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-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label51_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 17:25:00,217 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 17:25:00,220 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 17:25:00,238 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 17:25:00,238 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 17:25:00,239 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 17:25:00,242 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 17:25:00,244 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 17:25:00,247 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 17:25:00,249 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 17:25:00,250 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 17:25:00,250 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 17:25:00,252 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 17:25:00,253 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 17:25:00,254 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 17:25:00,255 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 17:25:00,256 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 17:25:00,258 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 17:25:00,260 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 17:25:00,262 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 17:25:00,263 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 17:25:00,266 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 17:25:00,268 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 17:25:00,269 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 17:25:00,269 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 17:25:00,270 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 17:25:00,271 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 17:25:00,271 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 17:25:00,272 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 17:25:00,273 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 17:25:00,274 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 17:25:00,274 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 17:25:00,275 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 17:25:00,275 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 17:25:00,277 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 17:25:00,278 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 17:25:00,279 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-12 17:25:00,305 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 17:25:00,305 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 17:25:00,307 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 17:25:00,307 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 17:25:00,307 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 17:25:00,307 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 17:25:00,308 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 17:25:00,308 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 17:25:00,308 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 17:25:00,308 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 17:25:00,308 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 17:25:00,308 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 17:25:00,309 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 17:25:00,310 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 17:25:00,310 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 17:25:00,310 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 17:25:00,310 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 17:25:00,311 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 17:25:00,311 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 17:25:00,311 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 17:25:00,311 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 17:25:00,311 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 17:25:00,311 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 17:25:00,312 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 17:25:00,312 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 17:25:00,312 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 17:25:00,313 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 17:25:00,313 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 17:25:00,313 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 17:25:00,313 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 17:25:00,313 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 17:25:00,313 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 17:25:00,314 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 17:25:00,314 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 17:25:00,314 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 17:25:00,373 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 17:25:00,387 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 17:25:00,390 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 17:25:00,392 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 17:25:00,392 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 17:25:00,393 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label51_true-unreach-call.c [2018-11-12 17:25:00,454 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f15fe935/1cc5ccaefa1f42218d24799ec791879b/FLAG0100f766f [2018-11-12 17:25:01,134 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 17:25:01,134 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label51_true-unreach-call.c [2018-11-12 17:25:01,158 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f15fe935/1cc5ccaefa1f42218d24799ec791879b/FLAG0100f766f [2018-11-12 17:25:01,179 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f15fe935/1cc5ccaefa1f42218d24799ec791879b [2018-11-12 17:25:01,192 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 17:25:01,194 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 17:25:01,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 17:25:01,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 17:25:01,201 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 17:25:01,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 05:25:01" (1/1) ... [2018-11-12 17:25:01,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@614e8287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:25:01, skipping insertion in model container [2018-11-12 17:25:01,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 05:25:01" (1/1) ... [2018-11-12 17:25:01,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 17:25:01,326 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 17:25:02,084 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 17:25:02,090 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 17:25:02,402 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 17:25:02,427 INFO L193 MainTranslator]: Completed translation [2018-11-12 17:25:02,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:25:02 WrapperNode [2018-11-12 17:25:02,428 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 17:25:02,429 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 17:25:02,429 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 17:25:02,429 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 17:25:02,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:25:02" (1/1) ... [2018-11-12 17:25:02,624 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:25:02" (1/1) ... [2018-11-12 17:25:02,638 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 17:25:02,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 17:25:02,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 17:25:02,639 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 17:25:02,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:25:02" (1/1) ... [2018-11-12 17:25:02,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:25:02" (1/1) ... [2018-11-12 17:25:02,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:25:02" (1/1) ... [2018-11-12 17:25:02,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:25:02" (1/1) ... [2018-11-12 17:25:02,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:25:02" (1/1) ... [2018-11-12 17:25:02,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:25:02" (1/1) ... [2018-11-12 17:25:02,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:25:02" (1/1) ... [2018-11-12 17:25:02,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 17:25:02,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 17:25:02,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 17:25:02,802 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 17:25:02,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:25:02" (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 [2018-11-12 17:25:02,870 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 17:25:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 17:25:02,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 17:25:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 17:25:02,871 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 17:25:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 17:25:02,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 17:25:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 17:25:02,872 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 17:25:08,373 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 17:25:08,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 05:25:08 BoogieIcfgContainer [2018-11-12 17:25:08,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 17:25:08,375 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 17:25:08,375 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 17:25:08,379 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 17:25:08,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 05:25:01" (1/3) ... [2018-11-12 17:25:08,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a0eae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 05:25:08, skipping insertion in model container [2018-11-12 17:25:08,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:25:02" (2/3) ... [2018-11-12 17:25:08,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a0eae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 05:25:08, skipping insertion in model container [2018-11-12 17:25:08,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 05:25:08" (3/3) ... [2018-11-12 17:25:08,384 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label51_true-unreach-call.c [2018-11-12 17:25:08,395 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 17:25:08,405 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 17:25:08,423 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 17:25:08,472 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 17:25:08,473 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 17:25:08,473 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 17:25:08,473 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 17:25:08,473 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 17:25:08,473 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 17:25:08,473 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 17:25:08,474 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 17:25:08,517 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-11-12 17:25:08,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-11-12 17:25:08,539 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:25:08,540 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:25:08,543 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:25:08,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:25:08,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1377037548, now seen corresponding path program 1 times [2018-11-12 17:25:08,553 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:25:08,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:25:08,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:25:08,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:25:08,604 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:25:08,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:25:09,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:25:09,815 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 17:25:09,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 17:25:09,815 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:25:09,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 17:25:09,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 17:25:09,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 17:25:09,842 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-11-12 17:25:13,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:25:13,094 INFO L93 Difference]: Finished difference Result 1077 states and 1927 transitions. [2018-11-12 17:25:13,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 17:25:13,096 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 195 [2018-11-12 17:25:13,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:25:13,120 INFO L225 Difference]: With dead ends: 1077 [2018-11-12 17:25:13,120 INFO L226 Difference]: Without dead ends: 759 [2018-11-12 17:25:13,129 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 [2018-11-12 17:25:13,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2018-11-12 17:25:13,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 519. [2018-11-12 17:25:13,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2018-11-12 17:25:13,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 918 transitions. [2018-11-12 17:25:13,254 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 918 transitions. Word has length 195 [2018-11-12 17:25:13,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:25:13,256 INFO L480 AbstractCegarLoop]: Abstraction has 519 states and 918 transitions. [2018-11-12 17:25:13,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 17:25:13,256 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 918 transitions. [2018-11-12 17:25:13,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-11-12 17:25:13,276 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:25:13,278 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:25:13,278 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:25:13,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:25:13,279 INFO L82 PathProgramCache]: Analyzing trace with hash 233310665, now seen corresponding path program 1 times [2018-11-12 17:25:13,279 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:25:13,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:25:13,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:25:13,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:25:13,282 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:25:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:25:13,661 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 17:25:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:25:13,727 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 17:25:13,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 17:25:13,728 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:25:13,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 17:25:13,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 17:25:13,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 17:25:13,731 INFO L87 Difference]: Start difference. First operand 519 states and 918 transitions. Second operand 6 states. [2018-11-12 17:25:17,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:25:17,392 INFO L93 Difference]: Finished difference Result 1480 states and 2698 transitions. [2018-11-12 17:25:17,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 17:25:17,395 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 223 [2018-11-12 17:25:17,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:25:17,405 INFO L225 Difference]: With dead ends: 1480 [2018-11-12 17:25:17,405 INFO L226 Difference]: Without dead ends: 967 [2018-11-12 17:25:17,409 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-12 17:25:17,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2018-11-12 17:25:17,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 949. [2018-11-12 17:25:17,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 949 states. [2018-11-12 17:25:17,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1579 transitions. [2018-11-12 17:25:17,463 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1579 transitions. Word has length 223 [2018-11-12 17:25:17,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:25:17,464 INFO L480 AbstractCegarLoop]: Abstraction has 949 states and 1579 transitions. [2018-11-12 17:25:17,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 17:25:17,464 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1579 transitions. [2018-11-12 17:25:17,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-11-12 17:25:17,470 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:25:17,471 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:25:17,471 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:25:17,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:25:17,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1168787131, now seen corresponding path program 1 times [2018-11-12 17:25:17,472 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:25:17,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:25:17,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:25:17,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:25:17,473 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:25:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:25:17,775 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-11-12 17:25:17,934 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:25:17,935 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 17:25:17,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 17:25:17,935 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:25:17,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 17:25:17,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 17:25:17,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 17:25:17,937 INFO L87 Difference]: Start difference. First operand 949 states and 1579 transitions. Second operand 6 states. [2018-11-12 17:25:20,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:25:20,941 INFO L93 Difference]: Finished difference Result 2923 states and 5085 transitions. [2018-11-12 17:25:20,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-12 17:25:20,945 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 230 [2018-11-12 17:25:20,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:25:20,969 INFO L225 Difference]: With dead ends: 2923 [2018-11-12 17:25:20,969 INFO L226 Difference]: Without dead ends: 1980 [2018-11-12 17:25:20,977 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-12 17:25:20,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2018-11-12 17:25:21,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1937. [2018-11-12 17:25:21,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1937 states. [2018-11-12 17:25:21,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 3132 transitions. [2018-11-12 17:25:21,090 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 3132 transitions. Word has length 230 [2018-11-12 17:25:21,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:25:21,090 INFO L480 AbstractCegarLoop]: Abstraction has 1937 states and 3132 transitions. [2018-11-12 17:25:21,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 17:25:21,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 3132 transitions. [2018-11-12 17:25:21,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-11-12 17:25:21,105 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:25:21,106 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:25:21,106 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:25:21,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:25:21,107 INFO L82 PathProgramCache]: Analyzing trace with hash 735234804, now seen corresponding path program 1 times [2018-11-12 17:25:21,107 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:25:21,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:25:21,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:25:21,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:25:21,108 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:25:21,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:25:21,537 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:25:21,538 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 17:25:21,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 17:25:21,538 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:25:21,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 17:25:21,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 17:25:21,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 17:25:21,540 INFO L87 Difference]: Start difference. First operand 1937 states and 3132 transitions. Second operand 3 states. [2018-11-12 17:25:24,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:25:24,148 INFO L93 Difference]: Finished difference Result 5678 states and 9481 transitions. [2018-11-12 17:25:24,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 17:25:24,148 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2018-11-12 17:25:24,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:25:24,174 INFO L225 Difference]: With dead ends: 5678 [2018-11-12 17:25:24,174 INFO L226 Difference]: Without dead ends: 3747 [2018-11-12 17:25:24,186 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 17:25:24,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3747 states. [2018-11-12 17:25:24,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3747 to 3742. [2018-11-12 17:25:24,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3742 states. [2018-11-12 17:25:24,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3742 states to 3742 states and 5849 transitions. [2018-11-12 17:25:24,296 INFO L78 Accepts]: Start accepts. Automaton has 3742 states and 5849 transitions. Word has length 241 [2018-11-12 17:25:24,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:25:24,297 INFO L480 AbstractCegarLoop]: Abstraction has 3742 states and 5849 transitions. [2018-11-12 17:25:24,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 17:25:24,297 INFO L276 IsEmpty]: Start isEmpty. Operand 3742 states and 5849 transitions. [2018-11-12 17:25:24,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-11-12 17:25:24,315 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:25:24,315 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:25:24,316 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:25:24,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:25:24,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1160092379, now seen corresponding path program 1 times [2018-11-12 17:25:24,316 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:25:24,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:25:24,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:25:24,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:25:24,318 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:25:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:25:24,543 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 17:25:24,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:25:24,543 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:25:24,544 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 249 with the following transitions: [2018-11-12 17:25:24,546 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [68], [73], [75], [76], [80], [84], [88], [92], [95], [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], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1021], [1023], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:25:24,613 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:25:24,614 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:25:26,322 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 17:25:26,324 INFO L272 AbstractInterpreter]: Visited 196 different actions 196 times. Never merged. Never widened. Performed 3388 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3388 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 88 variables. [2018-11-12 17:25:26,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:25:26,360 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 17:25:28,112 INFO L227 lantSequenceWeakener]: Weakened 237 states. On average, predicates are now at 73.53% of their original sizes. [2018-11-12 17:25:28,113 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 17:25:29,235 INFO L415 sIntCurrentIteration]: We unified 247 AI predicates to 247 [2018-11-12 17:25:29,235 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 17:25:29,236 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 17:25:29,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [6] total 20 [2018-11-12 17:25:29,237 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:25:29,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-12 17:25:29,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-12 17:25:29,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2018-11-12 17:25:29,238 INFO L87 Difference]: Start difference. First operand 3742 states and 5849 transitions. Second operand 16 states. [2018-11-12 17:26:09,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:26:09,748 INFO L93 Difference]: Finished difference Result 7688 states and 11993 transitions. [2018-11-12 17:26:09,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-12 17:26:09,748 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 248 [2018-11-12 17:26:09,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:26:09,767 INFO L225 Difference]: With dead ends: 7688 [2018-11-12 17:26:09,768 INFO L226 Difference]: Without dead ends: 3952 [2018-11-12 17:26:09,781 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 250 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2018-11-12 17:26:09,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2018-11-12 17:26:09,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3950. [2018-11-12 17:26:09,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3950 states. [2018-11-12 17:26:09,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3950 states to 3950 states and 6066 transitions. [2018-11-12 17:26:09,887 INFO L78 Accepts]: Start accepts. Automaton has 3950 states and 6066 transitions. Word has length 248 [2018-11-12 17:26:09,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:26:09,887 INFO L480 AbstractCegarLoop]: Abstraction has 3950 states and 6066 transitions. [2018-11-12 17:26:09,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-12 17:26:09,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3950 states and 6066 transitions. [2018-11-12 17:26:09,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-11-12 17:26:09,904 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:26:09,904 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:26:09,904 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:26:09,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:26:09,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1018040286, now seen corresponding path program 1 times [2018-11-12 17:26:09,905 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:26:09,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:26:09,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:26:09,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:26:09,907 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:26:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:26:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 60 proven. 27 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-12 17:26:10,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:26:10,151 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:26:10,151 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 261 with the following transitions: [2018-11-12 17:26:10,152 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [68], [73], [75], [76], [80], [84], [88], [92], [95], [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], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1021], [1023], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:26:10,164 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:26:10,164 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:26:13,565 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 17:26:13,566 INFO L272 AbstractInterpreter]: Visited 200 different actions 396 times. Merged at 5 different actions 7 times. Never widened. Performed 12339 root evaluator evaluations with a maximum evaluation depth of 6. Performed 12339 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-12 17:26:13,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:26:13,576 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 17:26:15,506 INFO L227 lantSequenceWeakener]: Weakened 88 states. On average, predicates are now at 80.84% of their original sizes. [2018-11-12 17:26:15,506 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 17:26:21,421 INFO L415 sIntCurrentIteration]: We unified 259 AI predicates to 259 [2018-11-12 17:26:21,421 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 17:26:21,422 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 17:26:21,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [6] total 27 [2018-11-12 17:26:21,422 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:26:21,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-12 17:26:21,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-12 17:26:21,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2018-11-12 17:26:21,424 INFO L87 Difference]: Start difference. First operand 3950 states and 6066 transitions. Second operand 23 states. [2018-11-12 17:27:26,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:27:26,277 INFO L93 Difference]: Finished difference Result 8317 states and 12738 transitions. [2018-11-12 17:27:26,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-12 17:27:26,277 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 260 [2018-11-12 17:27:26,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:27:26,297 INFO L225 Difference]: With dead ends: 8317 [2018-11-12 17:27:26,297 INFO L226 Difference]: Without dead ends: 4581 [2018-11-12 17:27:26,309 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 270 GetRequests, 189 SyntacticMatches, 49 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2018-11-12 17:27:26,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4581 states. [2018-11-12 17:27:26,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4581 to 4578. [2018-11-12 17:27:26,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4578 states. [2018-11-12 17:27:26,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 6745 transitions. [2018-11-12 17:27:26,434 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 6745 transitions. Word has length 260 [2018-11-12 17:27:26,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:27:26,434 INFO L480 AbstractCegarLoop]: Abstraction has 4578 states and 6745 transitions. [2018-11-12 17:27:26,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-12 17:27:26,435 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 6745 transitions. [2018-11-12 17:27:26,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-11-12 17:27:26,453 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:27:26,454 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:27:26,454 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:27:26,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:27:26,454 INFO L82 PathProgramCache]: Analyzing trace with hash -287623958, now seen corresponding path program 1 times [2018-11-12 17:27:26,455 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:27:26,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:27:26,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:27:26,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:27:26,456 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:27:26,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:27:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 89 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-12 17:27:26,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:27:26,787 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:27:26,787 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 271 with the following transitions: [2018-11-12 17:27:26,787 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [73], [75], [76], [80], [84], [88], [92], [95], [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], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1021], [1023], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:27:26,794 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:27:26,795 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:27:28,627 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 17:27:28,627 INFO L272 AbstractInterpreter]: Visited 201 different actions 394 times. Merged at 4 different actions 4 times. Never widened. Performed 8791 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8791 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-12 17:27:28,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:27:28,632 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 17:27:28,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:27:28,632 INFO L192 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 [2018-11-12 17:27:28,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:27:28,649 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 17:27:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:27:28,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 17:27:29,133 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-12 17:27:29,134 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 17:27:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-12 17:27:29,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 17:27:29,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-11-12 17:27:29,496 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 17:27:29,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 17:27:29,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 17:27:29,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-11-12 17:27:29,499 INFO L87 Difference]: Start difference. First operand 4578 states and 6745 transitions. Second operand 9 states. [2018-11-12 17:27:33,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:27:33,536 INFO L93 Difference]: Finished difference Result 12916 states and 22204 transitions. [2018-11-12 17:27:33,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-12 17:27:33,546 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 270 [2018-11-12 17:27:33,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:27:33,624 INFO L225 Difference]: With dead ends: 12916 [2018-11-12 17:27:33,624 INFO L226 Difference]: Without dead ends: 8761 [2018-11-12 17:27:33,655 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 541 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2018-11-12 17:27:33,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8761 states. [2018-11-12 17:27:33,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8761 to 8035. [2018-11-12 17:27:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8035 states. [2018-11-12 17:27:33,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8035 states to 8035 states and 11567 transitions. [2018-11-12 17:27:33,970 INFO L78 Accepts]: Start accepts. Automaton has 8035 states and 11567 transitions. Word has length 270 [2018-11-12 17:27:33,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:27:33,970 INFO L480 AbstractCegarLoop]: Abstraction has 8035 states and 11567 transitions. [2018-11-12 17:27:33,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 17:27:33,971 INFO L276 IsEmpty]: Start isEmpty. Operand 8035 states and 11567 transitions. [2018-11-12 17:27:33,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2018-11-12 17:27:33,996 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:27:33,997 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:27:33,997 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:27:33,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:27:33,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1836466746, now seen corresponding path program 1 times [2018-11-12 17:27:33,998 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:27:33,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:27:33,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:27:33,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:27:33,999 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:27:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:27:34,628 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-12 17:27:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 132 proven. 34 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-12 17:27:34,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:27:34,866 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:27:34,866 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 312 with the following transitions: [2018-11-12 17:27:34,866 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], [123], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [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], [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], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1021], [1023], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:27:34,872 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:27:34,872 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:27:37,798 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 17:27:37,798 INFO L272 AbstractInterpreter]: Visited 201 different actions 594 times. Merged at 7 different actions 14 times. Never widened. Performed 13637 root evaluator evaluations with a maximum evaluation depth of 6. Performed 13637 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-12 17:27:37,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:27:37,805 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 17:27:37,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:27:37,805 INFO L192 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 [2018-11-12 17:27:37,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:27:37,815 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 17:27:38,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:27:38,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 17:27:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 132 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-12 17:27:38,231 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 17:27:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 160 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-12 17:27:38,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 17:27:38,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2018-11-12 17:27:38,599 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 17:27:38,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-12 17:27:38,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-12 17:27:38,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-12 17:27:38,601 INFO L87 Difference]: Start difference. First operand 8035 states and 11567 transitions. Second operand 8 states. [2018-11-12 17:27:44,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:27:44,833 INFO L93 Difference]: Finished difference Result 24923 states and 39175 transitions. [2018-11-12 17:27:44,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-12 17:27:44,834 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 311 [2018-11-12 17:27:44,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:27:44,927 INFO L225 Difference]: With dead ends: 24923 [2018-11-12 17:27:44,927 INFO L226 Difference]: Without dead ends: 17942 [2018-11-12 17:27:44,982 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 642 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=288, Invalid=972, Unknown=0, NotChecked=0, Total=1260 [2018-11-12 17:27:45,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17942 states. [2018-11-12 17:27:45,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17942 to 16558. [2018-11-12 17:27:45,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16558 states. [2018-11-12 17:27:45,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16558 states to 16558 states and 22749 transitions. [2018-11-12 17:27:45,563 INFO L78 Accepts]: Start accepts. Automaton has 16558 states and 22749 transitions. Word has length 311 [2018-11-12 17:27:45,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:27:45,563 INFO L480 AbstractCegarLoop]: Abstraction has 16558 states and 22749 transitions. [2018-11-12 17:27:45,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-12 17:27:45,563 INFO L276 IsEmpty]: Start isEmpty. Operand 16558 states and 22749 transitions. [2018-11-12 17:27:45,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-11-12 17:27:45,616 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:27:45,616 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 17:27:45,616 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:27:45,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:27:45,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1547804470, now seen corresponding path program 1 times [2018-11-12 17:27:45,617 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:27:45,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:27:45,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:27:45,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:27:45,619 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:27:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:27:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 149 proven. 34 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-12 17:27:46,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:27:46,440 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:27:46,440 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 331 with the following transitions: [2018-11-12 17:27:46,441 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], [123], [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], [315], [320], [322], [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], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1021], [1023], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:27:46,447 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:27:46,448 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:27:50,894 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 17:27:50,895 INFO L272 AbstractInterpreter]: Visited 203 different actions 808 times. Merged at 8 different actions 32 times. Never widened. Performed 18679 root evaluator evaluations with a maximum evaluation depth of 6. Performed 18679 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 7 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-12 17:27:50,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:27:50,900 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 17:27:50,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:27:50,900 INFO L192 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 [2018-11-12 17:27:50,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:27:50,909 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 17:27:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:27:51,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 17:27:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 168 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-12 17:27:51,315 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 17:27:51,664 WARN L179 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2018-11-12 17:27:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 149 proven. 34 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-12 17:27:52,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 17:27:52,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2018-11-12 17:27:52,238 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 17:27:52,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 17:27:52,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 17:27:52,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2018-11-12 17:27:52,240 INFO L87 Difference]: Start difference. First operand 16558 states and 22749 transitions. Second operand 10 states. [2018-11-12 17:28:01,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:28:01,121 INFO L93 Difference]: Finished difference Result 42046 states and 65955 transitions. [2018-11-12 17:28:01,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-11-12 17:28:01,122 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 330 [2018-11-12 17:28:01,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:28:01,278 INFO L225 Difference]: With dead ends: 42046 [2018-11-12 17:28:01,279 INFO L226 Difference]: Without dead ends: 27761 [2018-11-12 17:28:01,343 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 754 GetRequests, 697 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=646, Invalid=2660, Unknown=0, NotChecked=0, Total=3306 [2018-11-12 17:28:01,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27761 states. [2018-11-12 17:28:02,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27761 to 26123. [2018-11-12 17:28:02,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26123 states. [2018-11-12 17:28:02,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26123 states to 26123 states and 34615 transitions. [2018-11-12 17:28:02,635 INFO L78 Accepts]: Start accepts. Automaton has 26123 states and 34615 transitions. Word has length 330 [2018-11-12 17:28:02,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:28:02,636 INFO L480 AbstractCegarLoop]: Abstraction has 26123 states and 34615 transitions. [2018-11-12 17:28:02,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 17:28:02,636 INFO L276 IsEmpty]: Start isEmpty. Operand 26123 states and 34615 transitions. [2018-11-12 17:28:02,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-11-12 17:28:02,694 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:28:02,694 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 17:28:02,695 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:28:02,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:28:02,695 INFO L82 PathProgramCache]: Analyzing trace with hash 860820868, now seen corresponding path program 1 times [2018-11-12 17:28:02,695 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:28:02,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:28:02,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:28:02,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:28:02,697 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:28:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:28:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 148 proven. 8 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-12 17:28:03,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:28:03,278 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:28:03,279 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 343 with the following transitions: [2018-11-12 17:28:03,279 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [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], [123], [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], [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], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1021], [1023], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:28:03,287 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:28:03,288 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:28:05,295 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 17:28:05,296 INFO L272 AbstractInterpreter]: Visited 200 different actions 394 times. Merged at 5 different actions 5 times. Never widened. Performed 10655 root evaluator evaluations with a maximum evaluation depth of 6. Performed 10655 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-12 17:28:05,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:28:05,304 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 17:28:06,849 INFO L227 lantSequenceWeakener]: Weakened 337 states. On average, predicates are now at 72.46% of their original sizes. [2018-11-12 17:28:06,849 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 17:28:07,299 INFO L415 sIntCurrentIteration]: We unified 341 AI predicates to 341 [2018-11-12 17:28:07,299 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 17:28:07,300 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 17:28:07,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [25] imperfect sequences [5] total 28 [2018-11-12 17:28:07,300 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:28:07,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-12 17:28:07,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-12 17:28:07,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2018-11-12 17:28:07,302 INFO L87 Difference]: Start difference. First operand 26123 states and 34615 transitions. Second operand 25 states. Received shutdown request... [2018-11-12 17:28:51,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-12 17:28:51,412 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 17:28:51,417 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 17:28:51,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 05:28:51 BoogieIcfgContainer [2018-11-12 17:28:51,418 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 17:28:51,419 INFO L168 Benchmark]: Toolchain (without parser) took 230226.60 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 2.9 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-11-12 17:28:51,420 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 17:28:51,420 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1233.73 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-11-12 17:28:51,421 INFO L168 Benchmark]: Boogie Procedure Inliner took 209.50 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 761.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -899.0 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. [2018-11-12 17:28:51,422 INFO L168 Benchmark]: Boogie Preprocessor took 162.57 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 17:28:51,423 INFO L168 Benchmark]: RCFGBuilder took 5572.19 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 258.4 MB). Peak memory consumption was 258.4 MB. Max. memory is 7.1 GB. [2018-11-12 17:28:51,423 INFO L168 Benchmark]: TraceAbstraction took 223043.08 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 2.9 GB in the end (delta: -895.7 MB). Peak memory consumption was 854.9 MB. Max. memory is 7.1 GB. [2018-11-12 17:28:51,428 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1233.73 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 209.50 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 761.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -899.0 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 162.57 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 5572.19 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 258.4 MB). Peak memory consumption was 258.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 223043.08 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 2.9 GB in the end (delta: -895.7 MB). Peak memory consumption was 854.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1599]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1599). Cancelled while BasicCegarLoop was constructing difference of abstraction (26123states) and FLOYD_HOARE automaton (currently 14 states, 25 states before enhancement),while ReachableStatesComputation was computing reachable states (6497 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 222.9s OverallTime, 10 OverallIterations, 4 TraceHistogramMax, 181.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2147 SDtfs, 14216 SDslu, 3414 SDs, 0 SdLazy, 26396 SolverSat, 4826 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 114.4s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 2890 GetRequests, 2631 SyntacticMatches, 57 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2201 ImplicationChecksByTransitivity, 12.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26123occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 16.5s AbstIntTime, 6 AbstIntIterations, 3 AbstIntStrong, 0.9991468484906671 AbsIntWeakeningRatio, 0.2550177095631641 AbsIntAvgWeakeningVarsNumRemoved, 52.39433293978748 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.8s AutomataMinimizationTime, 9 MinimizatonAttempts, 4059 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 6.3s InterpolantComputationTime, 3561 NumberOfCodeBlocks, 3561 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 4456 ConstructedInterpolants, 0 QuantifiedInterpolants, 2860753 SizeOfPredicates, 14 NumberOfNonLiveVariables, 3829 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 1803/2018 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown