java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label03_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-25 00:09:20,450 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-25 00:09:20,454 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-25 00:09:20,472 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-25 00:09:20,472 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-25 00:09:20,474 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-25 00:09:20,475 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-25 00:09:20,479 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-25 00:09:20,482 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-25 00:09:20,483 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-25 00:09:20,484 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-25 00:09:20,484 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-25 00:09:20,485 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-25 00:09:20,488 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-25 00:09:20,496 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-25 00:09:20,497 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-25 00:09:20,498 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-25 00:09:20,499 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-25 00:09:20,502 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-25 00:09:20,504 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-25 00:09:20,506 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-25 00:09:20,508 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-25 00:09:20,511 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-25 00:09:20,523 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-25 00:09:20,538 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-25 00:09:20,538 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-25 00:09:20,539 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-25 00:09:20,539 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-25 00:09:20,539 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-25 00:09:20,539 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-25 00:09:20,540 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-25 00:09:20,540 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-25 00:09:20,540 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-25 00:09:20,540 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-25 00:09:20,540 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-25 00:09:20,540 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-25 00:09:20,541 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-25 00:09:20,541 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-25 00:09:20,542 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-25 00:09:20,542 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-25 00:09:20,542 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-25 00:09:20,542 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-25 00:09:20,542 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-25 00:09:20,543 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-25 00:09:20,543 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-25 00:09:20,543 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-25 00:09:20,543 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-25 00:09:20,543 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-25 00:09:20,544 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-25 00:09:20,544 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-25 00:09:20,544 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-25 00:09:20,544 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-25 00:09:20,544 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-25 00:09:20,545 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-25 00:09:20,545 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-25 00:09:20,545 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-25 00:09:20,545 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-25 00:09:20,545 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-25 00:09:20,546 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-25 00:09:20,546 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-25 00:09:20,615 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-25 00:09:20,631 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-25 00:09:20,636 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-25 00:09:20,638 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-25 00:09:20,638 INFO L276 PluginConnector]: CDTParser initialized [2018-10-25 00:09:20,639 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label03_true-unreach-call.c [2018-10-25 00:09:20,714 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/09baeae60/f4b98c5fbf504250bfdd8d0d0a47c060/FLAG595acc3b2 [2018-10-25 00:09:21,328 INFO L298 CDTParser]: Found 1 translation units. [2018-10-25 00:09:21,329 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label03_true-unreach-call.c [2018-10-25 00:09:21,350 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/09baeae60/f4b98c5fbf504250bfdd8d0d0a47c060/FLAG595acc3b2 [2018-10-25 00:09:21,369 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/09baeae60/f4b98c5fbf504250bfdd8d0d0a47c060 [2018-10-25 00:09:21,379 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-25 00:09:21,381 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-25 00:09:21,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-25 00:09:21,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-25 00:09:21,387 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-25 00:09:21,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 12:09:21" (1/1) ... [2018-10-25 00:09:21,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e601c66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:09:21, skipping insertion in model container [2018-10-25 00:09:21,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 12:09:21" (1/1) ... [2018-10-25 00:09:21,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-25 00:09:21,510 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-25 00:09:22,223 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-25 00:09:22,229 INFO L189 MainTranslator]: Completed pre-run [2018-10-25 00:09:22,527 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-25 00:09:22,552 INFO L193 MainTranslator]: Completed translation [2018-10-25 00:09:22,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:09:22 WrapperNode [2018-10-25 00:09:22,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-25 00:09:22,554 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-25 00:09:22,554 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-25 00:09:22,555 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-25 00:09:22,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:09:22" (1/1) ... [2018-10-25 00:09:22,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:09:22" (1/1) ... [2018-10-25 00:09:22,867 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-25 00:09:22,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-25 00:09:22,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-25 00:09:22,868 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-25 00:09:22,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:09:22" (1/1) ... [2018-10-25 00:09:22,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:09:22" (1/1) ... [2018-10-25 00:09:22,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:09:22" (1/1) ... [2018-10-25 00:09:22,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:09:22" (1/1) ... [2018-10-25 00:09:22,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:09:22" (1/1) ... [2018-10-25 00:09:22,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:09:22" (1/1) ... [2018-10-25 00:09:22,991 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:09:22" (1/1) ... [2018-10-25 00:09:23,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-25 00:09:23,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-25 00:09:23,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-25 00:09:23,009 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-25 00:09:23,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:09:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-25 00:09:23,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-25 00:09:23,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-25 00:09:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-25 00:09:23,087 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-25 00:09:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-25 00:09:23,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-25 00:09:23,088 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-25 00:09:23,088 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-25 00:09:28,330 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-25 00:09:28,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 12:09:28 BoogieIcfgContainer [2018-10-25 00:09:28,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-25 00:09:28,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-25 00:09:28,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-25 00:09:28,336 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-25 00:09:28,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 12:09:21" (1/3) ... [2018-10-25 00:09:28,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40d17a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 12:09:28, skipping insertion in model container [2018-10-25 00:09:28,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:09:22" (2/3) ... [2018-10-25 00:09:28,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40d17a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 12:09:28, skipping insertion in model container [2018-10-25 00:09:28,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 12:09:28" (3/3) ... [2018-10-25 00:09:28,344 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label03_true-unreach-call.c [2018-10-25 00:09:28,357 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-25 00:09:28,367 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-25 00:09:28,387 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-25 00:09:28,429 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-25 00:09:28,430 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-25 00:09:28,430 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-25 00:09:28,430 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-25 00:09:28,430 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-25 00:09:28,431 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-25 00:09:28,431 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-25 00:09:28,431 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-25 00:09:28,464 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-10-25 00:09:28,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-25 00:09:28,482 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 00:09:28,484 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 00:09:28,486 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 00:09:28,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:09:28,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1304680716, now seen corresponding path program 1 times [2018-10-25 00:09:28,498 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 00:09:28,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:09:28,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:09:28,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:09:28,560 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 00:09:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:09:29,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 00:09:29,546 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 00:09:29,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-25 00:09:29,546 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 00:09:29,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-25 00:09:29,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-25 00:09:29,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-25 00:09:29,575 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-10-25 00:09:31,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 00:09:31,839 INFO L93 Difference]: Finished difference Result 845 states and 1487 transitions. [2018-10-25 00:09:31,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-25 00:09:31,843 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2018-10-25 00:09:31,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 00:09:31,867 INFO L225 Difference]: With dead ends: 845 [2018-10-25 00:09:31,868 INFO L226 Difference]: Without dead ends: 531 [2018-10-25 00:09:31,876 INFO L605 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 [2018-10-25 00:09:31,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-10-25 00:09:31,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 530. [2018-10-25 00:09:31,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 530 states. [2018-10-25 00:09:31,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 869 transitions. [2018-10-25 00:09:31,973 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 869 transitions. Word has length 171 [2018-10-25 00:09:31,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 00:09:31,975 INFO L481 AbstractCegarLoop]: Abstraction has 530 states and 869 transitions. [2018-10-25 00:09:31,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-25 00:09:31,975 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 869 transitions. [2018-10-25 00:09:31,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-25 00:09:31,982 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 00:09:31,982 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 00:09:31,983 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 00:09:31,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:09:31,983 INFO L82 PathProgramCache]: Analyzing trace with hash 211800901, now seen corresponding path program 1 times [2018-10-25 00:09:31,984 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 00:09:31,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:09:31,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:09:31,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:09:31,985 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 00:09:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:09:32,307 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 00:09:32,308 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 00:09:32,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-25 00:09:32,308 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 00:09:32,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-25 00:09:32,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-25 00:09:32,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-25 00:09:32,311 INFO L87 Difference]: Start difference. First operand 530 states and 869 transitions. Second operand 6 states. [2018-10-25 00:09:36,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 00:09:36,597 INFO L93 Difference]: Finished difference Result 1599 states and 2688 transitions. [2018-10-25 00:09:36,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-25 00:09:36,598 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 181 [2018-10-25 00:09:36,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 00:09:36,610 INFO L225 Difference]: With dead ends: 1599 [2018-10-25 00:09:36,611 INFO L226 Difference]: Without dead ends: 1075 [2018-10-25 00:09:36,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-25 00:09:36,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2018-10-25 00:09:36,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1034. [2018-10-25 00:09:36,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2018-10-25 00:09:36,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1689 transitions. [2018-10-25 00:09:36,689 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1689 transitions. Word has length 181 [2018-10-25 00:09:36,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 00:09:36,689 INFO L481 AbstractCegarLoop]: Abstraction has 1034 states and 1689 transitions. [2018-10-25 00:09:36,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-25 00:09:36,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1689 transitions. [2018-10-25 00:09:36,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-25 00:09:36,694 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 00:09:36,694 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 00:09:36,694 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 00:09:36,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:09:36,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1978156296, now seen corresponding path program 1 times [2018-10-25 00:09:36,695 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 00:09:36,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:09:36,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:09:36,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:09:36,696 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 00:09:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:09:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 00:09:37,055 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 00:09:37,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-25 00:09:37,055 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 00:09:37,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-25 00:09:37,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-25 00:09:37,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-25 00:09:37,058 INFO L87 Difference]: Start difference. First operand 1034 states and 1689 transitions. Second operand 3 states. [2018-10-25 00:09:39,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 00:09:39,723 INFO L93 Difference]: Finished difference Result 2915 states and 4931 transitions. [2018-10-25 00:09:39,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-25 00:09:39,724 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 184 [2018-10-25 00:09:39,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 00:09:39,736 INFO L225 Difference]: With dead ends: 2915 [2018-10-25 00:09:39,736 INFO L226 Difference]: Without dead ends: 1887 [2018-10-25 00:09:39,742 INFO L605 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 [2018-10-25 00:09:39,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2018-10-25 00:09:39,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1880. [2018-10-25 00:09:39,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1880 states. [2018-10-25 00:09:39,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 2986 transitions. [2018-10-25 00:09:39,800 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 2986 transitions. Word has length 184 [2018-10-25 00:09:39,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 00:09:39,801 INFO L481 AbstractCegarLoop]: Abstraction has 1880 states and 2986 transitions. [2018-10-25 00:09:39,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-25 00:09:39,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 2986 transitions. [2018-10-25 00:09:39,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-25 00:09:39,808 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 00:09:39,809 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 00:09:39,809 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 00:09:39,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:09:39,810 INFO L82 PathProgramCache]: Analyzing trace with hash 88085177, now seen corresponding path program 1 times [2018-10-25 00:09:39,810 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 00:09:39,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:09:39,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:09:39,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:09:39,811 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 00:09:39,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:09:40,057 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-25 00:09:40,203 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 00:09:40,203 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 00:09:40,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-25 00:09:40,203 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 00:09:40,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-25 00:09:40,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-25 00:09:40,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-25 00:09:40,205 INFO L87 Difference]: Start difference. First operand 1880 states and 2986 transitions. Second operand 6 states. [2018-10-25 00:09:42,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 00:09:42,457 INFO L93 Difference]: Finished difference Result 6020 states and 10195 transitions. [2018-10-25 00:09:42,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-25 00:09:42,457 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 191 [2018-10-25 00:09:42,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 00:09:42,490 INFO L225 Difference]: With dead ends: 6020 [2018-10-25 00:09:42,490 INFO L226 Difference]: Without dead ends: 4146 [2018-10-25 00:09:42,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-25 00:09:42,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4146 states. [2018-10-25 00:09:42,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4146 to 4038. [2018-10-25 00:09:42,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4038 states. [2018-10-25 00:09:42,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 6154 transitions. [2018-10-25 00:09:42,661 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 6154 transitions. Word has length 191 [2018-10-25 00:09:42,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 00:09:42,662 INFO L481 AbstractCegarLoop]: Abstraction has 4038 states and 6154 transitions. [2018-10-25 00:09:42,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-25 00:09:42,662 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 6154 transitions. [2018-10-25 00:09:42,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-25 00:09:42,676 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 00:09:42,676 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 00:09:42,676 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 00:09:42,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:09:42,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1314408798, now seen corresponding path program 1 times [2018-10-25 00:09:42,677 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 00:09:42,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:09:42,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:09:42,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:09:42,678 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 00:09:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:09:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 00:09:43,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 00:09:43,174 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 00:09:43,175 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 210 with the following transitions: [2018-10-25 00:09:43,183 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [28], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [68], [73], [75], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [829], [831], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-25 00:09:43,270 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 00:09:43,270 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 00:09:44,527 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-25 00:09:44,529 INFO L272 AbstractInterpreter]: Visited 172 different actions 172 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-10-25 00:09:44,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:09:44,572 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-25 00:09:45,657 INFO L232 lantSequenceWeakener]: Weakened 198 states. On average, predicates are now at 71.73% of their original sizes. [2018-10-25 00:09:45,657 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-25 00:09:46,177 INFO L413 sIntCurrentIteration]: We have 208 unified AI predicates [2018-10-25 00:09:46,177 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-25 00:09:46,178 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-25 00:09:46,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2018-10-25 00:09:46,179 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 00:09:46,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-25 00:09:46,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-25 00:09:46,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2018-10-25 00:09:46,181 INFO L87 Difference]: Start difference. First operand 4038 states and 6154 transitions. Second operand 12 states. [2018-10-25 00:10:00,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 00:10:00,488 INFO L93 Difference]: Finished difference Result 8280 states and 12606 transitions. [2018-10-25 00:10:00,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-25 00:10:00,488 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 209 [2018-10-25 00:10:00,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 00:10:00,508 INFO L225 Difference]: With dead ends: 8280 [2018-10-25 00:10:00,509 INFO L226 Difference]: Without dead ends: 4248 [2018-10-25 00:10:00,522 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 209 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2018-10-25 00:10:00,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4248 states. [2018-10-25 00:10:00,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4248 to 4246. [2018-10-25 00:10:00,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4246 states. [2018-10-25 00:10:00,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4246 states to 4246 states and 6370 transitions. [2018-10-25 00:10:00,634 INFO L78 Accepts]: Start accepts. Automaton has 4246 states and 6370 transitions. Word has length 209 [2018-10-25 00:10:00,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 00:10:00,635 INFO L481 AbstractCegarLoop]: Abstraction has 4246 states and 6370 transitions. [2018-10-25 00:10:00,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-25 00:10:00,635 INFO L276 IsEmpty]: Start isEmpty. Operand 4246 states and 6370 transitions. [2018-10-25 00:10:00,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-25 00:10:00,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 00:10:00,649 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 00:10:00,649 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 00:10:00,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:10:00,650 INFO L82 PathProgramCache]: Analyzing trace with hash -628104531, now seen corresponding path program 1 times [2018-10-25 00:10:00,650 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 00:10:00,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:10:00,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:10:00,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:10:00,651 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 00:10:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:10:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 00:10:00,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 00:10:00,878 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 00:10:00,878 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 219 with the following transitions: [2018-10-25 00:10:00,879 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [73], [75], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [829], [831], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-25 00:10:00,888 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 00:10:00,889 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 00:10:03,620 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 00:10:03,620 INFO L272 AbstractInterpreter]: Visited 176 different actions 344 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-25 00:10:03,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:10:03,667 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 00:10:03,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 00:10:03,668 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 00:10:03,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:10:03,679 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 00:10:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:10:03,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 00:10:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-25 00:10:04,181 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 00:10:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-25 00:10:04,396 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-25 00:10:04,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-10-25 00:10:04,396 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 00:10:04,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-25 00:10:04,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-25 00:10:04,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-25 00:10:04,398 INFO L87 Difference]: Start difference. First operand 4246 states and 6370 transitions. Second operand 3 states. [2018-10-25 00:10:07,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 00:10:07,113 INFO L93 Difference]: Finished difference Result 12102 states and 18948 transitions. [2018-10-25 00:10:07,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-25 00:10:07,113 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 218 [2018-10-25 00:10:07,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 00:10:07,159 INFO L225 Difference]: With dead ends: 12102 [2018-10-25 00:10:07,159 INFO L226 Difference]: Without dead ends: 8070 [2018-10-25 00:10:07,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 434 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-25 00:10:07,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8070 states. [2018-10-25 00:10:07,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8070 to 8032. [2018-10-25 00:10:07,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8032 states. [2018-10-25 00:10:07,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8032 states to 8032 states and 12234 transitions. [2018-10-25 00:10:07,409 INFO L78 Accepts]: Start accepts. Automaton has 8032 states and 12234 transitions. Word has length 218 [2018-10-25 00:10:07,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 00:10:07,411 INFO L481 AbstractCegarLoop]: Abstraction has 8032 states and 12234 transitions. [2018-10-25 00:10:07,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-25 00:10:07,411 INFO L276 IsEmpty]: Start isEmpty. Operand 8032 states and 12234 transitions. [2018-10-25 00:10:07,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-10-25 00:10:07,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 00:10:07,440 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 00:10:07,440 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 00:10:07,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:10:07,441 INFO L82 PathProgramCache]: Analyzing trace with hash 837304473, now seen corresponding path program 1 times [2018-10-25 00:10:07,441 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 00:10:07,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:10:07,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:10:07,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:10:07,443 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 00:10:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:10:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 67 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-25 00:10:07,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 00:10:07,704 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 00:10:07,704 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 238 with the following transitions: [2018-10-25 00:10:07,705 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [10], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [115], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [829], [831], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-25 00:10:07,714 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 00:10:07,714 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 00:10:10,492 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 00:10:10,492 INFO L272 AbstractInterpreter]: Visited 178 different actions 347 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-25 00:10:10,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:10:10,497 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 00:10:10,497 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 00:10:10,497 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 00:10:10,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:10:10,507 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 00:10:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:10:10,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 00:10:10,758 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-10-25 00:10:10,758 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 00:10:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-25 00:10:10,871 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-25 00:10:10,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 7 [2018-10-25 00:10:10,871 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 00:10:10,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-25 00:10:10,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-25 00:10:10,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-25 00:10:10,872 INFO L87 Difference]: Start difference. First operand 8032 states and 12234 transitions. Second operand 3 states. [2018-10-25 00:10:11,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 00:10:11,724 INFO L93 Difference]: Finished difference Result 15849 states and 24253 transitions. [2018-10-25 00:10:11,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-25 00:10:11,725 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 237 [2018-10-25 00:10:11,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 00:10:11,774 INFO L225 Difference]: With dead ends: 15849 [2018-10-25 00:10:11,775 INFO L226 Difference]: Without dead ends: 8031 [2018-10-25 00:10:11,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-25 00:10:11,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8031 states. [2018-10-25 00:10:12,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8031 to 8031. [2018-10-25 00:10:12,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8031 states. [2018-10-25 00:10:12,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8031 states to 8031 states and 12232 transitions. [2018-10-25 00:10:12,023 INFO L78 Accepts]: Start accepts. Automaton has 8031 states and 12232 transitions. Word has length 237 [2018-10-25 00:10:12,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 00:10:12,023 INFO L481 AbstractCegarLoop]: Abstraction has 8031 states and 12232 transitions. [2018-10-25 00:10:12,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-25 00:10:12,024 INFO L276 IsEmpty]: Start isEmpty. Operand 8031 states and 12232 transitions. [2018-10-25 00:10:12,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-10-25 00:10:12,054 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 00:10:12,054 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 00:10:12,054 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 00:10:12,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:10:12,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1948184938, now seen corresponding path program 1 times [2018-10-25 00:10:12,055 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 00:10:12,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:10:12,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:10:12,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:10:12,056 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 00:10:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:10:12,607 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 94 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-25 00:10:12,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 00:10:12,608 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 00:10:12,608 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 252 with the following transitions: [2018-10-25 00:10:12,609 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [73], [75], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [115], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [829], [831], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-25 00:10:12,617 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 00:10:12,617 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 00:10:14,657 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 00:10:14,658 INFO L272 AbstractInterpreter]: Visited 177 different actions 346 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-25 00:10:14,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:10:14,666 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 00:10:14,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 00:10:14,666 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 00:10:14,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:10:14,675 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 00:10:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:10:14,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 00:10:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-25 00:10:15,242 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 00:10:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-25 00:10:15,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-25 00:10:15,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-25 00:10:15,726 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-25 00:10:15,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-25 00:10:15,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-25 00:10:15,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-10-25 00:10:15,727 INFO L87 Difference]: Start difference. First operand 8031 states and 12232 transitions. Second operand 9 states. [2018-10-25 00:10:16,232 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-10-25 00:10:21,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 00:10:21,301 INFO L93 Difference]: Finished difference Result 31560 states and 52753 transitions. [2018-10-25 00:10:21,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-25 00:10:21,303 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 251 [2018-10-25 00:10:21,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 00:10:21,451 INFO L225 Difference]: With dead ends: 31560 [2018-10-25 00:10:21,451 INFO L226 Difference]: Without dead ends: 23743 [2018-10-25 00:10:21,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 502 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2018-10-25 00:10:21,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23743 states. [2018-10-25 00:10:22,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23743 to 23579. [2018-10-25 00:10:22,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23579 states. [2018-10-25 00:10:22,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23579 states to 23579 states and 36877 transitions. [2018-10-25 00:10:22,270 INFO L78 Accepts]: Start accepts. Automaton has 23579 states and 36877 transitions. Word has length 251 [2018-10-25 00:10:22,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 00:10:22,270 INFO L481 AbstractCegarLoop]: Abstraction has 23579 states and 36877 transitions. [2018-10-25 00:10:22,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-25 00:10:22,270 INFO L276 IsEmpty]: Start isEmpty. Operand 23579 states and 36877 transitions. [2018-10-25 00:10:22,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-10-25 00:10:22,366 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 00:10:22,366 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 00:10:22,366 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 00:10:22,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:10:22,367 INFO L82 PathProgramCache]: Analyzing trace with hash -368197559, now seen corresponding path program 1 times [2018-10-25 00:10:22,367 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 00:10:22,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:10:22,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:10:22,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:10:22,368 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 00:10:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:10:22,684 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-25 00:10:23,140 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 76 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-25 00:10:23,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 00:10:23,141 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 00:10:23,141 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 253 with the following transitions: [2018-10-25 00:10:23,142 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [280], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [829], [831], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-25 00:10:23,148 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 00:10:23,148 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 00:10:24,196 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-25 00:10:24,197 INFO L272 AbstractInterpreter]: Visited 175 different actions 344 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-25 00:10:24,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:10:24,205 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-25 00:10:26,043 INFO L232 lantSequenceWeakener]: Weakened 249 states. On average, predicates are now at 71.42% of their original sizes. [2018-10-25 00:10:26,043 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-25 00:10:26,373 INFO L413 sIntCurrentIteration]: We have 251 unified AI predicates [2018-10-25 00:10:26,373 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-25 00:10:26,373 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-25 00:10:26,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [6] total 22 [2018-10-25 00:10:26,374 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 00:10:26,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-25 00:10:26,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-25 00:10:26,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2018-10-25 00:10:26,375 INFO L87 Difference]: Start difference. First operand 23579 states and 36877 transitions. Second operand 18 states. [2018-10-25 00:11:18,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 00:11:18,733 INFO L93 Difference]: Finished difference Result 47158 states and 73843 transitions. [2018-10-25 00:11:18,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-25 00:11:18,733 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 252 [2018-10-25 00:11:18,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 00:11:18,831 INFO L225 Difference]: With dead ends: 47158 [2018-10-25 00:11:18,831 INFO L226 Difference]: Without dead ends: 23793 [2018-10-25 00:11:18,883 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 260 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2018-10-25 00:11:18,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23793 states. [2018-10-25 00:11:19,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23793 to 23790. [2018-10-25 00:11:19,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23790 states. [2018-10-25 00:11:19,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23790 states to 23790 states and 37100 transitions. [2018-10-25 00:11:19,466 INFO L78 Accepts]: Start accepts. Automaton has 23790 states and 37100 transitions. Word has length 252 [2018-10-25 00:11:19,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 00:11:19,467 INFO L481 AbstractCegarLoop]: Abstraction has 23790 states and 37100 transitions. [2018-10-25 00:11:19,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-25 00:11:19,467 INFO L276 IsEmpty]: Start isEmpty. Operand 23790 states and 37100 transitions. [2018-10-25 00:11:19,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-10-25 00:11:19,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 00:11:19,517 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 00:11:19,517 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 00:11:19,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:11:19,518 INFO L82 PathProgramCache]: Analyzing trace with hash 967375626, now seen corresponding path program 1 times [2018-10-25 00:11:19,518 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 00:11:19,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:11:19,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:11:19,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:11:19,519 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 00:11:19,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:11:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 89 proven. 14 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-10-25 00:11:19,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 00:11:19,851 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 00:11:19,851 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 258 with the following transitions: [2018-10-25 00:11:19,851 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [56], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [115], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [829], [831], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-25 00:11:19,857 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 00:11:19,858 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 00:11:24,321 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 00:11:24,322 INFO L272 AbstractInterpreter]: Visited 180 different actions 546 times. Merged at 8 different actions 31 times. Never widened. Found 5 fixpoints after 2 different actions. Largest state had 88 variables. [2018-10-25 00:11:24,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:11:24,329 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 00:11:24,329 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 00:11:24,329 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 00:11:24,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:11:24,342 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 00:11:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:11:24,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 00:11:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-25 00:11:24,833 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 00:11:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 89 proven. 14 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-10-25 00:11:24,995 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-25 00:11:24,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2018-10-25 00:11:24,995 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-25 00:11:24,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-25 00:11:24,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-25 00:11:24,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-10-25 00:11:24,996 INFO L87 Difference]: Start difference. First operand 23790 states and 37100 transitions. Second operand 8 states. [2018-10-25 00:11:30,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 00:11:30,240 INFO L93 Difference]: Finished difference Result 86710 states and 171769 transitions. [2018-10-25 00:11:30,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-25 00:11:30,240 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 257 [2018-10-25 00:11:30,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 00:11:30,723 INFO L225 Difference]: With dead ends: 86710 [2018-10-25 00:11:30,724 INFO L226 Difference]: Without dead ends: 63345 [2018-10-25 00:11:30,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2018-10-25 00:11:30,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63345 states. [2018-10-25 00:11:32,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63345 to 61639. [2018-10-25 00:11:32,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61639 states. [2018-10-25 00:11:33,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61639 states to 61639 states and 100418 transitions. [2018-10-25 00:11:33,110 INFO L78 Accepts]: Start accepts. Automaton has 61639 states and 100418 transitions. Word has length 257 [2018-10-25 00:11:33,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 00:11:33,111 INFO L481 AbstractCegarLoop]: Abstraction has 61639 states and 100418 transitions. [2018-10-25 00:11:33,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-25 00:11:33,111 INFO L276 IsEmpty]: Start isEmpty. Operand 61639 states and 100418 transitions. [2018-10-25 00:11:33,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-10-25 00:11:33,190 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 00:11:33,191 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 00:11:33,191 INFO L424 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 00:11:33,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:11:33,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1971503759, now seen corresponding path program 1 times [2018-10-25 00:11:33,191 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 00:11:33,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:11:33,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:11:33,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:11:33,193 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 00:11:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:11:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 00:11:33,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 00:11:33,754 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 00:11:33,755 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 272 with the following transitions: [2018-10-25 00:11:33,755 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [315], [320], [322], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [829], [831], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-25 00:11:33,764 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 00:11:33,764 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 00:11:36,736 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 00:11:36,736 INFO L272 AbstractInterpreter]: Visited 176 different actions 344 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-25 00:11:36,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:11:36,743 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 00:11:36,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 00:11:36,743 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 00:11:36,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:11:36,753 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 00:11:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:11:36,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 00:11:37,711 WARN L179 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2018-10-25 00:11:37,970 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 00:11:37,970 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 00:11:38,292 WARN L179 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2018-10-25 00:11:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 00:11:38,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-25 00:11:38,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2018-10-25 00:11:38,564 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-25 00:11:38,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-25 00:11:38,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-25 00:11:38,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2018-10-25 00:11:38,565 INFO L87 Difference]: Start difference. First operand 61639 states and 100418 transitions. Second operand 10 states. [2018-10-25 00:11:49,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 00:11:49,406 INFO L93 Difference]: Finished difference Result 150245 states and 283941 transitions. [2018-10-25 00:11:49,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-25 00:11:49,407 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 271 [2018-10-25 00:11:49,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 00:11:50,184 INFO L225 Difference]: With dead ends: 150245 [2018-10-25 00:11:50,184 INFO L226 Difference]: Without dead ends: 89030 [2018-10-25 00:11:50,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 562 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=659, Invalid=2763, Unknown=0, NotChecked=0, Total=3422 [2018-10-25 00:11:50,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89030 states. [2018-10-25 00:11:53,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89030 to 84494. [2018-10-25 00:11:53,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84494 states. [2018-10-25 00:11:53,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84494 states to 84494 states and 128623 transitions. [2018-10-25 00:11:53,893 INFO L78 Accepts]: Start accepts. Automaton has 84494 states and 128623 transitions. Word has length 271 [2018-10-25 00:11:53,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 00:11:53,893 INFO L481 AbstractCegarLoop]: Abstraction has 84494 states and 128623 transitions. [2018-10-25 00:11:53,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-25 00:11:53,894 INFO L276 IsEmpty]: Start isEmpty. Operand 84494 states and 128623 transitions. [2018-10-25 00:11:53,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2018-10-25 00:11:53,991 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 00:11:53,992 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 00:11:53,992 INFO L424 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 00:11:53,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:11:53,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1501712098, now seen corresponding path program 1 times [2018-10-25 00:11:53,993 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 00:11:53,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:11:53,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:11:53,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:11:53,994 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 00:11:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:11:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 130 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-25 00:11:55,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 00:11:55,093 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 00:11:55,093 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 286 with the following transitions: [2018-10-25 00:11:55,094 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [115], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [240], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [829], [831], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-25 00:11:55,100 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 00:11:55,100 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 00:11:57,079 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 00:11:57,080 INFO L272 AbstractInterpreter]: Visited 177 different actions 352 times. Merged at 7 different actions 10 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 88 variables. [2018-10-25 00:11:57,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:11:57,088 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 00:11:57,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 00:11:57,088 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 00:11:57,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:11:57,097 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 00:11:57,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:11:57,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 00:11:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-25 00:11:57,547 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 00:11:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 115 proven. 62 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-25 00:11:57,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-25 00:11:57,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2018-10-25 00:11:57,908 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-25 00:11:57,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-25 00:11:57,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-25 00:11:57,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-10-25 00:11:57,910 INFO L87 Difference]: Start difference. First operand 84494 states and 128623 transitions. Second operand 12 states. [2018-10-25 00:12:17,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 00:12:17,483 INFO L93 Difference]: Finished difference Result 309582 states and 510317 transitions. [2018-10-25 00:12:17,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-25 00:12:17,483 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 285 [2018-10-25 00:12:17,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 00:12:18,971 INFO L225 Difference]: With dead ends: 309582 [2018-10-25 00:12:18,971 INFO L226 Difference]: Without dead ends: 225511 [2018-10-25 00:12:19,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3397 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1445, Invalid=7867, Unknown=0, NotChecked=0, Total=9312 [2018-10-25 00:12:19,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225511 states. [2018-10-25 00:12:33,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225511 to 219752. [2018-10-25 00:12:33,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219752 states. [2018-10-25 00:12:34,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219752 states to 219752 states and 316479 transitions. [2018-10-25 00:12:34,373 INFO L78 Accepts]: Start accepts. Automaton has 219752 states and 316479 transitions. Word has length 285 [2018-10-25 00:12:34,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 00:12:34,373 INFO L481 AbstractCegarLoop]: Abstraction has 219752 states and 316479 transitions. [2018-10-25 00:12:34,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-25 00:12:34,373 INFO L276 IsEmpty]: Start isEmpty. Operand 219752 states and 316479 transitions. [2018-10-25 00:12:34,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-25 00:12:34,534 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 00:12:34,534 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 00:12:34,535 INFO L424 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 00:12:34,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:12:34,535 INFO L82 PathProgramCache]: Analyzing trace with hash 2078743378, now seen corresponding path program 1 times [2018-10-25 00:12:34,535 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 00:12:34,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:12:34,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:12:34,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:12:34,536 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 00:12:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:12:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 154 proven. 14 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-10-25 00:12:34,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 00:12:34,924 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 00:12:34,924 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 304 with the following transitions: [2018-10-25 00:12:34,924 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [56], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [115], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [174], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [829], [831], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-25 00:12:34,930 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 00:12:34,931 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 00:12:39,794 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 00:12:39,795 INFO L272 AbstractInterpreter]: Visited 181 different actions 549 times. Merged at 8 different actions 31 times. Never widened. Found 5 fixpoints after 2 different actions. Largest state had 88 variables. [2018-10-25 00:12:39,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:12:39,801 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 00:12:39,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 00:12:39,801 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 00:12:39,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:12:39,810 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 00:12:40,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:12:40,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 00:12:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-10-25 00:12:40,162 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 00:12:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 154 proven. 14 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-10-25 00:12:40,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-25 00:12:40,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2018-10-25 00:12:40,297 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-25 00:12:40,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-25 00:12:40,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-25 00:12:40,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-10-25 00:12:40,299 INFO L87 Difference]: Start difference. First operand 219752 states and 316479 transitions. Second operand 8 states. Received shutdown request... [2018-10-25 00:12:57,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-25 00:12:57,062 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-25 00:12:57,069 WARN L205 ceAbstractionStarter]: Timeout [2018-10-25 00:12:57,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 12:12:57 BoogieIcfgContainer [2018-10-25 00:12:57,069 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-25 00:12:57,070 INFO L168 Benchmark]: Toolchain (without parser) took 215690.03 ms. Allocated memory was 1.5 GB in the beginning and 5.1 GB in the end (delta: 3.6 GB). Free memory was 1.4 GB in the beginning and 3.2 GB in the end (delta: -1.7 GB). Peak memory consumption was 3.5 GB. Max. memory is 7.1 GB. [2018-10-25 00:12:57,071 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-25 00:12:57,073 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1171.48 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-10-25 00:12:57,073 INFO L168 Benchmark]: Boogie Procedure Inliner took 313.64 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 748.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -874.0 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. [2018-10-25 00:12:57,074 INFO L168 Benchmark]: Boogie Preprocessor took 139.99 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2018-10-25 00:12:57,076 INFO L168 Benchmark]: RCFGBuilder took 5322.95 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 257.6 MB). Peak memory consumption was 257.6 MB. Max. memory is 7.1 GB. [2018-10-25 00:12:57,077 INFO L168 Benchmark]: TraceAbstraction took 208736.85 ms. Allocated memory was 2.3 GB in the beginning and 5.1 GB in the end (delta: 2.9 GB). Free memory was 1.9 GB in the beginning and 3.2 GB in the end (delta: -1.2 GB). Peak memory consumption was 3.3 GB. Max. memory is 7.1 GB. [2018-10-25 00:12:57,083 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1171.48 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 313.64 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 748.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -874.0 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 139.99 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5322.95 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 257.6 MB). Peak memory consumption was 257.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 208736.85 ms. Allocated memory was 2.3 GB in the beginning and 5.1 GB in the end (delta: 2.9 GB). Free memory was 1.9 GB in the beginning and 3.2 GB in the end (delta: -1.2 GB). Peak memory consumption was 3.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1527]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1527). Cancelled while BasicCegarLoop was constructing difference of abstraction (219752states) and FLOYD_HOARE automaton (currently 32 states, 8 states before enhancement),while ReachableStatesComputation was computing reachable states (733593 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 208.6s OverallTime, 13 OverallIterations, 6 TraceHistogramMax, 144.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3265 SDtfs, 22338 SDslu, 4172 SDs, 0 SdLazy, 34545 SolverSat, 6986 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 88.6s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 4477 GetRequests, 4192 SyntacticMatches, 9 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4913 ImplicationChecksByTransitivity, 8.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=219752occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 24.4s AbstIntTime, 9 AbstIntIterations, 2 AbstIntStrong, 0.9992363880400594 AbsIntWeakeningRatio, 0.27450980392156865 AbsIntAvgWeakeningVarsNumRemoved, 26.78867102396514 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 22.6s AutomataMinimizationTime, 12 MinimizatonAttempts, 12365 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 9.5s InterpolantComputationTime, 4832 NumberOfCodeBlocks, 4832 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 6627 ConstructedInterpolants, 0 QuantifiedInterpolants, 3254698 SizeOfPredicates, 30 NumberOfNonLiveVariables, 8803 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 27 InterpolantComputations, 7 PerfectInterpolantSequences, 3068/3275 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown