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.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label50_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 18:09:18,773 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 18:09:18,776 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 18:09:18,788 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 18:09:18,789 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 18:09:18,790 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 18:09:18,792 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 18:09:18,795 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 18:09:18,800 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 18:09:18,801 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 18:09:18,805 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 18:09:18,805 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 18:09:18,806 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 18:09:18,808 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 18:09:18,812 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 18:09:18,813 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 18:09:18,814 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 18:09:18,817 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 18:09:18,822 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 18:09:18,825 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 18:09:18,827 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 18:09:18,828 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 18:09:18,831 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 18:09:18,831 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 18:09:18,831 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 18:09:18,832 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 18:09:18,833 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 18:09:18,834 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 18:09:18,835 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 18:09:18,839 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 18:09:18,839 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 18:09:18,840 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-24 18:09:18,840 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 18:09:18,840 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 18:09:18,843 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 18:09:18,843 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 18:09:18,844 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-24 18:09:18,859 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 18:09:18,860 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 18:09:18,860 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 18:09:18,861 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 18:09:18,861 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 18:09:18,861 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 18:09:18,861 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 18:09:18,862 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 18:09:18,862 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 18:09:18,862 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 18:09:18,862 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 18:09:18,862 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 18:09:18,863 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 18:09:18,863 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 18:09:18,863 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 18:09:18,864 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 18:09:18,864 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 18:09:18,864 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 18:09:18,864 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 18:09:18,864 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 18:09:18,865 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 18:09:18,865 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 18:09:18,865 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 18:09:18,865 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 18:09:18,865 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 18:09:18,866 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 18:09:18,866 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 18:09:18,866 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 18:09:18,866 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 18:09:18,866 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 18:09:18,866 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 18:09:18,867 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 18:09:18,867 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 18:09:18,867 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 18:09:18,939 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 18:09:18,958 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 18:09:18,962 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 18:09:18,964 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 18:09:18,964 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 18:09:18,965 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label50_false-unreach-call.c [2018-10-24 18:09:19,031 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5158c4876/f8a485ef24c74705ad92802330b4c766/FLAG98127c590 [2018-10-24 18:09:19,638 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 18:09:19,639 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label50_false-unreach-call.c [2018-10-24 18:09:19,652 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5158c4876/f8a485ef24c74705ad92802330b4c766/FLAG98127c590 [2018-10-24 18:09:19,668 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5158c4876/f8a485ef24c74705ad92802330b4c766 [2018-10-24 18:09:19,680 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 18:09:19,682 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 18:09:19,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 18:09:19,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 18:09:19,687 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 18:09:19,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:09:19" (1/1) ... [2018-10-24 18:09:19,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c0d25d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:19, skipping insertion in model container [2018-10-24 18:09:19,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:09:19" (1/1) ... [2018-10-24 18:09:19,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 18:09:19,787 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 18:09:20,342 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 18:09:20,347 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 18:09:20,438 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 18:09:20,460 INFO L193 MainTranslator]: Completed translation [2018-10-24 18:09:20,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:20 WrapperNode [2018-10-24 18:09:20,461 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 18:09:20,462 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 18:09:20,462 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 18:09:20,462 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 18:09:20,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:20" (1/1) ... [2018-10-24 18:09:20,504 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:20" (1/1) ... [2018-10-24 18:09:20,702 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 18:09:20,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 18:09:20,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 18:09:20,703 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 18:09:20,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:20" (1/1) ... [2018-10-24 18:09:20,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:20" (1/1) ... [2018-10-24 18:09:20,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:20" (1/1) ... [2018-10-24 18:09:20,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:20" (1/1) ... [2018-10-24 18:09:20,785 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:20" (1/1) ... [2018-10-24 18:09:20,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:20" (1/1) ... [2018-10-24 18:09:20,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:20" (1/1) ... [2018-10-24 18:09:20,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 18:09:20,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 18:09:20,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 18:09:20,816 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 18:09:20,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:20" (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 [2018-10-24 18:09:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 18:09:20,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 18:09:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 18:09:20,905 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 18:09:20,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 18:09:20,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 18:09:20,906 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 18:09:20,906 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 18:09:24,348 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 18:09:24,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:09:24 BoogieIcfgContainer [2018-10-24 18:09:24,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 18:09:24,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 18:09:24,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 18:09:24,354 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 18:09:24,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 06:09:19" (1/3) ... [2018-10-24 18:09:24,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aec4869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:09:24, skipping insertion in model container [2018-10-24 18:09:24,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:20" (2/3) ... [2018-10-24 18:09:24,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aec4869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:09:24, skipping insertion in model container [2018-10-24 18:09:24,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:09:24" (3/3) ... [2018-10-24 18:09:24,358 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem10_label50_false-unreach-call.c [2018-10-24 18:09:24,368 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 18:09:24,376 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 18:09:24,395 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 18:09:24,433 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 18:09:24,434 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 18:09:24,434 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 18:09:24,434 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 18:09:24,434 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 18:09:24,435 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 18:09:24,435 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 18:09:24,435 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 18:09:24,463 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states. [2018-10-24 18:09:24,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-24 18:09:24,470 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:09:24,472 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:09:24,474 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:09:24,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:09:24,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1440940844, now seen corresponding path program 1 times [2018-10-24 18:09:24,484 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:09:24,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:24,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:09:24,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:24,540 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:09:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:09:24,863 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 18:09:24,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:09:24,900 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:09:24,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 18:09:24,900 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:09:24,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 18:09:24,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 18:09:24,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 18:09:24,920 INFO L87 Difference]: Start difference. First operand 216 states. Second operand 3 states. [2018-10-24 18:09:27,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:09:27,101 INFO L93 Difference]: Finished difference Result 574 states and 992 transitions. [2018-10-24 18:09:27,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 18:09:27,109 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2018-10-24 18:09:27,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:09:27,128 INFO L225 Difference]: With dead ends: 574 [2018-10-24 18:09:27,129 INFO L226 Difference]: Without dead ends: 356 [2018-10-24 18:09:27,137 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 [2018-10-24 18:09:27,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2018-10-24 18:09:27,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 356. [2018-10-24 18:09:27,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2018-10-24 18:09:27,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 609 transitions. [2018-10-24 18:09:27,213 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 609 transitions. Word has length 16 [2018-10-24 18:09:27,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:09:27,214 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 609 transitions. [2018-10-24 18:09:27,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 18:09:27,214 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 609 transitions. [2018-10-24 18:09:27,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-24 18:09:27,220 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:09:27,220 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 18:09:27,221 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:09:27,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:09:27,221 INFO L82 PathProgramCache]: Analyzing trace with hash -2043467860, now seen corresponding path program 1 times [2018-10-24 18:09:27,221 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:09:27,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:27,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:09:27,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:27,223 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:09:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:09:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:09:27,571 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:09:27,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 18:09:27,571 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:09:27,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 18:09:27,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 18:09:27,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 18:09:27,574 INFO L87 Difference]: Start difference. First operand 356 states and 609 transitions. Second operand 6 states. [2018-10-24 18:09:29,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:09:29,380 INFO L93 Difference]: Finished difference Result 867 states and 1507 transitions. [2018-10-24 18:09:29,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 18:09:29,381 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 90 [2018-10-24 18:09:29,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:09:29,387 INFO L225 Difference]: With dead ends: 867 [2018-10-24 18:09:29,387 INFO L226 Difference]: Without dead ends: 517 [2018-10-24 18:09:29,390 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 [2018-10-24 18:09:29,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2018-10-24 18:09:29,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 508. [2018-10-24 18:09:29,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2018-10-24 18:09:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 831 transitions. [2018-10-24 18:09:29,430 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 831 transitions. Word has length 90 [2018-10-24 18:09:29,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:09:29,430 INFO L481 AbstractCegarLoop]: Abstraction has 508 states and 831 transitions. [2018-10-24 18:09:29,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 18:09:29,431 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 831 transitions. [2018-10-24 18:09:29,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-24 18:09:29,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:09:29,435 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 18:09:29,435 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:09:29,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:09:29,435 INFO L82 PathProgramCache]: Analyzing trace with hash -663284288, now seen corresponding path program 1 times [2018-10-24 18:09:29,436 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:09:29,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:29,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:09:29,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:29,437 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:09:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:09:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:09:29,592 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:09:29,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 18:09:29,592 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:09:29,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 18:09:29,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 18:09:29,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 18:09:29,594 INFO L87 Difference]: Start difference. First operand 508 states and 831 transitions. Second operand 4 states. [2018-10-24 18:09:32,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:09:32,038 INFO L93 Difference]: Finished difference Result 1742 states and 2991 transitions. [2018-10-24 18:09:32,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 18:09:32,039 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2018-10-24 18:09:32,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:09:32,050 INFO L225 Difference]: With dead ends: 1742 [2018-10-24 18:09:32,050 INFO L226 Difference]: Without dead ends: 1240 [2018-10-24 18:09:32,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 18:09:32,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2018-10-24 18:09:32,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1240. [2018-10-24 18:09:32,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1240 states. [2018-10-24 18:09:32,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1869 transitions. [2018-10-24 18:09:32,168 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1869 transitions. Word has length 96 [2018-10-24 18:09:32,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:09:32,169 INFO L481 AbstractCegarLoop]: Abstraction has 1240 states and 1869 transitions. [2018-10-24 18:09:32,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 18:09:32,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1869 transitions. [2018-10-24 18:09:32,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-24 18:09:32,179 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:09:32,179 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:09:32,180 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:09:32,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:09:32,180 INFO L82 PathProgramCache]: Analyzing trace with hash -2144106089, now seen corresponding path program 1 times [2018-10-24 18:09:32,180 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:09:32,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:32,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:09:32,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:32,182 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:09:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:09:32,558 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 18:09:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:09:32,995 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:09:32,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 18:09:32,996 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:09:32,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 18:09:32,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 18:09:32,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 18:09:32,997 INFO L87 Difference]: Start difference. First operand 1240 states and 1869 transitions. Second operand 6 states. [2018-10-24 18:09:34,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:09:34,844 INFO L93 Difference]: Finished difference Result 2759 states and 4120 transitions. [2018-10-24 18:09:34,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 18:09:34,845 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 153 [2018-10-24 18:09:34,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:09:34,859 INFO L225 Difference]: With dead ends: 2759 [2018-10-24 18:09:34,859 INFO L226 Difference]: Without dead ends: 1525 [2018-10-24 18:09:34,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 18:09:34,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2018-10-24 18:09:34,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1485. [2018-10-24 18:09:34,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1485 states. [2018-10-24 18:09:34,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 2034 transitions. [2018-10-24 18:09:34,925 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 2034 transitions. Word has length 153 [2018-10-24 18:09:34,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:09:34,925 INFO L481 AbstractCegarLoop]: Abstraction has 1485 states and 2034 transitions. [2018-10-24 18:09:34,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 18:09:34,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 2034 transitions. [2018-10-24 18:09:34,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-24 18:09:34,930 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:09:34,930 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:09:34,930 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:09:34,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:09:34,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1320283371, now seen corresponding path program 1 times [2018-10-24 18:09:34,931 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:09:34,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:34,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:09:34,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:34,936 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:09:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:09:35,174 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 18:09:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:09:35,243 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:09:35,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 18:09:35,244 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:09:35,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 18:09:35,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 18:09:35,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 18:09:35,245 INFO L87 Difference]: Start difference. First operand 1485 states and 2034 transitions. Second operand 6 states. [2018-10-24 18:09:36,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:09:36,732 INFO L93 Difference]: Finished difference Result 3547 states and 5008 transitions. [2018-10-24 18:09:36,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 18:09:36,735 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 159 [2018-10-24 18:09:36,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:09:36,749 INFO L225 Difference]: With dead ends: 3547 [2018-10-24 18:09:36,749 INFO L226 Difference]: Without dead ends: 2068 [2018-10-24 18:09:36,758 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 [2018-10-24 18:09:36,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2018-10-24 18:09:36,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 2051. [2018-10-24 18:09:36,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2051 states. [2018-10-24 18:09:36,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 2708 transitions. [2018-10-24 18:09:36,818 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 2708 transitions. Word has length 159 [2018-10-24 18:09:36,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:09:36,819 INFO L481 AbstractCegarLoop]: Abstraction has 2051 states and 2708 transitions. [2018-10-24 18:09:36,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 18:09:36,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 2708 transitions. [2018-10-24 18:09:36,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-10-24 18:09:36,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:09:36,826 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 18:09:36,826 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:09:36,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:09:36,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1348361603, now seen corresponding path program 1 times [2018-10-24 18:09:36,827 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:09:36,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:36,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:09:36,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:36,828 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:09:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:09:37,185 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 18:09:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-10-24 18:09:37,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 18:09:37,348 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 18:09:37,349 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 234 with the following transitions: [2018-10-24 18:09:37,352 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [29], [31], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [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], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [762], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-10-24 18:09:37,430 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 18:09:37,430 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 18:09:40,020 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 18:10:08,474 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 18:10:08,476 INFO L272 AbstractInterpreter]: Visited 145 different actions 840 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-24 18:10:08,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:10:08,493 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 18:10:13,461 INFO L232 lantSequenceWeakener]: Weakened 8 states. On average, predicates are now at 78.25% of their original sizes. [2018-10-24 18:10:13,461 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 18:11:01,490 INFO L413 sIntCurrentIteration]: We have 232 unified AI predicates [2018-10-24 18:11:01,491 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 18:11:01,491 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 18:11:01,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [24] imperfect sequences [8] total 30 [2018-10-24 18:11:01,492 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:11:01,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-24 18:11:01,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-24 18:11:01,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2018-10-24 18:11:01,494 INFO L87 Difference]: Start difference. First operand 2051 states and 2708 transitions. Second operand 24 states. Received shutdown request... [2018-10-24 18:13:27,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-24 18:13:27,022 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 18:13:27,028 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 18:13:27,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 06:13:27 BoogieIcfgContainer [2018-10-24 18:13:27,029 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 18:13:27,030 INFO L168 Benchmark]: Toolchain (without parser) took 247349.31 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -876.2 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-10-24 18:13:27,031 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 18:13:27,032 INFO L168 Benchmark]: CACSL2BoogieTranslator took 778.72 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2018-10-24 18:13:27,033 INFO L168 Benchmark]: Boogie Procedure Inliner took 240.25 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 704.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -788.4 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. [2018-10-24 18:13:27,034 INFO L168 Benchmark]: Boogie Preprocessor took 112.82 ms. Allocated memory is still 2.2 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 18:13:27,034 INFO L168 Benchmark]: RCFGBuilder took 3533.59 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 133.6 MB). Peak memory consumption was 133.6 MB. Max. memory is 7.1 GB. [2018-10-24 18:13:27,038 INFO L168 Benchmark]: TraceAbstraction took 242678.82 ms. Allocated memory was 2.2 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.0 GB in the beginning and 2.3 GB in the end (delta: -253.1 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-10-24 18:13:27,045 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 778.72 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 240.25 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 704.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -788.4 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.82 ms. Allocated memory is still 2.2 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 3533.59 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 133.6 MB). Peak memory consumption was 133.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 242678.82 ms. Allocated memory was 2.2 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.0 GB in the beginning and 2.3 GB in the end (delta: -253.1 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 31]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 31). Cancelled while BasicCegarLoop was constructing difference of abstraction (2051states) and FLOYD_HOARE automaton (currently 26 states, 24 states before enhancement),while ReachableStatesComputation was computing reachable states (1332 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 216 locations, 1 error locations. TIMEOUT Result, 242.6s OverallTime, 6 OverallIterations, 3 TraceHistogramMax, 155.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 533 SDtfs, 4574 SDslu, 613 SDs, 0 SdLazy, 5898 SolverSat, 999 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 54.5s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 283 GetRequests, 187 SyntacticMatches, 39 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 51.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2051occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 31.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.9949166041979014 AbsIntWeakeningRatio, 0.11206896551724138 AbsIntAvgWeakeningVarsNumRemoved, 44.09051724137931 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 5 MinimizatonAttempts, 66 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 747 NumberOfCodeBlocks, 747 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 741 ConstructedInterpolants, 0 QuantifiedInterpolants, 626574 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 5 PerfectInterpolantSequences, 128/134 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown