java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label50_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 15:46:23,169 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 15:46:23,171 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 15:46:23,183 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 15:46:23,183 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 15:46:23,185 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 15:46:23,188 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 15:46:23,190 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 15:46:23,192 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 15:46:23,193 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 15:46:23,194 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 15:46:23,194 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 15:46:23,195 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 15:46:23,196 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 15:46:23,197 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 15:46:23,197 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 15:46:23,198 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 15:46:23,200 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 15:46:23,202 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 15:46:23,204 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 15:46:23,205 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 15:46:23,206 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 15:46:23,208 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-11-07 15:46:23,221 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 15:46:23,221 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 15:46:23,222 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 15:46:23,225 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 15:46:23,226 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-11-07 15:46:23,257 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 15:46:23,257 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 15:46:23,258 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 15:46:23,258 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 15:46:23,258 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 15:46:23,259 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 15:46:23,259 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 15:46:23,259 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 15:46:23,259 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 15:46:23,259 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 15:46:23,259 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 15:46:23,260 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 15:46:23,260 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 15:46:23,261 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 15:46:23,261 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 15:46:23,261 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 15:46:23,261 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 15:46:23,261 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 15:46:23,261 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 15:46:23,262 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 15:46:23,262 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 15:46:23,262 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 15:46:23,262 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 15:46:23,262 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 15:46:23,263 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 15:46:23,263 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 15:46:23,263 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 15:46:23,263 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 15:46:23,263 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 15:46:23,264 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 15:46:23,264 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 15:46:23,264 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 15:46:23,264 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 15:46:23,264 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 15:46:23,309 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 15:46:23,324 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 15:46:23,329 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 15:46:23,330 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 15:46:23,330 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 15:46:23,331 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label50_true-unreach-call.c [2018-11-07 15:46:23,399 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6903c788e/62c073a2735b4acebb9b2e454b0d00ab/FLAG547bbfb75 [2018-11-07 15:46:24,129 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 15:46:24,130 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label50_true-unreach-call.c [2018-11-07 15:46:24,159 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6903c788e/62c073a2735b4acebb9b2e454b0d00ab/FLAG547bbfb75 [2018-11-07 15:46:24,176 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6903c788e/62c073a2735b4acebb9b2e454b0d00ab [2018-11-07 15:46:24,188 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 15:46:24,190 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 15:46:24,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 15:46:24,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 15:46:24,196 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 15:46:24,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:46:24" (1/1) ... [2018-11-07 15:46:24,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ac76325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:24, skipping insertion in model container [2018-11-07 15:46:24,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:46:24" (1/1) ... [2018-11-07 15:46:24,211 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 15:46:24,348 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 15:46:25,514 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:46:25,520 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 15:46:25,994 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:46:26,026 INFO L193 MainTranslator]: Completed translation [2018-11-07 15:46:26,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:26 WrapperNode [2018-11-07 15:46:26,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 15:46:26,028 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 15:46:26,028 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 15:46:26,028 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 15:46:26,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:26" (1/1) ... [2018-11-07 15:46:26,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:26" (1/1) ... [2018-11-07 15:46:26,348 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 15:46:26,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 15:46:26,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 15:46:26,349 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 15:46:26,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:26" (1/1) ... [2018-11-07 15:46:26,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:26" (1/1) ... [2018-11-07 15:46:26,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:26" (1/1) ... [2018-11-07 15:46:26,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:26" (1/1) ... [2018-11-07 15:46:26,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:26" (1/1) ... [2018-11-07 15:46:26,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:26" (1/1) ... [2018-11-07 15:46:26,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:26" (1/1) ... [2018-11-07 15:46:26,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 15:46:26,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 15:46:26,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 15:46:26,587 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 15:46:26,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 15:46:26,654 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 15:46:26,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 15:46:26,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 15:46:26,655 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-11-07 15:46:26,655 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-11-07 15:46:26,655 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 15:46:26,655 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 15:46:26,655 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 15:46:26,656 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 15:46:26,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 15:46:26,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 15:46:26,656 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 15:46:26,656 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 15:46:34,608 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 15:46:34,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:46:34 BoogieIcfgContainer [2018-11-07 15:46:34,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 15:46:34,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 15:46:34,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 15:46:34,614 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 15:46:34,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:46:24" (1/3) ... [2018-11-07 15:46:34,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422ef1a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:46:34, skipping insertion in model container [2018-11-07 15:46:34,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:46:26" (2/3) ... [2018-11-07 15:46:34,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422ef1a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:46:34, skipping insertion in model container [2018-11-07 15:46:34,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:46:34" (3/3) ... [2018-11-07 15:46:34,618 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label50_true-unreach-call.c [2018-11-07 15:46:34,629 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 15:46:34,638 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 15:46:34,655 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 15:46:34,700 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 15:46:34,700 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 15:46:34,700 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 15:46:34,701 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 15:46:34,701 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 15:46:34,701 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 15:46:34,701 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 15:46:34,701 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 15:46:34,739 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states. [2018-11-07 15:46:34,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-11-07 15:46:34,750 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:46:34,752 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:46:34,754 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:46:34,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:46:34,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1313897628, now seen corresponding path program 1 times [2018-11-07 15:46:34,763 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:46:34,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:46:34,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:46:34,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:46:34,816 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:46:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:46:35,235 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:46:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:46:35,383 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:46:35,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 15:46:35,384 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:46:35,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 15:46:35,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 15:46:35,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 15:46:35,413 INFO L87 Difference]: Start difference. First operand 775 states. Second operand 3 states. [2018-11-07 15:46:41,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:46:41,346 INFO L93 Difference]: Finished difference Result 2251 states and 4322 transitions. [2018-11-07 15:46:41,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 15:46:41,349 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2018-11-07 15:46:41,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:46:41,380 INFO L225 Difference]: With dead ends: 2251 [2018-11-07 15:46:41,380 INFO L226 Difference]: Without dead ends: 1474 [2018-11-07 15:46:41,391 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 15:46:41,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2018-11-07 15:46:41,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1474. [2018-11-07 15:46:41,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1474 states. [2018-11-07 15:46:41,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2721 transitions. [2018-11-07 15:46:41,531 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2721 transitions. Word has length 70 [2018-11-07 15:46:41,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:46:41,532 INFO L480 AbstractCegarLoop]: Abstraction has 1474 states and 2721 transitions. [2018-11-07 15:46:41,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 15:46:41,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2721 transitions. [2018-11-07 15:46:41,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-11-07 15:46:41,543 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:46:41,544 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 15:46:41,544 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:46:41,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:46:41,544 INFO L82 PathProgramCache]: Analyzing trace with hash -574735317, now seen corresponding path program 1 times [2018-11-07 15:46:41,545 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:46:41,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:46:41,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:46:41,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:46:41,546 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:46:41,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:46:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:46:41,953 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:46:41,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:46:41,954 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:46:41,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:46:41,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:46:41,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:46:41,956 INFO L87 Difference]: Start difference. First operand 1474 states and 2721 transitions. Second operand 6 states. [2018-11-07 15:46:50,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:46:50,352 INFO L93 Difference]: Finished difference Result 4419 states and 8244 transitions. [2018-11-07 15:46:50,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:46:50,352 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 159 [2018-11-07 15:46:50,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:46:50,375 INFO L225 Difference]: With dead ends: 4419 [2018-11-07 15:46:50,375 INFO L226 Difference]: Without dead ends: 2951 [2018-11-07 15:46:50,381 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:46:50,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2018-11-07 15:46:50,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2928. [2018-11-07 15:46:50,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2928 states. [2018-11-07 15:46:50,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 5087 transitions. [2018-11-07 15:46:50,469 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 5087 transitions. Word has length 159 [2018-11-07 15:46:50,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:46:50,470 INFO L480 AbstractCegarLoop]: Abstraction has 2928 states and 5087 transitions. [2018-11-07 15:46:50,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:46:50,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 5087 transitions. [2018-11-07 15:46:50,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-11-07 15:46:50,476 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:46:50,477 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 15:46:50,477 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:46:50,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:46:50,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1205378606, now seen corresponding path program 1 times [2018-11-07 15:46:50,478 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:46:50,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:46:50,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:46:50,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:46:50,479 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:46:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:46:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:46:50,754 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:46:50,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:46:50,755 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:46:50,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:46:50,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:46:50,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:46:50,756 INFO L87 Difference]: Start difference. First operand 2928 states and 5087 transitions. Second operand 6 states. [2018-11-07 15:46:56,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:46:56,215 INFO L93 Difference]: Finished difference Result 6669 states and 11522 transitions. [2018-11-07 15:46:56,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:46:56,218 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 206 [2018-11-07 15:46:56,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:46:56,241 INFO L225 Difference]: With dead ends: 6669 [2018-11-07 15:46:56,241 INFO L226 Difference]: Without dead ends: 3747 [2018-11-07 15:46:56,250 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:46:56,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3747 states. [2018-11-07 15:46:56,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3747 to 3689. [2018-11-07 15:46:56,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3689 states. [2018-11-07 15:46:56,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3689 states to 3689 states and 5891 transitions. [2018-11-07 15:46:56,350 INFO L78 Accepts]: Start accepts. Automaton has 3689 states and 5891 transitions. Word has length 206 [2018-11-07 15:46:56,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:46:56,350 INFO L480 AbstractCegarLoop]: Abstraction has 3689 states and 5891 transitions. [2018-11-07 15:46:56,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:46:56,351 INFO L276 IsEmpty]: Start isEmpty. Operand 3689 states and 5891 transitions. [2018-11-07 15:46:56,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-11-07 15:46:56,355 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:46:56,355 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 15:46:56,356 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:46:56,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:46:56,356 INFO L82 PathProgramCache]: Analyzing trace with hash 393503562, now seen corresponding path program 1 times [2018-11-07 15:46:56,356 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:46:56,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:46:56,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:46:56,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:46:56,358 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:46:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:46:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:46:56,602 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:46:56,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:46:56,602 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:46:56,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:46:56,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:46:56,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:46:56,604 INFO L87 Difference]: Start difference. First operand 3689 states and 5891 transitions. Second operand 6 states. [2018-11-07 15:47:01,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:47:01,608 INFO L93 Difference]: Finished difference Result 9623 states and 15373 transitions. [2018-11-07 15:47:01,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:47:01,610 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 208 [2018-11-07 15:47:01,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:47:01,646 INFO L225 Difference]: With dead ends: 9623 [2018-11-07 15:47:01,647 INFO L226 Difference]: Without dead ends: 5940 [2018-11-07 15:47:01,659 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:47:01,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5940 states. [2018-11-07 15:47:01,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5940 to 5889. [2018-11-07 15:47:01,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5889 states. [2018-11-07 15:47:01,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5889 states to 5889 states and 8064 transitions. [2018-11-07 15:47:01,806 INFO L78 Accepts]: Start accepts. Automaton has 5889 states and 8064 transitions. Word has length 208 [2018-11-07 15:47:01,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:47:01,807 INFO L480 AbstractCegarLoop]: Abstraction has 5889 states and 8064 transitions. [2018-11-07 15:47:01,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:47:01,807 INFO L276 IsEmpty]: Start isEmpty. Operand 5889 states and 8064 transitions. [2018-11-07 15:47:01,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-11-07 15:47:01,813 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:47:01,813 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:47:01,813 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:47:01,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:47:01,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1692616840, now seen corresponding path program 1 times [2018-11-07 15:47:01,814 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:47:01,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:47:01,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:47:01,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:47:01,815 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:47:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:47:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-11-07 15:47:02,028 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:47:02,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 15:47:02,028 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:47:02,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 15:47:02,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 15:47:02,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:47:02,030 INFO L87 Difference]: Start difference. First operand 5889 states and 8064 transitions. Second operand 4 states. [2018-11-07 15:47:09,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:47:09,789 INFO L93 Difference]: Finished difference Result 22501 states and 31632 transitions. [2018-11-07 15:47:09,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 15:47:09,790 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 266 [2018-11-07 15:47:09,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:47:09,868 INFO L225 Difference]: With dead ends: 22501 [2018-11-07 15:47:09,869 INFO L226 Difference]: Without dead ends: 16618 [2018-11-07 15:47:09,900 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 15:47:09,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16618 states. [2018-11-07 15:47:10,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16618 to 16618. [2018-11-07 15:47:10,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16618 states. [2018-11-07 15:47:10,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16618 states to 16618 states and 21854 transitions. [2018-11-07 15:47:10,297 INFO L78 Accepts]: Start accepts. Automaton has 16618 states and 21854 transitions. Word has length 266 [2018-11-07 15:47:10,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:47:10,298 INFO L480 AbstractCegarLoop]: Abstraction has 16618 states and 21854 transitions. [2018-11-07 15:47:10,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 15:47:10,298 INFO L276 IsEmpty]: Start isEmpty. Operand 16618 states and 21854 transitions. [2018-11-07 15:47:10,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-11-07 15:47:10,316 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:47:10,317 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:47:10,317 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:47:10,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:47:10,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1237035280, now seen corresponding path program 1 times [2018-11-07 15:47:10,318 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:47:10,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:47:10,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:47:10,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:47:10,319 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:47:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:47:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 167 proven. 61 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 15:47:10,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:47:10,796 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 15:47:10,798 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 311 with the following transitions: [2018-11-07 15:47:10,810 INFO L202 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1703], [1711], [1719], [1727], [1735], [1743], [1751], [1759], [1767], [1775], [1783], [1791], [1799], [1807], [1815], [1823], [1831], [1839], [1847], [1855], [1863], [1871], [1879], [1887], [1895], [1903], [1911], [1919], [1927], [1935], [1943], [1951], [1959], [1967], [1975], [1983], [1991], [1999], [2007], [2015], [2023], [2031], [2039], [2047], [2055], [2063], [2071], [2079], [2083], [2085], [2088], [2096], [2104], [2112], [2117], [2121], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2201], [2205], [2209], [2213], [2217], [2221], [2225], [2229], [2233], [2237], [2241], [2245], [2249], [2253], [2257], [2261], [2264], [2265], [2269], [2273], [2277], [2281], [2285], [2289], [2293], [2297], [2301], [2305], [2309], [2313], [2317], [2321], [2325], [2329], [2333], [2337], [2341], [2345], [2349], [2353], [2357], [2361], [2365], [2368], [2996], [3000], [3004], [3010], [3014], [3016], [3025], [3026], [3027], [3029], [3030] [2018-11-07 15:47:10,885 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 15:47:10,885 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 15:47:11,632 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 15:47:11,635 INFO L272 AbstractInterpreter]: Visited 138 different actions 138 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 15:47:11,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:47:11,688 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 15:47:12,420 INFO L227 lantSequenceWeakener]: Weakened 301 states. On average, predicates are now at 78.05% of their original sizes. [2018-11-07 15:47:12,420 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 15:47:12,776 INFO L415 sIntCurrentIteration]: We unified 309 AI predicates to 309 [2018-11-07 15:47:12,776 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 15:47:12,777 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 15:47:12,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2018-11-07 15:47:12,778 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:47:12,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 15:47:12,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 15:47:12,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 15:47:12,779 INFO L87 Difference]: Start difference. First operand 16618 states and 21854 transitions. Second operand 7 states. [2018-11-07 15:47:20,443 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown