java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label59_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 15:15:45,611 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 15:15:45,614 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 15:15:45,633 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 15:15:45,633 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 15:15:45,635 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 15:15:45,637 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 15:15:45,640 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 15:15:45,642 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 15:15:45,643 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 15:15:45,644 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 15:15:45,644 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 15:15:45,646 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 15:15:45,647 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 15:15:45,656 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 15:15:45,657 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 15:15:45,660 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 15:15:45,663 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 15:15:45,667 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 15:15:45,668 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 15:15:45,670 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 15:15:45,672 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 15:15:45,674 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 15:15:45,674 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 15:15:45,674 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 15:15:45,675 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 15:15:45,676 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 15:15:45,677 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 15:15:45,677 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 15:15:45,678 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 15:15:45,679 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 15:15:45,679 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 15:15:45,679 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 15:15:45,680 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 15:15:45,681 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 15:15:45,681 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 15:15:45,682 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-11-07 15:15:45,702 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 15:15:45,702 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 15:15:45,703 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 15:15:45,704 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 15:15:45,704 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 15:15:45,704 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 15:15:45,704 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 15:15:45,705 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 15:15:45,705 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 15:15:45,705 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 15:15:45,705 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 15:15:45,705 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 15:15:45,706 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 15:15:45,706 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 15:15:45,706 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 15:15:45,707 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 15:15:45,708 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 15:15:45,708 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 15:15:45,708 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 15:15:45,708 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 15:15:45,708 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 15:15:45,709 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 15:15:45,709 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 15:15:45,709 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 15:15:45,709 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 15:15:45,709 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 15:15:45,710 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 15:15:45,710 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 15:15:45,710 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 15:15:45,710 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 15:15:45,711 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 15:15:45,711 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 15:15:45,711 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 15:15:45,711 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 15:15:45,765 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 15:15:45,779 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 15:15:45,783 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 15:15:45,785 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 15:15:45,785 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 15:15:45,786 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label59_true-unreach-call.c [2018-11-07 15:15:45,850 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e1471369/79ea30b0614845d1aeecd2bedccc299a/FLAGfee73a9c2 [2018-11-07 15:15:46,555 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 15:15:46,556 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label59_true-unreach-call.c [2018-11-07 15:15:46,583 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e1471369/79ea30b0614845d1aeecd2bedccc299a/FLAGfee73a9c2 [2018-11-07 15:15:46,605 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e1471369/79ea30b0614845d1aeecd2bedccc299a [2018-11-07 15:15:46,615 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 15:15:46,617 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 15:15:46,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 15:15:46,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 15:15:46,622 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 15:15:46,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:15:46" (1/1) ... [2018-11-07 15:15:46,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2907b2be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:46, skipping insertion in model container [2018-11-07 15:15:46,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:15:46" (1/1) ... [2018-11-07 15:15:46,638 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 15:15:46,759 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 15:15:47,681 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:15:47,685 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 15:15:48,012 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:15:48,035 INFO L193 MainTranslator]: Completed translation [2018-11-07 15:15:48,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:48 WrapperNode [2018-11-07 15:15:48,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 15:15:48,037 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 15:15:48,038 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 15:15:48,038 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 15:15:48,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:48" (1/1) ... [2018-11-07 15:15:48,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:48" (1/1) ... [2018-11-07 15:15:48,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 15:15:48,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 15:15:48,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 15:15:48,281 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 15:15:48,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:48" (1/1) ... [2018-11-07 15:15:48,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:48" (1/1) ... [2018-11-07 15:15:48,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:48" (1/1) ... [2018-11-07 15:15:48,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:48" (1/1) ... [2018-11-07 15:15:48,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:48" (1/1) ... [2018-11-07 15:15:48,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:48" (1/1) ... [2018-11-07 15:15:48,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:48" (1/1) ... [2018-11-07 15:15:48,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 15:15:48,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 15:15:48,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 15:15:48,437 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 15:15:48,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 15:15:48,531 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 15:15:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 15:15:48,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 15:15:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 15:15:48,532 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 15:15:48,533 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 15:15:48,533 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 15:15:48,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 15:15:48,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 15:15:48,534 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 15:15:48,534 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 15:15:56,589 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 15:15:56,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:15:56 BoogieIcfgContainer [2018-11-07 15:15:56,593 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 15:15:56,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 15:15:56,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 15:15:56,598 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 15:15:56,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:15:46" (1/3) ... [2018-11-07 15:15:56,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c0c4e37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:15:56, skipping insertion in model container [2018-11-07 15:15:56,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:48" (2/3) ... [2018-11-07 15:15:56,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c0c4e37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:15:56, skipping insertion in model container [2018-11-07 15:15:56,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:15:56" (3/3) ... [2018-11-07 15:15:56,604 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label59_true-unreach-call.c [2018-11-07 15:15:56,613 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 15:15:56,622 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 15:15:56,638 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 15:15:56,681 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 15:15:56,681 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 15:15:56,681 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 15:15:56,681 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 15:15:56,681 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 15:15:56,682 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 15:15:56,682 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 15:15:56,682 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 15:15:56,719 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-11-07 15:15:56,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-07 15:15:56,734 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:15:56,736 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] [2018-11-07 15:15:56,741 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:15:56,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:15:56,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1120743887, now seen corresponding path program 1 times [2018-11-07 15:15:56,754 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:15:56,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:15:56,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:15:56,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:15:56,810 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:15:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:15:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:15:57,412 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:15:57,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 15:15:57,416 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:15:57,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 15:15:57,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 15:15:57,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:15:57,470 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 4 states. [2018-11-07 15:16:03,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:16:03,637 INFO L93 Difference]: Finished difference Result 1558 states and 2849 transitions. [2018-11-07 15:16:03,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 15:16:03,639 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2018-11-07 15:16:03,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:16:03,667 INFO L225 Difference]: With dead ends: 1558 [2018-11-07 15:16:03,667 INFO L226 Difference]: Without dead ends: 1114 [2018-11-07 15:16:03,680 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:16:03,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2018-11-07 15:16:03,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 759. [2018-11-07 15:16:03,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 759 states. [2018-11-07 15:16:03,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1355 transitions. [2018-11-07 15:16:03,799 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1355 transitions. Word has length 61 [2018-11-07 15:16:03,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:16:03,800 INFO L480 AbstractCegarLoop]: Abstraction has 759 states and 1355 transitions. [2018-11-07 15:16:03,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 15:16:03,800 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1355 transitions. [2018-11-07 15:16:03,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-11-07 15:16:03,808 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:16:03,809 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:16:03,809 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:16:03,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:16:03,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1471271461, now seen corresponding path program 1 times [2018-11-07 15:16:03,810 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:16:03,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:16:03,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:16:03,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:16:03,812 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:16:03,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:16:04,283 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:16:04,284 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:16:04,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 15:16:04,284 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:16:04,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 15:16:04,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 15:16:04,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 15:16:04,288 INFO L87 Difference]: Start difference. First operand 759 states and 1355 transitions. Second operand 5 states. [2018-11-07 15:16:14,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:16:14,458 INFO L93 Difference]: Finished difference Result 2506 states and 4577 transitions. [2018-11-07 15:16:14,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:16:14,460 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2018-11-07 15:16:14,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:16:14,479 INFO L225 Difference]: With dead ends: 2506 [2018-11-07 15:16:14,479 INFO L226 Difference]: Without dead ends: 1753 [2018-11-07 15:16:14,486 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-11-07 15:16:14,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2018-11-07 15:16:14,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 1733. [2018-11-07 15:16:14,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1733 states. [2018-11-07 15:16:14,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 3007 transitions. [2018-11-07 15:16:14,598 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 3007 transitions. Word has length 131 [2018-11-07 15:16:14,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:16:14,599 INFO L480 AbstractCegarLoop]: Abstraction has 1733 states and 3007 transitions. [2018-11-07 15:16:14,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 15:16:14,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 3007 transitions. [2018-11-07 15:16:14,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-11-07 15:16:14,607 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:16:14,612 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:16:14,612 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:16:14,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:16:14,612 INFO L82 PathProgramCache]: Analyzing trace with hash -708902120, now seen corresponding path program 1 times [2018-11-07 15:16:14,613 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:16:14,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:16:14,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:16:14,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:16:14,618 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:16:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:16:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:16:14,847 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:16:14,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:16:14,848 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:16:14,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:16:14,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:16:14,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:16:14,850 INFO L87 Difference]: Start difference. First operand 1733 states and 3007 transitions. Second operand 6 states. [2018-11-07 15:16:21,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:16:21,481 INFO L93 Difference]: Finished difference Result 5406 states and 9994 transitions. [2018-11-07 15:16:21,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 15:16:21,481 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 132 [2018-11-07 15:16:21,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:16:21,519 INFO L225 Difference]: With dead ends: 5406 [2018-11-07 15:16:21,519 INFO L226 Difference]: Without dead ends: 3679 [2018-11-07 15:16:21,546 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-07 15:16:21,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3679 states. [2018-11-07 15:16:21,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3679 to 3590. [2018-11-07 15:16:21,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3590 states. [2018-11-07 15:16:21,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3590 states to 3590 states and 5510 transitions. [2018-11-07 15:16:21,683 INFO L78 Accepts]: Start accepts. Automaton has 3590 states and 5510 transitions. Word has length 132 [2018-11-07 15:16:21,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:16:21,683 INFO L480 AbstractCegarLoop]: Abstraction has 3590 states and 5510 transitions. [2018-11-07 15:16:21,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:16:21,684 INFO L276 IsEmpty]: Start isEmpty. Operand 3590 states and 5510 transitions. [2018-11-07 15:16:21,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-11-07 15:16:21,687 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:16:21,687 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:16:21,687 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:16:21,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:16:21,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1451874528, now seen corresponding path program 1 times [2018-11-07 15:16:21,688 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:16:21,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:16:21,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:16:21,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:16:21,690 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:16:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:16:21,995 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:16:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:16:22,380 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:16:22,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:16:22,381 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:16:22,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:16:22,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:16:22,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:16:22,383 INFO L87 Difference]: Start difference. First operand 3590 states and 5510 transitions. Second operand 6 states. [2018-11-07 15:16:27,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:16:27,480 INFO L93 Difference]: Finished difference Result 10274 states and 16969 transitions. [2018-11-07 15:16:27,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:16:27,481 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2018-11-07 15:16:27,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:16:27,536 INFO L225 Difference]: With dead ends: 10274 [2018-11-07 15:16:27,536 INFO L226 Difference]: Without dead ends: 6999 [2018-11-07 15:16:27,578 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:16:27,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6999 states. [2018-11-07 15:16:27,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6999 to 6946. [2018-11-07 15:16:27,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6946 states. [2018-11-07 15:16:27,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6946 states to 6946 states and 10092 transitions. [2018-11-07 15:16:27,806 INFO L78 Accepts]: Start accepts. Automaton has 6946 states and 10092 transitions. Word has length 136 [2018-11-07 15:16:27,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:16:27,806 INFO L480 AbstractCegarLoop]: Abstraction has 6946 states and 10092 transitions. [2018-11-07 15:16:27,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:16:27,807 INFO L276 IsEmpty]: Start isEmpty. Operand 6946 states and 10092 transitions. [2018-11-07 15:16:27,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-11-07 15:16:27,811 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:16:27,811 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:16:27,811 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:16:27,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:16:27,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1453868313, now seen corresponding path program 1 times [2018-11-07 15:16:27,812 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:16:27,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:16:27,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:16:27,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:16:27,814 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:16:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:16:28,306 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:16:28,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:16:28,307 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 15:16:28,308 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 158 with the following transitions: [2018-11-07 15:16:28,310 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [461], [463], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 15:16:28,372 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 15:16:28,373 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 15:16:28,945 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 15:16:30,169 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 15:16:30,171 INFO L272 AbstractInterpreter]: Visited 104 different actions 691 times. Merged at 5 different actions 30 times. Widened at 1 different actions 2 times. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 15:16:30,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:16:30,216 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 15:16:30,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:16:30,216 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 15:16:30,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:16:30,238 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 15:16:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:16:30,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 15:16:34,067 WARN L179 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 37 [2018-11-07 15:16:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:16:35,992 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 15:16:36,539 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:16:36,574 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 15:16:36,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 11 [2018-11-07 15:16:36,574 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:16:36,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 15:16:36,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 15:16:36,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-11-07 15:16:36,577 INFO L87 Difference]: Start difference. First operand 6946 states and 10092 transitions. Second operand 3 states. [2018-11-07 15:16:40,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:16:40,113 INFO L93 Difference]: Finished difference Result 14832 states and 22598 transitions. [2018-11-07 15:16:40,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 15:16:40,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 157 [2018-11-07 15:16:40,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:16:40,176 INFO L225 Difference]: With dead ends: 14832 [2018-11-07 15:16:40,176 INFO L226 Difference]: Without dead ends: 8201 [2018-11-07 15:16:40,235 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 310 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-11-07 15:16:40,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8201 states. [2018-11-07 15:16:40,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8201 to 8192. [2018-11-07 15:16:40,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8192 states. [2018-11-07 15:16:40,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8192 states to 8192 states and 12307 transitions. [2018-11-07 15:16:40,507 INFO L78 Accepts]: Start accepts. Automaton has 8192 states and 12307 transitions. Word has length 157 [2018-11-07 15:16:40,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:16:40,508 INFO L480 AbstractCegarLoop]: Abstraction has 8192 states and 12307 transitions. [2018-11-07 15:16:40,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 15:16:40,509 INFO L276 IsEmpty]: Start isEmpty. Operand 8192 states and 12307 transitions. [2018-11-07 15:16:40,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-11-07 15:16:40,522 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:16:40,522 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:16:40,523 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:16:40,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:16:40,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1908896947, now seen corresponding path program 1 times [2018-11-07 15:16:40,524 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:16:40,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:16:40,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:16:40,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:16:40,526 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:16:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:16:41,188 WARN L179 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2018-11-07 15:16:41,525 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-11-07 15:16:41,729 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:16:41,729 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:16:41,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:16:41,730 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:16:41,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:16:41,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:16:41,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:16:41,731 INFO L87 Difference]: Start difference. First operand 8192 states and 12307 transitions. Second operand 6 states. [2018-11-07 15:16:47,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:16:47,606 INFO L93 Difference]: Finished difference Result 16766 states and 26206 transitions. [2018-11-07 15:16:47,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 15:16:47,620 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 229 [2018-11-07 15:16:47,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:16:47,691 INFO L225 Difference]: With dead ends: 16766 [2018-11-07 15:16:47,691 INFO L226 Difference]: Without dead ends: 8889 [2018-11-07 15:16:47,740 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:16:47,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8889 states. [2018-11-07 15:16:48,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8889 to 8739. [2018-11-07 15:16:48,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8739 states. [2018-11-07 15:16:48,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8739 states to 8739 states and 13127 transitions. [2018-11-07 15:16:48,186 INFO L78 Accepts]: Start accepts. Automaton has 8739 states and 13127 transitions. Word has length 229 [2018-11-07 15:16:48,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:16:48,186 INFO L480 AbstractCegarLoop]: Abstraction has 8739 states and 13127 transitions. [2018-11-07 15:16:48,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:16:48,187 INFO L276 IsEmpty]: Start isEmpty. Operand 8739 states and 13127 transitions. [2018-11-07 15:16:48,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-11-07 15:16:48,204 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:16:48,205 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 15:16:48,205 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:16:48,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:16:48,206 INFO L82 PathProgramCache]: Analyzing trace with hash 2118867734, now seen corresponding path program 1 times [2018-11-07 15:16:48,206 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:16:48,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:16:48,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:16:48,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:16:48,207 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:16:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:16:48,459 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:16:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 108 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 15:16:48,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:16:48,709 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 15:16:48,709 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 266 with the following transitions: [2018-11-07 15:16:48,710 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [461], [463], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [633], [638], [640], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [782], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 15:16:48,717 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 15:16:48,717 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 15:16:48,858 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 15:16:48,858 INFO L272 AbstractInterpreter]: Visited 122 different actions 122 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 15:16:48,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:16:48,901 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 15:16:49,380 INFO L227 lantSequenceWeakener]: Weakened 254 states. On average, predicates are now at 78.03% of their original sizes. [2018-11-07 15:16:49,381 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 15:16:49,868 INFO L415 sIntCurrentIteration]: We unified 264 AI predicates to 264 [2018-11-07 15:16:49,868 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 15:16:49,869 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 15:16:49,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2018-11-07 15:16:49,870 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:16:49,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 15:16:49,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 15:16:49,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 15:16:49,871 INFO L87 Difference]: Start difference. First operand 8739 states and 13127 transitions. Second operand 8 states. [2018-11-07 15:16:53,761 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown