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_label51_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 15:46:41,305 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 15:46:41,308 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 15:46:41,326 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 15:46:41,326 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 15:46:41,328 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 15:46:41,329 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 15:46:41,334 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 15:46:41,336 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 15:46:41,339 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 15:46:41,342 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 15:46:41,342 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 15:46:41,343 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 15:46:41,344 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 15:46:41,348 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 15:46:41,350 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 15:46:41,350 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 15:46:41,361 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 15:46:41,364 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 15:46:41,366 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 15:46:41,367 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 15:46:41,370 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 15:46:41,376 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 15:46:41,376 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 15:46:41,376 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 15:46:41,377 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 15:46:41,379 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 15:46:41,379 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 15:46:41,380 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 15:46:41,384 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 15:46:41,384 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 15:46:41,386 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 15:46:41,387 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 15:46:41,387 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 15:46:41,388 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 15:46:41,389 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 15:46:41,389 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 15:46:41,420 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 15:46:41,420 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 15:46:41,421 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 15:46:41,421 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 15:46:41,422 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 15:46:41,422 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 15:46:41,422 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 15:46:41,422 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 15:46:41,422 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 15:46:41,423 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 15:46:41,423 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 15:46:41,423 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 15:46:41,424 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 15:46:41,425 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 15:46:41,425 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 15:46:41,425 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 15:46:41,425 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 15:46:41,425 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 15:46:41,426 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 15:46:41,426 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 15:46:41,426 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 15:46:41,426 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 15:46:41,427 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 15:46:41,428 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 15:46:41,429 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 15:46:41,429 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 15:46:41,429 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 15:46:41,429 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 15:46:41,429 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 15:46:41,430 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 15:46:41,430 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 15:46:41,430 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 15:46:41,430 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 15:46:41,430 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 15:46:41,502 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 15:46:41,517 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 15:46:41,522 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 15:46:41,524 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 15:46:41,524 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 15:46:41,525 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label51_true-unreach-call.c [2018-11-07 15:46:41,591 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66534a91a/a80ab524c1da432ba434d9572389c3fe/FLAG14ffc2e30 [2018-11-07 15:46:42,299 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 15:46:42,300 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label51_true-unreach-call.c [2018-11-07 15:46:42,324 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66534a91a/a80ab524c1da432ba434d9572389c3fe/FLAG14ffc2e30 [2018-11-07 15:46:42,341 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66534a91a/a80ab524c1da432ba434d9572389c3fe [2018-11-07 15:46:42,352 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 15:46:42,354 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 15:46:42,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 15:46:42,356 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 15:46:42,361 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 15:46:42,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:46:42" (1/1) ... [2018-11-07 15:46:42,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7055bff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:42, skipping insertion in model container [2018-11-07 15:46:42,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:46:42" (1/1) ... [2018-11-07 15:46:42,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 15:46:42,512 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 15:46:43,550 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:46:43,554 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 15:46:43,984 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:46:44,013 INFO L193 MainTranslator]: Completed translation [2018-11-07 15:46:44,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:44 WrapperNode [2018-11-07 15:46:44,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 15:46:44,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 15:46:44,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 15:46:44,015 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 15:46:44,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:44" (1/1) ... [2018-11-07 15:46:44,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:44" (1/1) ... [2018-11-07 15:46:44,278 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 15:46:44,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 15:46:44,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 15:46:44,279 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 15:46:44,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:44" (1/1) ... [2018-11-07 15:46:44,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:44" (1/1) ... [2018-11-07 15:46:44,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:44" (1/1) ... [2018-11-07 15:46:44,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:44" (1/1) ... [2018-11-07 15:46:44,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:44" (1/1) ... [2018-11-07 15:46:44,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:44" (1/1) ... [2018-11-07 15:46:44,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:44" (1/1) ... [2018-11-07 15:46:44,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 15:46:44,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 15:46:44,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 15:46:44,498 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 15:46:44,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:44" (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 15:46:44,568 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 15:46:44,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 15:46:44,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 15:46:44,568 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-11-07 15:46:44,569 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-11-07 15:46:44,569 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 15:46:44,569 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 15:46:44,569 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 15:46:44,569 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 15:46:44,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 15:46:44,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 15:46:44,570 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 15:46:44,571 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 15:46:52,914 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 15:46:52,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:46:52 BoogieIcfgContainer [2018-11-07 15:46:52,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 15:46:52,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 15:46:52,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 15:46:52,919 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 15:46:52,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:46:42" (1/3) ... [2018-11-07 15:46:52,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb106b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:46:52, skipping insertion in model container [2018-11-07 15:46:52,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:44" (2/3) ... [2018-11-07 15:46:52,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb106b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:46:52, skipping insertion in model container [2018-11-07 15:46:52,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:46:52" (3/3) ... [2018-11-07 15:46:52,923 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label51_true-unreach-call.c [2018-11-07 15:46:52,936 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 15:46:52,948 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 15:46:52,968 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 15:46:53,034 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 15:46:53,034 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 15:46:53,034 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 15:46:53,035 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 15:46:53,035 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 15:46:53,035 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 15:46:53,035 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 15:46:53,035 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 15:46:53,077 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states. [2018-11-07 15:46:53,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-07 15:46:53,087 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:46:53,089 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] [2018-11-07 15:46:53,091 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:46:53,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:46:53,098 INFO L82 PathProgramCache]: Analyzing trace with hash -198133833, now seen corresponding path program 1 times [2018-11-07 15:46:53,101 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:46:53,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:46:53,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:46:53,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:46:53,164 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:46:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:46:53,664 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-11-07 15:46:53,686 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 15:46:53,689 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:46:53,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 15:46:53,689 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:46:53,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 15:46:53,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 15:46:53,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:46:53,715 INFO L87 Difference]: Start difference. First operand 775 states. Second operand 4 states. [2018-11-07 15:47:04,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:47:04,928 INFO L93 Difference]: Finished difference Result 2974 states and 5747 transitions. [2018-11-07 15:47:04,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 15:47:04,930 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2018-11-07 15:47:04,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:47:04,979 INFO L225 Difference]: With dead ends: 2974 [2018-11-07 15:47:04,979 INFO L226 Difference]: Without dead ends: 2193 [2018-11-07 15:47:04,992 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:47:05,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2018-11-07 15:47:05,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 2193. [2018-11-07 15:47:05,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2193 states. [2018-11-07 15:47:05,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2193 states to 2193 states and 3506 transitions. [2018-11-07 15:47:05,222 INFO L78 Accepts]: Start accepts. Automaton has 2193 states and 3506 transitions. Word has length 67 [2018-11-07 15:47:05,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:47:05,223 INFO L480 AbstractCegarLoop]: Abstraction has 2193 states and 3506 transitions. [2018-11-07 15:47:05,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 15:47:05,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2193 states and 3506 transitions. [2018-11-07 15:47:05,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-11-07 15:47:05,242 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:47:05,242 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, 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] [2018-11-07 15:47:05,243 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:47:05,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:47:05,244 INFO L82 PathProgramCache]: Analyzing trace with hash 228041992, now seen corresponding path program 1 times [2018-11-07 15:47:05,244 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:47:05,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:47:05,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:47:05,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:47:05,246 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:47:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:47:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:47:05,533 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:47:05,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 15:47:05,533 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:47:05,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 15:47:05,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 15:47:05,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 15:47:05,536 INFO L87 Difference]: Start difference. First operand 2193 states and 3506 transitions. Second operand 5 states. [2018-11-07 15:47:14,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:47:14,277 INFO L93 Difference]: Finished difference Result 6600 states and 10738 transitions. [2018-11-07 15:47:14,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:47:14,278 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 137 [2018-11-07 15:47:14,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:47:14,315 INFO L225 Difference]: With dead ends: 6600 [2018-11-07 15:47:14,316 INFO L226 Difference]: Without dead ends: 4413 [2018-11-07 15:47:14,325 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 15:47:14,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4413 states. [2018-11-07 15:47:14,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4413 to 4378. [2018-11-07 15:47:14,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4378 states. [2018-11-07 15:47:14,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 6712 transitions. [2018-11-07 15:47:14,446 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 6712 transitions. Word has length 137 [2018-11-07 15:47:14,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:47:14,447 INFO L480 AbstractCegarLoop]: Abstraction has 4378 states and 6712 transitions. [2018-11-07 15:47:14,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 15:47:14,447 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 6712 transitions. [2018-11-07 15:47:14,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-11-07 15:47:14,452 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:47:14,452 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, 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] [2018-11-07 15:47:14,453 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:47:14,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:47:14,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1314809025, now seen corresponding path program 1 times [2018-11-07 15:47:14,453 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:47:14,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:47:14,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:47:14,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:47:14,455 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:47:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:47:14,942 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:47:14,942 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:47:14,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:47:14,943 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:47:14,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:47:14,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:47:14,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:47:14,944 INFO L87 Difference]: Start difference. First operand 4378 states and 6712 transitions. Second operand 6 states. [2018-11-07 15:47:22,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:47:22,815 INFO L93 Difference]: Finished difference Result 15364 states and 24184 transitions. [2018-11-07 15:47:22,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:47:22,818 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 164 [2018-11-07 15:47:22,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:47:22,878 INFO L225 Difference]: With dead ends: 15364 [2018-11-07 15:47:22,878 INFO L226 Difference]: Without dead ends: 10992 [2018-11-07 15:47:22,903 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 [2018-11-07 15:47:22,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10992 states. [2018-11-07 15:47:23,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10992 to 10926. [2018-11-07 15:47:23,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10926 states. [2018-11-07 15:47:23,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10926 states to 10926 states and 15805 transitions. [2018-11-07 15:47:23,206 INFO L78 Accepts]: Start accepts. Automaton has 10926 states and 15805 transitions. Word has length 164 [2018-11-07 15:47:23,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:47:23,207 INFO L480 AbstractCegarLoop]: Abstraction has 10926 states and 15805 transitions. [2018-11-07 15:47:23,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:47:23,209 INFO L276 IsEmpty]: Start isEmpty. Operand 10926 states and 15805 transitions. [2018-11-07 15:47:23,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-11-07 15:47:23,212 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:47:23,215 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, 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] [2018-11-07 15:47:23,215 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:47:23,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:47:23,216 INFO L82 PathProgramCache]: Analyzing trace with hash -446989259, now seen corresponding path program 1 times [2018-11-07 15:47:23,216 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:47:23,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:47:23,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:47:23,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:47:23,218 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:47:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:47:23,484 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:47:23,484 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:47:23,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 15:47:23,484 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:47:23,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 15:47:23,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 15:47:23,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:47:23,487 INFO L87 Difference]: Start difference. First operand 10926 states and 15805 transitions. Second operand 4 states. [2018-11-07 15:47:30,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:47:30,524 INFO L93 Difference]: Finished difference Result 26109 states and 38076 transitions. [2018-11-07 15:47:30,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 15:47:30,525 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 174 [2018-11-07 15:47:30,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:47:30,599 INFO L225 Difference]: With dead ends: 26109 [2018-11-07 15:47:30,599 INFO L226 Difference]: Without dead ends: 15189 [2018-11-07 15:47:30,633 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 15:47:30,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15189 states. [2018-11-07 15:47:30,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15189 to 15183. [2018-11-07 15:47:30,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15183 states. [2018-11-07 15:47:30,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15183 states to 15183 states and 19641 transitions. [2018-11-07 15:47:30,951 INFO L78 Accepts]: Start accepts. Automaton has 15183 states and 19641 transitions. Word has length 174 [2018-11-07 15:47:30,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:47:30,952 INFO L480 AbstractCegarLoop]: Abstraction has 15183 states and 19641 transitions. [2018-11-07 15:47:30,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 15:47:30,952 INFO L276 IsEmpty]: Start isEmpty. Operand 15183 states and 19641 transitions. [2018-11-07 15:47:30,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-11-07 15:47:30,958 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:47:30,958 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 15:47:30,958 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:47:30,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:47:30,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1032798605, now seen corresponding path program 1 times [2018-11-07 15:47:30,959 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:47:30,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:47:30,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:47:30,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:47:30,960 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:47:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:47:31,211 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:47:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 120 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 15:47:31,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:47:31,598 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 15:47:31,599 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 240 with the following transitions: [2018-11-07 15:47:31,607 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], [1951], [1959], [1967], [1975], [1983], [1991], [1999], [2007], [2015], [2023], [2031], [2039], [2047], [2055], [2059], [2061], [2064], [2072], [2080], [2088], [2096], [2104], [2112], [2117], [2121], [2125], [2129], [2133], [2137], [2141], [2144], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2201], [2205], [2209], [2213], [2216], [2996], [3000], [3004], [3010], [3014], [3016], [3025], [3026], [3027], [3029], [3030] [2018-11-07 15:47:31,672 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 15:47:31,672 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 15:47:32,200 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 15:47:32,202 INFO L272 AbstractInterpreter]: Visited 100 different actions 100 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 15:47:32,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:47:32,223 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 15:47:32,774 INFO L227 lantSequenceWeakener]: Weakened 230 states. On average, predicates are now at 78.23% of their original sizes. [2018-11-07 15:47:32,774 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 15:47:33,111 INFO L415 sIntCurrentIteration]: We unified 238 AI predicates to 238 [2018-11-07 15:47:33,111 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 15:47:33,115 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 15:47:33,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-07 15:47:33,115 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:47:33,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 15:47:33,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 15:47:33,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 15:47:33,117 INFO L87 Difference]: Start difference. First operand 15183 states and 19641 transitions. Second operand 7 states. [2018-11-07 15:47:42,182 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