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/Problem12_label26_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 14:41:09,173 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 14:41:09,176 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 14:41:09,191 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 14:41:09,191 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 14:41:09,192 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 14:41:09,194 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 14:41:09,197 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 14:41:09,199 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 14:41:09,200 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 14:41:09,206 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 14:41:09,206 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 14:41:09,211 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 14:41:09,212 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 14:41:09,213 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 14:41:09,215 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 14:41:09,216 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 14:41:09,221 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 14:41:09,224 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 14:41:09,226 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 14:41:09,227 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 14:41:09,230 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 14:41:09,232 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 14:41:09,234 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 14:41:09,235 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 14:41:09,236 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 14:41:09,237 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 14:41:09,237 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 14:41:09,238 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 14:41:09,239 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 14:41:09,239 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 14:41:09,240 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 14:41:09,240 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 14:41:09,240 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 14:41:09,241 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 14:41:09,242 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 14:41:09,242 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 14:41:09,258 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 14:41:09,258 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 14:41:09,258 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 14:41:09,259 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 14:41:09,259 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 14:41:09,259 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 14:41:09,259 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 14:41:09,259 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 14:41:09,260 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 14:41:09,260 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 14:41:09,260 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 14:41:09,260 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 14:41:09,261 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 14:41:09,261 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 14:41:09,261 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 14:41:09,261 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 14:41:09,262 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 14:41:09,262 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 14:41:09,262 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 14:41:09,262 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 14:41:09,262 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 14:41:09,263 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 14:41:09,263 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 14:41:09,263 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 14:41:09,263 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 14:41:09,264 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 14:41:09,264 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 14:41:09,264 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 14:41:09,264 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 14:41:09,264 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 14:41:09,264 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 14:41:09,265 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 14:41:09,265 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 14:41:09,265 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 14:41:09,318 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 14:41:09,337 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 14:41:09,341 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 14:41:09,343 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 14:41:09,343 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 14:41:09,344 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label26_true-unreach-call.c [2018-11-07 14:41:09,405 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/785ae338d/06497bac6c934420b9c44731cac984e9/FLAGda599c9fd [2018-11-07 14:41:10,159 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 14:41:10,160 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label26_true-unreach-call.c [2018-11-07 14:41:10,189 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/785ae338d/06497bac6c934420b9c44731cac984e9/FLAGda599c9fd [2018-11-07 14:41:10,206 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/785ae338d/06497bac6c934420b9c44731cac984e9 [2018-11-07 14:41:10,218 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 14:41:10,219 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 14:41:10,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 14:41:10,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 14:41:10,225 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 14:41:10,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:41:10" (1/1) ... [2018-11-07 14:41:10,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a760589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:10, skipping insertion in model container [2018-11-07 14:41:10,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:41:10" (1/1) ... [2018-11-07 14:41:10,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 14:41:10,390 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 14:41:11,664 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 14:41:11,669 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 14:41:12,262 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 14:41:12,298 INFO L193 MainTranslator]: Completed translation [2018-11-07 14:41:12,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:12 WrapperNode [2018-11-07 14:41:12,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 14:41:12,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 14:41:12,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 14:41:12,301 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 14:41:12,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:12" (1/1) ... [2018-11-07 14:41:12,633 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:12" (1/1) ... [2018-11-07 14:41:12,642 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 14:41:12,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 14:41:12,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 14:41:12,643 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 14:41:12,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:12" (1/1) ... [2018-11-07 14:41:12,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:12" (1/1) ... [2018-11-07 14:41:12,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:12" (1/1) ... [2018-11-07 14:41:12,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:12" (1/1) ... [2018-11-07 14:41:12,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:12" (1/1) ... [2018-11-07 14:41:12,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:12" (1/1) ... [2018-11-07 14:41:12,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:12" (1/1) ... [2018-11-07 14:41:12,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 14:41:12,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 14:41:12,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 14:41:12,923 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 14:41:12,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:12" (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 14:41:12,996 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 14:41:12,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 14:41:12,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 14:41:12,997 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-11-07 14:41:12,997 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-11-07 14:41:12,998 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-11-07 14:41:12,998 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-11-07 14:41:12,998 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 14:41:12,998 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 14:41:12,999 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 14:41:12,999 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 14:41:12,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 14:41:13,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 14:41:13,002 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 14:41:13,002 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 14:41:22,893 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 14:41:22,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:41:22 BoogieIcfgContainer [2018-11-07 14:41:22,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 14:41:22,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 14:41:22,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 14:41:22,898 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 14:41:22,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:41:10" (1/3) ... [2018-11-07 14:41:22,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659ccf5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:41:22, skipping insertion in model container [2018-11-07 14:41:22,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:12" (2/3) ... [2018-11-07 14:41:22,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659ccf5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:41:22, skipping insertion in model container [2018-11-07 14:41:22,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:41:22" (3/3) ... [2018-11-07 14:41:22,902 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label26_true-unreach-call.c [2018-11-07 14:41:22,913 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 14:41:22,923 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 14:41:22,942 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 14:41:23,084 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 14:41:23,085 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 14:41:23,085 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 14:41:23,085 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 14:41:23,085 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 14:41:23,085 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 14:41:23,085 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 14:41:23,085 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 14:41:23,171 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states. [2018-11-07 14:41:23,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-07 14:41:23,179 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 14:41:23,180 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 14:41:23,182 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 14:41:23,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:41:23,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1342118596, now seen corresponding path program 1 times [2018-11-07 14:41:23,192 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 14:41:23,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:41:23,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:41:23,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:41:23,245 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 14:41:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:41:23,743 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 14:41:23,745 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 14:41:23,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 14:41:23,746 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 14:41:23,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 14:41:23,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 14:41:23,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 14:41:23,773 INFO L87 Difference]: Start difference. First operand 840 states. Second operand 4 states. [2018-11-07 14:41:35,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 14:41:35,672 INFO L93 Difference]: Finished difference Result 3234 states and 6255 transitions. [2018-11-07 14:41:35,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 14:41:35,674 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2018-11-07 14:41:35,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 14:41:35,711 INFO L225 Difference]: With dead ends: 3234 [2018-11-07 14:41:35,711 INFO L226 Difference]: Without dead ends: 2388 [2018-11-07 14:41:35,722 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 14:41:35,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2018-11-07 14:41:35,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 1604. [2018-11-07 14:41:35,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1604 states. [2018-11-07 14:41:35,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2600 transitions. [2018-11-07 14:41:35,897 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2600 transitions. Word has length 52 [2018-11-07 14:41:35,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 14:41:35,898 INFO L480 AbstractCegarLoop]: Abstraction has 1604 states and 2600 transitions. [2018-11-07 14:41:35,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 14:41:35,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2600 transitions. [2018-11-07 14:41:35,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-11-07 14:41:35,910 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 14:41:35,911 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 14:41:35,911 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 14:41:35,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:41:35,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1915502122, now seen corresponding path program 1 times [2018-11-07 14:41:35,912 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 14:41:35,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:41:35,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:41:35,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:41:35,914 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 14:41:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:41:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 14:41:36,330 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 14:41:36,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 14:41:36,331 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 14:41:36,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 14:41:36,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 14:41:36,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-07 14:41:36,333 INFO L87 Difference]: Start difference. First operand 1604 states and 2600 transitions. Second operand 5 states. [2018-11-07 14:41:47,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 14:41:47,474 INFO L93 Difference]: Finished difference Result 4873 states and 7923 transitions. [2018-11-07 14:41:47,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 14:41:47,476 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2018-11-07 14:41:47,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 14:41:47,502 INFO L225 Difference]: With dead ends: 4873 [2018-11-07 14:41:47,502 INFO L226 Difference]: Without dead ends: 3275 [2018-11-07 14:41:47,508 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 14:41:47,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3275 states. [2018-11-07 14:41:47,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3275 to 3241. [2018-11-07 14:41:47,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3241 states. [2018-11-07 14:41:47,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3241 states to 3241 states and 4816 transitions. [2018-11-07 14:41:47,644 INFO L78 Accepts]: Start accepts. Automaton has 3241 states and 4816 transitions. Word has length 132 [2018-11-07 14:41:47,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 14:41:47,645 INFO L480 AbstractCegarLoop]: Abstraction has 3241 states and 4816 transitions. [2018-11-07 14:41:47,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 14:41:47,645 INFO L276 IsEmpty]: Start isEmpty. Operand 3241 states and 4816 transitions. [2018-11-07 14:41:47,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-11-07 14:41:47,650 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 14:41:47,650 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 14:41:47,651 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 14:41:47,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:41:47,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1363927151, now seen corresponding path program 1 times [2018-11-07 14:41:47,651 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 14:41:47,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:41:47,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:41:47,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:41:47,653 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 14:41:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:41:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 14:41:47,942 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 14:41:47,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 14:41:47,942 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 14:41:47,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 14:41:47,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 14:41:47,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 14:41:47,943 INFO L87 Difference]: Start difference. First operand 3241 states and 4816 transitions. Second operand 6 states. [2018-11-07 14:41:54,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 14:41:54,658 INFO L93 Difference]: Finished difference Result 9805 states and 14879 transitions. [2018-11-07 14:41:54,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 14:41:54,659 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 161 [2018-11-07 14:41:54,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 14:41:54,704 INFO L225 Difference]: With dead ends: 9805 [2018-11-07 14:41:54,704 INFO L226 Difference]: Without dead ends: 6570 [2018-11-07 14:41:54,715 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 14:41:54,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6570 states. [2018-11-07 14:41:54,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6570 to 6496. [2018-11-07 14:41:54,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6496 states. [2018-11-07 14:41:54,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6496 states to 6496 states and 9467 transitions. [2018-11-07 14:41:54,940 INFO L78 Accepts]: Start accepts. Automaton has 6496 states and 9467 transitions. Word has length 161 [2018-11-07 14:41:54,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 14:41:54,941 INFO L480 AbstractCegarLoop]: Abstraction has 6496 states and 9467 transitions. [2018-11-07 14:41:54,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 14:41:54,942 INFO L276 IsEmpty]: Start isEmpty. Operand 6496 states and 9467 transitions. [2018-11-07 14:41:54,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-07 14:41:54,946 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 14:41:54,946 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:54,947 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 14:41:54,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:41:54,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1064317105, now seen corresponding path program 1 times [2018-11-07 14:41:54,947 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 14:41:54,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:41:54,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:41:54,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:41:54,952 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 14:41:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:41:55,283 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 14:41:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 14:41:55,699 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 14:41:55,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 14:41:55,699 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 14:41:55,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 14:41:55,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 14:41:55,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 14:41:55,701 INFO L87 Difference]: Start difference. First operand 6496 states and 9467 transitions. Second operand 6 states. [2018-11-07 14:42:04,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 14:42:04,968 INFO L93 Difference]: Finished difference Result 21863 states and 33123 transitions. [2018-11-07 14:42:04,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 14:42:04,969 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 177 [2018-11-07 14:42:04,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 14:42:05,042 INFO L225 Difference]: With dead ends: 21863 [2018-11-07 14:42:05,042 INFO L226 Difference]: Without dead ends: 15373 [2018-11-07 14:42:05,076 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 14:42:05,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15373 states. [2018-11-07 14:42:05,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15373 to 15285. [2018-11-07 14:42:05,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15285 states. [2018-11-07 14:42:05,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15285 states to 15285 states and 21402 transitions. [2018-11-07 14:42:05,441 INFO L78 Accepts]: Start accepts. Automaton has 15285 states and 21402 transitions. Word has length 177 [2018-11-07 14:42:05,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 14:42:05,441 INFO L480 AbstractCegarLoop]: Abstraction has 15285 states and 21402 transitions. [2018-11-07 14:42:05,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 14:42:05,442 INFO L276 IsEmpty]: Start isEmpty. Operand 15285 states and 21402 transitions. [2018-11-07 14:42:05,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-11-07 14:42:05,446 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 14:42:05,446 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:42:05,447 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 14:42:05,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:42:05,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1136410638, now seen corresponding path program 1 times [2018-11-07 14:42:05,447 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 14:42:05,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:42:05,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:42:05,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:42:05,449 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 14:42:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:42:05,728 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 14:42:05,899 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-07 14:42:05,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 14:42:05,900 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 14:42:05,901 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 199 with the following transitions: [2018-11-07 14:42:05,904 INFO L202 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2027], [2035], [2043], [2051], [2059], [2067], [2075], [2083], [2091], [2099], [2107], [2115], [2123], [2131], [2139], [2147], [2155], [2163], [2171], [2179], [2183], [2185], [2188], [2196], [2204], [2212], [2220], [2228], [2236], [2244], [2252], [2260], [2268], [2276], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2377], [2381], [2385], [2389], [2393], [2397], [2401], [2405], [2409], [2413], [2417], [2421], [2425], [2429], [2433], [2437], [2441], [2445], [2449], [2453], [2457], [2461], [2465], [2469], [2473], [2477], [2481], [2485], [2489], [2493], [2497], [2501], [2505], [2509], [2513], [2517], [2521], [2525], [2529], [2533], [2537], [2541], [2545], [2549], [2553], [2557], [2561], [2565], [2569], [2573], [2577], [2581], [2585], [2589], [2593], [2597], [2601], [2605], [2609], [2613], [2617], [2621], [2625], [2629], [2633], [2637], [2641], [2645], [2649], [2653], [2657], [2661], [2664], [3240], [3244], [3248], [3254], [3258], [3260], [3271], [3272], [3273], [3275], [3276] [2018-11-07 14:42:05,956 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 14:42:05,956 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 14:42:06,709 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 14:42:07,790 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 14:42:07,792 INFO L272 AbstractInterpreter]: Visited 153 different actions 300 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 14:42:07,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:42:07,839 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 14:42:08,851 INFO L227 lantSequenceWeakener]: Weakened 118 states. On average, predicates are now at 76.5% of their original sizes. [2018-11-07 14:42:08,851 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 14:42:10,074 INFO L415 sIntCurrentIteration]: We unified 197 AI predicates to 197 [2018-11-07 14:42:10,075 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 14:42:10,076 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 14:42:10,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [4] total 20 [2018-11-07 14:42:10,076 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 14:42:10,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 14:42:10,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 14:42:10,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2018-11-07 14:42:10,078 INFO L87 Difference]: Start difference. First operand 15285 states and 21402 transitions. Second operand 18 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown