./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loops/for_bounded_loop1_false-unreach-call_true-termination.i --full-output --rcfgbuilder.size.of.a.code.block SingleStatement --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0210da8c Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/config -Xmx12G -Xms1G -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 /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/TaipanReach.xml -i ../../../trunk/examples/svcomp/loops/for_bounded_loop1_false-unreach-call_true-termination.i -s /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UTaipan-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0ab550a6e9aa370752671d7ad69781384c889e75 --rcfgbuilder.size.of.a.code.block SingleStatement ...................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-0210da8 [2018-10-22 09:40:10,830 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 09:40:10,833 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 09:40:10,850 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 09:40:10,850 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 09:40:10,852 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 09:40:10,853 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 09:40:10,855 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 09:40:10,857 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 09:40:10,858 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 09:40:10,859 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 09:40:10,859 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 09:40:10,861 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 09:40:10,862 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 09:40:10,864 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 09:40:10,864 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 09:40:10,866 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 09:40:10,867 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 09:40:10,870 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 09:40:10,872 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 09:40:10,873 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 09:40:10,874 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 09:40:10,877 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 09:40:10,878 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 09:40:10,878 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 09:40:10,879 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 09:40:10,881 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 09:40:10,882 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 09:40:10,882 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 09:40:10,884 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 09:40:10,884 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 09:40:10,885 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 09:40:10,885 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 09:40:10,885 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 09:40:10,886 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 09:40:10,888 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 09:40:10,888 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 09:40:10,912 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 09:40:10,912 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 09:40:10,913 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 09:40:10,913 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 09:40:10,914 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 09:40:10,914 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 09:40:10,914 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 09:40:10,914 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 09:40:10,914 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 09:40:10,915 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 09:40:10,918 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 09:40:10,919 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 09:40:10,919 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 09:40:10,919 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 09:40:10,919 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 09:40:10,919 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 09:40:10,920 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 09:40:10,920 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 09:40:10,920 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 09:40:10,920 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 09:40:10,920 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 09:40:10,920 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 09:40:10,921 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 09:40:10,922 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 09:40:10,922 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 09:40:10,922 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 09:40:10,922 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 09:40:10,923 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 09:40:10,923 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 09:40:10,923 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 09:40:10,923 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 09:40:10,923 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 09:40:10,923 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 09:40:10,925 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 09:40:10,925 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UTaipan-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ab550a6e9aa370752671d7ad69781384c889e75 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement [2018-10-22 09:40:10,980 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 09:40:10,998 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 09:40:11,002 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 09:40:11,004 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 09:40:11,004 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 09:40:11,005 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1_false-unreach-call_true-termination.i [2018-10-22 09:40:11,081 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/65cfa49e3/7a805fde22dc407595f792e22df5500c/FLAG26f2869b7 [2018-10-22 09:40:11,507 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 09:40:11,508 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1_false-unreach-call_true-termination.i [2018-10-22 09:40:11,515 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/65cfa49e3/7a805fde22dc407595f792e22df5500c/FLAG26f2869b7 [2018-10-22 09:40:11,533 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/65cfa49e3/7a805fde22dc407595f792e22df5500c [2018-10-22 09:40:11,537 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 09:40:11,539 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 09:40:11,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 09:40:11,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 09:40:11,547 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 09:40:11,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:40:11" (1/1) ... [2018-10-22 09:40:11,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37cf9c37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:11, skipping insertion in model container [2018-10-22 09:40:11,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:40:11" (1/1) ... [2018-10-22 09:40:11,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 09:40:11,595 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 09:40:11,823 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 09:40:11,828 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 09:40:11,853 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 09:40:11,872 INFO L193 MainTranslator]: Completed translation [2018-10-22 09:40:11,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:11 WrapperNode [2018-10-22 09:40:11,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 09:40:11,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 09:40:11,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 09:40:11,874 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 09:40:11,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:11" (1/1) ... [2018-10-22 09:40:11,892 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:11" (1/1) ... [2018-10-22 09:40:11,899 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 09:40:11,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 09:40:11,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 09:40:11,901 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 09:40:11,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:11" (1/1) ... [2018-10-22 09:40:11,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:11" (1/1) ... [2018-10-22 09:40:11,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:11" (1/1) ... [2018-10-22 09:40:11,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:11" (1/1) ... [2018-10-22 09:40:11,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:11" (1/1) ... [2018-10-22 09:40:11,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:11" (1/1) ... [2018-10-22 09:40:11,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:11" (1/1) ... [2018-10-22 09:40:11,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 09:40:11,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 09:40:11,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 09:40:11,933 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 09:40:11,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:11" (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 [2018-10-22 09:40:12,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 09:40:12,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 09:40:12,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 09:40:12,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 09:40:12,080 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 09:40:12,080 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 09:40:12,080 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 09:40:12,080 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 09:40:12,457 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 09:40:12,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:40:12 BoogieIcfgContainer [2018-10-22 09:40:12,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 09:40:12,460 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 09:40:12,460 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 09:40:12,464 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 09:40:12,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:40:11" (1/3) ... [2018-10-22 09:40:12,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@226a95af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:40:12, skipping insertion in model container [2018-10-22 09:40:12,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:11" (2/3) ... [2018-10-22 09:40:12,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@226a95af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:40:12, skipping insertion in model container [2018-10-22 09:40:12,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:40:12" (3/3) ... [2018-10-22 09:40:12,471 INFO L112 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1_false-unreach-call_true-termination.i [2018-10-22 09:40:12,482 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 09:40:12,492 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 09:40:12,514 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 09:40:12,559 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 09:40:12,559 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 09:40:12,560 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 09:40:12,560 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 09:40:12,560 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 09:40:12,560 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 09:40:12,560 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 09:40:12,560 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 09:40:12,560 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 09:40:12,588 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2018-10-22 09:40:12,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-22 09:40:12,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:12,596 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:12,599 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:12,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:12,605 INFO L82 PathProgramCache]: Analyzing trace with hash 2043055308, now seen corresponding path program 1 times [2018-10-22 09:40:12,607 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:12,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:12,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:40:12,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:12,653 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:12,722 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:40:12,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 09:40:12,722 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:40:12,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 09:40:12,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 09:40:12,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 09:40:12,747 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 2 states. [2018-10-22 09:40:12,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:40:12,775 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2018-10-22 09:40:12,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 09:40:12,777 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-10-22 09:40:12,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:40:12,788 INFO L225 Difference]: With dead ends: 63 [2018-10-22 09:40:12,789 INFO L226 Difference]: Without dead ends: 32 [2018-10-22 09:40:12,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 09:40:12,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-22 09:40:12,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-22 09:40:12,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-22 09:40:12,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-10-22 09:40:12,839 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 17 [2018-10-22 09:40:12,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:40:12,840 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-10-22 09:40:12,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 09:40:12,840 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-10-22 09:40:12,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-22 09:40:12,842 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:12,842 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:12,843 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:12,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:12,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1787413633, now seen corresponding path program 1 times [2018-10-22 09:40:12,843 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:12,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:12,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:40:12,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:12,846 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:12,913 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:40:12,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-22 09:40:12,913 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:40:12,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 09:40:12,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 09:40:12,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 09:40:12,916 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 4 states. [2018-10-22 09:40:13,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:40:13,045 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-10-22 09:40:13,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 09:40:13,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2018-10-22 09:40:13,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:40:13,048 INFO L225 Difference]: With dead ends: 41 [2018-10-22 09:40:13,048 INFO L226 Difference]: Without dead ends: 34 [2018-10-22 09:40:13,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-22 09:40:13,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-22 09:40:13,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-22 09:40:13,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-22 09:40:13,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-10-22 09:40:13,062 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 18 [2018-10-22 09:40:13,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:40:13,062 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-10-22 09:40:13,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 09:40:13,063 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-10-22 09:40:13,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-22 09:40:13,064 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:13,064 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:13,064 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:13,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:13,067 INFO L82 PathProgramCache]: Analyzing trace with hash 445513658, now seen corresponding path program 1 times [2018-10-22 09:40:13,067 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:13,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:13,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:40:13,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:13,070 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:13,283 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:40:13,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-22 09:40:13,284 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:40:13,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 09:40:13,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 09:40:13,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-22 09:40:13,286 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 6 states. [2018-10-22 09:40:13,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:40:13,622 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-10-22 09:40:13,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 09:40:13,623 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-10-22 09:40:13,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:40:13,624 INFO L225 Difference]: With dead ends: 44 [2018-10-22 09:40:13,625 INFO L226 Difference]: Without dead ends: 42 [2018-10-22 09:40:13,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-22 09:40:13,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-22 09:40:13,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2018-10-22 09:40:13,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-22 09:40:13,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-10-22 09:40:13,637 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 19 [2018-10-22 09:40:13,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:40:13,637 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-10-22 09:40:13,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 09:40:13,638 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-10-22 09:40:13,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-22 09:40:13,639 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:13,639 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-22 09:40:13,640 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:13,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:13,640 INFO L82 PathProgramCache]: Analyzing trace with hash 2101011242, now seen corresponding path program 1 times [2018-10-22 09:40:13,640 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:13,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:13,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:40:13,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:13,643 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:14,050 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-22 09:40:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:14,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:14,101 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:40:14,102 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 30 with the following transitions: [2018-10-22 09:40:14,105 INFO L202 CegarAbsIntRunner]: [0], [4], [5], [6], [7], [8], [9], [14], [15], [19], [24], [25], [27], [28], [29], [34], [35], [46], [49], [51], [54], [56], [57], [58], [59], [61], [62], [63] [2018-10-22 09:40:14,157 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 09:40:14,157 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 09:40:14,359 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-22 09:40:14,361 INFO L272 AbstractInterpreter]: Visited 27 different actions 31 times. Never merged. Never widened. Never found a fixpoint. Largest state had 6 variables. [2018-10-22 09:40:14,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:14,411 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-22 09:40:14,557 INFO L232 lantSequenceWeakener]: Weakened 19 states. On average, predicates are now at 57.54% of their original sizes. [2018-10-22 09:40:14,557 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-22 09:40:15,419 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-22 09:40:15,422 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 09:40:15,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [9] total 21 [2018-10-22 09:40:15,423 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:40:15,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 09:40:15,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 09:40:15,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2018-10-22 09:40:15,428 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 14 states. [2018-10-22 09:40:16,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:40:16,315 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2018-10-22 09:40:16,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-22 09:40:16,315 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2018-10-22 09:40:16,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:40:16,318 INFO L225 Difference]: With dead ends: 63 [2018-10-22 09:40:16,318 INFO L226 Difference]: Without dead ends: 61 [2018-10-22 09:40:16,319 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2018-10-22 09:40:16,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-22 09:40:16,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2018-10-22 09:40:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-22 09:40:16,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-10-22 09:40:16,331 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 29 [2018-10-22 09:40:16,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:40:16,331 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-10-22 09:40:16,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 09:40:16,331 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-10-22 09:40:16,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-22 09:40:16,333 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:16,334 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:16,334 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:16,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:16,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1362911523, now seen corresponding path program 1 times [2018-10-22 09:40:16,335 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:16,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:16,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:40:16,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:16,337 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-22 09:40:16,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-22 09:40:16,405 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-22 09:40:16,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:40:16 BoogieIcfgContainer [2018-10-22 09:40:16,432 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 09:40:16,432 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 09:40:16,433 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 09:40:16,433 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 09:40:16,433 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:40:12" (3/4) ... [2018-10-22 09:40:16,436 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-10-22 09:40:16,487 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 09:40:16,487 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 09:40:16,488 INFO L168 Benchmark]: Toolchain (without parser) took 4950.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 953.2 MB in the beginning and 960.4 MB in the end (delta: -7.2 MB). Peak memory consumption was 135.9 MB. Max. memory is 11.5 GB. [2018-10-22 09:40:16,489 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:40:16,490 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.98 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-22 09:40:16,491 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.14 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:40:16,491 INFO L168 Benchmark]: Boogie Preprocessor took 31.52 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:40:16,492 INFO L168 Benchmark]: RCFGBuilder took 526.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -176.3 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. [2018-10-22 09:40:16,494 INFO L168 Benchmark]: TraceAbstraction took 3972.49 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 960.4 MB in the end (delta: 158.3 MB). Peak memory consumption was 158.3 MB. Max. memory is 11.5 GB. [2018-10-22 09:40:16,494 INFO L168 Benchmark]: Witness Printer took 54.50 ms. Allocated memory is still 1.2 GB. Free memory is still 960.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:40:16,499 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 332.98 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.14 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 31.52 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 526.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -176.3 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3972.49 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 960.4 MB in the end (delta: 158.3 MB). Peak memory consumption was 158.3 MB. Max. memory is 11.5 GB. * Witness Printer took 54.50 ms. Allocated memory is still 1.2 GB. Free memory is still 960.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int i=0, x=0, y=0; VAL [i=0, x=0, y=0] [L15] int n=__VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=1, i=0, n=1, x=0, y=0] [L16] COND FALSE !(!(n>0)) VAL [i=0, n=1, x=0, y=0] [L17] i=0 VAL [i=0, n=1, x=0, y=0] [L17] COND TRUE i