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.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label16_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 15:41:19,294 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 15:41:19,296 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 15:41:19,310 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 15:41:19,311 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 15:41:19,312 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 15:41:19,313 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 15:41:19,315 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 15:41:19,316 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 15:41:19,317 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 15:41:19,318 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 15:41:19,318 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 15:41:19,319 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 15:41:19,320 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 15:41:19,322 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 15:41:19,322 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 15:41:19,323 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 15:41:19,325 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 15:41:19,327 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 15:41:19,329 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 15:41:19,330 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 15:41:19,331 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 15:41:19,334 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 15:41:19,334 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 15:41:19,334 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 15:41:19,335 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 15:41:19,336 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 15:41:19,337 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 15:41:19,338 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 15:41:19,339 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 15:41:19,339 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 15:41:19,340 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 15:41:19,340 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 15:41:19,341 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 15:41:19,342 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 15:41:19,342 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 15:41:19,343 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.epf [2018-11-07 15:41:19,358 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 15:41:19,358 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 15:41:19,359 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 15:41:19,359 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 15:41:19,360 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 15:41:19,360 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 15:41:19,360 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 15:41:19,360 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 15:41:19,360 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 15:41:19,360 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 15:41:19,361 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 15:41:19,361 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 15:41:19,362 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 15:41:19,362 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 15:41:19,362 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 15:41:19,362 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 15:41:19,362 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 15:41:19,362 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 15:41:19,363 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 15:41:19,363 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 15:41:19,363 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 15:41:19,363 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 15:41:19,363 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 15:41:19,364 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 15:41:19,364 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 15:41:19,364 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 15:41:19,364 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 15:41:19,364 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 15:41:19,365 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 15:41:19,365 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 15:41:19,365 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 15:41:19,365 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 15:41:19,365 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 15:41:19,365 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 15:41:19,415 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 15:41:19,429 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 15:41:19,432 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 15:41:19,434 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 15:41:19,434 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 15:41:19,435 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label16_true-unreach-call.c [2018-11-07 15:41:19,510 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f4413783/4eec7f1a8d4e48048ac1fcc03c1f9d83/FLAG49f8b3902 [2018-11-07 15:41:20,200 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 15:41:20,201 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label16_true-unreach-call.c [2018-11-07 15:41:20,225 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f4413783/4eec7f1a8d4e48048ac1fcc03c1f9d83/FLAG49f8b3902 [2018-11-07 15:41:20,240 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f4413783/4eec7f1a8d4e48048ac1fcc03c1f9d83 [2018-11-07 15:41:20,251 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 15:41:20,253 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 15:41:20,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 15:41:20,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 15:41:20,258 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 15:41:20,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:41:20" (1/1) ... [2018-11-07 15:41:20,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53c7ef73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:20, skipping insertion in model container [2018-11-07 15:41:20,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:41:20" (1/1) ... [2018-11-07 15:41:20,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 15:41:20,395 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 15:41:21,465 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:41:21,469 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 15:41:21,938 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:41:21,966 INFO L193 MainTranslator]: Completed translation [2018-11-07 15:41:21,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:21 WrapperNode [2018-11-07 15:41:21,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 15:41:21,968 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 15:41:21,968 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 15:41:21,969 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 15:41:21,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:21" (1/1) ... [2018-11-07 15:41:22,207 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:21" (1/1) ... [2018-11-07 15:41:22,217 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 15:41:22,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 15:41:22,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 15:41:22,218 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 15:41:22,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:21" (1/1) ... [2018-11-07 15:41:22,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:21" (1/1) ... [2018-11-07 15:41:22,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:21" (1/1) ... [2018-11-07 15:41:22,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:21" (1/1) ... [2018-11-07 15:41:22,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:21" (1/1) ... [2018-11-07 15:41:22,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:21" (1/1) ... [2018-11-07 15:41:22,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:21" (1/1) ... [2018-11-07 15:41:22,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 15:41:22,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 15:41:22,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 15:41:22,478 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 15:41:22,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 15:41:22,551 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 15:41:22,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 15:41:22,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 15:41:22,551 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-11-07 15:41:22,552 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-11-07 15:41:22,552 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 15:41:22,552 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 15:41:22,552 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 15:41:22,552 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 15:41:22,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 15:41:22,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 15:41:22,553 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 15:41:22,553 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 15:41:30,195 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 15:41:30,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:41:30 BoogieIcfgContainer [2018-11-07 15:41:30,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 15:41:30,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 15:41:30,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 15:41:30,200 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 15:41:30,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:41:20" (1/3) ... [2018-11-07 15:41:30,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2640177c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:41:30, skipping insertion in model container [2018-11-07 15:41:30,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:21" (2/3) ... [2018-11-07 15:41:30,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2640177c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:41:30, skipping insertion in model container [2018-11-07 15:41:30,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:41:30" (3/3) ... [2018-11-07 15:41:30,204 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label16_true-unreach-call.c [2018-11-07 15:41:30,214 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 15:41:30,223 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 15:41:30,241 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 15:41:30,286 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 15:41:30,286 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 15:41:30,286 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 15:41:30,286 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 15:41:30,287 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 15:41:30,287 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 15:41:30,287 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 15:41:30,287 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 15:41:30,326 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states. [2018-11-07 15:41:30,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-07 15:41:30,335 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:41:30,336 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] [2018-11-07 15:41:30,338 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:41:30,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:41:30,345 INFO L82 PathProgramCache]: Analyzing trace with hash -83199201, now seen corresponding path program 1 times [2018-11-07 15:41:30,347 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:41:30,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:41:30,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:41:30,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:41:30,406 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:41:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:41:30,874 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:41:30,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:41:30,907 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:41:30,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 15:41:30,907 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:41:30,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 15:41:30,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 15:41:30,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 15:41:30,932 INFO L87 Difference]: Start difference. First operand 775 states. Second operand 3 states. [2018-11-07 15:41:37,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:41:37,987 INFO L93 Difference]: Finished difference Result 2251 states and 4322 transitions. [2018-11-07 15:41:37,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 15:41:37,988 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2018-11-07 15:41:37,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:41:38,023 INFO L225 Difference]: With dead ends: 2251 [2018-11-07 15:41:38,023 INFO L226 Difference]: Without dead ends: 1474 [2018-11-07 15:41:38,033 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 15:41:38,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2018-11-07 15:41:38,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1474. [2018-11-07 15:41:38,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1474 states. [2018-11-07 15:41:38,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2801 transitions. [2018-11-07 15:41:38,213 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2801 transitions. Word has length 53 [2018-11-07 15:41:38,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:41:38,214 INFO L480 AbstractCegarLoop]: Abstraction has 1474 states and 2801 transitions. [2018-11-07 15:41:38,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 15:41:38,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2801 transitions. [2018-11-07 15:41:38,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-07 15:41:38,229 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:41:38,229 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:41:38,230 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:41:38,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:41:38,230 INFO L82 PathProgramCache]: Analyzing trace with hash -159843752, now seen corresponding path program 1 times [2018-11-07 15:41:38,230 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:41:38,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:41:38,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:41:38,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:41:38,233 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:41:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:41:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:41:38,504 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:41:38,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:41:38,504 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:41:38,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:41:38,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:41:38,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:41:38,507 INFO L87 Difference]: Start difference. First operand 1474 states and 2801 transitions. Second operand 6 states. [2018-11-07 15:41:50,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:41:50,323 INFO L93 Difference]: Finished difference Result 5789 states and 11192 transitions. [2018-11-07 15:41:50,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:41:50,333 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2018-11-07 15:41:50,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:41:50,365 INFO L225 Difference]: With dead ends: 5789 [2018-11-07 15:41:50,365 INFO L226 Difference]: Without dead ends: 4321 [2018-11-07 15:41:50,376 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:41:50,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4321 states. [2018-11-07 15:41:50,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4321 to 4295. [2018-11-07 15:41:50,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4295 states. [2018-11-07 15:41:50,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4295 states to 4295 states and 7032 transitions. [2018-11-07 15:41:50,538 INFO L78 Accepts]: Start accepts. Automaton has 4295 states and 7032 transitions. Word has length 127 [2018-11-07 15:41:50,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:41:50,539 INFO L480 AbstractCegarLoop]: Abstraction has 4295 states and 7032 transitions. [2018-11-07 15:41:50,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:41:50,539 INFO L276 IsEmpty]: Start isEmpty. Operand 4295 states and 7032 transitions. [2018-11-07 15:41:50,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-11-07 15:41:50,545 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:41:50,550 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:41:50,550 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:41:50,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:41:50,555 INFO L82 PathProgramCache]: Analyzing trace with hash -204584991, now seen corresponding path program 1 times [2018-11-07 15:41:50,555 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:41:50,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:41:50,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:41:50,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:41:50,558 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:41:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:41:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:41:50,797 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:41:50,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 15:41:50,798 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:41:50,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 15:41:50,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 15:41:50,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 15:41:50,799 INFO L87 Difference]: Start difference. First operand 4295 states and 7032 transitions. Second operand 5 states. [2018-11-07 15:42:02,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:42:02,383 INFO L93 Difference]: Finished difference Result 14334 states and 23466 transitions. [2018-11-07 15:42:02,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 15:42:02,386 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2018-11-07 15:42:02,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:42:02,439 INFO L225 Difference]: With dead ends: 14334 [2018-11-07 15:42:02,440 INFO L226 Difference]: Without dead ends: 10045 [2018-11-07 15:42:02,459 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 15:42:02,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10045 states. [2018-11-07 15:42:02,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10045 to 9941. [2018-11-07 15:42:02,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9941 states. [2018-11-07 15:42:02,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9941 states to 9941 states and 14577 transitions. [2018-11-07 15:42:02,714 INFO L78 Accepts]: Start accepts. Automaton has 9941 states and 14577 transitions. Word has length 130 [2018-11-07 15:42:02,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:42:02,715 INFO L480 AbstractCegarLoop]: Abstraction has 9941 states and 14577 transitions. [2018-11-07 15:42:02,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 15:42:02,715 INFO L276 IsEmpty]: Start isEmpty. Operand 9941 states and 14577 transitions. [2018-11-07 15:42:02,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-11-07 15:42:02,720 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:42:02,720 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 15:42:02,721 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:42:02,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:42:02,722 INFO L82 PathProgramCache]: Analyzing trace with hash -167780547, now seen corresponding path program 1 times [2018-11-07 15:42:02,722 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:42:02,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:42:02,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:42:02,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:42:02,724 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:42:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:42:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:42:02,985 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:42:02,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 15:42:02,985 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:42:02,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 15:42:02,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 15:42:02,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:42:02,986 INFO L87 Difference]: Start difference. First operand 9941 states and 14577 transitions. Second operand 4 states. [2018-11-07 15:42:10,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:42:10,826 INFO L93 Difference]: Finished difference Result 26970 states and 40877 transitions. [2018-11-07 15:42:10,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 15:42:10,826 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2018-11-07 15:42:10,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:42:10,907 INFO L225 Difference]: With dead ends: 26970 [2018-11-07 15:42:10,907 INFO L226 Difference]: Without dead ends: 17035 [2018-11-07 15:42:10,941 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:42:10,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17035 states. [2018-11-07 15:42:11,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17035 to 17035. [2018-11-07 15:42:11,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17035 states. [2018-11-07 15:42:11,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17035 states to 17035 states and 24166 transitions. [2018-11-07 15:42:11,300 INFO L78 Accepts]: Start accepts. Automaton has 17035 states and 24166 transitions. Word has length 160 [2018-11-07 15:42:11,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:42:11,301 INFO L480 AbstractCegarLoop]: Abstraction has 17035 states and 24166 transitions. [2018-11-07 15:42:11,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 15:42:11,301 INFO L276 IsEmpty]: Start isEmpty. Operand 17035 states and 24166 transitions. [2018-11-07 15:42:11,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-11-07 15:42:11,310 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:42:11,312 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 15:42:11,313 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:42:11,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:42:11,313 INFO L82 PathProgramCache]: Analyzing trace with hash 153625489, now seen corresponding path program 1 times [2018-11-07 15:42:11,313 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:42:11,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:42:11,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:42:11,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:42:11,315 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:42:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:42:11,630 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:42:12,145 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 93 proven. 14 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-07 15:42:12,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:42:12,146 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 15:42:12,147 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 234 with the following transitions: [2018-11-07 15:42:12,149 INFO L202 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1703], [1711], [1719], [1727], [1735], [1743], [1751], [1759], [1767], [1775], [1783], [1791], [1799], [1807], [1815], [1823], [1831], [1839], [1847], [1855], [1863], [1871], [1879], [1887], [1895], [1903], [1911], [1919], [1927], [1935], [1943], [1947], [1949], [1952], [1960], [1968], [1976], [1984], [1992], [2000], [2008], [2016], [2024], [2032], [2040], [2048], [2056], [2064], [2072], [2080], [2088], [2096], [2104], [2112], [2117], [2121], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2164], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2201], [2205], [2209], [2213], [2217], [2221], [2225], [2228], [2996], [3000], [3004], [3010], [3014], [3016], [3025], [3026], [3027], [3029], [3030] [2018-11-07 15:42:12,209 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 15:42:12,209 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 15:42:12,775 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 15:42:12,776 INFO L272 AbstractInterpreter]: Visited 103 different actions 103 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 15:42:12,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:42:12,829 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 15:42:13,375 INFO L227 lantSequenceWeakener]: Weakened 224 states. On average, predicates are now at 77.97% of their original sizes. [2018-11-07 15:42:13,375 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 15:42:13,744 INFO L415 sIntCurrentIteration]: We unified 232 AI predicates to 232 [2018-11-07 15:42:13,744 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 15:42:13,748 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 15:42:13,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-07 15:42:13,749 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:42:13,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 15:42:13,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 15:42:13,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 15:42:13,751 INFO L87 Difference]: Start difference. First operand 17035 states and 24166 transitions. Second operand 7 states. [2018-11-07 15:42:21,133 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown