./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loops/n.c11_true-unreach-call_false-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8c3fbe1c 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/n.c11_true-unreach-call_false-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 24b22c477e8a47eac290a2fc1c5b1e1aaa3a4fa4 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:01:03,900 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:01:03,902 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:01:03,914 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:01:03,914 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:01:03,916 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:01:03,923 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:01:03,925 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:01:03,927 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:01:03,928 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:01:03,929 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:01:03,929 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:01:03,931 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:01:03,931 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:01:03,933 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:01:03,934 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:01:03,934 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:01:03,936 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:01:03,939 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:01:03,940 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:01:03,941 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:01:03,943 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:01:03,945 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 15:01:03,946 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 15:01:03,946 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 15:01:03,947 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 15:01:03,948 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 15:01:03,949 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 15:01:03,950 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 15:01:03,951 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 15:01:03,952 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 15:01:03,952 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 15:01:03,953 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 15:01:03,953 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 15:01:03,954 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 15:01:03,955 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 15:01:03,956 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 15:01:03,971 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:01:03,972 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:01:03,973 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:01:03,973 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 15:01:03,973 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 15:01:03,973 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 15:01:03,973 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 15:01:03,974 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 15:01:03,974 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 15:01:03,974 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 15:01:03,974 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 15:01:03,976 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:01:03,976 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 15:01:03,976 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:01:03,977 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 15:01:03,977 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:01:03,977 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:01:03,977 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:01:03,977 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:01:03,978 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 15:01:03,979 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:01:03,979 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:01:03,979 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:01:03,979 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:01:03,979 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:01:03,980 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:01:03,980 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:01:03,981 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:01:03,981 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:01:03,981 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:01:03,981 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 15:01:03,981 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:01:03,982 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:01:03,983 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:01:03,983 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 -> 24b22c477e8a47eac290a2fc1c5b1e1aaa3a4fa4 [2018-10-22 15:01:04,044 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:01:04,059 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:01:04,063 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:01:04,065 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:01:04,065 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:01:04,066 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/n.c11_true-unreach-call_false-termination.i [2018-10-22 15:01:04,138 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/03c5997f8/9c11e8ee963645faa54e2f2884b439e2/FLAG7e2c91e3d [2018-10-22 15:01:04,612 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:01:04,615 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c11_true-unreach-call_false-termination.i [2018-10-22 15:01:04,622 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/03c5997f8/9c11e8ee963645faa54e2f2884b439e2/FLAG7e2c91e3d [2018-10-22 15:01:04,643 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/03c5997f8/9c11e8ee963645faa54e2f2884b439e2 [2018-10-22 15:01:04,648 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:01:04,651 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 15:01:04,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:01:04,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:01:04,663 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:01:04,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:01:04" (1/1) ... [2018-10-22 15:01:04,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6734f092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:01:04, skipping insertion in model container [2018-10-22 15:01:04,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:01:04" (1/1) ... [2018-10-22 15:01:04,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:01:04,708 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:01:04,940 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:01:04,945 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:01:04,970 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:01:04,991 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:01:04,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:01:04 WrapperNode [2018-10-22 15:01:04,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:01:04,993 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:01:04,993 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:01:04,993 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:01:05,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:01:04" (1/1) ... [2018-10-22 15:01:05,013 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:01:04" (1/1) ... [2018-10-22 15:01:05,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:01:05,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:01:05,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:01:05,022 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:01:05,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:01:04" (1/1) ... [2018-10-22 15:01:05,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:01:04" (1/1) ... [2018-10-22 15:01:05,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:01:04" (1/1) ... [2018-10-22 15:01:05,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:01:04" (1/1) ... [2018-10-22 15:01:05,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:01:04" (1/1) ... [2018-10-22 15:01:05,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:01:04" (1/1) ... [2018-10-22 15:01:05,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:01:04" (1/1) ... [2018-10-22 15:01:05,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:01:05,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:01:05,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:01:05,062 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:01:05,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:01:04" (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 15:01:05,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 15:01:05,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 15:01:05,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:01:05,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:01:05,211 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 15:01:05,211 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 15:01:05,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 15:01:05,212 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 15:01:05,682 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:01:05,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:01:05 BoogieIcfgContainer [2018-10-22 15:01:05,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:01:05,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:01:05,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:01:05,693 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:01:05,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:01:04" (1/3) ... [2018-10-22 15:01:05,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@226b8ad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:01:05, skipping insertion in model container [2018-10-22 15:01:05,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:01:04" (2/3) ... [2018-10-22 15:01:05,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@226b8ad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:01:05, skipping insertion in model container [2018-10-22 15:01:05,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:01:05" (3/3) ... [2018-10-22 15:01:05,703 INFO L112 eAbstractionObserver]: Analyzing ICFG n.c11_true-unreach-call_false-termination.i [2018-10-22 15:01:05,722 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:01:05,742 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:01:05,768 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:01:05,818 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:01:05,819 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:01:05,819 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:01:05,819 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:01:05,820 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:01:05,820 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:01:05,820 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:01:05,820 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:01:05,820 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:01:05,864 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-10-22 15:01:05,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 15:01:05,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:01:05,871 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:01:05,877 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:01:05,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:01:05,891 INFO L82 PathProgramCache]: Analyzing trace with hash -2008095039, now seen corresponding path program 1 times [2018-10-22 15:01:05,893 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:01:05,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:01:05,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:01:05,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:01:05,942 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:01:05,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:01:05,997 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 15:01:05,999 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:01:05,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:01:06,000 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:01:06,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:01:06,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:01:06,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:01:06,024 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-10-22 15:01:06,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:01:06,048 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-10-22 15:01:06,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:01:06,050 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-22 15:01:06,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:01:06,059 INFO L225 Difference]: With dead ends: 33 [2018-10-22 15:01:06,060 INFO L226 Difference]: Without dead ends: 14 [2018-10-22 15:01:06,066 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 15:01:06,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-22 15:01:06,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-22 15:01:06,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-22 15:01:06,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-10-22 15:01:06,105 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-10-22 15:01:06,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:01:06,106 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-10-22 15:01:06,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:01:06,107 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-10-22 15:01:06,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 15:01:06,107 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:01:06,107 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:01:06,108 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:01:06,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:01:06,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1715940768, now seen corresponding path program 1 times [2018-10-22 15:01:06,109 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:01:06,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:01:06,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:01:06,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:01:06,112 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:01:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:01:06,246 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 15:01:06,246 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:01:06,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 15:01:06,247 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:01:06,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:01:06,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:01:06,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:01:06,250 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2018-10-22 15:01:06,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:01:06,359 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2018-10-22 15:01:06,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:01:06,360 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-22 15:01:06,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:01:06,361 INFO L225 Difference]: With dead ends: 30 [2018-10-22 15:01:06,361 INFO L226 Difference]: Without dead ends: 18 [2018-10-22 15:01:06,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:01:06,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-22 15:01:06,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-22 15:01:06,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-22 15:01:06,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-22 15:01:06,373 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2018-10-22 15:01:06,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:01:06,374 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-22 15:01:06,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:01:06,374 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-22 15:01:06,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-22 15:01:06,376 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:01:06,376 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:01:06,377 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:01:06,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:01:06,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1048902920, now seen corresponding path program 1 times [2018-10-22 15:01:06,378 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:01:06,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:01:06,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:01:06,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:01:06,381 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:01:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:01:06,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:01:06,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:01:06,538 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:01:06,538 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-10-22 15:01:06,541 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [14], [19], [21], [28], [31], [33], [39], [40], [41], [43] [2018-10-22 15:01:06,593 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 15:01:06,593 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 15:01:06,703 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 15:01:07,029 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 15:01:07,031 INFO L272 AbstractInterpreter]: Visited 14 different actions 122 times. Merged at 5 different actions 60 times. Widened at 1 different actions 8 times. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-10-22 15:01:07,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:01:07,047 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 15:01:07,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:01:07,047 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:01:07,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:01:07,066 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:01:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:01:07,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:01:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:01:07,171 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:01:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:01:07,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:01:07,692 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:01:07,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:01:07,711 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:01:07,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:01:07,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:01:07,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:01:07,784 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:01:07,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:01:07,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:01:07,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 10 [2018-10-22 15:01:07,803 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:01:07,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 15:01:07,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 15:01:07,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:01:07,805 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 6 states. [2018-10-22 15:01:07,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:01:07,881 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2018-10-22 15:01:07,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:01:07,882 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-10-22 15:01:07,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:01:07,884 INFO L225 Difference]: With dead ends: 34 [2018-10-22 15:01:07,884 INFO L226 Difference]: Without dead ends: 22 [2018-10-22 15:01:07,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:01:07,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-22 15:01:07,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-10-22 15:01:07,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-22 15:01:07,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-22 15:01:07,889 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2018-10-22 15:01:07,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:01:07,890 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-22 15:01:07,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 15:01:07,890 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-22 15:01:07,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-22 15:01:07,891 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:01:07,891 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:01:07,891 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:01:07,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:01:07,892 INFO L82 PathProgramCache]: Analyzing trace with hash 452778096, now seen corresponding path program 2 times [2018-10-22 15:01:07,892 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:01:07,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:01:07,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:01:07,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:01:07,894 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:01:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:01:08,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:01:08,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:01:08,139 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:01:08,139 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:01:08,140 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:01:08,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:01:08,140 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:01:08,158 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:01:08,159 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:01:08,180 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:01:08,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:01:08,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:01:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:01:08,313 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:01:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:01:08,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:01:08,492 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:01:08,508 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:01:08,508 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:01:08,534 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:01:08,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:01:08,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:01:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:01:08,754 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:01:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:01:08,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:01:08,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 12 [2018-10-22 15:01:08,814 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:01:08,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:01:08,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:01:08,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:01:08,815 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-10-22 15:01:08,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:01:08,946 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-10-22 15:01:08,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:01:08,947 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-10-22 15:01:08,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:01:08,948 INFO L225 Difference]: With dead ends: 42 [2018-10-22 15:01:08,948 INFO L226 Difference]: Without dead ends: 26 [2018-10-22 15:01:08,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:01:08,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-22 15:01:08,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-10-22 15:01:08,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-22 15:01:08,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-22 15:01:08,954 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2018-10-22 15:01:08,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:01:08,954 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-22 15:01:08,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:01:08,955 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-22 15:01:08,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-22 15:01:08,956 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:01:08,956 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:01:08,956 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:01:08,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:01:08,957 INFO L82 PathProgramCache]: Analyzing trace with hash -137838632, now seen corresponding path program 3 times [2018-10-22 15:01:08,957 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:01:08,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:01:08,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:01:08,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:01:08,958 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:01:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:01:09,143 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:01:09,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:01:09,144 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:01:09,144 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:01:09,144 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:01:09,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:01:09,144 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:01:09,154 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:01:09,154 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 15:01:09,189 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:01:09,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:01:09,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:01:09,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:01:09,272 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:01:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:01:09,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:01:09,560 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:01:09,576 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:01:09,576 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 15:01:09,625 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:01:09,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:01:09,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:01:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:01:09,679 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:01:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (7)] Exception during sending of exit command (exit): Broken pipe [2018-10-22 15:01:09,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:01:09,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 8, 8] total 17 [2018-10-22 15:01:09,748 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:01:09,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:01:09,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:01:09,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:01:09,751 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2018-10-22 15:01:09,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:01:09,902 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2018-10-22 15:01:09,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:01:09,906 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2018-10-22 15:01:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:01:09,907 INFO L225 Difference]: With dead ends: 50 [2018-10-22 15:01:09,907 INFO L226 Difference]: Without dead ends: 30 [2018-10-22 15:01:09,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:01:09,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-22 15:01:09,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-10-22 15:01:09,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-22 15:01:09,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-22 15:01:09,913 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 23 [2018-10-22 15:01:09,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:01:09,913 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-22 15:01:09,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:01:09,914 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-22 15:01:09,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-22 15:01:09,914 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:01:09,915 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:01:09,915 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:01:09,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:01:09,915 INFO L82 PathProgramCache]: Analyzing trace with hash 872592192, now seen corresponding path program 4 times [2018-10-22 15:01:09,915 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:01:09,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:01:09,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:01:09,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:01:09,917 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:01:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:01:10,239 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:01:10,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:01:10,241 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:01:10,241 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:01:10,242 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:01:10,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:01:10,242 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:01:10,258 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:01:10,258 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 15:01:10,279 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:01:10,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:01:10,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:01:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:01:10,360 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:01:10,480 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:01:10,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:01:10,501 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:01:10,517 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:01:10,517 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 15:01:10,554 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:01:10,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:01:10,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:01:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:01:10,589 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:01:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:01:10,618 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:01:10,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 16 [2018-10-22 15:01:10,618 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:01:10,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:01:10,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:01:10,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:01:10,620 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 9 states. [2018-10-22 15:01:10,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:01:10,739 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2018-10-22 15:01:10,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:01:10,740 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2018-10-22 15:01:10,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:01:10,740 INFO L225 Difference]: With dead ends: 48 [2018-10-22 15:01:10,741 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 15:01:10,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:01:10,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 15:01:10,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 15:01:10,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 15:01:10,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 15:01:10,742 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2018-10-22 15:01:10,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:01:10,743 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 15:01:10,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:01:10,743 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 15:01:10,743 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 15:01:10,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 15:01:10,851 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-22 15:01:10,851 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-22 15:01:10,851 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 15:01:10,851 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-22 15:01:10,852 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-22 15:01:10,852 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 15:01:10,852 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 9 21) the Hoare annotation is: true [2018-10-22 15:01:10,852 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 9 21) no Hoare annotation was computed. [2018-10-22 15:01:10,853 INFO L425 ceAbstractionStarter]: For program point L19(line 19) no Hoare annotation was computed. [2018-10-22 15:01:10,853 INFO L425 ceAbstractionStarter]: For program point L14(lines 14 15) no Hoare annotation was computed. [2018-10-22 15:01:10,853 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 9 21) no Hoare annotation was computed. [2018-10-22 15:01:10,853 INFO L425 ceAbstractionStarter]: For program point L13-1(lines 13 18) no Hoare annotation was computed. [2018-10-22 15:01:10,853 INFO L425 ceAbstractionStarter]: For program point L14-2(lines 14 15) no Hoare annotation was computed. [2018-10-22 15:01:10,854 INFO L421 ceAbstractionStarter]: At program point L13-3(lines 13 18) the Hoare annotation is: (or (and (<= main_~len~0 0) (<= 0 main_~len~0)) (and (<= 4 main_~len~0) (<= main_~len~0 4)) (and (<= main_~len~0 2) (<= 2 main_~len~0)) (and (<= 1 main_~len~0) (<= main_~len~0 1)) (and (<= main_~len~0 3) (<= 3 main_~len~0))) [2018-10-22 15:01:10,854 INFO L421 ceAbstractionStarter]: At program point L13-4(lines 13 18) the Hoare annotation is: (or (and (<= main_~len~0 0) (<= 0 main_~len~0)) (and (<= 4 main_~len~0) (<= main_~len~0 4)) (and (<= main_~len~0 2) (<= 2 main_~len~0)) (and (<= 1 main_~len~0) (<= main_~len~0 1)) (and (<= main_~len~0 3) (<= 3 main_~len~0))) [2018-10-22 15:01:10,854 INFO L425 ceAbstractionStarter]: For program point L3-2(lines 2 7) no Hoare annotation was computed. [2018-10-22 15:01:10,854 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 2 7) the Hoare annotation is: true [2018-10-22 15:01:10,854 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2018-10-22 15:01:10,854 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 2 7) no Hoare annotation was computed. [2018-10-22 15:01:10,855 INFO L425 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2018-10-22 15:01:10,855 INFO L425 ceAbstractionStarter]: For program point L3(lines 3 5) no Hoare annotation was computed. [2018-10-22 15:01:10,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:01:10 BoogieIcfgContainer [2018-10-22 15:01:10,870 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:01:10,870 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 15:01:10,870 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 15:01:10,871 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 15:01:10,871 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:01:05" (3/4) ... [2018-10-22 15:01:10,875 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-22 15:01:10,881 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-22 15:01:10,881 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-22 15:01:10,882 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-22 15:01:10,886 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-10-22 15:01:10,886 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-10-22 15:01:10,887 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-22 15:01:10,933 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 15:01:10,933 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 15:01:10,934 INFO L168 Benchmark]: Toolchain (without parser) took 6284.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.3 MB). Free memory was 950.5 MB in the beginning and 840.5 MB in the end (delta: 110.0 MB). Peak memory consumption was 257.3 MB. Max. memory is 11.5 GB. [2018-10-22 15:01:10,936 INFO L168 Benchmark]: CDTParser took 0.20 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 15:01:10,937 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.79 ms. Allocated memory is still 1.0 GB. Free memory was 950.5 MB in the beginning and 939.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-22 15:01:10,937 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.30 ms. Allocated memory is still 1.0 GB. Free memory is still 939.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 15:01:10,938 INFO L168 Benchmark]: Boogie Preprocessor took 38.99 ms. Allocated memory is still 1.0 GB. Free memory is still 939.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 15:01:10,938 INFO L168 Benchmark]: RCFGBuilder took 622.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.3 MB). Free memory was 939.7 MB in the beginning and 1.1 GB in the end (delta: -184.9 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. [2018-10-22 15:01:10,939 INFO L168 Benchmark]: TraceAbstraction took 5185.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 840.5 MB in the end (delta: 277.4 MB). Peak memory consumption was 277.4 MB. Max. memory is 11.5 GB. [2018-10-22 15:01:10,940 INFO L168 Benchmark]: Witness Printer took 62.78 ms. Allocated memory is still 1.2 GB. Free memory is still 840.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 15:01:10,944 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 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 339.79 ms. Allocated memory is still 1.0 GB. Free memory was 950.5 MB in the beginning and 939.7 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 28.30 ms. Allocated memory is still 1.0 GB. Free memory is still 939.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 38.99 ms. Allocated memory is still 1.0 GB. Free memory is still 939.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 622.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.3 MB). Free memory was 939.7 MB in the beginning and 1.1 GB in the end (delta: -184.9 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5185.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 840.5 MB in the end (delta: 277.4 MB). Peak memory consumption was 277.4 MB. Max. memory is 11.5 GB. * Witness Printer took 62.78 ms. Allocated memory is still 1.2 GB. Free memory is still 840.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((len <= 0 && 0 <= len) || (4 <= len && len <= 4)) || (len <= 2 && 2 <= len)) || (1 <= len && len <= 1)) || (len <= 3 && 3 <= len) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. SAFE Result, 5.0s OverallTime, 6 OverallIterations, 5 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 99 SDtfs, 14 SDslu, 336 SDs, 0 SdLazy, 220 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 370 GetRequests, 298 SyntacticMatches, 17 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.5s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 27 NumberOfFragments, 77 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 273 NumberOfCodeBlocks, 273 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 419 ConstructedInterpolants, 0 QuantifiedInterpolants, 45165 SizeOfPredicates, 16 NumberOfNonLiveVariables, 312 ConjunctsInSsa, 105 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 3/300 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...