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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label55_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 08:34:27,280 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 08:34:27,282 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 08:34:27,300 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 08:34:27,300 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 08:34:27,302 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 08:34:27,303 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 08:34:27,306 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 08:34:27,309 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 08:34:27,310 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 08:34:27,311 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 08:34:27,318 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 08:34:27,319 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 08:34:27,320 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 08:34:27,321 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 08:34:27,322 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 08:34:27,323 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 08:34:27,324 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 08:34:27,326 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 08:34:27,328 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 08:34:27,329 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 08:34:27,330 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 08:34:27,332 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 08:34:27,332 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 08:34:27,332 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 08:34:27,337 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 08:34:27,339 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 08:34:27,339 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 08:34:27,342 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 08:34:27,344 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 08:34:27,344 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 08:34:27,345 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 08:34:27,345 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 08:34:27,345 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 08:34:27,348 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 08:34:27,349 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 08:34:27,350 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-11-07 08:34:27,382 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 08:34:27,382 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 08:34:27,384 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 08:34:27,384 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 08:34:27,384 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 08:34:27,384 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 08:34:27,387 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-07 08:34:27,387 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 08:34:27,387 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 08:34:27,387 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 08:34:27,388 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 08:34:27,388 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 08:34:27,388 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 08:34:27,388 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 08:34:27,389 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 08:34:27,389 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 08:34:27,389 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 08:34:27,389 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 08:34:27,391 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 08:34:27,391 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 08:34:27,391 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 08:34:27,391 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 08:34:27,391 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 08:34:27,392 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 08:34:27,392 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 08:34:27,392 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 08:34:27,392 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 08:34:27,392 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 08:34:27,392 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 08:34:27,393 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 08:34:27,393 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 08:34:27,393 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 08:34:27,393 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 08:34:27,394 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 08:34:27,394 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 08:34:27,394 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 08:34:27,454 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 08:34:27,471 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 08:34:27,475 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 08:34:27,476 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 08:34:27,477 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 08:34:27,477 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label55_true-unreach-call.c [2018-11-07 08:34:27,544 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc7f0ce1d/5da7204b2e074e879fef374860ef047b/FLAGd4536c1bc [2018-11-07 08:34:28,133 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 08:34:28,134 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label55_true-unreach-call.c [2018-11-07 08:34:28,168 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc7f0ce1d/5da7204b2e074e879fef374860ef047b/FLAGd4536c1bc [2018-11-07 08:34:28,190 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc7f0ce1d/5da7204b2e074e879fef374860ef047b [2018-11-07 08:34:28,202 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 08:34:28,203 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 08:34:28,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 08:34:28,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 08:34:28,209 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 08:34:28,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:34:28" (1/1) ... [2018-11-07 08:34:28,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c298bd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:28, skipping insertion in model container [2018-11-07 08:34:28,213 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:34:28" (1/1) ... [2018-11-07 08:34:28,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 08:34:28,289 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 08:34:28,915 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 08:34:28,919 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 08:34:29,106 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 08:34:29,125 INFO L193 MainTranslator]: Completed translation [2018-11-07 08:34:29,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:29 WrapperNode [2018-11-07 08:34:29,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 08:34:29,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 08:34:29,127 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 08:34:29,127 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 08:34:29,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:29" (1/1) ... [2018-11-07 08:34:29,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:29" (1/1) ... [2018-11-07 08:34:29,218 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 08:34:29,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 08:34:29,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 08:34:29,219 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 08:34:29,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:29" (1/1) ... [2018-11-07 08:34:29,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:29" (1/1) ... [2018-11-07 08:34:29,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:29" (1/1) ... [2018-11-07 08:34:29,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:29" (1/1) ... [2018-11-07 08:34:29,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:29" (1/1) ... [2018-11-07 08:34:29,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:29" (1/1) ... [2018-11-07 08:34:29,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:29" (1/1) ... [2018-11-07 08:34:29,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 08:34:29,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 08:34:29,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 08:34:29,365 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 08:34:29,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:29" (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 [2018-11-07 08:34:29,555 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 08:34:29,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 08:34:29,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 08:34:29,557 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 08:34:29,557 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 08:34:29,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 08:34:29,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 08:34:29,557 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 08:34:29,558 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 08:34:34,060 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 08:34:34,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:34:34 BoogieIcfgContainer [2018-11-07 08:34:34,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 08:34:34,064 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 08:34:34,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 08:34:34,068 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 08:34:34,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:34:28" (1/3) ... [2018-11-07 08:34:34,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1accaee4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:34:34, skipping insertion in model container [2018-11-07 08:34:34,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:29" (2/3) ... [2018-11-07 08:34:34,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1accaee4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:34:34, skipping insertion in model container [2018-11-07 08:34:34,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:34:34" (3/3) ... [2018-11-07 08:34:34,077 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label55_true-unreach-call.c [2018-11-07 08:34:34,087 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 08:34:34,098 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 08:34:34,118 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 08:34:34,168 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 08:34:34,168 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 08:34:34,168 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 08:34:34,168 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 08:34:34,169 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 08:34:34,169 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 08:34:34,169 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 08:34:34,169 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 08:34:34,215 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-11-07 08:34:34,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-07 08:34:34,227 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:34:34,228 INFO L375 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] [2018-11-07 08:34:34,230 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:34:34,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:34:34,239 INFO L82 PathProgramCache]: Analyzing trace with hash 2008695804, now seen corresponding path program 1 times [2018-11-07 08:34:34,242 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:34:34,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:34:34,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:34:34,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:34:34,302 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:34:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:34:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:34:34,794 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:34:34,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 08:34:34,795 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:34:34,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 08:34:34,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 08:34:34,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 08:34:34,820 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 4 states. [2018-11-07 08:34:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:34:38,242 INFO L93 Difference]: Finished difference Result 979 states and 1754 transitions. [2018-11-07 08:34:38,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 08:34:38,246 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2018-11-07 08:34:38,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:34:38,269 INFO L225 Difference]: With dead ends: 979 [2018-11-07 08:34:38,269 INFO L226 Difference]: Without dead ends: 680 [2018-11-07 08:34:38,277 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 08:34:38,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2018-11-07 08:34:38,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 484. [2018-11-07 08:34:38,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-11-07 08:34:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 730 transitions. [2018-11-07 08:34:38,364 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 730 transitions. Word has length 52 [2018-11-07 08:34:38,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:34:38,365 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 730 transitions. [2018-11-07 08:34:38,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 08:34:38,365 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 730 transitions. [2018-11-07 08:34:38,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-07 08:34:38,372 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:34:38,373 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:34:38,373 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:34:38,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:34:38,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1306963893, now seen corresponding path program 1 times [2018-11-07 08:34:38,374 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:34:38,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:34:38,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:34:38,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:34:38,376 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:34:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:34:38,772 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 08:34:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:34:38,874 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:34:38,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 08:34:38,874 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:34:38,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 08:34:38,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 08:34:38,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 08:34:38,877 INFO L87 Difference]: Start difference. First operand 484 states and 730 transitions. Second operand 6 states. [2018-11-07 08:34:42,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:34:42,806 INFO L93 Difference]: Finished difference Result 1555 states and 2493 transitions. [2018-11-07 08:34:42,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 08:34:42,811 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2018-11-07 08:34:42,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:34:42,823 INFO L225 Difference]: With dead ends: 1555 [2018-11-07 08:34:42,824 INFO L226 Difference]: Without dead ends: 1077 [2018-11-07 08:34:42,827 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 08:34:42,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2018-11-07 08:34:42,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 1063. [2018-11-07 08:34:42,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1063 states. [2018-11-07 08:34:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1592 transitions. [2018-11-07 08:34:42,902 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1592 transitions. Word has length 125 [2018-11-07 08:34:42,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:34:42,903 INFO L480 AbstractCegarLoop]: Abstraction has 1063 states and 1592 transitions. [2018-11-07 08:34:42,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 08:34:42,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1592 transitions. [2018-11-07 08:34:42,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-11-07 08:34:42,908 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:34:42,908 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:34:42,909 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:34:42,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:34:42,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1349379296, now seen corresponding path program 1 times [2018-11-07 08:34:42,909 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:34:42,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:34:42,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:34:42,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:34:42,911 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:34:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:34:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:34:43,200 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:34:43,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 08:34:43,200 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:34:43,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 08:34:43,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 08:34:43,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 08:34:43,202 INFO L87 Difference]: Start difference. First operand 1063 states and 1592 transitions. Second operand 4 states. [2018-11-07 08:34:46,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:34:46,349 INFO L93 Difference]: Finished difference Result 2907 states and 4465 transitions. [2018-11-07 08:34:46,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 08:34:46,350 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2018-11-07 08:34:46,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:34:46,372 INFO L225 Difference]: With dead ends: 2907 [2018-11-07 08:34:46,372 INFO L226 Difference]: Without dead ends: 1850 [2018-11-07 08:34:46,379 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 08:34:46,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2018-11-07 08:34:46,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1646. [2018-11-07 08:34:46,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1646 states. [2018-11-07 08:34:46,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2436 transitions. [2018-11-07 08:34:46,454 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2436 transitions. Word has length 126 [2018-11-07 08:34:46,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:34:46,455 INFO L480 AbstractCegarLoop]: Abstraction has 1646 states and 2436 transitions. [2018-11-07 08:34:46,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 08:34:46,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2436 transitions. [2018-11-07 08:34:46,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-11-07 08:34:46,467 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:34:46,467 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:34:46,468 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:34:46,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:34:46,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1663032705, now seen corresponding path program 1 times [2018-11-07 08:34:46,468 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:34:46,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:34:46,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:34:46,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:34:46,471 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:34:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:34:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:34:47,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:34:47,295 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:34:47,296 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 148 with the following transitions: [2018-11-07 08:34:47,298 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [594], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:34:47,348 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:34:47,348 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:34:48,031 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 08:34:48,033 INFO L272 AbstractInterpreter]: Visited 99 different actions 99 times. Never merged. Never widened. Never found a fixpoint. Largest state had 28 variables. [2018-11-07 08:34:48,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:34:48,078 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 08:34:48,676 INFO L227 lantSequenceWeakener]: Weakened 141 states. On average, predicates are now at 73.8% of their original sizes. [2018-11-07 08:34:48,677 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 08:34:48,928 INFO L415 sIntCurrentIteration]: We unified 146 AI predicates to 146 [2018-11-07 08:34:48,929 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 08:34:48,930 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 08:34:48,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2018-11-07 08:34:48,930 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:34:48,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 08:34:48,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 08:34:48,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 08:34:48,932 INFO L87 Difference]: Start difference. First operand 1646 states and 2436 transitions. Second operand 6 states. [2018-11-07 08:35:12,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:35:12,771 INFO L93 Difference]: Finished difference Result 3478 states and 5113 transitions. [2018-11-07 08:35:12,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 08:35:12,771 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 147 [2018-11-07 08:35:12,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:35:12,782 INFO L225 Difference]: With dead ends: 3478 [2018-11-07 08:35:12,783 INFO L226 Difference]: Without dead ends: 1838 [2018-11-07 08:35:12,789 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-07 08:35:12,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2018-11-07 08:35:12,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1836. [2018-11-07 08:35:12,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1836 states. [2018-11-07 08:35:12,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 2636 transitions. [2018-11-07 08:35:12,840 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 2636 transitions. Word has length 147 [2018-11-07 08:35:12,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:35:12,841 INFO L480 AbstractCegarLoop]: Abstraction has 1836 states and 2636 transitions. [2018-11-07 08:35:12,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 08:35:12,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 2636 transitions. [2018-11-07 08:35:12,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-11-07 08:35:12,847 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:35:12,848 INFO L375 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:35:12,848 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:35:12,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:35:12,849 INFO L82 PathProgramCache]: Analyzing trace with hash 639193526, now seen corresponding path program 1 times [2018-11-07 08:35:12,849 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:35:12,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:35:12,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:35:12,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:35:12,850 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:35:12,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:35:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-11-07 08:35:13,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:35:13,472 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:35:13,472 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 265 with the following transitions: [2018-11-07 08:35:13,472 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:35:13,479 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:35:13,479 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:35:13,975 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:35:13,975 INFO L272 AbstractInterpreter]: Visited 126 different actions 375 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 08:35:13,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:35:13,982 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:35:13,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:35:13,982 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:35:13,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:35:13,994 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:35:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:35:14,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:35:14,703 WARN L179 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2018-11-07 08:35:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-11-07 08:35:15,146 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:35:15,444 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-11-07 08:35:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-11-07 08:35:16,469 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 08:35:16,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 11 [2018-11-07 08:35:16,470 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:35:16,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 08:35:16,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 08:35:16,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-11-07 08:35:16,472 INFO L87 Difference]: Start difference. First operand 1836 states and 2636 transitions. Second operand 6 states. [2018-11-07 08:35:20,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:35:20,523 INFO L93 Difference]: Finished difference Result 5773 states and 9013 transitions. [2018-11-07 08:35:20,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 08:35:20,524 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 264 [2018-11-07 08:35:20,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:35:20,557 INFO L225 Difference]: With dead ends: 5773 [2018-11-07 08:35:20,557 INFO L226 Difference]: Without dead ends: 4133 [2018-11-07 08:35:20,577 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 523 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-11-07 08:35:20,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4133 states. [2018-11-07 08:35:20,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4133 to 4133. [2018-11-07 08:35:20,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4133 states. [2018-11-07 08:35:20,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4133 states to 4133 states and 6246 transitions. [2018-11-07 08:35:20,717 INFO L78 Accepts]: Start accepts. Automaton has 4133 states and 6246 transitions. Word has length 264 [2018-11-07 08:35:20,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:35:20,718 INFO L480 AbstractCegarLoop]: Abstraction has 4133 states and 6246 transitions. [2018-11-07 08:35:20,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 08:35:20,718 INFO L276 IsEmpty]: Start isEmpty. Operand 4133 states and 6246 transitions. [2018-11-07 08:35:20,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-11-07 08:35:20,730 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:35:20,730 INFO L375 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 08:35:20,731 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:35:20,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:35:20,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1866650356, now seen corresponding path program 1 times [2018-11-07 08:35:20,731 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:35:20,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:35:20,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:35:20,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:35:20,737 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:35:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:35:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:35:21,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:35:21,392 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:35:21,393 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 288 with the following transitions: [2018-11-07 08:35:21,393 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [618], [621], [625], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:35:21,401 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:35:21,402 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:35:21,928 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:35:21,928 INFO L272 AbstractInterpreter]: Visited 141 different actions 409 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 08:35:21,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:35:21,966 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:35:21,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:35:21,966 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:35:21,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:35:21,984 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:35:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:35:22,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:35:22,260 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-11-07 08:35:22,260 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:35:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-11-07 08:35:22,550 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 08:35:22,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-11-07 08:35:22,551 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:35:22,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 08:35:22,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 08:35:22,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-07 08:35:22,553 INFO L87 Difference]: Start difference. First operand 4133 states and 6246 transitions. Second operand 3 states. [2018-11-07 08:35:25,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:35:25,967 INFO L93 Difference]: Finished difference Result 11265 states and 17956 transitions. [2018-11-07 08:35:25,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 08:35:25,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 287 [2018-11-07 08:35:25,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:35:26,025 INFO L225 Difference]: With dead ends: 11265 [2018-11-07 08:35:26,026 INFO L226 Difference]: Without dead ends: 7328 [2018-11-07 08:35:26,069 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 574 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-07 08:35:26,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7328 states. [2018-11-07 08:35:26,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7328 to 7320. [2018-11-07 08:35:26,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7320 states. [2018-11-07 08:35:26,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7320 states to 7320 states and 10427 transitions. [2018-11-07 08:35:26,310 INFO L78 Accepts]: Start accepts. Automaton has 7320 states and 10427 transitions. Word has length 287 [2018-11-07 08:35:26,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:35:26,310 INFO L480 AbstractCegarLoop]: Abstraction has 7320 states and 10427 transitions. [2018-11-07 08:35:26,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 08:35:26,311 INFO L276 IsEmpty]: Start isEmpty. Operand 7320 states and 10427 transitions. [2018-11-07 08:35:26,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-11-07 08:35:26,345 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:35:26,346 INFO L375 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 08:35:26,346 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:35:26,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:35:26,347 INFO L82 PathProgramCache]: Analyzing trace with hash 2118604793, now seen corresponding path program 1 times [2018-11-07 08:35:26,347 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:35:26,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:35:26,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:35:26,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:35:26,348 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:35:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:35:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-11-07 08:35:26,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:35:26,956 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:35:26,956 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 361 with the following transitions: [2018-11-07 08:35:26,956 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [870], [874], [878], [889], [893], [897], [901], [905], [909], [913], [924], [928], [932], [936], [940], [944], [948], [952], [956], [960], [971], [975], [979], [983], [987], [991], [994], [999], [1001], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:35:26,963 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:35:26,963 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:35:27,619 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:35:27,619 INFO L272 AbstractInterpreter]: Visited 187 different actions 736 times. Merged at 7 different actions 24 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 08:35:27,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:35:27,659 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:35:27,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:35:27,659 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-07 08:35:27,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:35:27,681 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:35:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:35:27,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:35:31,060 WARN L179 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2018-11-07 08:35:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 11 proven. 86 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-11-07 08:35:31,255 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:35:31,818 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:31,889 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:32,048 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:32,156 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:32,199 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:32,255 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:32,306 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:32,349 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:32,384 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:32,425 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:32,491 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:32,533 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:32,732 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:32,795 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:32,832 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:33,025 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:33,077 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:33,115 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:33,159 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:33,301 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:33,337 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:33,383 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:33,435 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:33,480 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:33,516 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:33,578 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:33,613 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:33,651 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:33,729 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:33,767 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:33,805 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:33,852 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:33,889 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:33,962 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:34,002 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:34,104 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:34,438 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:34,757 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:34,795 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:34,847 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:34,884 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:34,919 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:34,956 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:35,217 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:35,361 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:35,397 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:35,439 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:35,474 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:35,509 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:35,546 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:35,586 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:35,620 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:35,673 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:35,710 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:35,745 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:36,067 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:36,391 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:36,435 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:36,471 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:36,524 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:36,558 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:36,596 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:36,632 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:36,670 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:36,721 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:36,771 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:36,810 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:36,863 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:36,910 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:36,976 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:37,019 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:37,053 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:37,088 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:37,414 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:37,529 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:37,571 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:37,606 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:37,641 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:37,676 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:37,713 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:37,752 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:37,790 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:37,846 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:37,880 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:37,914 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:37,953 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:38,018 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:38,054 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:38,119 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:38,155 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:38,191 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:38,226 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:38,263 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:38,299 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:38,333 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:38,368 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:38,404 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:38,440 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:38,481 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:38,601 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:38,637 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:38,673 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:38,721 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:38,755 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:39,083 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:39,397 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:39,730 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:39,831 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:39,867 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:39,972 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:40,297 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:40,628 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:40,708 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:40,745 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:40,787 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:41,110 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:41,199 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:41,255 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:41,292 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:41,329 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:41,366 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:41,419 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:41,456 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:41,492 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:41,530 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:41,565 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:41,602 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:41,637 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:41,676 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:41,799 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:41,849 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:41,904 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:41,947 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:41,994 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,057 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,091 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,131 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,182 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,217 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,255 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,292 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,331 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,368 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,405 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,440 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,476 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,509 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,545 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,579 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,616 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,649 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,683 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,717 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,752 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,785 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,822 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,865 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,899 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,933 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:42,967 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:43,001 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:43,053 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:43,087 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:43,122 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:43,155 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:43,188 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:43,224 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:35:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 93 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:35:44,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 08:35:44,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2018-11-07 08:35:44,715 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 08:35:44,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-07 08:35:44,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-07 08:35:44,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2018-11-07 08:35:44,717 INFO L87 Difference]: Start difference. First operand 7320 states and 10427 transitions. Second operand 16 states. [2018-11-07 08:35:48,475 WARN L179 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 35 [2018-11-07 08:36:04,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:36:04,826 INFO L93 Difference]: Finished difference Result 32440 states and 58049 transitions. [2018-11-07 08:36:04,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-07 08:36:04,827 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 360 [2018-11-07 08:36:04,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:36:05,123 INFO L225 Difference]: With dead ends: 32440 [2018-11-07 08:36:05,123 INFO L226 Difference]: Without dead ends: 25316 [2018-11-07 08:36:05,251 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 764 GetRequests, 544 SyntacticMatches, 168 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=743, Invalid=2119, Unknown=0, NotChecked=0, Total=2862 [2018-11-07 08:36:05,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25316 states. [2018-11-07 08:36:06,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25316 to 24550. [2018-11-07 08:36:06,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24550 states. [2018-11-07 08:36:06,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24550 states to 24550 states and 35686 transitions. [2018-11-07 08:36:06,409 INFO L78 Accepts]: Start accepts. Automaton has 24550 states and 35686 transitions. Word has length 360 [2018-11-07 08:36:06,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:36:06,410 INFO L480 AbstractCegarLoop]: Abstraction has 24550 states and 35686 transitions. [2018-11-07 08:36:06,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-07 08:36:06,410 INFO L276 IsEmpty]: Start isEmpty. Operand 24550 states and 35686 transitions. [2018-11-07 08:36:06,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2018-11-07 08:36:06,566 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:36:06,566 INFO L375 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:36:06,567 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:36:06,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:36:06,567 INFO L82 PathProgramCache]: Analyzing trace with hash 10779233, now seen corresponding path program 1 times [2018-11-07 08:36:06,567 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:36:06,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:36:06,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:36:06,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:36:06,570 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:36:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:36:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 334 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-07 08:36:07,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:36:07,207 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:36:07,208 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 399 with the following transitions: [2018-11-07 08:36:07,208 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [538], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [854], [859], [861], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:36:07,213 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:36:07,214 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:36:07,886 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:36:07,886 INFO L272 AbstractInterpreter]: Visited 156 different actions 615 times. Merged at 7 different actions 26 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 08:36:07,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:36:07,924 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:36:07,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:36:07,924 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:36:07,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:36:07,942 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:36:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:36:08,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:36:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 334 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-07 08:36:08,293 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:36:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 334 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-07 08:36:08,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 08:36:08,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-07 08:36:08,806 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 08:36:08,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 08:36:08,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 08:36:08,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 08:36:08,809 INFO L87 Difference]: Start difference. First operand 24550 states and 35686 transitions. Second operand 7 states. [2018-11-07 08:36:12,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:36:12,056 INFO L93 Difference]: Finished difference Result 64476 states and 101937 transitions. [2018-11-07 08:36:12,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 08:36:12,057 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 398 [2018-11-07 08:36:12,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:36:12,265 INFO L225 Difference]: With dead ends: 64476 [2018-11-07 08:36:12,266 INFO L226 Difference]: Without dead ends: 40122 [2018-11-07 08:36:12,435 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 797 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2018-11-07 08:36:12,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40122 states. [2018-11-07 08:36:13,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40122 to 39581. [2018-11-07 08:36:13,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39581 states. [2018-11-07 08:36:13,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39581 states to 39581 states and 58032 transitions. [2018-11-07 08:36:13,723 INFO L78 Accepts]: Start accepts. Automaton has 39581 states and 58032 transitions. Word has length 398 [2018-11-07 08:36:13,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:36:13,724 INFO L480 AbstractCegarLoop]: Abstraction has 39581 states and 58032 transitions. [2018-11-07 08:36:13,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 08:36:13,725 INFO L276 IsEmpty]: Start isEmpty. Operand 39581 states and 58032 transitions. [2018-11-07 08:36:13,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2018-11-07 08:36:13,954 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:36:13,954 INFO L375 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:36:13,955 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:36:13,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:36:13,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1320224044, now seen corresponding path program 1 times [2018-11-07 08:36:13,955 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:36:13,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:36:13,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:36:13,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:36:13,956 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:36:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:36:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 360 proven. 99 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-07 08:36:14,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:36:14,776 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:36:14,777 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 430 with the following transitions: [2018-11-07 08:36:14,777 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [629], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [854], [859], [861], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:36:14,781 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:36:14,781 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:36:15,397 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:36:15,397 INFO L272 AbstractInterpreter]: Visited 156 different actions 462 times. Merged at 7 different actions 18 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 08:36:15,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:36:15,434 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:36:15,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:36:15,434 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:36:15,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:36:15,451 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:36:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:36:15,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:36:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 365 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-11-07 08:36:15,750 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:36:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 365 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-11-07 08:36:16,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 08:36:16,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2018-11-07 08:36:16,277 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 08:36:16,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 08:36:16,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 08:36:16,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-07 08:36:16,278 INFO L87 Difference]: Start difference. First operand 39581 states and 58032 transitions. Second operand 6 states. [2018-11-07 08:36:18,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:36:18,651 INFO L93 Difference]: Finished difference Result 84820 states and 133129 transitions. [2018-11-07 08:36:18,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 08:36:18,651 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 429 [2018-11-07 08:36:18,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:36:18,970 INFO L225 Difference]: With dead ends: 84820 [2018-11-07 08:36:18,970 INFO L226 Difference]: Without dead ends: 45435 [2018-11-07 08:36:19,182 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 871 GetRequests, 859 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-11-07 08:36:19,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45435 states. [2018-11-07 08:36:20,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45435 to 44441. [2018-11-07 08:36:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44441 states. [2018-11-07 08:36:20,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44441 states to 44441 states and 59571 transitions. [2018-11-07 08:36:20,538 INFO L78 Accepts]: Start accepts. Automaton has 44441 states and 59571 transitions. Word has length 429 [2018-11-07 08:36:20,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:36:20,539 INFO L480 AbstractCegarLoop]: Abstraction has 44441 states and 59571 transitions. [2018-11-07 08:36:20,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 08:36:20,539 INFO L276 IsEmpty]: Start isEmpty. Operand 44441 states and 59571 transitions. [2018-11-07 08:36:20,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2018-11-07 08:36:20,759 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:36:20,760 INFO L375 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:36:20,760 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:36:20,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:36:20,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1633679686, now seen corresponding path program 1 times [2018-11-07 08:36:20,761 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:36:20,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:36:20,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:36:20,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:36:20,762 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:36:20,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:36:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 141 proven. 234 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2018-11-07 08:36:21,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:36:21,362 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:36:21,363 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 441 with the following transitions: [2018-11-07 08:36:21,363 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [653], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [854], [859], [861], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:36:21,367 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:36:21,367 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:36:22,230 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:36:22,230 INFO L272 AbstractInterpreter]: Visited 160 different actions 632 times. Merged at 8 different actions 30 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 08:36:22,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:36:22,240 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:36:22,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:36:22,240 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:36:22,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:36:22,251 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:36:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:36:22,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:36:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 328 proven. 107 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-07 08:36:24,562 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:36:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 374 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:36:25,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 08:36:25,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2018-11-07 08:36:25,593 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 08:36:25,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 08:36:25,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 08:36:25,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=177, Unknown=2, NotChecked=0, Total=240 [2018-11-07 08:36:25,594 INFO L87 Difference]: Start difference. First operand 44441 states and 59571 transitions. Second operand 11 states. [2018-11-07 08:37:26,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:37:26,425 INFO L93 Difference]: Finished difference Result 115842 states and 171853 transitions. [2018-11-07 08:37:26,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-07 08:37:26,425 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 440 [2018-11-07 08:37:26,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:37:26,945 INFO L225 Difference]: With dead ends: 115842 [2018-11-07 08:37:26,945 INFO L226 Difference]: Without dead ends: 71596 [2018-11-07 08:37:27,180 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 927 GetRequests, 887 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=307, Invalid=871, Unknown=12, NotChecked=0, Total=1190 [2018-11-07 08:37:27,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71596 states. [2018-11-07 08:37:29,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71596 to 68647. [2018-11-07 08:37:29,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68647 states. [2018-11-07 08:37:30,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68647 states to 68647 states and 93016 transitions. [2018-11-07 08:37:30,048 INFO L78 Accepts]: Start accepts. Automaton has 68647 states and 93016 transitions. Word has length 440 [2018-11-07 08:37:30,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:37:30,049 INFO L480 AbstractCegarLoop]: Abstraction has 68647 states and 93016 transitions. [2018-11-07 08:37:30,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-07 08:37:30,049 INFO L276 IsEmpty]: Start isEmpty. Operand 68647 states and 93016 transitions. [2018-11-07 08:37:30,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2018-11-07 08:37:30,293 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:37:30,294 INFO L375 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:37:30,294 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:37:30,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:37:30,295 INFO L82 PathProgramCache]: Analyzing trace with hash 825658629, now seen corresponding path program 1 times [2018-11-07 08:37:30,295 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:37:30,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:37:30,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:37:30,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:37:30,296 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:37:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:37:30,932 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 08:37:31,134 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 08:37:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 255 proven. 94 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-11-07 08:37:32,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:37:32,062 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:37:32,063 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 442 with the following transitions: [2018-11-07 08:37:32,063 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [870], [874], [878], [889], [893], [897], [901], [905], [909], [913], [924], [928], [932], [936], [940], [944], [948], [952], [956], [960], [971], [975], [979], [983], [987], [991], [1002], [1005], [1008], [1012], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:37:32,066 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:37:32,067 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:37:32,900 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:37:32,901 INFO L272 AbstractInterpreter]: Visited 187 different actions 741 times. Merged at 8 different actions 30 times. Never widened. Found 7 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 08:37:32,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:37:32,909 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:37:32,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:37:32,909 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:37:32,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:37:32,919 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:37:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:37:33,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:37:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 394 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-07 08:37:34,128 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:37:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 255 proven. 94 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-11-07 08:37:35,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 08:37:35,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 8] total 22 [2018-11-07 08:37:35,162 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 08:37:35,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 08:37:35,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 08:37:35,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2018-11-07 08:37:35,164 INFO L87 Difference]: Start difference. First operand 68647 states and 93016 transitions. Second operand 17 states. [2018-11-07 08:37:36,858 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2018-11-07 08:37:38,057 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2018-11-07 08:37:38,562 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2018-11-07 08:37:39,757 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-11-07 08:37:43,331 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2018-11-07 08:37:45,087 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-11-07 08:37:47,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:37:47,136 INFO L93 Difference]: Finished difference Result 149152 states and 212115 transitions. [2018-11-07 08:37:47,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-07 08:37:47,136 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 441 [2018-11-07 08:37:47,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:37:47,475 INFO L225 Difference]: With dead ends: 149152 [2018-11-07 08:37:47,475 INFO L226 Difference]: Without dead ends: 80700 [2018-11-07 08:37:47,821 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 912 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1091, Invalid=3331, Unknown=0, NotChecked=0, Total=4422 [2018-11-07 08:37:47,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80700 states. [2018-11-07 08:37:49,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80700 to 79642. [2018-11-07 08:37:49,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79642 states. [2018-11-07 08:37:50,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79642 states to 79642 states and 106287 transitions. [2018-11-07 08:37:50,704 INFO L78 Accepts]: Start accepts. Automaton has 79642 states and 106287 transitions. Word has length 441 [2018-11-07 08:37:50,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:37:50,704 INFO L480 AbstractCegarLoop]: Abstraction has 79642 states and 106287 transitions. [2018-11-07 08:37:50,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 08:37:50,705 INFO L276 IsEmpty]: Start isEmpty. Operand 79642 states and 106287 transitions. [2018-11-07 08:37:50,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2018-11-07 08:37:50,923 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:37:50,923 INFO L375 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:37:50,924 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:37:50,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:37:50,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1575379774, now seen corresponding path program 1 times [2018-11-07 08:37:50,925 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:37:50,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:37:50,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:37:50,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:37:50,926 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:37:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:37:51,960 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 145 proven. 320 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-07 08:37:51,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:37:51,960 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:37:51,960 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 473 with the following transitions: [2018-11-07 08:37:51,961 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [869], [870], [874], [878], [889], [893], [897], [901], [905], [909], [913], [924], [928], [932], [936], [940], [944], [948], [952], [956], [960], [971], [975], [979], [983], [987], [991], [1002], [1005], [1008], [1012], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:37:51,964 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:37:51,964 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:37:52,744 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:37:52,745 INFO L272 AbstractInterpreter]: Visited 187 different actions 741 times. Merged at 8 different actions 30 times. Never widened. Found 7 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 08:37:52,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:37:52,753 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:37:52,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:37:52,753 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:37:52,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:37:52,763 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:37:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:37:52,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:37:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 326 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-11-07 08:37:53,286 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:37:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 326 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-11-07 08:37:54,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 08:37:54,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2018-11-07 08:37:54,484 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 08:37:54,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 08:37:54,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 08:37:54,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2018-11-07 08:37:54,486 INFO L87 Difference]: Start difference. First operand 79642 states and 106287 transitions. Second operand 12 states. [2018-11-07 08:37:55,488 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 16 Received shutdown request... [2018-11-07 08:38:06,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-11-07 08:38:06,234 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 08:38:06,240 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 08:38:06,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:38:06 BoogieIcfgContainer [2018-11-07 08:38:06,241 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 08:38:06,242 INFO L168 Benchmark]: Toolchain (without parser) took 218039.13 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.2 GB). Peak memory consumption was 843.9 MB. Max. memory is 7.1 GB. [2018-11-07 08:38:06,243 INFO L168 Benchmark]: CDTParser took 0.20 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. [2018-11-07 08:38:06,243 INFO L168 Benchmark]: CACSL2BoogieTranslator took 921.33 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2018-11-07 08:38:06,244 INFO L168 Benchmark]: Boogie Procedure Inliner took 92.19 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 103.3 MB). Free memory was 1.3 GB in the beginning and 1.6 GB in the end (delta: -214.5 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2018-11-07 08:38:06,245 INFO L168 Benchmark]: Boogie Preprocessor took 145.15 ms. Allocated memory is still 1.6 GB. Free memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2018-11-07 08:38:06,246 INFO L168 Benchmark]: RCFGBuilder took 4698.92 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 712.0 MB). Free memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: -517.5 MB). Peak memory consumption was 211.0 MB. Max. memory is 7.1 GB. [2018-11-07 08:38:06,247 INFO L168 Benchmark]: TraceAbstraction took 212176.29 ms. Allocated memory was 2.3 GB in the beginning and 3.5 GB in the end (delta: 1.2 GB). Free memory was 2.1 GB in the beginning and 2.6 GB in the end (delta: -509.1 MB). Peak memory consumption was 683.2 MB. Max. memory is 7.1 GB. [2018-11-07 08:38:06,252 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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 921.33 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 92.19 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 103.3 MB). Free memory was 1.3 GB in the beginning and 1.6 GB in the end (delta: -214.5 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 145.15 ms. Allocated memory is still 1.6 GB. Free memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4698.92 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 712.0 MB). Free memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: -517.5 MB). Peak memory consumption was 211.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 212176.29 ms. Allocated memory was 2.3 GB in the beginning and 3.5 GB in the end (delta: 1.2 GB). Free memory was 2.1 GB in the beginning and 2.6 GB in the end (delta: -509.1 MB). Peak memory consumption was 683.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 141]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 141). Cancelled while BasicCegarLoop was constructing difference of abstraction (79642states) and FLOYD_HOARE automaton (currently 56 states, 12 states before enhancement),while ReachableStatesComputation was computing reachable states (113721 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 212.0s OverallTime, 12 OverallIterations, 4 TraceHistogramMax, 155.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2409 SDtfs, 19227 SDslu, 3742 SDs, 0 SdLazy, 35249 SolverSat, 8185 SolverUnsat, 52 SolverUnknown, 0 SolverNotchecked, 111.1s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 6677 GetRequests, 6229 SyntacticMatches, 190 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4880 ImplicationChecksByTransitivity, 41.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79642occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 6.4s AbstIntTime, 9 AbstIntIterations, 1 AbstIntStrong, 0.9978284158763612 AbsIntWeakeningRatio, 0.1506849315068493 AbsIntAvgWeakeningVarsNumRemoved, 18.335616438356166 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 10.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 6732 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 34.0s InterpolantComputationTime, 6632 NumberOfCodeBlocks, 6632 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 9695 ConstructedInterpolants, 430 QuantifiedInterpolants, 27662775 SizeOfPredicates, 21 NumberOfNonLiveVariables, 4962 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 28 InterpolantComputations, 6 PerfectInterpolantSequences, 7137/8751 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown