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/Problem14_label52_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 12:06:07,989 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 12:06:07,991 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 12:06:08,005 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 12:06:08,006 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 12:06:08,007 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 12:06:08,008 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 12:06:08,011 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 12:06:08,013 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 12:06:08,015 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 12:06:08,016 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 12:06:08,019 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 12:06:08,020 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 12:06:08,021 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 12:06:08,022 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 12:06:08,024 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 12:06:08,025 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 12:06:08,029 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 12:06:08,038 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 12:06:08,043 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 12:06:08,044 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 12:06:08,046 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 12:06:08,051 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 12:06:08,051 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 12:06:08,051 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 12:06:08,052 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 12:06:08,053 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 12:06:08,054 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 12:06:08,055 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 12:06:08,056 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 12:06:08,056 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 12:06:08,057 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-07 12:06:08,060 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 12:06:08,079 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 12:06:08,079 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 12:06:08,080 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 12:06:08,080 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 12:06:08,080 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 12:06:08,081 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 12:06:08,081 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 12:06:08,081 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 12:06:08,081 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 12:06:08,081 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 12:06:08,082 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 12:06:08,082 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 12:06:08,082 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 12:06:08,083 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 12:06:08,083 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 12:06:08,083 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 12:06:08,083 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 12:06:08,083 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 12:06:08,084 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 12:06:08,084 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 12:06:08,084 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 12:06:08,084 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 12:06:08,084 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 12:06:08,085 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 12:06:08,085 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 12:06:08,085 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 12:06:08,085 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 12:06:08,085 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 12:06:08,086 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 12:06:08,086 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 12:06:08,086 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 12:06:08,086 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 12:06:08,086 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 12:06:08,087 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 12:06:08,139 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 12:06:08,152 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 12:06:08,156 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 12:06:08,158 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 12:06:08,158 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 12:06:08,159 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label52_false-unreach-call_false-termination.c [2018-11-07 12:06:08,224 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/868f445ef/3d5386258a4341368c183e9db200334a/FLAGe3fc1c8e8 [2018-11-07 12:06:08,957 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 12:06:08,958 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label52_false-unreach-call_false-termination.c [2018-11-07 12:06:08,988 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/868f445ef/3d5386258a4341368c183e9db200334a/FLAGe3fc1c8e8 [2018-11-07 12:06:09,006 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/868f445ef/3d5386258a4341368c183e9db200334a [2018-11-07 12:06:09,018 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 12:06:09,019 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 12:06:09,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 12:06:09,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 12:06:09,025 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 12:06:09,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:06:09" (1/1) ... [2018-11-07 12:06:09,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63590d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:06:09, skipping insertion in model container [2018-11-07 12:06:09,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:06:09" (1/1) ... [2018-11-07 12:06:09,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 12:06:09,105 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 12:06:09,667 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 12:06:09,673 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 12:06:09,874 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 12:06:09,893 INFO L193 MainTranslator]: Completed translation [2018-11-07 12:06:09,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:06:09 WrapperNode [2018-11-07 12:06:09,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 12:06:09,895 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 12:06:09,895 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 12:06:09,895 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 12:06:09,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:06:09" (1/1) ... [2018-11-07 12:06:10,063 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:06:09" (1/1) ... [2018-11-07 12:06:10,080 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 12:06:10,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 12:06:10,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 12:06:10,081 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 12:06:10,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:06:09" (1/1) ... [2018-11-07 12:06:10,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:06:09" (1/1) ... [2018-11-07 12:06:10,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:06:09" (1/1) ... [2018-11-07 12:06:10,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:06:09" (1/1) ... [2018-11-07 12:06:10,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:06:09" (1/1) ... [2018-11-07 12:06:10,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:06:09" (1/1) ... [2018-11-07 12:06:10,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:06:09" (1/1) ... [2018-11-07 12:06:10,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 12:06:10,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 12:06:10,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 12:06:10,206 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 12:06:10,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:06:09" (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 12:06:10,290 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 12:06:10,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 12:06:10,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 12:06:10,291 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 12:06:10,291 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 12:06:10,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 12:06:10,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 12:06:10,292 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 12:06:10,292 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 12:06:14,258 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 12:06:14,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:06:14 BoogieIcfgContainer [2018-11-07 12:06:14,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 12:06:14,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 12:06:14,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 12:06:14,264 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 12:06:14,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:06:09" (1/3) ... [2018-11-07 12:06:14,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@417ec5d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:06:14, skipping insertion in model container [2018-11-07 12:06:14,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:06:09" (2/3) ... [2018-11-07 12:06:14,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@417ec5d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:06:14, skipping insertion in model container [2018-11-07 12:06:14,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:06:14" (3/3) ... [2018-11-07 12:06:14,269 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label52_false-unreach-call_false-termination.c [2018-11-07 12:06:14,278 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 12:06:14,287 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 12:06:14,303 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 12:06:14,342 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 12:06:14,342 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 12:06:14,343 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 12:06:14,343 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 12:06:14,343 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 12:06:14,343 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 12:06:14,343 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 12:06:14,343 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 12:06:14,370 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-07 12:06:14,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-07 12:06:14,378 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:06:14,379 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] [2018-11-07 12:06:14,382 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:06:14,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:06:14,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1208637865, now seen corresponding path program 1 times [2018-11-07 12:06:14,392 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:06:14,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:06:14,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:06:14,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:06:14,441 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:06:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:06:14,793 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 12:06:14,795 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:06:14,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 12:06:14,796 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:06:14,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 12:06:14,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 12:06:14,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 12:06:14,823 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-11-07 12:06:16,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:06:16,946 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-11-07 12:06:16,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 12:06:16,949 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2018-11-07 12:06:16,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:06:16,970 INFO L225 Difference]: With dead ends: 691 [2018-11-07 12:06:16,971 INFO L226 Difference]: Without dead ends: 434 [2018-11-07 12:06:16,980 INFO L604 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 [2018-11-07 12:06:17,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-11-07 12:06:17,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-11-07 12:06:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-11-07 12:06:17,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-11-07 12:06:17,072 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 29 [2018-11-07 12:06:17,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:06:17,073 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-11-07 12:06:17,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 12:06:17,074 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-11-07 12:06:17,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-11-07 12:06:17,081 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:06:17,081 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:06:17,081 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:06:17,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:06:17,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1035560415, now seen corresponding path program 1 times [2018-11-07 12:06:17,082 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:06:17,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:06:17,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:06:17,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:06:17,086 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:06:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:06:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 12:06:17,479 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:06:17,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 12:06:17,479 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:06:17,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 12:06:17,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 12:06:17,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 12:06:17,483 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-11-07 12:06:19,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:06:19,737 INFO L93 Difference]: Finished difference Result 1062 states and 1897 transitions. [2018-11-07 12:06:19,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 12:06:19,739 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2018-11-07 12:06:19,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:06:19,746 INFO L225 Difference]: With dead ends: 1062 [2018-11-07 12:06:19,746 INFO L226 Difference]: Without dead ends: 634 [2018-11-07 12:06:19,749 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 12:06:19,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2018-11-07 12:06:19,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 625. [2018-11-07 12:06:19,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2018-11-07 12:06:19,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1019 transitions. [2018-11-07 12:06:19,792 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1019 transitions. Word has length 116 [2018-11-07 12:06:19,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:06:19,793 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1019 transitions. [2018-11-07 12:06:19,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 12:06:19,794 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1019 transitions. [2018-11-07 12:06:19,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-07 12:06:19,798 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:06:19,799 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:06:19,799 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:06:19,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:06:19,800 INFO L82 PathProgramCache]: Analyzing trace with hash -2098713064, now seen corresponding path program 1 times [2018-11-07 12:06:19,800 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:06:19,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:06:19,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:06:19,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:06:19,802 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:06:19,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:06:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 12:06:19,983 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:06:19,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 12:06:19,983 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:06:19,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 12:06:19,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 12:06:19,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 12:06:19,985 INFO L87 Difference]: Start difference. First operand 625 states and 1019 transitions. Second operand 4 states. [2018-11-07 12:06:23,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:06:23,808 INFO L93 Difference]: Finished difference Result 2352 states and 4016 transitions. [2018-11-07 12:06:23,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 12:06:23,808 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2018-11-07 12:06:23,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:06:23,822 INFO L225 Difference]: With dead ends: 2352 [2018-11-07 12:06:23,822 INFO L226 Difference]: Without dead ends: 1733 [2018-11-07 12:06:23,829 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 12:06:23,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2018-11-07 12:06:23,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1733. [2018-11-07 12:06:23,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1733 states. [2018-11-07 12:06:23,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 2647 transitions. [2018-11-07 12:06:23,890 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 2647 transitions. Word has length 125 [2018-11-07 12:06:23,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:06:23,891 INFO L480 AbstractCegarLoop]: Abstraction has 1733 states and 2647 transitions. [2018-11-07 12:06:23,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 12:06:23,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 2647 transitions. [2018-11-07 12:06:23,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-11-07 12:06:23,906 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:06:23,907 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 12:06:23,907 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:06:23,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:06:23,907 INFO L82 PathProgramCache]: Analyzing trace with hash -839398590, now seen corresponding path program 1 times [2018-11-07 12:06:23,908 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:06:23,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:06:23,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:06:23,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:06:23,909 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:06:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:06:24,477 WARN L179 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-11-07 12:06:24,835 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 12:06:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 44 proven. 107 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 12:06:24,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 12:06:24,995 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 12:06:24,996 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 255 with the following transitions: [2018-11-07 12:06:24,998 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [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], [643], [647], [651], [655], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 12:06:25,045 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 12:06:25,046 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 12:06:25,931 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 12:06:35,817 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 12:06:35,819 INFO L272 AbstractInterpreter]: Visited 118 different actions 118 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 12:06:35,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:06:35,860 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 12:06:46,530 INFO L227 lantSequenceWeakener]: Weakened 245 states. On average, predicates are now at 77.46% of their original sizes. [2018-11-07 12:06:46,530 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 12:06:46,908 INFO L415 sIntCurrentIteration]: We unified 253 AI predicates to 253 [2018-11-07 12:06:46,908 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 12:06:46,909 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 12:06:46,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2018-11-07 12:06:46,910 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:06:46,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 12:06:46,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 12:06:46,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 12:06:46,911 INFO L87 Difference]: Start difference. First operand 1733 states and 2647 transitions. Second operand 7 states. [2018-11-07 12:07:56,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:07:56,575 INFO L93 Difference]: Finished difference Result 3645 states and 5568 transitions. [2018-11-07 12:07:56,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 12:07:56,576 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 254 [2018-11-07 12:07:56,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:07:56,588 INFO L225 Difference]: With dead ends: 3645 [2018-11-07 12:07:56,589 INFO L226 Difference]: Without dead ends: 1918 [2018-11-07 12:07:56,597 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 254 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-07 12:07:56,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2018-11-07 12:07:56,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1916. [2018-11-07 12:07:56,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1916 states. [2018-11-07 12:07:56,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2838 transitions. [2018-11-07 12:07:56,654 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2838 transitions. Word has length 254 [2018-11-07 12:07:56,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:07:56,655 INFO L480 AbstractCegarLoop]: Abstraction has 1916 states and 2838 transitions. [2018-11-07 12:07:56,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 12:07:56,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2838 transitions. [2018-11-07 12:07:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-11-07 12:07:56,664 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:07:56,664 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 12:07:56,665 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:07:56,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:07:56,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1746897264, now seen corresponding path program 1 times [2018-11-07 12:07:56,665 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:07:56,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:07:56,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:07:56,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:07:56,667 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:07:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:07:57,171 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 12:07:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 154 proven. 189 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 12:07:57,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 12:07:57,893 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 12:07:57,894 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 340 with the following transitions: [2018-11-07 12:07:57,894 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [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], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 12:07:57,900 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 12:07:57,900 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 12:07:58,253 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 12:08:23,939 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 12:08:23,940 INFO L272 AbstractInterpreter]: Visited 122 different actions 240 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 12:08:23,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:08:23,948 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 12:08:41,666 INFO L227 lantSequenceWeakener]: Weakened 120 states. On average, predicates are now at 78.01% of their original sizes. [2018-11-07 12:08:41,667 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 12:08:43,420 INFO L415 sIntCurrentIteration]: We unified 338 AI predicates to 338 [2018-11-07 12:08:43,421 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 12:08:43,421 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 12:08:43,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [12] total 33 [2018-11-07 12:08:43,422 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:08:43,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-07 12:08:43,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-07 12:08:43,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2018-11-07 12:08:43,424 INFO L87 Difference]: Start difference. First operand 1916 states and 2838 transitions. Second operand 23 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown