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.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label33_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 02:47:17,338 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 02:47:17,342 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 02:47:17,357 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 02:47:17,358 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 02:47:17,359 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 02:47:17,360 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 02:47:17,362 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 02:47:17,363 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 02:47:17,365 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 02:47:17,366 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 02:47:17,367 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 02:47:17,367 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 02:47:17,370 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 02:47:17,373 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 02:47:17,373 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 02:47:17,377 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 02:47:17,381 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 02:47:17,383 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 02:47:17,389 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 02:47:17,390 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 02:47:17,391 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 02:47:17,396 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 02:47:17,396 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 02:47:17,397 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 02:47:17,398 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 02:47:17,398 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 02:47:17,401 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 02:47:17,402 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 02:47:17,403 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 02:47:17,405 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 02:47:17,405 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 02:47:17,406 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 02:47:17,406 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 02:47:17,407 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 02:47:17,407 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 02:47:17,408 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-11-07 02:47:17,434 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 02:47:17,434 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 02:47:17,435 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 02:47:17,435 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 02:47:17,436 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 02:47:17,436 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 02:47:17,436 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 02:47:17,436 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 02:47:17,436 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 02:47:17,440 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 02:47:17,440 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 02:47:17,440 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 02:47:17,441 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 02:47:17,441 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 02:47:17,441 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 02:47:17,441 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 02:47:17,443 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 02:47:17,444 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 02:47:17,444 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 02:47:17,444 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 02:47:17,444 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 02:47:17,444 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 02:47:17,444 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 02:47:17,445 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 02:47:17,445 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 02:47:17,445 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 02:47:17,445 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 02:47:17,446 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 02:47:17,446 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 02:47:17,446 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 02:47:17,446 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 02:47:17,446 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 02:47:17,447 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 02:47:17,447 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 02:47:17,523 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 02:47:17,538 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 02:47:17,542 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 02:47:17,544 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 02:47:17,545 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 02:47:17,545 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label33_true-unreach-call.c [2018-11-07 02:47:17,604 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/249cb2b8f/b3b7f83e830d488bbeaffe38dac9b374/FLAG9b714d75d [2018-11-07 02:47:18,126 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 02:47:18,127 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label33_true-unreach-call.c [2018-11-07 02:47:18,148 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/249cb2b8f/b3b7f83e830d488bbeaffe38dac9b374/FLAG9b714d75d [2018-11-07 02:47:18,167 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/249cb2b8f/b3b7f83e830d488bbeaffe38dac9b374 [2018-11-07 02:47:18,177 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 02:47:18,178 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 02:47:18,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 02:47:18,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 02:47:18,183 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 02:47:18,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:47:18" (1/1) ... [2018-11-07 02:47:18,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5830c978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:47:18, skipping insertion in model container [2018-11-07 02:47:18,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:47:18" (1/1) ... [2018-11-07 02:47:18,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 02:47:18,270 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 02:47:18,783 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 02:47:18,788 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 02:47:18,929 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 02:47:18,949 INFO L193 MainTranslator]: Completed translation [2018-11-07 02:47:18,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:47:18 WrapperNode [2018-11-07 02:47:18,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 02:47:18,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 02:47:18,951 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 02:47:18,951 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 02:47:18,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:47:18" (1/1) ... [2018-11-07 02:47:18,977 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:47:18" (1/1) ... [2018-11-07 02:47:19,083 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 02:47:19,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 02:47:19,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 02:47:19,084 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 02:47:19,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:47:18" (1/1) ... [2018-11-07 02:47:19,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:47:18" (1/1) ... [2018-11-07 02:47:19,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:47:18" (1/1) ... [2018-11-07 02:47:19,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:47:18" (1/1) ... [2018-11-07 02:47:19,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:47:18" (1/1) ... [2018-11-07 02:47:19,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:47:18" (1/1) ... [2018-11-07 02:47:19,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:47:18" (1/1) ... [2018-11-07 02:47:19,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 02:47:19,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 02:47:19,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 02:47:19,222 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 02:47:19,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:47:18" (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 02:47:19,288 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 02:47:19,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 02:47:19,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 02:47:19,289 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 02:47:19,289 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 02:47:19,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 02:47:19,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 02:47:19,290 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 02:47:19,290 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 02:47:22,225 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 02:47:22,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:47:22 BoogieIcfgContainer [2018-11-07 02:47:22,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 02:47:22,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 02:47:22,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 02:47:22,231 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 02:47:22,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:47:18" (1/3) ... [2018-11-07 02:47:22,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79f69edb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:47:22, skipping insertion in model container [2018-11-07 02:47:22,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:47:18" (2/3) ... [2018-11-07 02:47:22,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79f69edb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:47:22, skipping insertion in model container [2018-11-07 02:47:22,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:47:22" (3/3) ... [2018-11-07 02:47:22,235 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem10_label33_true-unreach-call.c [2018-11-07 02:47:22,243 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 02:47:22,251 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 02:47:22,269 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 02:47:22,307 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 02:47:22,307 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 02:47:22,307 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 02:47:22,307 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 02:47:22,308 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 02:47:22,308 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 02:47:22,308 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 02:47:22,308 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 02:47:22,335 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states. [2018-11-07 02:47:22,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-11-07 02:47:22,345 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 02:47:22,346 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] [2018-11-07 02:47:22,348 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 02:47:22,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 02:47:22,355 INFO L82 PathProgramCache]: Analyzing trace with hash 2083208225, now seen corresponding path program 1 times [2018-11-07 02:47:22,357 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 02:47:22,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 02:47:22,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 02:47:22,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 02:47:22,403 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 02:47:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 02:47:22,878 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-11-07 02:47:22,897 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 02:47:22,900 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 02:47:22,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 02:47:22,901 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 02:47:22,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 02:47:22,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 02:47:22,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 02:47:22,931 INFO L87 Difference]: Start difference. First operand 216 states. Second operand 4 states. [2018-11-07 02:47:25,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 02:47:25,138 INFO L93 Difference]: Finished difference Result 737 states and 1298 transitions. [2018-11-07 02:47:25,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 02:47:25,140 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2018-11-07 02:47:25,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 02:47:25,161 INFO L225 Difference]: With dead ends: 737 [2018-11-07 02:47:25,162 INFO L226 Difference]: Without dead ends: 515 [2018-11-07 02:47:25,171 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 02:47:25,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2018-11-07 02:47:25,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 356. [2018-11-07 02:47:25,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2018-11-07 02:47:25,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 579 transitions. [2018-11-07 02:47:25,262 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 579 transitions. Word has length 51 [2018-11-07 02:47:25,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 02:47:25,263 INFO L480 AbstractCegarLoop]: Abstraction has 356 states and 579 transitions. [2018-11-07 02:47:25,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 02:47:25,263 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 579 transitions. [2018-11-07 02:47:25,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-11-07 02:47:25,272 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 02:47:25,273 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:47:25,273 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 02:47:25,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 02:47:25,274 INFO L82 PathProgramCache]: Analyzing trace with hash 273231611, now seen corresponding path program 1 times [2018-11-07 02:47:25,274 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 02:47:25,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 02:47:25,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 02:47:25,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 02:47:25,276 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 02:47:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 02:47:25,615 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 02:47:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 02:47:25,764 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 02:47:25,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 02:47:25,764 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 02:47:25,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 02:47:25,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 02:47:25,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 02:47:25,768 INFO L87 Difference]: Start difference. First operand 356 states and 579 transitions. Second operand 6 states. [2018-11-07 02:47:28,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 02:47:28,522 INFO L93 Difference]: Finished difference Result 1259 states and 2162 transitions. [2018-11-07 02:47:28,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 02:47:28,523 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2018-11-07 02:47:28,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 02:47:28,532 INFO L225 Difference]: With dead ends: 1259 [2018-11-07 02:47:28,533 INFO L226 Difference]: Without dead ends: 909 [2018-11-07 02:47:28,537 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 02:47:28,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2018-11-07 02:47:28,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 895. [2018-11-07 02:47:28,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 895 states. [2018-11-07 02:47:28,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1370 transitions. [2018-11-07 02:47:28,629 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1370 transitions. Word has length 126 [2018-11-07 02:47:28,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 02:47:28,630 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 1370 transitions. [2018-11-07 02:47:28,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 02:47:28,630 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1370 transitions. [2018-11-07 02:47:28,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-11-07 02:47:28,646 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 02:47:28,646 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:47:28,648 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 02:47:28,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 02:47:28,649 INFO L82 PathProgramCache]: Analyzing trace with hash 784908603, now seen corresponding path program 1 times [2018-11-07 02:47:28,649 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 02:47:28,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 02:47:28,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 02:47:28,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 02:47:28,651 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 02:47:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 02:47:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-07 02:47:29,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 02:47:29,008 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 02:47:29,009 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 159 with the following transitions: [2018-11-07 02:47:29,017 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [309], [311], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [642], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 02:47:29,104 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-07 02:47:29,104 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 02:47:32,863 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 02:47:32,865 INFO L272 AbstractInterpreter]: Visited 111 different actions 111 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 02:47:32,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 02:47:32,896 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 02:47:35,488 INFO L227 lantSequenceWeakener]: Weakened 143 states. On average, predicates are now at 74.14% of their original sizes. [2018-11-07 02:47:35,488 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 02:47:41,089 INFO L415 sIntCurrentIteration]: We unified 157 AI predicates to 157 [2018-11-07 02:47:41,089 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 02:47:41,090 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 02:47:41,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [4] total 12 [2018-11-07 02:47:41,091 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 02:47:41,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 02:47:41,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 02:47:41,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-11-07 02:47:41,093 INFO L87 Difference]: Start difference. First operand 895 states and 1370 transitions. Second operand 10 states. [2018-11-07 02:47:52,976 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 02:48:34,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 02:48:34,304 INFO L93 Difference]: Finished difference Result 1933 states and 2971 transitions. [2018-11-07 02:48:34,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 02:48:34,304 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 158 [2018-11-07 02:48:34,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 02:48:34,311 INFO L225 Difference]: With dead ends: 1933 [2018-11-07 02:48:34,311 INFO L226 Difference]: Without dead ends: 1044 [2018-11-07 02:48:34,315 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 161 GetRequests, 113 SyntacticMatches, 36 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-11-07 02:48:34,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2018-11-07 02:48:34,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 1039. [2018-11-07 02:48:34,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2018-11-07 02:48:34,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1521 transitions. [2018-11-07 02:48:34,374 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1521 transitions. Word has length 158 [2018-11-07 02:48:34,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 02:48:34,375 INFO L480 AbstractCegarLoop]: Abstraction has 1039 states and 1521 transitions. [2018-11-07 02:48:34,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 02:48:34,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1521 transitions. [2018-11-07 02:48:34,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-11-07 02:48:34,380 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 02:48:34,380 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, 2, 2, 2, 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 02:48:34,381 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 02:48:34,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 02:48:34,381 INFO L82 PathProgramCache]: Analyzing trace with hash 732780905, now seen corresponding path program 1 times [2018-11-07 02:48:34,382 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 02:48:34,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 02:48:34,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 02:48:34,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 02:48:34,383 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 02:48:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 02:48:34,692 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 02:48:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-11-07 02:48:34,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 02:48:34,912 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 02:48:34,913 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 230 with the following transitions: [2018-11-07 02:48:34,913 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [309], [311], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [642], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 02:48:34,919 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-07 02:48:34,920 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 02:48:36,065 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 02:48:51,827 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 02:48:51,828 INFO L272 AbstractInterpreter]: Visited 115 different actions 660 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 02:48:51,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 02:48:51,839 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 02:48:54,132 INFO L227 lantSequenceWeakener]: Weakened 52 states. On average, predicates are now at 76.84% of their original sizes. [2018-11-07 02:48:54,132 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 02:49:18,152 INFO L415 sIntCurrentIteration]: We unified 228 AI predicates to 228 [2018-11-07 02:49:18,152 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 02:49:18,152 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 02:49:18,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [4] total 23 [2018-11-07 02:49:18,153 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 02:49:18,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-07 02:49:18,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-07 02:49:18,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2018-11-07 02:49:18,154 INFO L87 Difference]: Start difference. First operand 1039 states and 1521 transitions. Second operand 21 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown