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2018-08-07 12:13:34,405 WARN L170 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-08-07 12:13:37,920 WARN L170 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2018-08-07 12:13:39,853 WARN L170 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2018-08-07 12:13:51,135 WARN L170 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2018-08-07 12:13:53,111 WARN L170 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2018-08-07 12:13:54,470 WARN L170 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2018-08-07 12:13:57,846 WARN L170 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2018-08-07 12:13:59,629 WARN L170 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 63 DAG size of output: 46 Received shutdown request... [2018-08-07 12:14:03,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-08-07 12:14:03,657 WARN L549 AbstractCegarLoop]: Verification canceled [2018-08-07 12:14:03,661 WARN L202 ceAbstractionStarter]: Timeout [2018-08-07 12:14:03,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.08 12:14:03 BoogieIcfgContainer [2018-08-07 12:14:03,661 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-08-07 12:14:03,662 INFO L168 Benchmark]: Toolchain (without parser) took 257626.89 ms. Allocated memory was 1.5 GB in the beginning and 3.4 GB in the end (delta: 1.8 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -115.8 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-08-07 12:14:03,663 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-08-07 12:14:03,663 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1055.85 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: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-08-07 12:14:03,664 INFO L168 Benchmark]: Boogie Procedure Inliner took 171.25 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: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-08-07 12:14:03,665 INFO L168 Benchmark]: Boogie Preprocessor took 342.65 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 815.3 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -936.6 MB). Peak memory consumption was 49.6 MB. Max. memory is 7.1 GB. [2018-08-07 12:14:03,666 INFO L168 Benchmark]: RCFGBuilder took 5428.77 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 200.0 MB). Peak memory consumption was 200.0 MB. Max. memory is 7.1 GB. [2018-08-07 12:14:03,666 INFO L168 Benchmark]: TraceAbstraction took 250622.85 ms. Allocated memory was 2.3 GB in the beginning and 3.4 GB in the end (delta: 1.0 GB). Free memory was 2.1 GB in the beginning and 1.5 GB in the end (delta: 525.7 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-08-07 12:14:03,671 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 1055.85 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: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 171.25 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: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 342.65 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 815.3 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -936.6 MB). Peak memory consumption was 49.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5428.77 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 200.0 MB). Peak memory consumption was 200.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 250622.85 ms. Allocated memory was 2.3 GB in the beginning and 3.4 GB in the end (delta: 1.0 GB). Free memory was 2.1 GB in the beginning and 1.5 GB in the end (delta: 525.7 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 195]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 195). Cancelled while BasicCegarLoop was constructing difference of abstraction (29784states) and FLOYD_HOARE automaton (currently 59 states, 19 states before enhancement), while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 96 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 250.5s OverallTime, 10 OverallIterations, 4 TraceHistogramMax, 209.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1783 SDtfs, 13935 SDslu, 2497 SDs, 0 SdLazy, 21854 SolverSat, 4760 SolverUnsat, 94 SolverUnknown, 0 SolverNotchecked, 163.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7568 GetRequests, 7344 SyntacticMatches, 28 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3270 ImplicationChecksByTransitivity, 59.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29784occurred in iteration=9, 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: 2.6s AutomataMinimizationTime, 9 MinimizatonAttempts, 3485 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 33.6s InterpolantComputationTime, 6611 NumberOfCodeBlocks, 6611 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 10267 ConstructedInterpolants, 12 QuantifiedInterpolants, 21308954 SizeOfPredicates, 35 NumberOfNonLiveVariables, 6055 ConjunctsInSsa, 129 ConjunctsInUnsatCore, 30 InterpolantComputations, 6 PerfectInterpolantSequences, 8875/10970 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/Problem11_label06_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-08-07_12-14-03-685.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem11_label06_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-08-07_12-14-03-685.csv Completed graceful shutdown