java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label24_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 17:21:44,145 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 17:21:44,147 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 17:21:44,165 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 17:21:44,166 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 17:21:44,167 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 17:21:44,168 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 17:21:44,169 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 17:21:44,171 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 17:21:44,172 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 17:21:44,173 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 17:21:44,173 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 17:21:44,175 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 17:21:44,176 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 17:21:44,177 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 17:21:44,178 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 17:21:44,181 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 17:21:44,183 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 17:21:44,186 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 17:21:44,193 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 17:21:44,194 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 17:21:44,197 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 17:21:44,202 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 17:21:44,202 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 17:21:44,202 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 17:21:44,203 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 17:21:44,208 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 17:21:44,208 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 17:21:44,209 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 17:21:44,213 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 17:21:44,213 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 17:21:44,214 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 17:21:44,214 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 17:21:44,214 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 17:21:44,218 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 17:21:44,219 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 17:21:44,219 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 [2018-09-14 17:21:44,247 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 17:21:44,248 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 17:21:44,251 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 17:21:44,251 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 17:21:44,252 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 17:21:44,252 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 17:21:44,252 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 17:21:44,252 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 17:21:44,253 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 17:21:44,253 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 17:21:44,253 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 17:21:44,254 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 17:21:44,254 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 17:21:44,254 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 17:21:44,254 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 17:21:44,254 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 17:21:44,255 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 17:21:44,255 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 17:21:44,255 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 17:21:44,255 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 17:21:44,255 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 17:21:44,256 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 17:21:44,256 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 17:21:44,256 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 17:21:44,256 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 17:21:44,257 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 17:21:44,258 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 17:21:44,258 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 17:21:44,258 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 17:21:44,258 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 17:21:44,258 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 17:21:44,258 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 17:21:44,259 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 17:21:44,331 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 17:21:44,345 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 17:21:44,352 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 17:21:44,353 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 17:21:44,354 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 17:21:44,354 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label24_true-unreach-call.c [2018-09-14 17:21:44,741 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95f977822/1e51b5a05b40434396ab24b27393224d/FLAGcdbf9d739 [2018-09-14 17:21:45,185 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 17:21:45,186 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label24_true-unreach-call.c [2018-09-14 17:21:45,215 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95f977822/1e51b5a05b40434396ab24b27393224d/FLAGcdbf9d739 [2018-09-14 17:21:45,232 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95f977822/1e51b5a05b40434396ab24b27393224d [2018-09-14 17:21:45,244 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 17:21:45,248 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 17:21:45,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 17:21:45,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 17:21:45,256 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 17:21:45,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 05:21:45" (1/1) ... [2018-09-14 17:21:45,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77eb0580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:21:45, skipping insertion in model container [2018-09-14 17:21:45,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 05:21:45" (1/1) ... [2018-09-14 17:21:45,273 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 17:21:46,562 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 17:21:46,582 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 17:21:47,161 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 17:21:47,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:21:47 WrapperNode [2018-09-14 17:21:47,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 17:21:47,395 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 17:21:47,396 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 17:21:47,396 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 17:21:47,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:21:47" (1/1) ... [2018-09-14 17:21:47,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:21:47" (1/1) ... [2018-09-14 17:21:47,657 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 17:21:47,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 17:21:47,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 17:21:47,658 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 17:21:47,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:21:47" (1/1) ... [2018-09-14 17:21:47,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:21:47" (1/1) ... [2018-09-14 17:21:47,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:21:47" (1/1) ... [2018-09-14 17:21:47,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:21:47" (1/1) ... [2018-09-14 17:21:48,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:21:47" (1/1) ... [2018-09-14 17:21:48,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:21:47" (1/1) ... [2018-09-14 17:21:48,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:21:47" (1/1) ... [2018-09-14 17:21:48,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 17:21:48,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 17:21:48,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 17:21:48,620 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 17:21:48,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:21:47" (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 [2018-09-14 17:21:48,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 17:21:48,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 17:21:48,700 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-09-14 17:21:48,700 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-09-14 17:21:48,701 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-09-14 17:21:48,701 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-09-14 17:21:48,701 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-09-14 17:21:48,701 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-09-14 17:21:48,701 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 17:21:48,701 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 17:21:48,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 17:21:48,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 17:21:48,702 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 17:21:48,702 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 17:22:01,004 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 17:22:01,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 05:22:01 BoogieIcfgContainer [2018-09-14 17:22:01,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 17:22:01,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 17:22:01,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 17:22:01,010 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 17:22:01,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 05:21:45" (1/3) ... [2018-09-14 17:22:01,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@125cf986 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 05:22:01, skipping insertion in model container [2018-09-14 17:22:01,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:21:47" (2/3) ... [2018-09-14 17:22:01,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@125cf986 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 05:22:01, skipping insertion in model container [2018-09-14 17:22:01,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 05:22:01" (3/3) ... [2018-09-14 17:22:01,014 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label24_true-unreach-call.c [2018-09-14 17:22:01,024 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 17:22:01,034 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 17:22:01,097 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 17:22:01,098 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 17:22:01,098 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 17:22:01,098 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 17:22:01,098 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 17:22:01,099 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 17:22:01,099 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 17:22:01,099 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 17:22:01,099 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 17:22:01,149 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states. [2018-09-14 17:22:01,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-14 17:22:01,162 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:22:01,163 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] [2018-09-14 17:22:01,164 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:22:01,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1344002707, now seen corresponding path program 1 times [2018-09-14 17:22:01,172 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:22:01,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:22:01,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:22:01,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:22:01,228 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:22:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:22:01,736 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 17:22:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:22:01,859 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:22:01,859 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 17:22:01,859 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:22:01,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 17:22:01,884 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 17:22:01,885 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 17:22:01,887 INFO L87 Difference]: Start difference. First operand 840 states. Second operand 3 states. [2018-09-14 17:22:10,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:22:10,241 INFO L93 Difference]: Finished difference Result 2446 states and 4700 transitions. [2018-09-14 17:22:10,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 17:22:10,243 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2018-09-14 17:22:10,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:22:10,274 INFO L225 Difference]: With dead ends: 2446 [2018-09-14 17:22:10,274 INFO L226 Difference]: Without dead ends: 1604 [2018-09-14 17:22:10,287 INFO L604 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 [2018-09-14 17:22:10,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2018-09-14 17:22:10,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1604. [2018-09-14 17:22:10,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1604 states. [2018-09-14 17:22:10,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2969 transitions. [2018-09-14 17:22:10,437 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2969 transitions. Word has length 53 [2018-09-14 17:22:10,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:22:10,438 INFO L480 AbstractCegarLoop]: Abstraction has 1604 states and 2969 transitions. [2018-09-14 17:22:10,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 17:22:10,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2969 transitions. [2018-09-14 17:22:10,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-14 17:22:10,446 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:22:10,447 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:22:10,447 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:22:10,447 INFO L82 PathProgramCache]: Analyzing trace with hash -450811892, now seen corresponding path program 1 times [2018-09-14 17:22:10,448 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:22:10,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:22:10,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:22:10,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:22:10,449 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:22:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:22:10,669 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:22:10,670 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:22:10,670 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-14 17:22:10,670 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:22:10,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 17:22:10,674 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 17:22:10,674 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-14 17:22:10,674 INFO L87 Difference]: Start difference. First operand 1604 states and 2969 transitions. Second operand 5 states. [2018-09-14 17:22:22,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:22:22,936 INFO L93 Difference]: Finished difference Result 4038 states and 7427 transitions. [2018-09-14 17:22:22,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 17:22:22,940 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2018-09-14 17:22:22,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:22:22,954 INFO L225 Difference]: With dead ends: 4038 [2018-09-14 17:22:22,955 INFO L226 Difference]: Without dead ends: 2440 [2018-09-14 17:22:22,960 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-14 17:22:22,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2018-09-14 17:22:23,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2413. [2018-09-14 17:22:23,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2413 states. [2018-09-14 17:22:23,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 4141 transitions. [2018-09-14 17:22:23,034 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 4141 transitions. Word has length 127 [2018-09-14 17:22:23,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:22:23,035 INFO L480 AbstractCegarLoop]: Abstraction has 2413 states and 4141 transitions. [2018-09-14 17:22:23,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 17:22:23,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 4141 transitions. [2018-09-14 17:22:23,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-14 17:22:23,046 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:22:23,046 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:22:23,046 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:22:23,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1515805392, now seen corresponding path program 1 times [2018-09-14 17:22:23,047 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:22:23,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:22:23,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:22:23,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:22:23,048 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:22:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:22:23,399 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 17:22:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:22:23,463 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:22:23,464 INFO L197 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 [2018-09-14 17:22:23,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:22:23,476 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:22:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:22:23,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:22:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:22:23,796 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:22:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:22:24,176 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 17:22:24,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2018-09-14 17:22:24,176 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:22:24,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 17:22:24,177 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 17:22:24,178 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-14 17:22:24,178 INFO L87 Difference]: Start difference. First operand 2413 states and 4141 transitions. Second operand 3 states. [2018-09-14 17:22:33,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:22:33,815 INFO L93 Difference]: Finished difference Result 7156 states and 12477 transitions. [2018-09-14 17:22:33,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 17:22:33,822 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 129 [2018-09-14 17:22:33,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:22:33,854 INFO L225 Difference]: With dead ends: 7156 [2018-09-14 17:22:33,854 INFO L226 Difference]: Without dead ends: 4749 [2018-09-14 17:22:33,866 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 258 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-14 17:22:33,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4749 states. [2018-09-14 17:22:33,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4749 to 4749. [2018-09-14 17:22:33,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4749 states. [2018-09-14 17:22:34,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4749 states to 4749 states and 7195 transitions. [2018-09-14 17:22:34,002 INFO L78 Accepts]: Start accepts. Automaton has 4749 states and 7195 transitions. Word has length 129 [2018-09-14 17:22:34,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:22:34,004 INFO L480 AbstractCegarLoop]: Abstraction has 4749 states and 7195 transitions. [2018-09-14 17:22:34,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 17:22:34,004 INFO L276 IsEmpty]: Start isEmpty. Operand 4749 states and 7195 transitions. [2018-09-14 17:22:34,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-14 17:22:34,007 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:22:34,008 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:22:34,008 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:22:34,008 INFO L82 PathProgramCache]: Analyzing trace with hash 56708252, now seen corresponding path program 1 times [2018-09-14 17:22:34,012 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:22:34,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:22:34,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:22:34,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:22:34,013 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:22:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:22:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:22:34,252 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:22:34,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 17:22:34,252 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:22:34,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 17:22:34,253 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 17:22:34,253 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 17:22:34,253 INFO L87 Difference]: Start difference. First operand 4749 states and 7195 transitions. Second operand 6 states. [2018-09-14 17:22:46,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:22:46,216 INFO L93 Difference]: Finished difference Result 17482 states and 27226 transitions. [2018-09-14 17:22:46,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 17:22:46,222 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 135 [2018-09-14 17:22:46,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:22:46,286 INFO L225 Difference]: With dead ends: 17482 [2018-09-14 17:22:46,287 INFO L226 Difference]: Without dead ends: 12739 [2018-09-14 17:22:46,318 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 17:22:46,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12739 states. [2018-09-14 17:22:46,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12739 to 12652. [2018-09-14 17:22:46,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12652 states. [2018-09-14 17:22:46,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12652 states to 12652 states and 18756 transitions. [2018-09-14 17:22:46,661 INFO L78 Accepts]: Start accepts. Automaton has 12652 states and 18756 transitions. Word has length 135 [2018-09-14 17:22:46,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:22:46,662 INFO L480 AbstractCegarLoop]: Abstraction has 12652 states and 18756 transitions. [2018-09-14 17:22:46,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 17:22:46,662 INFO L276 IsEmpty]: Start isEmpty. Operand 12652 states and 18756 transitions. [2018-09-14 17:22:46,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-14 17:22:46,667 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:22:46,667 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:22:46,670 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:22:46,670 INFO L82 PathProgramCache]: Analyzing trace with hash -2138160203, now seen corresponding path program 1 times [2018-09-14 17:22:46,671 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:22:46,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:22:46,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:22:46,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:22:46,672 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:22:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:22:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:22:47,126 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:22:47,126 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 17:22:47,126 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:22:47,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 17:22:47,127 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 17:22:47,127 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 17:22:47,127 INFO L87 Difference]: Start difference. First operand 12652 states and 18756 transitions. Second operand 6 states. [2018-09-14 17:22:54,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:22:54,093 INFO L93 Difference]: Finished difference Result 28666 states and 43319 transitions. [2018-09-14 17:22:54,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 17:22:54,095 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 156 [2018-09-14 17:22:54,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:22:54,160 INFO L225 Difference]: With dead ends: 28666 [2018-09-14 17:22:54,160 INFO L226 Difference]: Without dead ends: 16020 [2018-09-14 17:22:54,205 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 17:22:54,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16020 states. [2018-09-14 17:22:54,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16020 to 15974. [2018-09-14 17:22:54,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15974 states. [2018-09-14 17:22:54,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15974 states to 15974 states and 22998 transitions. [2018-09-14 17:22:54,574 INFO L78 Accepts]: Start accepts. Automaton has 15974 states and 22998 transitions. Word has length 156 [2018-09-14 17:22:54,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:22:54,575 INFO L480 AbstractCegarLoop]: Abstraction has 15974 states and 22998 transitions. [2018-09-14 17:22:54,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 17:22:54,575 INFO L276 IsEmpty]: Start isEmpty. Operand 15974 states and 22998 transitions. [2018-09-14 17:22:54,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-14 17:22:54,583 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:22:54,583 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:22:54,583 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:22:54,584 INFO L82 PathProgramCache]: Analyzing trace with hash 802704968, now seen corresponding path program 1 times [2018-09-14 17:22:54,584 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:22:54,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:22:54,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:22:54,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:22:54,585 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:22:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:22:54,838 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 17:22:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:22:55,237 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:22:55,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 17:22:55,237 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:22:55,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 17:22:55,238 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 17:22:55,238 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 17:22:55,238 INFO L87 Difference]: Start difference. First operand 15974 states and 22998 transitions. Second operand 6 states. [2018-09-14 17:23:04,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:23:04,984 INFO L93 Difference]: Finished difference Result 33966 states and 49476 transitions. [2018-09-14 17:23:04,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 17:23:04,989 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 173 [2018-09-14 17:23:04,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:23:05,057 INFO L225 Difference]: With dead ends: 33966 [2018-09-14 17:23:05,057 INFO L226 Difference]: Without dead ends: 17998 [2018-09-14 17:23:05,096 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 17:23:05,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17998 states. [2018-09-14 17:23:05,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17998 to 17845. [2018-09-14 17:23:05,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17845 states. [2018-09-14 17:23:05,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17845 states to 17845 states and 24000 transitions. [2018-09-14 17:23:05,471 INFO L78 Accepts]: Start accepts. Automaton has 17845 states and 24000 transitions. Word has length 173 [2018-09-14 17:23:05,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:23:05,475 INFO L480 AbstractCegarLoop]: Abstraction has 17845 states and 24000 transitions. [2018-09-14 17:23:05,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 17:23:05,475 INFO L276 IsEmpty]: Start isEmpty. Operand 17845 states and 24000 transitions. [2018-09-14 17:23:05,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-09-14 17:23:05,483 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:23:05,484 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, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 17:23:05,484 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:23:05,484 INFO L82 PathProgramCache]: Analyzing trace with hash -349036039, now seen corresponding path program 1 times [2018-09-14 17:23:05,484 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:23:05,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:23:05,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:23:05,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:23:05,492 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:23:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:23:05,778 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 17:23:06,660 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 93 proven. 6 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-09-14 17:23:06,661 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:23:06,661 INFO L197 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 [2018-09-14 17:23:06,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:23:06,676 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:23:06,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:23:06,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:23:06,865 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-09-14 17:23:06,865 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:23:07,023 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-14 17:23:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-09-14 17:23:07,633 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 17:23:07,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [8] total 14 [2018-09-14 17:23:07,634 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:23:07,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 17:23:07,635 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 17:23:07,635 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-09-14 17:23:07,636 INFO L87 Difference]: Start difference. First operand 17845 states and 24000 transitions. Second operand 5 states. [2018-09-14 17:23:15,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:23:15,986 INFO L93 Difference]: Finished difference Result 53559 states and 74825 transitions. [2018-09-14 17:23:15,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 17:23:15,989 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 211 [2018-09-14 17:23:15,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:23:16,119 INFO L225 Difference]: With dead ends: 53559 [2018-09-14 17:23:16,119 INFO L226 Difference]: Without dead ends: 35720 [2018-09-14 17:23:16,159 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 416 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-09-14 17:23:16,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35720 states. [2018-09-14 17:23:16,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35720 to 35512. [2018-09-14 17:23:16,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35512 states. [2018-09-14 17:23:16,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35512 states to 35512 states and 45928 transitions. [2018-09-14 17:23:16,869 INFO L78 Accepts]: Start accepts. Automaton has 35512 states and 45928 transitions. Word has length 211 [2018-09-14 17:23:16,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:23:16,870 INFO L480 AbstractCegarLoop]: Abstraction has 35512 states and 45928 transitions. [2018-09-14 17:23:16,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 17:23:16,870 INFO L276 IsEmpty]: Start isEmpty. Operand 35512 states and 45928 transitions. [2018-09-14 17:23:16,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-09-14 17:23:16,884 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:23:16,885 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, 2, 2, 2, 2, 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] [2018-09-14 17:23:16,885 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:23:16,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1582239141, now seen corresponding path program 1 times [2018-09-14 17:23:16,885 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:23:16,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:23:16,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:23:16,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:23:16,886 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:23:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:23:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 92 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:23:17,285 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:23:17,286 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:23:17,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:23:17,300 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:23:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:23:17,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:23:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-09-14 17:23:17,585 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:23:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 92 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:23:18,717 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 17:23:18,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2018-09-14 17:23:18,717 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:23:18,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 17:23:18,718 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 17:23:18,718 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-09-14 17:23:18,718 INFO L87 Difference]: Start difference. First operand 35512 states and 45928 transitions. Second operand 5 states. [2018-09-14 17:23:32,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:23:32,249 INFO L93 Difference]: Finished difference Result 108428 states and 148840 transitions. [2018-09-14 17:23:32,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 17:23:32,250 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 249 [2018-09-14 17:23:32,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:23:32,479 INFO L225 Difference]: With dead ends: 108428 [2018-09-14 17:23:32,479 INFO L226 Difference]: Without dead ends: 72922 [2018-09-14 17:23:32,577 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 496 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-09-14 17:23:32,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72922 states. [2018-09-14 17:23:34,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72922 to 71949. [2018-09-14 17:23:34,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71949 states. [2018-09-14 17:23:34,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71949 states to 71949 states and 91971 transitions. [2018-09-14 17:23:34,182 INFO L78 Accepts]: Start accepts. Automaton has 71949 states and 91971 transitions. Word has length 249 [2018-09-14 17:23:34,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:23:34,183 INFO L480 AbstractCegarLoop]: Abstraction has 71949 states and 91971 transitions. [2018-09-14 17:23:34,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 17:23:34,183 INFO L276 IsEmpty]: Start isEmpty. Operand 71949 states and 91971 transitions. [2018-09-14 17:23:34,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-09-14 17:23:34,196 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:23:34,196 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, 2, 2, 2, 2, 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] [2018-09-14 17:23:34,197 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:23:34,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1930999894, now seen corresponding path program 1 times [2018-09-14 17:23:34,197 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:23:34,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:23:34,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:23:34,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:23:34,198 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:23:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:23:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-14 17:23:34,511 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:23:34,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-14 17:23:34,511 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:23:34,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 17:23:34,512 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 17:23:34,512 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 17:23:34,513 INFO L87 Difference]: Start difference. First operand 71949 states and 91971 transitions. Second operand 4 states. [2018-09-14 17:23:42,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:23:42,625 INFO L93 Difference]: Finished difference Result 171281 states and 227457 transitions. [2018-09-14 17:23:42,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 17:23:42,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 276 [2018-09-14 17:23:42,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:23:42,964 INFO L225 Difference]: With dead ends: 171281 [2018-09-14 17:23:42,964 INFO L226 Difference]: Without dead ends: 99338 [2018-09-14 17:23:43,118 INFO L604 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 [2018-09-14 17:23:43,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99338 states. [2018-09-14 17:23:44,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99338 to 99279. [2018-09-14 17:23:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99279 states. [2018-09-14 17:23:44,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99279 states to 99279 states and 125533 transitions. [2018-09-14 17:23:44,831 INFO L78 Accepts]: Start accepts. Automaton has 99279 states and 125533 transitions. Word has length 276 [2018-09-14 17:23:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:23:44,831 INFO L480 AbstractCegarLoop]: Abstraction has 99279 states and 125533 transitions. [2018-09-14 17:23:44,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 17:23:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 99279 states and 125533 transitions. [2018-09-14 17:23:44,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-09-14 17:23:44,872 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:23:44,875 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:23:44,875 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:23:44,876 INFO L82 PathProgramCache]: Analyzing trace with hash 2114558797, now seen corresponding path program 1 times [2018-09-14 17:23:44,876 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:23:44,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:23:44,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:23:44,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:23:44,880 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:23:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:23:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:23:45,242 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:23:45,242 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-14 17:23:45,242 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:23:45,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 17:23:45,243 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 17:23:45,243 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 17:23:45,244 INFO L87 Difference]: Start difference. First operand 99279 states and 125533 transitions. Second operand 4 states. [2018-09-14 17:23:54,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:23:54,163 INFO L93 Difference]: Finished difference Result 235072 states and 306144 transitions. [2018-09-14 17:23:54,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 17:23:54,164 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2018-09-14 17:23:54,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:23:54,727 INFO L225 Difference]: With dead ends: 235072 [2018-09-14 17:23:54,727 INFO L226 Difference]: Without dead ends: 135799 [2018-09-14 17:23:54,972 INFO L604 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 [2018-09-14 17:23:55,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135799 states. [2018-09-14 17:23:57,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135799 to 135734. [2018-09-14 17:23:57,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135734 states. [2018-09-14 17:23:57,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135734 states to 135734 states and 172610 transitions. [2018-09-14 17:23:57,722 INFO L78 Accepts]: Start accepts. Automaton has 135734 states and 172610 transitions. Word has length 328 [2018-09-14 17:23:57,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:23:57,722 INFO L480 AbstractCegarLoop]: Abstraction has 135734 states and 172610 transitions. [2018-09-14 17:23:57,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 17:23:57,723 INFO L276 IsEmpty]: Start isEmpty. Operand 135734 states and 172610 transitions. [2018-09-14 17:23:57,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2018-09-14 17:23:57,773 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:23:57,774 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 17:23:57,774 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:23:57,774 INFO L82 PathProgramCache]: Analyzing trace with hash -2027700998, now seen corresponding path program 1 times [2018-09-14 17:23:57,774 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:23:57,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:23:57,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:23:57,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:23:57,776 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:23:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:23:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 9 proven. 86 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2018-09-14 17:23:58,181 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:23:58,181 INFO L197 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 [2018-09-14 17:23:58,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:23:58,189 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:23:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:23:58,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:23:58,844 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2018-09-14 17:23:58,986 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-09-14 17:23:58,986 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:23:59,182 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2018-09-14 17:24:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 92 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:24:00,965 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 17:24:00,965 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2018-09-14 17:24:00,965 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:24:00,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 17:24:00,966 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 17:24:00,966 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-09-14 17:24:00,966 INFO L87 Difference]: Start difference. First operand 135734 states and 172610 transitions. Second operand 5 states. [2018-09-14 17:24:13,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:24:13,313 INFO L93 Difference]: Finished difference Result 288972 states and 368653 transitions. [2018-09-14 17:24:13,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-14 17:24:13,314 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 380 [2018-09-14 17:24:13,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:24:13,872 INFO L225 Difference]: With dead ends: 288972 [2018-09-14 17:24:13,872 INFO L226 Difference]: Without dead ends: 150916 [2018-09-14 17:24:14,059 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 758 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-09-14 17:24:14,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150916 states. [2018-09-14 17:24:15,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150916 to 149609. [2018-09-14 17:24:15,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149609 states. [2018-09-14 17:24:17,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149609 states to 149609 states and 188555 transitions. [2018-09-14 17:24:17,514 INFO L78 Accepts]: Start accepts. Automaton has 149609 states and 188555 transitions. Word has length 380 [2018-09-14 17:24:17,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:24:17,515 INFO L480 AbstractCegarLoop]: Abstraction has 149609 states and 188555 transitions. [2018-09-14 17:24:17,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 17:24:17,515 INFO L276 IsEmpty]: Start isEmpty. Operand 149609 states and 188555 transitions. [2018-09-14 17:24:17,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2018-09-14 17:24:17,552 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:24:17,553 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, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:24:17,553 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:24:17,553 INFO L82 PathProgramCache]: Analyzing trace with hash 760976397, now seen corresponding path program 1 times [2018-09-14 17:24:17,554 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:24:17,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:24:17,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:24:17,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:24:17,555 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:24:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:24:18,208 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 217 proven. 124 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-09-14 17:24:18,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:24:18,209 INFO L197 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 [2018-09-14 17:24:18,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:24:18,224 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:24:18,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:24:18,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:24:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 366 proven. 2 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-09-14 17:24:18,665 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:24:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 217 proven. 124 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-09-14 17:24:18,945 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:24:18,946 INFO L197 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 [2018-09-14 17:24:18,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:24:18,965 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:24:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:24:19,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:24:19,529 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 366 proven. 2 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-09-14 17:24:19,529 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:24:20,261 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 217 proven. 124 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-09-14 17:24:20,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:24:20,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-09-14 17:24:20,264 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:24:20,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 17:24:20,266 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 17:24:20,266 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-14 17:24:20,266 INFO L87 Difference]: Start difference. First operand 149609 states and 188555 transitions. Second operand 9 states. [2018-09-14 17:24:35,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:24:35,292 INFO L93 Difference]: Finished difference Result 304613 states and 426571 transitions. [2018-09-14 17:24:35,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-14 17:24:35,293 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 432 [2018-09-14 17:24:35,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:24:35,870 INFO L225 Difference]: With dead ends: 304613 [2018-09-14 17:24:35,870 INFO L226 Difference]: Without dead ends: 140150 [2018-09-14 17:24:36,152 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1754 GetRequests, 1729 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2018-09-14 17:24:36,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140150 states. [2018-09-14 17:24:38,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140150 to 137754. [2018-09-14 17:24:38,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137754 states. [2018-09-14 17:24:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137754 states to 137754 states and 177333 transitions. [2018-09-14 17:24:39,145 INFO L78 Accepts]: Start accepts. Automaton has 137754 states and 177333 transitions. Word has length 432 [2018-09-14 17:24:39,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:24:39,145 INFO L480 AbstractCegarLoop]: Abstraction has 137754 states and 177333 transitions. [2018-09-14 17:24:39,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 17:24:39,145 INFO L276 IsEmpty]: Start isEmpty. Operand 137754 states and 177333 transitions. [2018-09-14 17:24:39,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2018-09-14 17:24:39,189 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:24:39,189 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:24:39,189 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:24:39,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1453926586, now seen corresponding path program 1 times [2018-09-14 17:24:39,190 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:24:39,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:24:39,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:24:39,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:24:39,191 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:24:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:24:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 14 proven. 130 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2018-09-14 17:24:40,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:24:40,537 INFO L197 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 [2018-09-14 17:24:40,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:24:40,545 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:24:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:24:40,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:24:43,839 WARN L178 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2018-09-14 17:24:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 14 proven. 130 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2018-09-14 17:24:44,079 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:24:44,580 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2018-09-14 17:24:44,601 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 17:24:44,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 9 [2018-09-14 17:24:44,602 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:24:44,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 17:24:44,603 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 17:24:44,603 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=48, Unknown=1, NotChecked=0, Total=72 [2018-09-14 17:24:44,604 INFO L87 Difference]: Start difference. First operand 137754 states and 177333 transitions. Second operand 3 states. [2018-09-14 17:24:53,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:24:53,920 INFO L93 Difference]: Finished difference Result 288556 states and 379697 transitions. [2018-09-14 17:24:53,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 17:24:53,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 503 [2018-09-14 17:24:53,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:24:54,478 INFO L225 Difference]: With dead ends: 288556 [2018-09-14 17:24:54,479 INFO L226 Difference]: Without dead ends: 151576 [2018-09-14 17:24:54,842 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1018 GetRequests, 1007 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=23, Invalid=48, Unknown=1, NotChecked=0, Total=72 [2018-09-14 17:24:54,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151576 states. [2018-09-14 17:24:57,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151576 to 145375. [2018-09-14 17:24:57,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145375 states. [2018-09-14 17:24:57,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145375 states to 145375 states and 187097 transitions. [2018-09-14 17:24:57,927 INFO L78 Accepts]: Start accepts. Automaton has 145375 states and 187097 transitions. Word has length 503 [2018-09-14 17:24:57,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:24:57,928 INFO L480 AbstractCegarLoop]: Abstraction has 145375 states and 187097 transitions. [2018-09-14 17:24:57,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 17:24:57,929 INFO L276 IsEmpty]: Start isEmpty. Operand 145375 states and 187097 transitions. [2018-09-14 17:24:59,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 943 [2018-09-14 17:24:59,154 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:24:59,154 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:24:59,155 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:24:59,155 INFO L82 PathProgramCache]: Analyzing trace with hash -619208345, now seen corresponding path program 1 times [2018-09-14 17:24:59,155 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:24:59,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:24:59,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:24:59,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:24:59,157 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:24:59,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:24:59,999 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 144 proven. 280 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-09-14 17:24:59,999 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:24:59,999 INFO L197 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 [2018-09-14 17:25:00,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:25:00,007 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:25:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:25:00,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:25:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 449 proven. 2 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-09-14 17:25:01,039 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:25:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 248 proven. 106 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-09-14 17:25:01,722 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:25:01,722 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:25:01,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:25:01,738 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:25:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:25:02,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:25:03,036 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 345 proven. 2 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2018-09-14 17:25:03,036 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:25:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 146 proven. 243 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-09-14 17:25:03,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:25:03,850 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-14 17:25:03,851 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:25:03,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 17:25:03,853 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 17:25:03,853 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-14 17:25:03,853 INFO L87 Difference]: Start difference. First operand 145375 states and 187097 transitions. Second operand 9 states. [2018-09-14 17:25:17,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:25:17,074 INFO L93 Difference]: Finished difference Result 310788 states and 392797 transitions. [2018-09-14 17:25:17,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-14 17:25:17,074 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 942 [2018-09-14 17:25:17,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:25:17,667 INFO L225 Difference]: With dead ends: 310788 [2018-09-14 17:25:17,667 INFO L226 Difference]: Without dead ends: 159282 [2018-09-14 17:25:18,502 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3795 GetRequests, 3766 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2018-09-14 17:25:18,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159282 states. [2018-09-14 17:25:20,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159282 to 152703. [2018-09-14 17:25:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152703 states. [2018-09-14 17:25:20,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152703 states to 152703 states and 172788 transitions. [2018-09-14 17:25:20,279 INFO L78 Accepts]: Start accepts. Automaton has 152703 states and 172788 transitions. Word has length 942 [2018-09-14 17:25:20,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:25:20,279 INFO L480 AbstractCegarLoop]: Abstraction has 152703 states and 172788 transitions. [2018-09-14 17:25:20,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 17:25:20,279 INFO L276 IsEmpty]: Start isEmpty. Operand 152703 states and 172788 transitions. [2018-09-14 17:25:20,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1037 [2018-09-14 17:25:20,379 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:25:20,380 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:25:20,380 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:25:20,381 INFO L82 PathProgramCache]: Analyzing trace with hash 6729398, now seen corresponding path program 1 times [2018-09-14 17:25:20,381 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:25:20,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:25:20,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:25:20,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:25:20,382 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:25:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:25:22,311 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-09-14 17:25:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 525 proven. 205 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-09-14 17:25:24,314 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:25:24,314 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:25:24,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:25:24,322 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:25:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:25:24,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-14 17:25:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 535 proven. 2 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2018-09-14 17:25:25,780 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:25:25,782 WARN L186 SmtUtils]: Removed 1 from assertion stack [2018-09-14 17:25:25,783 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-14 17:25:25,984 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:25:25,985 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 17:25:25,990 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 17:25:25,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 05:25:25 BoogieIcfgContainer [2018-09-14 17:25:25,990 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 17:25:25,991 INFO L168 Benchmark]: Toolchain (without parser) took 220746.06 ms. Allocated memory was 1.5 GB in the beginning and 4.6 GB in the end (delta: 3.1 GB). Free memory was 1.4 GB in the beginning and 2.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-09-14 17:25:25,992 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. [2018-09-14 17:25:25,993 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2146.22 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 245.8 MB). Peak memory consumption was 245.8 MB. Max. memory is 7.1 GB. [2018-09-14 17:25:25,993 INFO L168 Benchmark]: Boogie Procedure Inliner took 262.05 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2018-09-14 17:25:25,994 INFO L168 Benchmark]: Boogie Preprocessor took 961.56 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 942.1 MB). Free memory was 1.1 GB in the beginning and 2.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 146.2 MB. Max. memory is 7.1 GB. [2018-09-14 17:25:25,995 INFO L168 Benchmark]: RCFGBuilder took 12385.83 ms. Allocated memory is still 2.5 GB. Free memory was 2.3 GB in the beginning and 1.7 GB in the end (delta: 651.8 MB). Peak memory consumption was 651.8 MB. Max. memory is 7.1 GB. [2018-09-14 17:25:25,996 INFO L168 Benchmark]: TraceAbstraction took 204983.74 ms. Allocated memory was 2.5 GB in the beginning and 4.6 GB in the end (delta: 2.1 GB). Free memory was 1.7 GB in the beginning and 2.7 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-09-14 17:25:26,001 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 2146.22 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 245.8 MB). Peak memory consumption was 245.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 262.05 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 961.56 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 942.1 MB). Free memory was 1.1 GB in the beginning and 2.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 146.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 12385.83 ms. Allocated memory is still 2.5 GB. Free memory was 2.3 GB in the beginning and 1.7 GB in the end (delta: 651.8 MB). Peak memory consumption was 651.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 204983.74 ms. Allocated memory was 2.5 GB in the beginning and 4.6 GB in the end (delta: 2.1 GB). Free memory was 1.7 GB in the beginning and 2.7 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 150]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 150). Cancelled while BasicCegarLoop was analyzing trace of length 1037 with TraceHistMax 5, while TraceCheckSpWp was constructing backward predicates, while PartialQuantifierElimination was doing sequential composition of 119 TransFormulas, while SimplifyDDAWithTimeout was simplifying term of DAG size 3. - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 840 locations, 1 error locations. TIMEOUT Result, 204.9s OverallTime, 15 OverallIterations, 5 TraceHistogramMax, 153.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 6548 SDtfs, 39421 SDslu, 2278 SDs, 0 SdLazy, 68696 SolverSat, 16303 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 113.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8601 GetRequests, 8446 SyntacticMatches, 33 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 10.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=152703occurred in iteration=14, 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: 19.5s AutomataMinimizationTime, 14 MinimizatonAttempts, 18101 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 20.2s InterpolantComputationTime, 8314 NumberOfCodeBlocks, 8314 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 12502 ConstructedInterpolants, 2 QuantifiedInterpolants, 18212288 SizeOfPredicates, 13 NumberOfNonLiveVariables, 6418 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 32 InterpolantComputations, 14 PerfectInterpolantSequences, 6761/8420 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem12_label24_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_17-25-26-017.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem12_label24_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_17-25-26-017.csv Completed graceful shutdown