java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label21_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 23:54:00,050 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 23:54:00,057 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 23:54:00,073 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 23:54:00,074 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 23:54:00,075 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 23:54:00,076 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 23:54:00,078 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 23:54:00,080 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 23:54:00,081 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 23:54:00,082 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 23:54:00,082 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 23:54:00,083 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 23:54:00,084 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 23:54:00,085 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 23:54:00,086 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 23:54:00,087 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 23:54:00,089 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 23:54:00,091 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 23:54:00,093 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 23:54:00,095 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 23:54:00,096 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 23:54:00,099 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 23:54:00,099 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 23:54:00,099 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 23:54:00,100 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 23:54:00,101 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 23:54:00,102 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 23:54:00,103 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 23:54:00,104 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 23:54:00,104 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 23:54:00,105 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-24 23:54:00,108 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-24 23:54:00,137 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 23:54:00,137 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 23:54:00,141 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 23:54:00,141 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 23:54:00,141 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 23:54:00,142 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 23:54:00,142 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-24 23:54:00,142 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 23:54:00,142 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-24 23:54:00,142 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 23:54:00,143 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 23:54:00,143 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 23:54:00,143 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 23:54:00,143 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 23:54:00,144 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 23:54:00,144 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 23:54:00,144 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 23:54:00,145 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 23:54:00,145 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 23:54:00,145 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 23:54:00,145 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 23:54:00,145 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 23:54:00,146 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 23:54:00,146 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 23:54:00,146 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 23:54:00,146 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 23:54:00,146 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 23:54:00,147 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 23:54:00,147 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 23:54:00,147 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 23:54:00,147 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 23:54:00,147 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 23:54:00,147 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 23:54:00,148 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 23:54:00,148 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 23:54:00,148 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 23:54:00,196 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 23:54:00,212 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 23:54:00,216 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 23:54:00,218 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 23:54:00,218 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 23:54:00,219 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label21_false-unreach-call.c [2018-10-24 23:54:00,287 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/58d531446/788321fa205742889405c68602eebe45/FLAGe143ca2ab [2018-10-24 23:54:01,192 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 23:54:01,193 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem19_label21_false-unreach-call.c [2018-10-24 23:54:01,243 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/58d531446/788321fa205742889405c68602eebe45/FLAGe143ca2ab [2018-10-24 23:54:01,267 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/58d531446/788321fa205742889405c68602eebe45 [2018-10-24 23:54:01,280 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 23:54:01,282 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 23:54:01,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 23:54:01,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 23:54:01,288 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 23:54:01,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:54:01" (1/1) ... [2018-10-24 23:54:01,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13d23e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:01, skipping insertion in model container [2018-10-24 23:54:01,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:54:01" (1/1) ... [2018-10-24 23:54:01,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 23:54:01,539 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 23:54:03,482 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 23:54:03,488 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 23:54:04,603 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 23:54:04,659 INFO L193 MainTranslator]: Completed translation [2018-10-24 23:54:04,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:04 WrapperNode [2018-10-24 23:54:04,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 23:54:04,661 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 23:54:04,661 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 23:54:04,662 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 23:54:04,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:04" (1/1) ... [2018-10-24 23:54:04,789 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:04" (1/1) ... [2018-10-24 23:54:05,422 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 23:54:05,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 23:54:05,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 23:54:05,423 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 23:54:05,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:04" (1/1) ... [2018-10-24 23:54:05,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:04" (1/1) ... [2018-10-24 23:54:05,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:04" (1/1) ... [2018-10-24 23:54:05,489 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:04" (1/1) ... [2018-10-24 23:54:05,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:04" (1/1) ... [2018-10-24 23:54:05,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:04" (1/1) ... [2018-10-24 23:54:05,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:04" (1/1) ... [2018-10-24 23:54:06,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 23:54:06,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 23:54:06,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 23:54:06,029 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 23:54:06,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 23:54:06,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 23:54:06,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 23:54:06,103 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2018-10-24 23:54:06,103 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2018-10-24 23:54:06,104 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2018-10-24 23:54:06,104 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2018-10-24 23:54:06,104 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-24 23:54:06,104 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-24 23:54:06,104 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-24 23:54:06,105 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-24 23:54:06,105 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-24 23:54:06,106 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-24 23:54:06,106 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 23:54:06,106 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 23:54:06,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 23:54:06,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 23:54:06,107 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 23:54:06,107 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 23:54:25,053 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 23:54:25,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:54:25 BoogieIcfgContainer [2018-10-24 23:54:25,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 23:54:25,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 23:54:25,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 23:54:25,059 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 23:54:25,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:54:01" (1/3) ... [2018-10-24 23:54:25,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12736846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:54:25, skipping insertion in model container [2018-10-24 23:54:25,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:04" (2/3) ... [2018-10-24 23:54:25,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12736846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:54:25, skipping insertion in model container [2018-10-24 23:54:25,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:54:25" (3/3) ... [2018-10-24 23:54:25,063 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label21_false-unreach-call.c [2018-10-24 23:54:25,074 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 23:54:25,085 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 23:54:25,103 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 23:54:25,171 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 23:54:25,171 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 23:54:25,171 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 23:54:25,172 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 23:54:25,172 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 23:54:25,172 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 23:54:25,172 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 23:54:25,172 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 23:54:25,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states. [2018-10-24 23:54:25,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-24 23:54:25,253 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:54:25,254 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] [2018-10-24 23:54:25,259 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:54:25,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:54:25,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1007746148, now seen corresponding path program 1 times [2018-10-24 23:54:25,269 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:54:25,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:54:25,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:54:25,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:54:25,317 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:54:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:54:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:54:25,707 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:54:25,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 23:54:25,708 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:54:25,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 23:54:25,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 23:54:25,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 23:54:25,743 INFO L87 Difference]: Start difference. First operand 1778 states. Second operand 3 states. [2018-10-24 23:54:43,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:54:43,218 INFO L93 Difference]: Finished difference Result 4999 states and 9420 transitions. [2018-10-24 23:54:43,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 23:54:43,220 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2018-10-24 23:54:43,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:54:43,276 INFO L225 Difference]: With dead ends: 4999 [2018-10-24 23:54:43,277 INFO L226 Difference]: Without dead ends: 3219 [2018-10-24 23:54:43,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 23:54:43,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2018-10-24 23:54:43,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 3215. [2018-10-24 23:54:43,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3215 states. [2018-10-24 23:54:43,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3215 states to 3215 states and 5845 transitions. [2018-10-24 23:54:43,542 INFO L78 Accepts]: Start accepts. Automaton has 3215 states and 5845 transitions. Word has length 22 [2018-10-24 23:54:43,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:54:43,543 INFO L481 AbstractCegarLoop]: Abstraction has 3215 states and 5845 transitions. [2018-10-24 23:54:43,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 23:54:43,543 INFO L276 IsEmpty]: Start isEmpty. Operand 3215 states and 5845 transitions. [2018-10-24 23:54:43,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-24 23:54:43,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:54:43,554 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 23:54:43,555 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:54:43,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:54:43,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1291939045, now seen corresponding path program 1 times [2018-10-24 23:54:43,556 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:54:43,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:54:43,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:54:43,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:54:43,558 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:54:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:54:43,937 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 23:54:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:54:44,342 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:54:44,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 23:54:44,342 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:54:44,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 23:54:44,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 23:54:44,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 23:54:44,345 INFO L87 Difference]: Start difference. First operand 3215 states and 5845 transitions. Second operand 6 states. [2018-10-24 23:55:11,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:55:11,807 INFO L93 Difference]: Finished difference Result 10735 states and 19736 transitions. [2018-10-24 23:55:11,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 23:55:11,807 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2018-10-24 23:55:11,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:55:11,853 INFO L225 Difference]: With dead ends: 10735 [2018-10-24 23:55:11,853 INFO L226 Difference]: Without dead ends: 7526 [2018-10-24 23:55:11,866 INFO L605 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 [2018-10-24 23:55:11,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7526 states. [2018-10-24 23:55:12,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7526 to 7491. [2018-10-24 23:55:12,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7491 states. [2018-10-24 23:55:12,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7491 states to 7491 states and 12431 transitions. [2018-10-24 23:55:12,095 INFO L78 Accepts]: Start accepts. Automaton has 7491 states and 12431 transitions. Word has length 94 [2018-10-24 23:55:12,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:55:12,100 INFO L481 AbstractCegarLoop]: Abstraction has 7491 states and 12431 transitions. [2018-10-24 23:55:12,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 23:55:12,101 INFO L276 IsEmpty]: Start isEmpty. Operand 7491 states and 12431 transitions. [2018-10-24 23:55:12,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-24 23:55:12,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:55:12,108 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 23:55:12,108 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:55:12,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:55:12,110 INFO L82 PathProgramCache]: Analyzing trace with hash -595844263, now seen corresponding path program 1 times [2018-10-24 23:55:12,110 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:55:12,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:55:12,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:55:12,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:55:12,112 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:55:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:55:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:55:12,399 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:55:12,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 23:55:12,399 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:55:12,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 23:55:12,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 23:55:12,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-24 23:55:12,400 INFO L87 Difference]: Start difference. First operand 7491 states and 12431 transitions. Second operand 6 states. [2018-10-24 23:55:55,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:55:55,752 INFO L93 Difference]: Finished difference Result 27079 states and 45734 transitions. [2018-10-24 23:55:55,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 23:55:55,753 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 112 [2018-10-24 23:55:55,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:55:55,860 INFO L225 Difference]: With dead ends: 27079 [2018-10-24 23:55:55,860 INFO L226 Difference]: Without dead ends: 19594 [2018-10-24 23:55:55,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-24 23:55:55,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19594 states. [2018-10-24 23:55:56,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19594 to 19510. [2018-10-24 23:55:56,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19510 states. [2018-10-24 23:55:56,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19510 states to 19510 states and 28727 transitions. [2018-10-24 23:55:56,415 INFO L78 Accepts]: Start accepts. Automaton has 19510 states and 28727 transitions. Word has length 112 [2018-10-24 23:55:56,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:55:56,416 INFO L481 AbstractCegarLoop]: Abstraction has 19510 states and 28727 transitions. [2018-10-24 23:55:56,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 23:55:56,416 INFO L276 IsEmpty]: Start isEmpty. Operand 19510 states and 28727 transitions. [2018-10-24 23:55:56,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-24 23:55:56,422 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:55:56,423 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 23:55:56,423 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:55:56,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:55:56,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1097875112, now seen corresponding path program 1 times [2018-10-24 23:55:56,424 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:55:56,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:55:56,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:55:56,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:55:56,425 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:55:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:55:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:55:56,785 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:55:56,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 23:55:56,786 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:55:56,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 23:55:56,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 23:55:56,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 23:55:56,788 INFO L87 Difference]: Start difference. First operand 19510 states and 28727 transitions. Second operand 5 states. [2018-10-24 23:56:18,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:56:18,728 INFO L93 Difference]: Finished difference Result 59191 states and 91649 transitions. [2018-10-24 23:56:18,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 23:56:18,729 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2018-10-24 23:56:18,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:56:18,888 INFO L225 Difference]: With dead ends: 59191 [2018-10-24 23:56:18,889 INFO L226 Difference]: Without dead ends: 39687 [2018-10-24 23:56:18,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-24 23:56:18,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39687 states. [2018-10-24 23:56:19,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39687 to 38622. [2018-10-24 23:56:19,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38622 states. [2018-10-24 23:56:20,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38622 states to 38622 states and 52766 transitions. [2018-10-24 23:56:20,288 INFO L78 Accepts]: Start accepts. Automaton has 38622 states and 52766 transitions. Word has length 157 [2018-10-24 23:56:20,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:56:20,289 INFO L481 AbstractCegarLoop]: Abstraction has 38622 states and 52766 transitions. [2018-10-24 23:56:20,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 23:56:20,289 INFO L276 IsEmpty]: Start isEmpty. Operand 38622 states and 52766 transitions. [2018-10-24 23:56:20,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-24 23:56:20,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:56:20,295 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 23:56:20,295 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:56:20,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:56:20,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1172794602, now seen corresponding path program 1 times [2018-10-24 23:56:20,300 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:56:20,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:56:20,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:56:20,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:56:20,301 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:56:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:56:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 30 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 23:56:20,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:56:20,841 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:56:20,842 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 178 with the following transitions: [2018-10-24 23:56:20,845 INFO L202 CegarAbsIntRunner]: [0], [1], [5227], [5234], [5242], [5250], [5258], [5266], [5274], [5282], [5290], [5298], [5302], [5304], [5307], [5315], [5323], [5331], [5339], [5347], [5355], [5363], [5371], [5379], [5387], [5395], [5403], [5411], [5419], [5427], [5435], [5443], [5451], [5459], [5467], [5475], [5483], [5491], [5499], [5507], [5515], [5523], [5531], [5539], [5547], [5555], [5563], [5571], [5579], [5587], [5595], [5603], [5611], [5619], [5627], [5635], [5643], [5651], [5659], [5667], [5675], [5683], [5691], [5699], [5707], [5715], [5727], [5731], [5742], [5745], [5746], [5750], [5754], [5758], [5762], [5766], [5770], [5774], [5778], [5781], [6802], [6806], [6810], [6816], [6820], [6822], [6837], [6838], [6839], [6841], [6842] [2018-10-24 23:56:20,890 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:56:20,890 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:56:21,339 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 23:56:21,340 INFO L272 AbstractInterpreter]: Visited 87 different actions 87 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-24 23:56:21,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:56:21,383 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 23:56:21,774 INFO L232 lantSequenceWeakener]: Weakened 168 states. On average, predicates are now at 75.05% of their original sizes. [2018-10-24 23:56:21,774 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 23:56:22,030 INFO L413 sIntCurrentIteration]: We have 176 unified AI predicates [2018-10-24 23:56:22,030 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 23:56:22,031 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 23:56:22,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2018-10-24 23:56:22,032 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:56:22,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 23:56:22,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 23:56:22,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 23:56:22,033 INFO L87 Difference]: Start difference. First operand 38622 states and 52766 transitions. Second operand 6 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown