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/Problem10_label23_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 07:28:49,712 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 07:28:49,714 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 07:28:49,726 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 07:28:49,726 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 07:28:49,727 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 07:28:49,729 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 07:28:49,733 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 07:28:49,736 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 07:28:49,743 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 07:28:49,746 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 07:28:49,746 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 07:28:49,747 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 07:28:49,748 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 07:28:49,753 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 07:28:49,753 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 07:28:49,754 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 07:28:49,757 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 07:28:49,763 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 07:28:49,764 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 07:28:49,768 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 07:28:49,769 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 07:28:49,774 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 07:28:49,774 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 07:28:49,775 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 07:28:49,775 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 07:28:49,776 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 07:28:49,777 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 07:28:49,779 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 07:28:49,780 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 07:28:49,780 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 07:28:49,781 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 07:28:49,781 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 07:28:49,781 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 07:28:49,784 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 07:28:49,784 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 07:28:49,785 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 [2018-10-27 07:28:49,810 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 07:28:49,810 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 07:28:49,812 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 07:28:49,812 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 07:28:49,812 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 07:28:49,813 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 07:28:49,813 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-27 07:28:49,813 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 07:28:49,813 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 07:28:49,813 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 07:28:49,814 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 07:28:49,816 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 07:28:49,817 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 07:28:49,817 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 07:28:49,818 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 07:28:49,818 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 07:28:49,818 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 07:28:49,818 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 07:28:49,818 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 07:28:49,819 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 07:28:49,819 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 07:28:49,819 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 07:28:49,819 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 07:28:49,819 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 07:28:49,820 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 07:28:49,820 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 07:28:49,820 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 07:28:49,820 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 07:28:49,820 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 07:28:49,821 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 07:28:49,821 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 07:28:49,821 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 07:28:49,821 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 07:28:49,821 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 07:28:49,822 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 07:28:49,822 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 07:28:49,879 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 07:28:49,897 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 07:28:49,901 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 07:28:49,903 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 07:28:49,903 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 07:28:49,904 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label23_true-unreach-call.c [2018-10-27 07:28:49,982 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e0b9be2c2/68408e0820ee4377996615fed7c10d30/FLAG1572eae47 [2018-10-27 07:28:50,553 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 07:28:50,556 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label23_true-unreach-call.c [2018-10-27 07:28:50,567 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e0b9be2c2/68408e0820ee4377996615fed7c10d30/FLAG1572eae47 [2018-10-27 07:28:50,583 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e0b9be2c2/68408e0820ee4377996615fed7c10d30 [2018-10-27 07:28:50,594 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 07:28:50,596 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 07:28:50,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 07:28:50,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 07:28:50,601 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 07:28:50,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:28:50" (1/1) ... [2018-10-27 07:28:50,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58cac14f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:28:50, skipping insertion in model container [2018-10-27 07:28:50,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:28:50" (1/1) ... [2018-10-27 07:28:50,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 07:28:50,669 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 07:28:51,173 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 07:28:51,178 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 07:28:51,327 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 07:28:51,344 INFO L193 MainTranslator]: Completed translation [2018-10-27 07:28:51,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:28:51 WrapperNode [2018-10-27 07:28:51,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 07:28:51,346 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 07:28:51,346 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 07:28:51,346 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 07:28:51,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:28:51" (1/1) ... [2018-10-27 07:28:51,373 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:28:51" (1/1) ... [2018-10-27 07:28:51,537 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 07:28:51,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 07:28:51,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 07:28:51,538 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 07:28:51,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:28:51" (1/1) ... [2018-10-27 07:28:51,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:28:51" (1/1) ... [2018-10-27 07:28:51,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:28:51" (1/1) ... [2018-10-27 07:28:51,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:28:51" (1/1) ... [2018-10-27 07:28:51,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:28:51" (1/1) ... [2018-10-27 07:28:51,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:28:51" (1/1) ... [2018-10-27 07:28:51,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:28:51" (1/1) ... [2018-10-27 07:28:51,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 07:28:51,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 07:28:51,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 07:28:51,645 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 07:28:51,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:28:51" (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 [2018-10-27 07:28:51,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 07:28:51,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 07:28:51,722 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 07:28:51,722 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 07:28:51,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 07:28:51,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 07:28:51,723 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 07:28:51,725 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 07:28:55,238 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 07:28:55,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:28:55 BoogieIcfgContainer [2018-10-27 07:28:55,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 07:28:55,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 07:28:55,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 07:28:55,246 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 07:28:55,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:28:50" (1/3) ... [2018-10-27 07:28:55,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6df32c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:28:55, skipping insertion in model container [2018-10-27 07:28:55,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:28:51" (2/3) ... [2018-10-27 07:28:55,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6df32c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:28:55, skipping insertion in model container [2018-10-27 07:28:55,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:28:55" (3/3) ... [2018-10-27 07:28:55,250 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem10_label23_true-unreach-call.c [2018-10-27 07:28:55,263 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 07:28:55,275 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 07:28:55,292 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 07:28:55,333 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 07:28:55,333 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 07:28:55,333 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 07:28:55,333 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 07:28:55,333 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 07:28:55,334 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 07:28:55,334 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 07:28:55,334 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 07:28:55,368 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states. [2018-10-27 07:28:55,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-27 07:28:55,377 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 07:28:55,378 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] [2018-10-27 07:28:55,380 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 07:28:55,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 07:28:55,385 INFO L82 PathProgramCache]: Analyzing trace with hash 508483465, now seen corresponding path program 1 times [2018-10-27 07:28:55,387 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 07:28:55,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:28:55,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 07:28:55,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:28:55,438 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 07:28:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 07:28:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 07:28:55,888 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 07:28:55,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 07:28:55,889 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 07:28:55,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 07:28:55,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 07:28:55,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 07:28:55,913 INFO L87 Difference]: Start difference. First operand 216 states. Second operand 3 states. [2018-10-27 07:28:57,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 07:28:57,601 INFO L93 Difference]: Finished difference Result 574 states and 992 transitions. [2018-10-27 07:28:57,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 07:28:57,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2018-10-27 07:28:57,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 07:28:57,623 INFO L225 Difference]: With dead ends: 574 [2018-10-27 07:28:57,623 INFO L226 Difference]: Without dead ends: 356 [2018-10-27 07:28:57,631 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 [2018-10-27 07:28:57,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2018-10-27 07:28:57,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 356. [2018-10-27 07:28:57,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2018-10-27 07:28:57,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 609 transitions. [2018-10-27 07:28:57,707 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 609 transitions. Word has length 53 [2018-10-27 07:28:57,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 07:28:57,708 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 609 transitions. [2018-10-27 07:28:57,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 07:28:57,709 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 609 transitions. [2018-10-27 07:28:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-27 07:28:57,717 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 07:28:57,718 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 07:28:57,718 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 07:28:57,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 07:28:57,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1327667053, now seen corresponding path program 1 times [2018-10-27 07:28:57,719 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 07:28:57,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:28:57,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 07:28:57,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:28:57,721 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 07:28:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 07:28:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 07:28:58,235 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 07:28:58,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 07:28:58,236 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 07:28:58,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 07:28:58,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 07:28:58,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 07:28:58,239 INFO L87 Difference]: Start difference. First operand 356 states and 609 transitions. Second operand 5 states. [2018-10-27 07:29:03,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 07:29:03,201 INFO L93 Difference]: Finished difference Result 1289 states and 2315 transitions. [2018-10-27 07:29:03,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 07:29:03,202 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 136 [2018-10-27 07:29:03,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 07:29:03,211 INFO L225 Difference]: With dead ends: 1289 [2018-10-27 07:29:03,211 INFO L226 Difference]: Without dead ends: 939 [2018-10-27 07:29:03,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 07:29:03,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2018-10-27 07:29:03,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 926. [2018-10-27 07:29:03,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2018-10-27 07:29:03,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1444 transitions. [2018-10-27 07:29:03,293 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1444 transitions. Word has length 136 [2018-10-27 07:29:03,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 07:29:03,294 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1444 transitions. [2018-10-27 07:29:03,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 07:29:03,295 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1444 transitions. [2018-10-27 07:29:03,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-27 07:29:03,300 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 07:29:03,300 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 07:29:03,301 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 07:29:03,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 07:29:03,301 INFO L82 PathProgramCache]: Analyzing trace with hash -734844493, now seen corresponding path program 1 times [2018-10-27 07:29:03,301 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 07:29:03,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:29:03,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 07:29:03,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:29:03,303 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 07:29:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 07:29:03,629 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 07:29:03,630 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 07:29:03,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 07:29:03,630 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 07:29:03,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 07:29:03,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 07:29:03,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 07:29:03,632 INFO L87 Difference]: Start difference. First operand 926 states and 1444 transitions. Second operand 6 states. [2018-10-27 07:29:07,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 07:29:07,476 INFO L93 Difference]: Finished difference Result 2537 states and 4091 transitions. [2018-10-27 07:29:07,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 07:29:07,479 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 152 [2018-10-27 07:29:07,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 07:29:07,495 INFO L225 Difference]: With dead ends: 2537 [2018-10-27 07:29:07,495 INFO L226 Difference]: Without dead ends: 1617 [2018-10-27 07:29:07,506 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 [2018-10-27 07:29:07,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2018-10-27 07:29:07,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1586. [2018-10-27 07:29:07,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1586 states. [2018-10-27 07:29:07,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 2321 transitions. [2018-10-27 07:29:07,574 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 2321 transitions. Word has length 152 [2018-10-27 07:29:07,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 07:29:07,575 INFO L481 AbstractCegarLoop]: Abstraction has 1586 states and 2321 transitions. [2018-10-27 07:29:07,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 07:29:07,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 2321 transitions. [2018-10-27 07:29:07,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-27 07:29:07,581 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 07:29:07,582 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 07:29:07,582 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 07:29:07,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 07:29:07,582 INFO L82 PathProgramCache]: Analyzing trace with hash -829584541, now seen corresponding path program 1 times [2018-10-27 07:29:07,583 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 07:29:07,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:29:07,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 07:29:07,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:29:07,584 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 07:29:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 07:29:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 07:29:07,880 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 07:29:07,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 07:29:07,880 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 07:29:07,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 07:29:07,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 07:29:07,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 07:29:07,882 INFO L87 Difference]: Start difference. First operand 1586 states and 2321 transitions. Second operand 6 states. [2018-10-27 07:29:09,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 07:29:09,287 INFO L93 Difference]: Finished difference Result 3508 states and 5316 transitions. [2018-10-27 07:29:09,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 07:29:09,295 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 176 [2018-10-27 07:29:09,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 07:29:09,311 INFO L225 Difference]: With dead ends: 3508 [2018-10-27 07:29:09,312 INFO L226 Difference]: Without dead ends: 1928 [2018-10-27 07:29:09,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 07:29:09,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2018-10-27 07:29:09,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1889. [2018-10-27 07:29:09,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1889 states. [2018-10-27 07:29:09,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 2675 transitions. [2018-10-27 07:29:09,387 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 2675 transitions. Word has length 176 [2018-10-27 07:29:09,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 07:29:09,388 INFO L481 AbstractCegarLoop]: Abstraction has 1889 states and 2675 transitions. [2018-10-27 07:29:09,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 07:29:09,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 2675 transitions. [2018-10-27 07:29:09,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-10-27 07:29:09,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 07:29:09,396 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 07:29:09,396 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 07:29:09,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 07:29:09,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1805277256, now seen corresponding path program 1 times [2018-10-27 07:29:09,397 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 07:29:09,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:29:09,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 07:29:09,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:29:09,398 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 07:29:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 07:29:09,819 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-27 07:29:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 170 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 07:29:10,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 07:29:10,153 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 07:29:10,154 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 217 with the following transitions: [2018-10-27 07:29:10,156 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [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], [325], [327], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [546], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-10-27 07:29:10,201 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 07:29:10,202 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 07:29:10,950 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 07:29:10,952 INFO L272 AbstractInterpreter]: Visited 92 different actions 182 times. Merged at 7 different actions 10 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 24 variables. [2018-10-27 07:29:10,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 07:29:10,996 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 07:29:10,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 07:29:10,996 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 [2018-10-27 07:29:11,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 07:29:11,014 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 07:29:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 07:29:11,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 07:29:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 170 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 07:29:11,968 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 07:29:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 170 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 07:29:12,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 07:29:12,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 17 [2018-10-27 07:29:12,271 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 07:29:12,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-27 07:29:12,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-27 07:29:12,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2018-10-27 07:29:12,273 INFO L87 Difference]: Start difference. First operand 1889 states and 2675 transitions. Second operand 15 states. [2018-10-27 07:29:13,275 WARN L179 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2018-10-27 07:29:21,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 07:29:21,268 INFO L93 Difference]: Finished difference Result 7128 states and 11119 transitions. [2018-10-27 07:29:21,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-27 07:29:21,268 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 216 [2018-10-27 07:29:21,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 07:29:21,300 INFO L225 Difference]: With dead ends: 7128 [2018-10-27 07:29:21,300 INFO L226 Difference]: Without dead ends: 4781 [2018-10-27 07:29:21,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 447 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=567, Invalid=1689, Unknown=0, NotChecked=0, Total=2256 [2018-10-27 07:29:21,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4781 states. [2018-10-27 07:29:21,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4781 to 4357. [2018-10-27 07:29:21,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4357 states. [2018-10-27 07:29:21,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4357 states to 4357 states and 5665 transitions. [2018-10-27 07:29:21,487 INFO L78 Accepts]: Start accepts. Automaton has 4357 states and 5665 transitions. Word has length 216 [2018-10-27 07:29:21,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 07:29:21,487 INFO L481 AbstractCegarLoop]: Abstraction has 4357 states and 5665 transitions. [2018-10-27 07:29:21,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-27 07:29:21,488 INFO L276 IsEmpty]: Start isEmpty. Operand 4357 states and 5665 transitions. [2018-10-27 07:29:21,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-10-27 07:29:21,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 07:29:21,501 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 07:29:21,502 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 07:29:21,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 07:29:21,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1366596424, now seen corresponding path program 1 times [2018-10-27 07:29:21,502 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 07:29:21,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:29:21,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 07:29:21,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:29:21,505 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 07:29:21,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 07:29:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 92 proven. 78 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 07:29:22,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 07:29:22,047 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 07:29:22,048 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 225 with the following transitions: [2018-10-27 07:29:22,048 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [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], [325], [327], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [546], [547], [551], [555], [559], [563], [566], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-10-27 07:29:22,055 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 07:29:22,057 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 07:29:22,187 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 07:29:22,188 INFO L272 AbstractInterpreter]: Visited 93 different actions 93 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-27 07:29:22,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 07:29:22,227 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 07:29:22,707 INFO L227 lantSequenceWeakener]: Weakened 215 states. On average, predicates are now at 73.41% of their original sizes. [2018-10-27 07:29:22,707 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 07:29:22,942 INFO L415 sIntCurrentIteration]: We unified 223 AI predicates to 223 [2018-10-27 07:29:22,943 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 07:29:22,943 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 07:29:22,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2018-10-27 07:29:22,944 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 07:29:22,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 07:29:22,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 07:29:22,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 07:29:22,952 INFO L87 Difference]: Start difference. First operand 4357 states and 5665 transitions. Second operand 6 states. [2018-10-27 07:29:39,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 07:29:39,554 INFO L93 Difference]: Finished difference Result 8844 states and 11475 transitions. [2018-10-27 07:29:39,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 07:29:39,554 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 224 [2018-10-27 07:29:39,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 07:29:39,574 INFO L225 Difference]: With dead ends: 8844 [2018-10-27 07:29:39,574 INFO L226 Difference]: Without dead ends: 4498 [2018-10-27 07:29:39,590 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 224 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-27 07:29:39,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4498 states. [2018-10-27 07:29:39,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4498 to 4496. [2018-10-27 07:29:39,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4496 states. [2018-10-27 07:29:39,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4496 states to 4496 states and 5803 transitions. [2018-10-27 07:29:39,695 INFO L78 Accepts]: Start accepts. Automaton has 4496 states and 5803 transitions. Word has length 224 [2018-10-27 07:29:39,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 07:29:39,696 INFO L481 AbstractCegarLoop]: Abstraction has 4496 states and 5803 transitions. [2018-10-27 07:29:39,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 07:29:39,696 INFO L276 IsEmpty]: Start isEmpty. Operand 4496 states and 5803 transitions. [2018-10-27 07:29:39,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-10-27 07:29:39,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 07:29:39,714 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-27 07:29:39,715 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 07:29:39,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 07:29:39,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1240790714, now seen corresponding path program 1 times [2018-10-27 07:29:39,715 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 07:29:39,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:29:39,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 07:29:39,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:29:39,717 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 07:29:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 07:29:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 212 proven. 82 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-27 07:29:40,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 07:29:40,534 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 07:29:40,534 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 296 with the following transitions: [2018-10-27 07:29:40,535 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [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], [325], [327], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [546], [547], [551], [555], [559], [563], [566], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-10-27 07:29:40,539 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 07:29:40,539 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 07:29:43,392 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 07:29:43,392 INFO L272 AbstractInterpreter]: Visited 98 different actions 386 times. Merged at 8 different actions 30 times. Never widened. Found 7 fixpoints after 2 different actions. Largest state had 24 variables. [2018-10-27 07:29:43,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 07:29:43,401 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 07:29:43,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 07:29:43,401 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 [2018-10-27 07:29:43,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 07:29:43,410 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 07:29:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 07:29:43,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 07:29:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 314 proven. 2 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-10-27 07:29:44,109 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 07:29:44,330 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-27 07:29:44,436 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-27 07:29:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 212 proven. 82 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-27 07:29:44,866 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 07:29:44,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 18 [2018-10-27 07:29:44,867 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 07:29:44,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-27 07:29:44,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-27 07:29:44,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2018-10-27 07:29:44,869 INFO L87 Difference]: Start difference. First operand 4496 states and 5803 transitions. Second operand 17 states. [2018-10-27 07:29:47,801 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2018-10-27 07:29:52,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 07:29:52,357 INFO L93 Difference]: Finished difference Result 9951 states and 13511 transitions. [2018-10-27 07:29:52,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-27 07:29:52,357 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 295 [2018-10-27 07:29:52,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 07:29:52,389 INFO L225 Difference]: With dead ends: 9951 [2018-10-27 07:29:52,389 INFO L226 Difference]: Without dead ends: 5635 [2018-10-27 07:29:52,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 614 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=613, Invalid=1837, Unknown=0, NotChecked=0, Total=2450 [2018-10-27 07:29:52,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5635 states. [2018-10-27 07:29:52,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5635 to 4476. [2018-10-27 07:29:52,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4476 states. [2018-10-27 07:29:52,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4476 states to 4476 states and 5459 transitions. [2018-10-27 07:29:52,663 INFO L78 Accepts]: Start accepts. Automaton has 4476 states and 5459 transitions. Word has length 295 [2018-10-27 07:29:52,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 07:29:52,664 INFO L481 AbstractCegarLoop]: Abstraction has 4476 states and 5459 transitions. [2018-10-27 07:29:52,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-27 07:29:52,664 INFO L276 IsEmpty]: Start isEmpty. Operand 4476 states and 5459 transitions. [2018-10-27 07:29:52,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-10-27 07:29:52,682 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 07:29:52,683 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-27 07:29:52,683 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 07:29:52,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 07:29:52,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1037984411, now seen corresponding path program 1 times [2018-10-27 07:29:52,684 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 07:29:52,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:29:52,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 07:29:52,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:29:52,686 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 07:29:52,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 07:29:53,340 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-27 07:29:53,570 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-27 07:29:54,070 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-27 07:29:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 229 proven. 158 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 07:29:54,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 07:29:54,579 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 07:29:54,579 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 341 with the following transitions: [2018-10-27 07:29:54,579 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [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], [325], [327], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [546], [547], [551], [555], [559], [563], [566], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [678], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-10-27 07:29:54,584 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 07:29:54,584 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 07:29:56,697 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 07:29:56,698 INFO L272 AbstractInterpreter]: Visited 126 different actions 379 times. Merged at 8 different actions 25 times. Never widened. Found 5 fixpoints after 2 different actions. Largest state had 24 variables. [2018-10-27 07:29:56,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 07:29:56,729 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 07:29:56,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 07:29:56,729 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 [2018-10-27 07:29:56,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 07:29:56,742 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 07:29:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 07:29:56,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 07:29:59,607 WARN L179 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 184 DAG size of output: 39 [2018-10-27 07:30:00,055 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 341 proven. 4 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-10-27 07:30:00,055 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 07:30:00,489 WARN L179 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2018-10-27 07:30:05,566 WARN L179 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 187 DAG size of output: 40 [2018-10-27 07:30:05,630 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 161 [2018-10-27 07:30:08,381 WARN L177 XnfTransformerHelper]: Simplifying conjuction of 7257 disjunctions. This might take some time... [2018-10-27 07:30:08,460 INFO L193 XnfTransformerHelper]: Simplified to conjuction of 12 disjunctions. [2018-10-27 07:30:17,532 WARN L179 SmtUtils]: Spent 8.69 s on a formula simplification. DAG size of input: 122 DAG size of output: 91 [2018-10-27 07:30:17,592 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 211 [2018-10-27 07:30:22,720 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 463