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_label28_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 12:02:24,422 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 12:02:24,425 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 12:02:24,442 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 12:02:24,443 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 12:02:24,444 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 12:02:24,445 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 12:02:24,447 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 12:02:24,449 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 12:02:24,450 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 12:02:24,451 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 12:02:24,451 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 12:02:24,452 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 12:02:24,453 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 12:02:24,454 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 12:02:24,455 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 12:02:24,456 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 12:02:24,458 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 12:02:24,460 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 12:02:24,461 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 12:02:24,463 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 12:02:24,464 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 12:02:24,467 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 12:02:24,467 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 12:02:24,467 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 12:02:24,468 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 12:02:24,469 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 12:02:24,470 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 12:02:24,471 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 12:02:24,472 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 12:02:24,472 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 12:02:24,473 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 12:02:24,473 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 12:02:24,474 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 12:02:24,475 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 12:02:24,476 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 12:02:24,476 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 12:02:24,504 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 12:02:24,504 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 12:02:24,505 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 12:02:24,505 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 12:02:24,506 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 12:02:24,506 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 12:02:24,506 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 12:02:24,506 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 12:02:24,506 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 12:02:24,507 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 12:02:24,507 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 12:02:24,508 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 12:02:24,509 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 12:02:24,510 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 12:02:24,510 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 12:02:24,510 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 12:02:24,510 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 12:02:24,510 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 12:02:24,511 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 12:02:24,511 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 12:02:24,511 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 12:02:24,511 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 12:02:24,511 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 12:02:24,513 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 12:02:24,513 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 12:02:24,513 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 12:02:24,513 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 12:02:24,514 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 12:02:24,514 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 12:02:24,514 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 12:02:24,514 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 12:02:24,514 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 12:02:24,515 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 12:02:24,516 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 12:02:24,585 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 12:02:24,605 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 12:02:24,610 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 12:02:24,612 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 12:02:24,612 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 12:02:24,613 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label28_false-unreach-call_false-termination.c [2018-11-07 12:02:24,681 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cd69ba88/2b0878efb523468ba22f6bbd134134a6/FLAG5c344dfd6 [2018-11-07 12:02:25,251 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 12:02:25,252 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label28_false-unreach-call_false-termination.c [2018-11-07 12:02:25,273 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cd69ba88/2b0878efb523468ba22f6bbd134134a6/FLAG5c344dfd6 [2018-11-07 12:02:25,295 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cd69ba88/2b0878efb523468ba22f6bbd134134a6 [2018-11-07 12:02:25,309 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 12:02:25,312 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 12:02:25,313 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 12:02:25,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 12:02:25,321 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 12:02:25,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:02:25" (1/1) ... [2018-11-07 12:02:25,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@edc0f83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:25, skipping insertion in model container [2018-11-07 12:02:25,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:02:25" (1/1) ... [2018-11-07 12:02:25,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 12:02:25,430 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 12:02:26,024 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 12:02:26,030 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 12:02:26,242 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 12:02:26,273 INFO L193 MainTranslator]: Completed translation [2018-11-07 12:02:26,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:26 WrapperNode [2018-11-07 12:02:26,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 12:02:26,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 12:02:26,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 12:02:26,283 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 12:02:26,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:26" (1/1) ... [2018-11-07 12:02:26,328 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:26" (1/1) ... [2018-11-07 12:02:26,453 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 12:02:26,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 12:02:26,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 12:02:26,454 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 12:02:26,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:26" (1/1) ... [2018-11-07 12:02:26,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:26" (1/1) ... [2018-11-07 12:02:26,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:26" (1/1) ... [2018-11-07 12:02:26,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:26" (1/1) ... [2018-11-07 12:02:26,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:26" (1/1) ... [2018-11-07 12:02:26,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:26" (1/1) ... [2018-11-07 12:02:26,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:26" (1/1) ... [2018-11-07 12:02:26,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 12:02:26,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 12:02:26,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 12:02:26,592 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 12:02:26,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:26" (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 12:02:26,652 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 12:02:26,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 12:02:26,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 12:02:26,652 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 12:02:26,653 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 12:02:26,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 12:02:26,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 12:02:26,653 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 12:02:26,653 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 12:02:30,369 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 12:02:30,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:02:30 BoogieIcfgContainer [2018-11-07 12:02:30,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 12:02:30,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 12:02:30,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 12:02:30,376 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 12:02:30,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:02:25" (1/3) ... [2018-11-07 12:02:30,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1057d8a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:02:30, skipping insertion in model container [2018-11-07 12:02:30,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:26" (2/3) ... [2018-11-07 12:02:30,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1057d8a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:02:30, skipping insertion in model container [2018-11-07 12:02:30,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:02:30" (3/3) ... [2018-11-07 12:02:30,380 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label28_false-unreach-call_false-termination.c [2018-11-07 12:02:30,390 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 12:02:30,400 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 12:02:30,415 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 12:02:30,466 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 12:02:30,466 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 12:02:30,467 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 12:02:30,467 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 12:02:30,467 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 12:02:30,467 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 12:02:30,467 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 12:02:30,467 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 12:02:30,493 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-07 12:02:30,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-07 12:02:30,500 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:02:30,502 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 12:02:30,504 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:02:30,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:02:30,510 INFO L82 PathProgramCache]: Analyzing trace with hash 2018061625, now seen corresponding path program 1 times [2018-11-07 12:02:30,512 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:02:30,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:02:30,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:02:30,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:02:30,564 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:02:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:02:30,913 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 12:02:30,916 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:02:30,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 12:02:30,917 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:02:30,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 12:02:30,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 12:02:30,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 12:02:30,947 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 4 states. [2018-11-07 12:02:34,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:02:34,089 INFO L93 Difference]: Finished difference Result 894 states and 1610 transitions. [2018-11-07 12:02:34,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 12:02:34,093 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-11-07 12:02:34,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:02:34,115 INFO L225 Difference]: With dead ends: 894 [2018-11-07 12:02:34,116 INFO L226 Difference]: Without dead ends: 633 [2018-11-07 12:02:34,126 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 12:02:34,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2018-11-07 12:02:34,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 434. [2018-11-07 12:02:34,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-11-07 12:02:34,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 662 transitions. [2018-11-07 12:02:34,225 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 662 transitions. Word has length 17 [2018-11-07 12:02:34,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:02:34,226 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 662 transitions. [2018-11-07 12:02:34,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 12:02:34,226 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 662 transitions. [2018-11-07 12:02:34,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-11-07 12:02:34,232 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:02:34,233 INFO L375 BasicCegarLoop]: trace histogram [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 12:02:34,233 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:02:34,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:02:34,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1257410928, now seen corresponding path program 1 times [2018-11-07 12:02:34,234 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:02:34,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:02:34,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:02:34,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:02:34,236 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:02:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:02:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 12:02:34,827 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:02:34,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 12:02:34,828 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:02:34,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 12:02:34,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 12:02:34,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-07 12:02:34,831 INFO L87 Difference]: Start difference. First operand 434 states and 662 transitions. Second operand 6 states. [2018-11-07 12:02:40,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:02:40,079 INFO L93 Difference]: Finished difference Result 1421 states and 2196 transitions. [2018-11-07 12:02:40,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 12:02:40,080 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2018-11-07 12:02:40,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:02:40,089 INFO L225 Difference]: With dead ends: 1421 [2018-11-07 12:02:40,090 INFO L226 Difference]: Without dead ends: 993 [2018-11-07 12:02:40,095 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 12:02:40,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2018-11-07 12:02:40,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 940. [2018-11-07 12:02:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 940 states. [2018-11-07 12:02:40,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1360 transitions. [2018-11-07 12:02:40,167 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1360 transitions. Word has length 101 [2018-11-07 12:02:40,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:02:40,168 INFO L480 AbstractCegarLoop]: Abstraction has 940 states and 1360 transitions. [2018-11-07 12:02:40,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 12:02:40,168 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1360 transitions. [2018-11-07 12:02:40,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-07 12:02:40,172 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:02:40,172 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 12:02:40,173 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:02:40,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:02:40,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1352215460, now seen corresponding path program 1 times [2018-11-07 12:02:40,173 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:02:40,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:02:40,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:02:40,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:02:40,175 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:02:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:02:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 12:02:40,367 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:02:40,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 12:02:40,368 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:02:40,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 12:02:40,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 12:02:40,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 12:02:40,369 INFO L87 Difference]: Start difference. First operand 940 states and 1360 transitions. Second operand 3 states. [2018-11-07 12:02:42,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:02:42,267 INFO L93 Difference]: Finished difference Result 2567 states and 3827 transitions. [2018-11-07 12:02:42,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 12:02:42,276 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2018-11-07 12:02:42,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:02:42,290 INFO L225 Difference]: With dead ends: 2567 [2018-11-07 12:02:42,291 INFO L226 Difference]: Without dead ends: 1633 [2018-11-07 12:02:42,303 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 12:02:42,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2018-11-07 12:02:42,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1633. [2018-11-07 12:02:42,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1633 states. [2018-11-07 12:02:42,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1633 states to 1633 states and 2213 transitions. [2018-11-07 12:02:42,364 INFO L78 Accepts]: Start accepts. Automaton has 1633 states and 2213 transitions. Word has length 127 [2018-11-07 12:02:42,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:02:42,365 INFO L480 AbstractCegarLoop]: Abstraction has 1633 states and 2213 transitions. [2018-11-07 12:02:42,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 12:02:42,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1633 states and 2213 transitions. [2018-11-07 12:02:42,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-11-07 12:02:42,376 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:02:42,376 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 12:02:42,379 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:02:42,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:02:42,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1698418821, now seen corresponding path program 1 times [2018-11-07 12:02:42,379 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:02:42,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:02:42,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:02:42,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:02:42,381 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:02:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:02:42,693 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 12:02:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 12:02:42,965 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:02:42,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 12:02:42,966 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:02:42,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 12:02:42,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 12:02:42,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 12:02:42,967 INFO L87 Difference]: Start difference. First operand 1633 states and 2213 transitions. Second operand 6 states. [2018-11-07 12:02:44,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:02:44,724 INFO L93 Difference]: Finished difference Result 3851 states and 5415 transitions. [2018-11-07 12:02:44,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 12:02:44,724 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 158 [2018-11-07 12:02:44,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:02:44,742 INFO L225 Difference]: With dead ends: 3851 [2018-11-07 12:02:44,743 INFO L226 Difference]: Without dead ends: 2224 [2018-11-07 12:02:44,752 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 12:02:44,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2018-11-07 12:02:44,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 2202. [2018-11-07 12:02:44,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2202 states. [2018-11-07 12:02:44,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 2925 transitions. [2018-11-07 12:02:44,848 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 2925 transitions. Word has length 158 [2018-11-07 12:02:44,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:02:44,849 INFO L480 AbstractCegarLoop]: Abstraction has 2202 states and 2925 transitions. [2018-11-07 12:02:44,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 12:02:44,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 2925 transitions. [2018-11-07 12:02:44,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-11-07 12:02:44,854 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:02:44,854 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 12:02:44,854 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:02:44,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:02:44,857 INFO L82 PathProgramCache]: Analyzing trace with hash 723896290, now seen corresponding path program 1 times [2018-11-07 12:02:44,857 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:02:44,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:02:44,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:02:44,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:02:44,858 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:02:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:02:45,356 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 12:02:45,545 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 12:02:45,761 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 12:02:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 12:02:46,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 12:02:46,199 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 12:02:46,200 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 187 with the following transitions: [2018-11-07 12:02:46,202 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [37], [39], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [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], [550], [551], [554], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 12:02:46,251 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 12:02:46,251 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 12:02:47,093 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 12:02:47,095 INFO L272 AbstractInterpreter]: Visited 93 different actions 179 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 12:02:47,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:02:47,141 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 12:02:47,859 INFO L227 lantSequenceWeakener]: Weakened 63 states. On average, predicates are now at 77.81% of their original sizes. [2018-11-07 12:02:47,859 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 12:02:49,505 INFO L415 sIntCurrentIteration]: We unified 185 AI predicates to 185 [2018-11-07 12:02:49,505 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 12:02:49,507 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 12:02:49,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [28] imperfect sequences [12] total 38 [2018-11-07 12:02:49,507 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:02:49,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-07 12:02:49,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-07 12:02:49,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2018-11-07 12:02:49,510 INFO L87 Difference]: Start difference. First operand 2202 states and 2925 transitions. Second operand 28 states. [2018-11-07 12:03:03,936 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