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/Problem03_label44_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 07:17:57,209 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 07:17:57,212 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 07:17:57,230 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 07:17:57,230 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 07:17:57,231 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 07:17:57,233 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 07:17:57,236 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 07:17:57,238 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 07:17:57,242 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 07:17:57,244 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 07:17:57,244 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 07:17:57,246 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 07:17:57,247 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 07:17:57,258 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 07:17:57,259 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 07:17:57,259 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 07:17:57,264 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 07:17:57,266 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 07:17:57,268 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 07:17:57,269 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 07:17:57,270 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 07:17:57,272 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 07:17:57,272 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 07:17:57,272 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 07:17:57,273 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 07:17:57,274 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 07:17:57,275 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 07:17:57,276 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 07:17:57,277 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 07:17:57,277 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 07:17:57,278 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 07:17:57,278 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 07:17:57,278 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 07:17:57,279 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 07:17:57,280 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 07:17:57,281 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 07:17:57,306 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 07:17:57,306 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 07:17:57,309 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 07:17:57,310 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 07:17:57,310 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 07:17:57,310 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 07:17:57,310 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-07 07:17:57,310 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 07:17:57,311 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 07:17:57,311 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 07:17:57,311 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 07:17:57,311 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 07:17:57,311 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 07:17:57,312 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 07:17:57,312 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 07:17:57,312 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 07:17:57,313 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 07:17:57,313 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 07:17:57,313 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 07:17:57,313 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 07:17:57,313 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 07:17:57,314 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 07:17:57,314 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 07:17:57,314 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 07:17:57,314 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 07:17:57,314 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 07:17:57,315 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 07:17:57,315 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 07:17:57,315 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 07:17:57,315 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 07:17:57,316 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 07:17:57,316 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 07:17:57,316 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 07:17:57,316 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 07:17:57,316 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 07:17:57,316 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 07:17:57,365 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 07:17:57,381 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 07:17:57,385 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 07:17:57,386 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 07:17:57,387 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 07:17:57,388 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label44_true-unreach-call.c [2018-11-07 07:17:57,449 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47821b4e7/8c921e2d80b340d2b1a16e6963c553ef/FLAG42a06c134 [2018-11-07 07:17:58,128 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 07:17:58,129 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label44_true-unreach-call.c [2018-11-07 07:17:58,147 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47821b4e7/8c921e2d80b340d2b1a16e6963c553ef/FLAG42a06c134 [2018-11-07 07:17:58,164 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47821b4e7/8c921e2d80b340d2b1a16e6963c553ef [2018-11-07 07:17:58,176 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 07:17:58,178 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 07:17:58,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 07:17:58,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 07:17:58,183 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 07:17:58,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:17:58" (1/1) ... [2018-11-07 07:17:58,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42126e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:17:58, skipping insertion in model container [2018-11-07 07:17:58,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:17:58" (1/1) ... [2018-11-07 07:17:58,200 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 07:17:58,283 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 07:17:59,112 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 07:17:59,118 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 07:17:59,373 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 07:17:59,399 INFO L193 MainTranslator]: Completed translation [2018-11-07 07:17:59,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:17:59 WrapperNode [2018-11-07 07:17:59,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 07:17:59,401 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 07:17:59,401 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 07:17:59,402 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 07:17:59,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:17:59" (1/1) ... [2018-11-07 07:17:59,597 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:17:59" (1/1) ... [2018-11-07 07:17:59,616 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 07:17:59,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 07:17:59,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 07:17:59,617 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 07:17:59,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:17:59" (1/1) ... [2018-11-07 07:17:59,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:17:59" (1/1) ... [2018-11-07 07:17:59,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:17:59" (1/1) ... [2018-11-07 07:17:59,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:17:59" (1/1) ... [2018-11-07 07:17:59,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:17:59" (1/1) ... [2018-11-07 07:17:59,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:17:59" (1/1) ... [2018-11-07 07:17:59,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:17:59" (1/1) ... [2018-11-07 07:17:59,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 07:17:59,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 07:17:59,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 07:17:59,763 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 07:17:59,764 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:17:59" (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 07:17:59,833 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 07:17:59,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 07:17:59,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 07:17:59,834 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 07:17:59,834 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 07:17:59,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 07:17:59,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 07:17:59,834 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 07:17:59,835 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 07:18:05,184 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 07:18:05,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:18:05 BoogieIcfgContainer [2018-11-07 07:18:05,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 07:18:05,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 07:18:05,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 07:18:05,190 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 07:18:05,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:17:58" (1/3) ... [2018-11-07 07:18:05,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d39e5ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:18:05, skipping insertion in model container [2018-11-07 07:18:05,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:17:59" (2/3) ... [2018-11-07 07:18:05,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d39e5ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:18:05, skipping insertion in model container [2018-11-07 07:18:05,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:18:05" (3/3) ... [2018-11-07 07:18:05,194 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label44_true-unreach-call.c [2018-11-07 07:18:05,203 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 07:18:05,211 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 07:18:05,228 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 07:18:05,268 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 07:18:05,268 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 07:18:05,268 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 07:18:05,268 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 07:18:05,268 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 07:18:05,269 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 07:18:05,269 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 07:18:05,269 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 07:18:05,299 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-11-07 07:18:05,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-11-07 07:18:05,321 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:18:05,323 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:18:05,325 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:18:05,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:18:05,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1268744215, now seen corresponding path program 1 times [2018-11-07 07:18:05,333 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:18:05,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:05,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:18:05,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:05,391 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:18:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:18:06,586 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 07:18:06,589 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 07:18:06,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 07:18:06,590 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:18:06,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 07:18:06,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 07:18:06,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 07:18:06,617 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-11-07 07:18:09,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:18:09,983 INFO L93 Difference]: Finished difference Result 1086 states and 1949 transitions. [2018-11-07 07:18:09,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 07:18:09,987 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 184 [2018-11-07 07:18:09,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:18:10,012 INFO L225 Difference]: With dead ends: 1086 [2018-11-07 07:18:10,013 INFO L226 Difference]: Without dead ends: 768 [2018-11-07 07:18:10,020 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 07:18:10,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2018-11-07 07:18:10,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 525. [2018-11-07 07:18:10,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2018-11-07 07:18:10,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 910 transitions. [2018-11-07 07:18:10,117 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 910 transitions. Word has length 184 [2018-11-07 07:18:10,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:18:10,118 INFO L480 AbstractCegarLoop]: Abstraction has 525 states and 910 transitions. [2018-11-07 07:18:10,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 07:18:10,119 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 910 transitions. [2018-11-07 07:18:10,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-11-07 07:18:10,126 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:18:10,127 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:18:10,127 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:18:10,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:18:10,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1064364326, now seen corresponding path program 1 times [2018-11-07 07:18:10,128 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:18:10,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:10,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:18:10,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:10,130 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:18:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:18:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:18:10,455 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 07:18:10,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 07:18:10,455 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:18:10,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 07:18:10,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 07:18:10,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 07:18:10,458 INFO L87 Difference]: Start difference. First operand 525 states and 910 transitions. Second operand 5 states. [2018-11-07 07:18:13,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:18:13,795 INFO L93 Difference]: Finished difference Result 1613 states and 2895 transitions. [2018-11-07 07:18:13,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 07:18:13,795 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 195 [2018-11-07 07:18:13,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:18:13,808 INFO L225 Difference]: With dead ends: 1613 [2018-11-07 07:18:13,808 INFO L226 Difference]: Without dead ends: 1094 [2018-11-07 07:18:13,813 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 07:18:13,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2018-11-07 07:18:13,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 864. [2018-11-07 07:18:13,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 864 states. [2018-11-07 07:18:13,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1422 transitions. [2018-11-07 07:18:13,889 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1422 transitions. Word has length 195 [2018-11-07 07:18:13,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:18:13,889 INFO L480 AbstractCegarLoop]: Abstraction has 864 states and 1422 transitions. [2018-11-07 07:18:13,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 07:18:13,890 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1422 transitions. [2018-11-07 07:18:13,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-11-07 07:18:13,895 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:18:13,895 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:18:13,895 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:18:13,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:18:13,896 INFO L82 PathProgramCache]: Analyzing trace with hash -262902419, now seen corresponding path program 1 times [2018-11-07 07:18:13,896 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:18:13,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:13,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:18:13,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:13,898 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:18:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:18:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:18:14,229 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 07:18:14,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 07:18:14,231 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:18:14,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 07:18:14,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 07:18:14,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 07:18:14,234 INFO L87 Difference]: Start difference. First operand 864 states and 1422 transitions. Second operand 3 states. [2018-11-07 07:18:18,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:18:18,090 INFO L93 Difference]: Finished difference Result 2471 states and 4181 transitions. [2018-11-07 07:18:18,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 07:18:18,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 197 [2018-11-07 07:18:18,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:18:18,115 INFO L225 Difference]: With dead ends: 2471 [2018-11-07 07:18:18,116 INFO L226 Difference]: Without dead ends: 1613 [2018-11-07 07:18:18,122 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 07:18:18,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2018-11-07 07:18:18,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1610. [2018-11-07 07:18:18,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1610 states. [2018-11-07 07:18:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 2542 transitions. [2018-11-07 07:18:18,191 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 2542 transitions. Word has length 197 [2018-11-07 07:18:18,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:18:18,192 INFO L480 AbstractCegarLoop]: Abstraction has 1610 states and 2542 transitions. [2018-11-07 07:18:18,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 07:18:18,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 2542 transitions. [2018-11-07 07:18:18,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-11-07 07:18:18,202 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:18:18,202 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:18:18,202 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:18:18,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:18:18,204 INFO L82 PathProgramCache]: Analyzing trace with hash -128043501, now seen corresponding path program 1 times [2018-11-07 07:18:18,204 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:18:18,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:18,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:18:18,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:18,205 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:18:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:18:18,521 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-11-07 07:18:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 07:18:18,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:18:18,582 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:18:18,583 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 206 with the following transitions: [2018-11-07 07:18:18,586 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [10], [12], [13], [16], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [933], [935], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:18:18,652 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:18:18,652 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:18:19,812 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 07:18:19,814 INFO L272 AbstractInterpreter]: Visited 185 different actions 185 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-11-07 07:18:19,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:18:19,853 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 07:18:20,778 INFO L227 lantSequenceWeakener]: Weakened 194 states. On average, predicates are now at 73.4% of their original sizes. [2018-11-07 07:18:20,778 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 07:18:21,596 INFO L415 sIntCurrentIteration]: We unified 204 AI predicates to 204 [2018-11-07 07:18:21,596 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 07:18:21,597 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:18:21,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [6] total 24 [2018-11-07 07:18:21,597 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:18:21,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 07:18:21,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 07:18:21,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2018-11-07 07:18:21,599 INFO L87 Difference]: Start difference. First operand 1610 states and 2542 transitions. Second operand 20 states. [2018-11-07 07:18:49,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:18:49,354 INFO L93 Difference]: Finished difference Result 3424 states and 5418 transitions. [2018-11-07 07:18:49,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 07:18:49,354 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 205 [2018-11-07 07:18:49,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:18:49,364 INFO L225 Difference]: With dead ends: 3424 [2018-11-07 07:18:49,364 INFO L226 Difference]: Without dead ends: 1820 [2018-11-07 07:18:49,370 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 205 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2018-11-07 07:18:49,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2018-11-07 07:18:49,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1818. [2018-11-07 07:18:49,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1818 states. [2018-11-07 07:18:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 2758 transitions. [2018-11-07 07:18:49,417 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 2758 transitions. Word has length 205 [2018-11-07 07:18:49,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:18:49,418 INFO L480 AbstractCegarLoop]: Abstraction has 1818 states and 2758 transitions. [2018-11-07 07:18:49,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 07:18:49,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 2758 transitions. [2018-11-07 07:18:49,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-11-07 07:18:49,426 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:18:49,426 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:18:49,426 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:18:49,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:18:49,427 INFO L82 PathProgramCache]: Analyzing trace with hash 74938608, now seen corresponding path program 1 times [2018-11-07 07:18:49,427 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:18:49,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:49,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:18:49,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:49,429 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:18:49,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:18:49,705 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-11-07 07:18:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 07:18:49,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:18:49,825 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:18:49,825 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 218 with the following transitions: [2018-11-07 07:18:49,826 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [10], [12], [13], [16], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [933], [935], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:18:49,837 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:18:49,837 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:18:50,458 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 07:18:50,459 INFO L272 AbstractInterpreter]: Visited 189 different actions 372 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:18:50,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:18:50,497 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 07:18:51,137 INFO L227 lantSequenceWeakener]: Weakened 212 states. On average, predicates are now at 73.71% of their original sizes. [2018-11-07 07:18:51,138 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 07:18:52,184 INFO L415 sIntCurrentIteration]: We unified 216 AI predicates to 216 [2018-11-07 07:18:52,185 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 07:18:52,185 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:18:52,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [31] imperfect sequences [9] total 38 [2018-11-07 07:18:52,185 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:18:52,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-07 07:18:52,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-07 07:18:52,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2018-11-07 07:18:52,187 INFO L87 Difference]: Start difference. First operand 1818 states and 2758 transitions. Second operand 31 states. [2018-11-07 07:19:32,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:19:32,754 INFO L93 Difference]: Finished difference Result 3636 states and 5642 transitions. [2018-11-07 07:19:32,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-07 07:19:32,754 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 217 [2018-11-07 07:19:32,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:19:32,765 INFO L225 Difference]: With dead ends: 3636 [2018-11-07 07:19:32,765 INFO L226 Difference]: Without dead ends: 2032 [2018-11-07 07:19:32,771 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 225 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=279, Invalid=1281, Unknown=0, NotChecked=0, Total=1560 [2018-11-07 07:19:32,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2018-11-07 07:19:32,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 2029. [2018-11-07 07:19:32,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2029 states. [2018-11-07 07:19:32,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 2986 transitions. [2018-11-07 07:19:32,825 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 2986 transitions. Word has length 217 [2018-11-07 07:19:32,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:19:32,826 INFO L480 AbstractCegarLoop]: Abstraction has 2029 states and 2986 transitions. [2018-11-07 07:19:32,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-07 07:19:32,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 2986 transitions. [2018-11-07 07:19:32,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-11-07 07:19:32,834 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:19:32,834 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:19:32,834 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:19:32,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:19:32,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2031809899, now seen corresponding path program 1 times [2018-11-07 07:19:32,835 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:19:32,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:19:32,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:19:32,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:19:32,836 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:19:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:19:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:19:33,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:19:33,132 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:19:33,132 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 218 with the following transitions: [2018-11-07 07:19:33,133 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [10], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [933], [935], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:19:33,142 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:19:33,142 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:19:34,037 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:19:34,038 INFO L272 AbstractInterpreter]: Visited 190 different actions 371 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:19:34,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:19:34,043 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:19:34,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:19:34,043 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 07:19:34,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:19:34,053 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:19:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:19:34,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:19:34,446 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-07 07:19:34,446 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:19:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-07 07:19:34,708 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:19:34,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 7 [2018-11-07 07:19:34,709 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:19:34,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 07:19:34,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 07:19:34,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-07 07:19:34,710 INFO L87 Difference]: Start difference. First operand 2029 states and 2986 transitions. Second operand 3 states. [2018-11-07 07:19:35,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:19:35,505 INFO L93 Difference]: Finished difference Result 3632 states and 5525 transitions. [2018-11-07 07:19:35,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 07:19:35,506 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 217 [2018-11-07 07:19:35,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:19:35,515 INFO L225 Difference]: With dead ends: 3632 [2018-11-07 07:19:35,516 INFO L226 Difference]: Without dead ends: 2028 [2018-11-07 07:19:35,521 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-07 07:19:35,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2018-11-07 07:19:35,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 2028. [2018-11-07 07:19:35,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2028 states. [2018-11-07 07:19:35,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 2984 transitions. [2018-11-07 07:19:35,569 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 2984 transitions. Word has length 217 [2018-11-07 07:19:35,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:19:35,570 INFO L480 AbstractCegarLoop]: Abstraction has 2028 states and 2984 transitions. [2018-11-07 07:19:35,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 07:19:35,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 2984 transitions. [2018-11-07 07:19:35,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-11-07 07:19:35,578 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:19:35,579 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:19:35,579 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:19:35,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:19:35,579 INFO L82 PathProgramCache]: Analyzing trace with hash -860808213, now seen corresponding path program 1 times [2018-11-07 07:19:35,579 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:19:35,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:19:35,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:19:35,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:19:35,581 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:19:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:19:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:19:35,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:19:35,741 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:19:35,742 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 227 with the following transitions: [2018-11-07 07:19:35,742 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [56], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [933], [935], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:19:35,749 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:19:35,750 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:19:36,922 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:19:36,923 INFO L272 AbstractInterpreter]: Visited 189 different actions 563 times. Merged at 7 different actions 19 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 07:19:36,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:19:36,931 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:19:36,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:19:36,931 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 07:19:36,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:19:36,941 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:19:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:19:37,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:19:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:19:37,253 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:19:37,400 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-07 07:19:37,610 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:19:37,631 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:19:37,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2018-11-07 07:19:37,632 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:19:37,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 07:19:37,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 07:19:37,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-07 07:19:37,633 INFO L87 Difference]: Start difference. First operand 2028 states and 2984 transitions. Second operand 9 states. [2018-11-07 07:19:47,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:19:47,636 INFO L93 Difference]: Finished difference Result 14108 states and 27520 transitions. [2018-11-07 07:19:47,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-07 07:19:47,637 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 226 [2018-11-07 07:19:47,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:19:47,745 INFO L225 Difference]: With dead ends: 14108 [2018-11-07 07:19:47,745 INFO L226 Difference]: Without dead ends: 12505 [2018-11-07 07:19:47,790 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2018-11-07 07:19:47,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12505 states. [2018-11-07 07:19:48,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12505 to 12282. [2018-11-07 07:19:48,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12282 states. [2018-11-07 07:19:48,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12282 states to 12282 states and 18795 transitions. [2018-11-07 07:19:48,305 INFO L78 Accepts]: Start accepts. Automaton has 12282 states and 18795 transitions. Word has length 226 [2018-11-07 07:19:48,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:19:48,306 INFO L480 AbstractCegarLoop]: Abstraction has 12282 states and 18795 transitions. [2018-11-07 07:19:48,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 07:19:48,306 INFO L276 IsEmpty]: Start isEmpty. Operand 12282 states and 18795 transitions. [2018-11-07 07:19:48,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-11-07 07:19:48,347 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:19:48,347 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:19:48,347 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:19:48,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:19:48,348 INFO L82 PathProgramCache]: Analyzing trace with hash 575899775, now seen corresponding path program 1 times [2018-11-07 07:19:48,348 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:19:48,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:19:48,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:19:48,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:19:48,349 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:19:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:19:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:19:48,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:19:48,939 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:19:48,939 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 248 with the following transitions: [2018-11-07 07:19:48,940 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [147], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [933], [935], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:19:48,945 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:19:48,945 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:19:50,005 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:19:50,005 INFO L272 AbstractInterpreter]: Visited 189 different actions 370 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:19:50,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:19:50,046 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:19:50,046 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:19:50,046 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 07:19:50,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:19:50,059 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:19:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:19:50,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:19:50,451 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 07:19:50,452 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:19:50,703 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 07:19:50,728 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:19:50,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-11-07 07:19:50,728 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:19:50,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 07:19:50,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 07:19:50,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 07:19:50,730 INFO L87 Difference]: Start difference. First operand 12282 states and 18795 transitions. Second operand 3 states. [2018-11-07 07:19:52,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:19:52,561 INFO L93 Difference]: Finished difference Result 24292 states and 37469 transitions. [2018-11-07 07:19:52,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 07:19:52,563 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 247 [2018-11-07 07:19:52,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:19:52,649 INFO L225 Difference]: With dead ends: 24292 [2018-11-07 07:19:52,649 INFO L226 Difference]: Without dead ends: 15659 [2018-11-07 07:19:52,688 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 492 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 07:19:52,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15659 states. [2018-11-07 07:19:53,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15659 to 15442. [2018-11-07 07:19:53,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15442 states. [2018-11-07 07:19:53,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15442 states to 15442 states and 23649 transitions. [2018-11-07 07:19:53,203 INFO L78 Accepts]: Start accepts. Automaton has 15442 states and 23649 transitions. Word has length 247 [2018-11-07 07:19:53,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:19:53,204 INFO L480 AbstractCegarLoop]: Abstraction has 15442 states and 23649 transitions. [2018-11-07 07:19:53,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 07:19:53,204 INFO L276 IsEmpty]: Start isEmpty. Operand 15442 states and 23649 transitions. [2018-11-07 07:19:53,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-11-07 07:19:53,275 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:19:53,275 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:19:53,275 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:19:53,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:19:53,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1298758771, now seen corresponding path program 1 times [2018-11-07 07:19:53,276 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:19:53,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:19:53,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:19:53,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:19:53,278 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:19:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:19:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 125 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-07 07:19:53,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:19:53,802 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:19:53,803 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 296 with the following transitions: [2018-11-07 07:19:53,803 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [71], [75], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [260], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [933], [935], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:19:53,808 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:19:53,808 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:19:54,613 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:19:54,614 INFO L272 AbstractInterpreter]: Visited 190 different actions 378 times. Merged at 7 different actions 10 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 07:19:54,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:19:54,621 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:19:54,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:19:54,621 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 07:19:54,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:19:54,630 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:19:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:19:54,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:19:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-11-07 07:19:54,900 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:19:55,117 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-11-07 07:19:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 125 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-07 07:19:55,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:19:55,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2018-11-07 07:19:55,617 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:19:55,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 07:19:55,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 07:19:55,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-07 07:19:55,619 INFO L87 Difference]: Start difference. First operand 15442 states and 23649 transitions. Second operand 6 states. [2018-11-07 07:19:57,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:19:57,047 INFO L93 Difference]: Finished difference Result 29253 states and 45167 transitions. [2018-11-07 07:19:57,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-07 07:19:57,047 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 295 [2018-11-07 07:19:57,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:19:57,111 INFO L225 Difference]: With dead ends: 29253 [2018-11-07 07:19:57,112 INFO L226 Difference]: Without dead ends: 15096 [2018-11-07 07:19:57,144 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 589 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-11-07 07:19:57,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15096 states. [2018-11-07 07:19:57,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15096 to 15096. [2018-11-07 07:19:57,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15096 states. [2018-11-07 07:19:57,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15096 states to 15096 states and 22290 transitions. [2018-11-07 07:19:57,508 INFO L78 Accepts]: Start accepts. Automaton has 15096 states and 22290 transitions. Word has length 295 [2018-11-07 07:19:57,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:19:57,509 INFO L480 AbstractCegarLoop]: Abstraction has 15096 states and 22290 transitions. [2018-11-07 07:19:57,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 07:19:57,509 INFO L276 IsEmpty]: Start isEmpty. Operand 15096 states and 22290 transitions. [2018-11-07 07:19:57,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-11-07 07:19:57,566 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:19:57,566 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:19:57,567 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:19:57,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:19:57,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1270364605, now seen corresponding path program 1 times [2018-11-07 07:19:57,567 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:19:57,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:19:57,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:19:57,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:19:57,568 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:19:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:19:58,187 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 07:19:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 148 proven. 45 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-07 07:19:58,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:19:58,420 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:19:58,420 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 317 with the following transitions: [2018-11-07 07:19:58,421 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [174], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [260], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [933], [935], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:19:58,426 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:19:58,426 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:19:59,315 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:19:59,316 INFO L272 AbstractInterpreter]: Visited 190 different actions 378 times. Merged at 7 different actions 10 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 07:19:59,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:19:59,341 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:19:59,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:19:59,341 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 07:19:59,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:19:59,351 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:19:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:19:59,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:19:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 07:19:59,700 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:19:59,907 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 07:19:59,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:19:59,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-11-07 07:19:59,929 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:19:59,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 07:19:59,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 07:19:59,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-11-07 07:19:59,930 INFO L87 Difference]: Start difference. First operand 15096 states and 22290 transitions. Second operand 9 states. [2018-11-07 07:20:05,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:20:05,985 INFO L93 Difference]: Finished difference Result 31806 states and 50371 transitions. [2018-11-07 07:20:05,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-11-07 07:20:05,985 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 316 [2018-11-07 07:20:05,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:20:06,061 INFO L225 Difference]: With dead ends: 31806 [2018-11-07 07:20:06,061 INFO L226 Difference]: Without dead ends: 17135 [2018-11-07 07:20:06,105 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 716 GetRequests, 666 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=500, Invalid=1950, Unknown=0, NotChecked=0, Total=2450 [2018-11-07 07:20:06,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17135 states. [2018-11-07 07:20:06,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17135 to 16653. [2018-11-07 07:20:06,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16653 states. [2018-11-07 07:20:06,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16653 states to 16653 states and 22134 transitions. [2018-11-07 07:20:06,541 INFO L78 Accepts]: Start accepts. Automaton has 16653 states and 22134 transitions. Word has length 316 [2018-11-07 07:20:06,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:20:06,542 INFO L480 AbstractCegarLoop]: Abstraction has 16653 states and 22134 transitions. [2018-11-07 07:20:06,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 07:20:06,542 INFO L276 IsEmpty]: Start isEmpty. Operand 16653 states and 22134 transitions. [2018-11-07 07:20:06,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2018-11-07 07:20:06,573 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:20:06,573 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:06,573 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:20:06,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:20:06,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1861984996, now seen corresponding path program 1 times [2018-11-07 07:20:06,574 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:20:06,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:20:06,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:20:06,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:20:06,576 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:20:06,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:20:07,297 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 07:20:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 221 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:20:07,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:20:07,601 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:20:07,601 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 350 with the following transitions: [2018-11-07 07:20:07,602 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [260], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [933], [935], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:20:07,606 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:20:07,607 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:20:08,407 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:20:08,408 INFO L272 AbstractInterpreter]: Visited 189 different actions 371 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:20:08,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:20:08,444 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:20:08,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:20:08,445 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 07:20:08,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:20:08,457 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:20:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:20:08,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:20:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-11-07 07:20:08,775 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:20:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-11-07 07:20:08,884 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:20:08,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-11-07 07:20:08,885 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:20:08,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 07:20:08,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 07:20:08,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 07:20:08,886 INFO L87 Difference]: Start difference. First operand 16653 states and 22134 transitions. Second operand 3 states. [2018-11-07 07:20:10,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:20:10,162 INFO L93 Difference]: Finished difference Result 44423 states and 60068 transitions. [2018-11-07 07:20:10,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 07:20:10,162 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 349 [2018-11-07 07:20:10,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:20:10,250 INFO L225 Difference]: With dead ends: 44423 [2018-11-07 07:20:10,250 INFO L226 Difference]: Without dead ends: 28195 [2018-11-07 07:20:10,292 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 698 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 07:20:10,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28195 states. [2018-11-07 07:20:10,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28195 to 28155. [2018-11-07 07:20:10,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28155 states. [2018-11-07 07:20:10,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28155 states to 28155 states and 36977 transitions. [2018-11-07 07:20:10,853 INFO L78 Accepts]: Start accepts. Automaton has 28155 states and 36977 transitions. Word has length 349 [2018-11-07 07:20:10,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:20:10,854 INFO L480 AbstractCegarLoop]: Abstraction has 28155 states and 36977 transitions. [2018-11-07 07:20:10,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 07:20:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 28155 states and 36977 transitions. [2018-11-07 07:20:10,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2018-11-07 07:20:10,908 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:20:10,909 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, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:10,909 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:20:10,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:20:10,909 INFO L82 PathProgramCache]: Analyzing trace with hash -542953889, now seen corresponding path program 1 times [2018-11-07 07:20:10,909 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:20:10,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:20:10,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:20:10,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:20:10,912 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:20:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:20:11,625 WARN L179 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 07:20:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 262 proven. 38 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-11-07 07:20:11,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:20:11,763 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:20:11,763 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 389 with the following transitions: [2018-11-07 07:20:11,763 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [139], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [260], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [933], [935], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:20:11,767 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:20:11,768 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:20:12,363 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:20:12,363 INFO L272 AbstractInterpreter]: Visited 190 different actions 379 times. Merged at 7 different actions 11 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 07:20:12,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:20:12,369 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:20:12,369 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:20:12,369 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 07:20:12,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:20:12,379 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:20:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:20:12,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:20:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 274 proven. 2 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-11-07 07:20:12,790 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:20:13,073 WARN L179 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-11-07 07:20:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 208 proven. 68 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-11-07 07:20:13,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:20:13,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2018-11-07 07:20:13,731 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:20:13,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 07:20:13,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 07:20:13,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-11-07 07:20:13,733 INFO L87 Difference]: Start difference. First operand 28155 states and 36977 transitions. Second operand 12 states. [2018-11-07 07:20:22,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:20:22,542 INFO L93 Difference]: Finished difference Result 91923 states and 125152 transitions. [2018-11-07 07:20:22,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-11-07 07:20:22,542 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 388 [2018-11-07 07:20:22,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:20:22,727 INFO L225 Difference]: With dead ends: 91923 [2018-11-07 07:20:22,727 INFO L226 Difference]: Without dead ends: 64191 [2018-11-07 07:20:22,807 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 907 GetRequests, 828 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2094 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1085, Invalid=5235, Unknown=0, NotChecked=0, Total=6320 [2018-11-07 07:20:22,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64191 states. [2018-11-07 07:20:24,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64191 to 62944. [2018-11-07 07:20:24,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62944 states. [2018-11-07 07:20:24,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62944 states to 62944 states and 80309 transitions. [2018-11-07 07:20:24,439 INFO L78 Accepts]: Start accepts. Automaton has 62944 states and 80309 transitions. Word has length 388 [2018-11-07 07:20:24,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:20:24,440 INFO L480 AbstractCegarLoop]: Abstraction has 62944 states and 80309 transitions. [2018-11-07 07:20:24,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-07 07:20:24,440 INFO L276 IsEmpty]: Start isEmpty. Operand 62944 states and 80309 transitions. [2018-11-07 07:20:24,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2018-11-07 07:20:24,513 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:20:24,513 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:24,513 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:20:24,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:20:24,514 INFO L82 PathProgramCache]: Analyzing trace with hash 695166582, now seen corresponding path program 1 times [2018-11-07 07:20:24,514 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:20:24,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:20:24,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:20:24,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:20:24,515 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:20:24,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:20:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 239 proven. 20 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-11-07 07:20:25,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:20:25,082 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:20:25,082 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 419 with the following transitions: [2018-11-07 07:20:25,082 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [52], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [139], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [260], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [933], [935], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:20:25,087 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:20:25,087 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:20:25,588 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:20:25,588 INFO L272 AbstractInterpreter]: Visited 192 different actions 383 times. Merged at 7 different actions 11 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 07:20:25,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:20:25,596 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:20:25,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:20:25,596 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 07:20:25,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:20:25,606 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:20:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:20:25,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:20:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 303 proven. 4 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-11-07 07:20:26,445 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:20:26,810 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 263 proven. 44 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-11-07 07:20:26,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:20:26,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2018-11-07 07:20:26,832 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:20:26,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 07:20:26,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 07:20:26,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-11-07 07:20:26,833 INFO L87 Difference]: Start difference. First operand 62944 states and 80309 transitions. Second operand 8 states. [2018-11-07 07:20:33,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:20:33,771 INFO L93 Difference]: Finished difference Result 168517 states and 237898 transitions. [2018-11-07 07:20:33,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-07 07:20:33,772 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 418 [2018-11-07 07:20:33,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:20:34,378 INFO L225 Difference]: With dead ends: 168517 [2018-11-07 07:20:34,378 INFO L226 Difference]: Without dead ends: 121779 [2018-11-07 07:20:34,531 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 849 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2018-11-07 07:20:34,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121779 states. [2018-11-07 07:20:37,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121779 to 117689. [2018-11-07 07:20:37,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117689 states. [2018-11-07 07:20:37,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117689 states to 117689 states and 146545 transitions. [2018-11-07 07:20:37,599 INFO L78 Accepts]: Start accepts. Automaton has 117689 states and 146545 transitions. Word has length 418 [2018-11-07 07:20:37,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:20:37,599 INFO L480 AbstractCegarLoop]: Abstraction has 117689 states and 146545 transitions. [2018-11-07 07:20:37,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-07 07:20:37,599 INFO L276 IsEmpty]: Start isEmpty. Operand 117689 states and 146545 transitions. [2018-11-07 07:20:37,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2018-11-07 07:20:37,738 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:20:37,739 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:37,739 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:20:37,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:20:37,740 INFO L82 PathProgramCache]: Analyzing trace with hash -145355276, now seen corresponding path program 1 times [2018-11-07 07:20:37,740 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:20:37,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:20:37,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:20:37,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:20:37,741 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:20:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:20:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 258 proven. 101 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-11-07 07:20:38,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:20:38,902 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:20:38,902 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 425 with the following transitions: [2018-11-07 07:20:38,903 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [174], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [240], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [491], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [933], [935], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:20:38,907 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:20:38,907 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:20:39,430 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:20:39,430 INFO L272 AbstractInterpreter]: Visited 191 different actions 380 times. Merged at 7 different actions 10 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 07:20:39,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:20:39,440 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:20:39,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:20:39,440 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 07:20:39,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:20:39,449 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:20:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:20:39,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:20:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 242 proven. 2 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2018-11-07 07:20:39,910 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:20:40,189 WARN L179 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-11-07 07:20:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 243 proven. 146 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-11-07 07:20:40,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:20:40,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2018-11-07 07:20:40,546 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:20:40,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 07:20:40,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 07:20:40,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-11-07 07:20:40,548 INFO L87 Difference]: Start difference. First operand 117689 states and 146545 transitions. Second operand 12 states. [2018-11-07 07:20:56,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:20:56,430 INFO L93 Difference]: Finished difference Result 359247 states and 467051 transitions. [2018-11-07 07:20:56,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-11-07 07:20:56,430 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 424 [2018-11-07 07:20:56,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:20:57,130 INFO L225 Difference]: With dead ends: 359247 [2018-11-07 07:20:57,130 INFO L226 Difference]: Without dead ends: 217040 [2018-11-07 07:20:57,392 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1009 GetRequests, 916 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3283 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1398, Invalid=7532, Unknown=0, NotChecked=0, Total=8930 [2018-11-07 07:20:57,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217040 states. [2018-11-07 07:21:01,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217040 to 207278. [2018-11-07 07:21:01,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207278 states. [2018-11-07 07:21:01,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207278 states to 207278 states and 241085 transitions. [2018-11-07 07:21:01,809 INFO L78 Accepts]: Start accepts. Automaton has 207278 states and 241085 transitions. Word has length 424 [2018-11-07 07:21:01,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:21:01,810 INFO L480 AbstractCegarLoop]: Abstraction has 207278 states and 241085 transitions. [2018-11-07 07:21:01,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-07 07:21:01,810 INFO L276 IsEmpty]: Start isEmpty. Operand 207278 states and 241085 transitions. [2018-11-07 07:21:01,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2018-11-07 07:21:01,914 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:21:01,914 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:01,914 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:21:01,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:21:01,915 INFO L82 PathProgramCache]: Analyzing trace with hash 75709712, now seen corresponding path program 1 times [2018-11-07 07:21:01,915 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:21:01,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:21:01,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:21:01,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:21:01,916 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:21:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:21:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 322 proven. 194 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-07 07:21:02,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:21:02,556 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:21:02,556 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 484 with the following transitions: [2018-11-07 07:21:02,557 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [174], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [491], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [543], [548], [550], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [933], [935], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:21:02,561 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:21:02,561 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:21:03,687 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:21:03,688 INFO L272 AbstractInterpreter]: Visited 193 different actions 770 times. Merged at 9 different actions 35 times. Widened at 1 different actions 1 times. Found 7 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 07:21:03,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:21:03,697 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:21:03,697 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:21:03,697 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 07:21:03,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:21:03,706 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:21:03,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:21:04,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:21:04,965 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 404 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-11-07 07:21:04,965 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:21:05,090 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-11-07 07:21:05,315 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2018-11-07 07:21:05,379 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-11-07 07:21:05,686 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 354 proven. 45 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-11-07 07:21:05,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:21:05,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2018-11-07 07:21:05,708 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:21:05,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 07:21:05,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 07:21:05,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2018-11-07 07:21:05,710 INFO L87 Difference]: Start difference. First operand 207278 states and 241085 transitions. Second operand 12 states. [2018-11-07 07:21:20,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:21:20,640 INFO L93 Difference]: Finished difference Result 405205 states and 472159 transitions. [2018-11-07 07:21:20,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-11-07 07:21:20,641 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 483 [2018-11-07 07:21:20,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:21:21,208 INFO L225 Difference]: With dead ends: 405205 [2018-11-07 07:21:21,208 INFO L226 Difference]: Without dead ends: 198449 [2018-11-07 07:21:21,486 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1058 GetRequests, 1002 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=577, Invalid=2615, Unknown=0, NotChecked=0, Total=3192 [2018-11-07 07:21:21,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198449 states. [2018-11-07 07:21:24,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198449 to 194927. [2018-11-07 07:21:24,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194927 states. [2018-11-07 07:21:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194927 states to 194927 states and 218186 transitions. [2018-11-07 07:21:24,681 INFO L78 Accepts]: Start accepts. Automaton has 194927 states and 218186 transitions. Word has length 483 [2018-11-07 07:21:24,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:21:24,682 INFO L480 AbstractCegarLoop]: Abstraction has 194927 states and 218186 transitions. [2018-11-07 07:21:24,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-07 07:21:24,682 INFO L276 IsEmpty]: Start isEmpty. Operand 194927 states and 218186 transitions. [2018-11-07 07:21:24,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2018-11-07 07:21:24,775 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:21:24,775 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:21:24,775 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:21:24,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:21:24,776 INFO L82 PathProgramCache]: Analyzing trace with hash -943628700, now seen corresponding path program 1 times [2018-11-07 07:21:24,776 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:21:24,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:21:24,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:21:24,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:21:24,777 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:21:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:21:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 340 proven. 155 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-11-07 07:21:25,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:21:25,431 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:21:25,431 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 493 with the following transitions: [2018-11-07 07:21:25,432 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [127], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [174], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [491], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [933], [935], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:21:25,436 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:21:25,436 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:21:25,977 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:21:25,978 INFO L272 AbstractInterpreter]: Visited 190 different actions 372 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:21:25,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:21:25,985 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:21:25,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:21:25,985 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 07:21:26,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:21:26,867 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:21:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:21:27,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:21:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 373 proven. 2 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2018-11-07 07:21:27,372 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:21:27,639 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 309 proven. 211 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-11-07 07:21:27,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:21:27,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2018-11-07 07:21:27,661 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:21:27,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 07:21:27,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 07:21:27,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-11-07 07:21:27,662 INFO L87 Difference]: Start difference. First operand 194927 states and 218186 transitions. Second operand 10 states. Received shutdown request... [2018-11-07 07:21:33,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 07:21:33,000 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 07:21:33,006 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 07:21:33,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 07:21:33 BoogieIcfgContainer [2018-11-07 07:21:33,006 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 07:21:33,007 INFO L168 Benchmark]: Toolchain (without parser) took 214830.47 ms. Allocated memory was 1.6 GB in the beginning and 4.9 GB in the end (delta: 3.4 GB). Free memory was 1.5 GB in the beginning and 3.7 GB in the end (delta: -2.2 GB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. [2018-11-07 07:21:33,008 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 07:21:33,008 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1221.80 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-11-07 07:21:33,010 INFO L168 Benchmark]: Boogie Procedure Inliner took 214.85 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 770.2 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -900.1 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. [2018-11-07 07:21:33,011 INFO L168 Benchmark]: Boogie Preprocessor took 146.21 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2018-11-07 07:21:33,012 INFO L168 Benchmark]: RCFGBuilder took 5422.18 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 236.8 MB). Peak memory consumption was 236.8 MB. Max. memory is 7.1 GB. [2018-11-07 07:21:33,012 INFO L168 Benchmark]: TraceAbstraction took 207820.11 ms. Allocated memory was 2.3 GB in the beginning and 4.9 GB in the end (delta: 2.6 GB). Free memory was 2.0 GB in the beginning and 3.7 GB in the end (delta: -1.6 GB). Peak memory consumption was 2.9 GB. Max. memory is 7.1 GB. [2018-11-07 07:21:33,017 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1221.80 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 214.85 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 770.2 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -900.1 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 146.21 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5422.18 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 236.8 MB). Peak memory consumption was 236.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 207820.11 ms. Allocated memory was 2.3 GB in the beginning and 4.9 GB in the end (delta: 2.6 GB). Free memory was 2.0 GB in the beginning and 3.7 GB in the end (delta: -1.6 GB). Peak memory consumption was 2.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1566]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1566). Cancelled while BasicCegarLoop was constructing difference of abstraction (194927states) and FLOYD_HOARE automaton (currently 17 states, 10 states before enhancement),while ReachableStatesComputation was computing reachable states (299963 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 207.7s OverallTime, 16 OverallIterations, 6 TraceHistogramMax, 155.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3697 SDtfs, 32345 SDslu, 6096 SDs, 0 SdLazy, 47564 SolverSat, 10898 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 83.3s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 8773 GetRequests, 8313 SyntacticMatches, 13 SemanticMatches, 447 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8015 ImplicationChecksByTransitivity, 14.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=207278occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 11.0s AbstIntTime, 13 AbstIntIterations, 2 AbstIntStrong, 0.9989647173510491 AbsIntWeakeningRatio, 0.33095238095238094 AbsIntAvgWeakeningVarsNumRemoved, 58.416666666666664 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 15.0s AutomataMinimizationTime, 15 MinimizatonAttempts, 20064 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.8s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 14.6s InterpolantComputationTime, 8708 NumberOfCodeBlocks, 8708 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 12525 ConstructedInterpolants, 0 QuantifiedInterpolants, 11177896 SizeOfPredicates, 37 NumberOfNonLiveVariables, 14751 ConjunctsInSsa, 103 ConjunctsInUnsatCore, 38 InterpolantComputations, 9 PerfectInterpolantSequences, 8349/9511 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown