./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loop-acceleration/underapprox_true-unreach-call1_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/loop-acceleration/underapprox_true-unreach-call1_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 6a0edfd90480f917557019c272eaa2ec2221428a --rcfgbuilder.size.of.a.code.block SingleStatement .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0210da8 [2018-10-22 09:49:48,883 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 09:49:48,885 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 09:49:48,902 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 09:49:48,902 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 09:49:48,905 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 09:49:48,906 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 09:49:48,908 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 09:49:48,911 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 09:49:48,913 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 09:49:48,914 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 09:49:48,914 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 09:49:48,915 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 09:49:48,916 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 09:49:48,917 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 09:49:48,918 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 09:49:48,919 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 09:49:48,921 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 09:49:48,923 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 09:49:48,925 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 09:49:48,926 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 09:49:48,927 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 09:49:48,930 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 09:49:48,930 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 09:49:48,930 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 09:49:48,931 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 09:49:48,932 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 09:49:48,933 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 09:49:48,934 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 09:49:48,935 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 09:49:48,935 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 09:49:48,937 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 09:49:48,937 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 09:49:48,937 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 09:49:48,938 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 09:49:48,939 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 09:49:48,939 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 09:49:48,954 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 09:49:48,955 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 09:49:48,956 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 09:49:48,956 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 09:49:48,956 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 09:49:48,956 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 09:49:48,956 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 09:49:48,957 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 09:49:48,957 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 09:49:48,958 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 09:49:48,958 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 09:49:48,958 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 09:49:48,958 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 09:49:48,959 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 09:49:48,959 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 09:49:48,960 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 09:49:48,960 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 09:49:48,960 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 09:49:48,960 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 09:49:48,960 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 09:49:48,960 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 09:49:48,961 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 09:49:48,962 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 09:49:48,962 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 09:49:48,962 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 09:49:48,962 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 09:49:48,962 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 09:49:48,963 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 09:49:48,963 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 09:49:48,963 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 09:49:48,963 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 09:49:48,963 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 09:49:48,963 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 09:49:48,964 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 09:49:48,965 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 -> 6a0edfd90480f917557019c272eaa2ec2221428a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement [2018-10-22 09:49:49,020 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 09:49:49,032 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 09:49:49,036 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 09:49:49,037 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 09:49:49,038 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 09:49:49,039 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_true-unreach-call1_true-termination.i [2018-10-22 09:49:49,094 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/921cc8110/027a2ee7f1e742b29ccfbc0cdd73f0b8/FLAGa4a9522a2 [2018-10-22 09:49:49,509 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 09:49:49,510 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_true-unreach-call1_true-termination.i [2018-10-22 09:49:49,516 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/921cc8110/027a2ee7f1e742b29ccfbc0cdd73f0b8/FLAGa4a9522a2 [2018-10-22 09:49:49,530 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/921cc8110/027a2ee7f1e742b29ccfbc0cdd73f0b8 [2018-10-22 09:49:49,537 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 09:49:49,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 09:49:49,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 09:49:49,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 09:49:49,544 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 09:49:49,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:49:49" (1/1) ... [2018-10-22 09:49:49,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@588fb1f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:49:49, skipping insertion in model container [2018-10-22 09:49:49,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:49:49" (1/1) ... [2018-10-22 09:49:49,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 09:49:49,578 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 09:49:49,776 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 09:49:49,781 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 09:49:49,800 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 09:49:49,818 INFO L193 MainTranslator]: Completed translation [2018-10-22 09:49:49,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:49:49 WrapperNode [2018-10-22 09:49:49,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 09:49:49,820 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 09:49:49,820 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 09:49:49,820 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 09:49:49,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:49:49" (1/1) ... [2018-10-22 09:49:49,837 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:49:49" (1/1) ... [2018-10-22 09:49:49,844 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 09:49:49,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 09:49:49,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 09:49:49,845 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 09:49:49,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:49:49" (1/1) ... [2018-10-22 09:49:49,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:49:49" (1/1) ... [2018-10-22 09:49:49,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:49:49" (1/1) ... [2018-10-22 09:49:49,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:49:49" (1/1) ... [2018-10-22 09:49:49,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:49:49" (1/1) ... [2018-10-22 09:49:49,872 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:49:49" (1/1) ... [2018-10-22 09:49:49,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:49:49" (1/1) ... [2018-10-22 09:49:49,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 09:49:49,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 09:49:49,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 09:49:49,876 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 09:49:49,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:49:49" (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 09:49:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 09:49:50,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 09:49:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 09:49:50,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 09:49:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 09:49:50,027 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 09:49:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 09:49:50,029 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 09:49:50,274 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 09:49:50,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:49:50 BoogieIcfgContainer [2018-10-22 09:49:50,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 09:49:50,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 09:49:50,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 09:49:50,280 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 09:49:50,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:49:49" (1/3) ... [2018-10-22 09:49:50,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f27d08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:49:50, skipping insertion in model container [2018-10-22 09:49:50,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:49:49" (2/3) ... [2018-10-22 09:49:50,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f27d08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:49:50, skipping insertion in model container [2018-10-22 09:49:50,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:49:50" (3/3) ... [2018-10-22 09:49:50,285 INFO L112 eAbstractionObserver]: Analyzing ICFG underapprox_true-unreach-call1_true-termination.i [2018-10-22 09:49:50,302 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 09:49:50,315 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 09:49:50,354 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 09:49:50,420 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 09:49:50,420 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 09:49:50,421 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 09:49:50,421 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 09:49:50,421 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 09:49:50,421 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 09:49:50,421 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 09:49:50,421 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 09:49:50,421 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 09:49:50,447 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-10-22 09:49:50,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 09:49:50,453 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:49:50,458 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:49:50,461 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:49:50,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:49:50,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1366875479, now seen corresponding path program 1 times [2018-10-22 09:49:50,469 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:49:50,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:49:50,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:49:50,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:49:50,513 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:49:50,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:49:50,569 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 09:49:50,571 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:49:50,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 09:49:50,572 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:49:50,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 09:49:50,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 09:49:50,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 09:49:50,594 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2018-10-22 09:49:50,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:49:50,617 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2018-10-22 09:49:50,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 09:49:50,619 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-10-22 09:49:50,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:49:50,633 INFO L225 Difference]: With dead ends: 34 [2018-10-22 09:49:50,633 INFO L226 Difference]: Without dead ends: 17 [2018-10-22 09:49:50,638 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 09:49:50,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-22 09:49:50,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-22 09:49:50,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-22 09:49:50,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-22 09:49:50,684 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2018-10-22 09:49:50,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:49:50,685 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-22 09:49:50,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 09:49:50,685 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-22 09:49:50,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-22 09:49:50,686 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:49:50,686 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:49:50,686 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:49:50,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:49:50,686 INFO L82 PathProgramCache]: Analyzing trace with hash 208492182, now seen corresponding path program 1 times [2018-10-22 09:49:50,688 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:49:50,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:49:50,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:49:50,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:49:50,689 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:49:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:49:50,872 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 09:49:50,872 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:49:50,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 09:49:50,872 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:49:50,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 09:49:50,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 09:49:50,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 09:49:50,878 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 3 states. [2018-10-22 09:49:50,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:49:50,991 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-22 09:49:50,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 09:49:50,993 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-10-22 09:49:50,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:49:50,995 INFO L225 Difference]: With dead ends: 26 [2018-10-22 09:49:50,995 INFO L226 Difference]: Without dead ends: 21 [2018-10-22 09:49:50,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 09:49:50,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-22 09:49:51,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2018-10-22 09:49:51,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-22 09:49:51,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-22 09:49:51,007 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 12 [2018-10-22 09:49:51,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:49:51,008 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-22 09:49:51,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 09:49:51,008 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-22 09:49:51,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-22 09:49:51,011 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:49:51,011 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:49:51,011 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:49:51,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:49:51,012 INFO L82 PathProgramCache]: Analyzing trace with hash -105647234, now seen corresponding path program 1 times [2018-10-22 09:49:51,012 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:49:51,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:49:51,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:49:51,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:49:51,016 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:49:51,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:49:51,175 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 09:49:51,176 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:49:51,176 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:49:51,177 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2018-10-22 09:49:51,179 INFO L202 CegarAbsIntRunner]: [0], [4], [5], [9], [13], [15], [16], [17], [18], [19], [25], [28], [30], [36], [37], [38], [40] [2018-10-22 09:49:51,246 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 09:49:51,248 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 09:49:51,365 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 09:49:51,897 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 09:49:51,898 INFO L272 AbstractInterpreter]: Visited 17 different actions 130 times. Merged at 7 different actions 75 times. Widened at 1 different actions 7 times. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2018-10-22 09:49:51,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:49:51,944 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 09:49:51,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:49:51,945 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 09:49:51,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:49:51,960 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:49:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:49:51,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:49:52,100 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 09:49:52,103 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:49:52,572 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 09:49:52,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:49:52,607 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 09:49:52,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:49:52,639 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:49:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:49:52,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:49:52,750 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 09:49:52,750 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:49:52,768 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 09:49:52,770 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:49:52,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 8 [2018-10-22 09:49:52,770 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:49:52,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 09:49:52,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 09:49:52,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-10-22 09:49:52,773 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 5 states. [2018-10-22 09:49:53,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:49:53,006 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-22 09:49:53,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 09:49:53,008 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2018-10-22 09:49:53,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:49:53,009 INFO L225 Difference]: With dead ends: 32 [2018-10-22 09:49:53,009 INFO L226 Difference]: Without dead ends: 27 [2018-10-22 09:49:53,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-22 09:49:53,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-22 09:49:53,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2018-10-22 09:49:53,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-22 09:49:53,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-22 09:49:53,018 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 18 [2018-10-22 09:49:53,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:49:53,020 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-22 09:49:53,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 09:49:53,021 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-22 09:49:53,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-22 09:49:53,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:49:53,024 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:49:53,024 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:49:53,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:49:53,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1757724058, now seen corresponding path program 2 times [2018-10-22 09:49:53,025 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:49:53,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:49:53,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:49:53,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:49:53,027 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:49:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:49:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:49:53,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:49:53,344 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:49:53,345 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:49:53,345 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:49:53,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:49:53,345 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 09:49:53,360 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 09:49:53,361 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:49:53,388 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 09:49:53,389 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:49:53,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:49:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:49:53,453 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:49:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:49:53,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:49:53,751 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 09:49:53,766 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 09:49:53,766 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:49:53,793 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 09:49:53,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:49:53,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:49:53,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:49:53,862 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:49:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 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 (5)] Exception during sending of exit command (exit): Broken pipe [2018-10-22 09:49:53,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:49:53,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 12 [2018-10-22 09:49:53,875 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:49:53,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 09:49:53,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 09:49:53,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-10-22 09:49:53,877 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 7 states. [2018-10-22 09:49:54,254 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-10-22 09:49:54,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:49:54,313 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-22 09:49:54,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 09:49:54,314 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2018-10-22 09:49:54,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:49:54,315 INFO L225 Difference]: With dead ends: 38 [2018-10-22 09:49:54,316 INFO L226 Difference]: Without dead ends: 33 [2018-10-22 09:49:54,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2018-10-22 09:49:54,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-22 09:49:54,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2018-10-22 09:49:54,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-22 09:49:54,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-22 09:49:54,324 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 24 [2018-10-22 09:49:54,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:49:54,325 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-22 09:49:54,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 09:49:54,325 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-22 09:49:54,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-22 09:49:54,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:49:54,326 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:49:54,326 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:49:54,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:49:54,327 INFO L82 PathProgramCache]: Analyzing trace with hash -902446258, now seen corresponding path program 3 times [2018-10-22 09:49:54,327 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:49:54,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:49:54,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:49:54,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:49:54,328 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:49:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:49:54,564 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:49:54,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:49:54,565 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:49:54,565 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:49:54,565 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:49:54,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:49:54,566 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 09:49:54,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 09:49:54,579 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 09:49:54,593 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 09:49:54,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:49:54,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:49:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:49:54,620 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:49:54,853 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:49:54,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:49:54,884 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 09:49:54,910 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 09:49:54,911 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 09:49:54,954 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 09:49:54,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:49:54,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:49:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:49:54,980 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:49:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:49:55,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:49:55,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 16 [2018-10-22 09:49:55,006 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:49:55,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 09:49:55,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 09:49:55,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-10-22 09:49:55,008 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 9 states. [2018-10-22 09:49:55,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:49:55,291 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-22 09:49:55,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 09:49:55,292 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2018-10-22 09:49:55,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:49:55,294 INFO L225 Difference]: With dead ends: 44 [2018-10-22 09:49:55,294 INFO L226 Difference]: Without dead ends: 39 [2018-10-22 09:49:55,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2018-10-22 09:49:55,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-22 09:49:55,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-10-22 09:49:55,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-22 09:49:55,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-22 09:49:55,301 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 30 [2018-10-22 09:49:55,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:49:55,301 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-22 09:49:55,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 09:49:55,302 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-22 09:49:55,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-22 09:49:55,303 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:49:55,303 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:49:55,303 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:49:55,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:49:55,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1744172598, now seen corresponding path program 4 times [2018-10-22 09:49:55,304 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:49:55,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:49:55,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:49:55,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:49:55,305 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:49:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:49:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:49:55,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:49:55,607 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:49:55,607 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:49:55,608 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:49:55,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:49:55,608 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 09:49:55,618 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 09:49:55,618 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 09:49:55,647 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 09:49:55,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:49:55,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:49:55,667 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:49:55,668 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:49:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:49:55,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:49:55,986 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 09:49:56,002 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 09:49:56,002 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 09:49:56,035 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 09:49:56,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:49:56,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:49:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:49:56,379 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:49:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:49:59,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:49:59,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 9, 9] total 34 [2018-10-22 09:49:59,136 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:49:59,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 09:49:59,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 09:49:59,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 09:49:59,137 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 11 states. [2018-10-22 09:49:59,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:49:59,474 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-22 09:49:59,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 09:49:59,475 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2018-10-22 09:49:59,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:49:59,477 INFO L225 Difference]: With dead ends: 50 [2018-10-22 09:49:59,477 INFO L226 Difference]: Without dead ends: 45 [2018-10-22 09:49:59,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=213, Invalid=1509, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 09:49:59,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-22 09:49:59,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2018-10-22 09:49:59,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-22 09:49:59,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-22 09:49:59,485 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 36 [2018-10-22 09:49:59,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:49:59,487 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-22 09:49:59,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 09:49:59,490 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-22 09:49:59,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-22 09:49:59,492 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:49:59,492 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:49:59,492 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:49:59,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:49:59,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1645323490, now seen corresponding path program 5 times [2018-10-22 09:49:59,494 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:49:59,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:49:59,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:49:59,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:49:59,495 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:49:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:49:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:49:59,695 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:49:59,695 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:49:59,695 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:49:59,696 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:49:59,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:49:59,696 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 09:49:59,704 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 09:49:59,705 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:49:59,727 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 09:49:59,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:49:59,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:49:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:49:59,768 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:50:00,128 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:50:00,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:50:00,149 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 11 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 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:50:00,164 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 09:50:00,164 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:50:00,222 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 09:50:00,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:50:00,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:50:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:50:00,263 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:50:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:50:00,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:50:00,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13] total 24 [2018-10-22 09:50:00,275 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:50:00,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 09:50:00,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 09:50:00,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2018-10-22 09:50:00,278 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 13 states. [2018-10-22 09:50:00,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:50:00,769 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-22 09:50:00,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 09:50:00,770 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2018-10-22 09:50:00,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:50:00,772 INFO L225 Difference]: With dead ends: 56 [2018-10-22 09:50:00,772 INFO L226 Difference]: Without dead ends: 51 [2018-10-22 09:50:00,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 09:50:00,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-22 09:50:00,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2018-10-22 09:50:00,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-22 09:50:00,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-22 09:50:00,779 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 42 [2018-10-22 09:50:00,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:50:00,779 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-22 09:50:00,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 09:50:00,779 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-22 09:50:00,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-22 09:50:00,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:50:00,781 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:50:00,781 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:50:00,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:50:00,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1504801286, now seen corresponding path program 6 times [2018-10-22 09:50:00,781 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:50:00,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:50:00,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:50:00,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:50:00,782 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:50:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:50:09,168 WARN L179 SmtUtils]: Spent 2.21 s on a formula simplification that was a NOOP. DAG size: 9 [2018-10-22 09:50:17,589 WARN L179 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 9 [2018-10-22 09:50:44,538 WARN L179 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 9 [2018-10-22 09:50:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 68 refuted. 34 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:50:47,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:50:47,487 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:50:47,487 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:50:47,487 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:50:47,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:50:47,488 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 09:50:47,504 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 09:50:47,505 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 09:50:47,533 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 09:50:47,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:50:47,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:51:11,279 WARN L179 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 23 [2018-10-22 09:51:15,031 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:51:15,031 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:52:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:52:33,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:52:33,768 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 13 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 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:52:33,783 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 09:52:33,784 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 09:52:33,873 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 09:52:33,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:52:33,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:52:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:52:40,587 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:52:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:52:42,745 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:52:42,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11] total 26 [2018-10-22 09:52:42,745 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:52:42,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 09:52:42,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 09:52:42,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=478, Unknown=55, NotChecked=0, Total=650 [2018-10-22 09:52:42,747 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 19 states. [2018-10-22 09:52:43,768 WARN L179 SmtUtils]: Spent 720.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-10-22 09:52:45,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:52:45,809 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-22 09:52:45,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 09:52:45,810 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2018-10-22 09:52:45,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:52:45,811 INFO L225 Difference]: With dead ends: 64 [2018-10-22 09:52:45,811 INFO L226 Difference]: Without dead ends: 59 [2018-10-22 09:52:45,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 171 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 162.1s TimeCoverageRelationStatistics Valid=123, Invalid=524, Unknown=55, NotChecked=0, Total=702 [2018-10-22 09:52:45,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-22 09:52:45,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-10-22 09:52:45,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-22 09:52:45,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-22 09:52:45,819 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 48 [2018-10-22 09:52:45,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:52:45,827 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-22 09:52:45,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 09:52:45,827 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-22 09:52:45,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-22 09:52:45,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:52:45,830 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:52:45,831 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:52:45,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:52:45,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1326335250, now seen corresponding path program 7 times [2018-10-22 09:52:45,831 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:52:45,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:52:45,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:52:45,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:52:45,834 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:52:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:52:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 38 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:52:46,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:52:46,431 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:52:46,431 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:52:46,431 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:52:46,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:52:46,431 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 09:52:46,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:52:46,442 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:52:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:52:46,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:52:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 38 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:52:46,477 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:52:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 38 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:52:46,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:52:46,914 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 15 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 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:52:46,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:52:46,929 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:52:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:52:46,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:52:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 38 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:52:47,005 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:52:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 38 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:52:47,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:52:47,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 15] total 28 [2018-10-22 09:52:47,063 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:52:47,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 09:52:47,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 09:52:47,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2018-10-22 09:52:47,064 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 15 states. [2018-10-22 09:52:47,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:52:47,773 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-22 09:52:47,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-22 09:52:47,774 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2018-10-22 09:52:47,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:52:47,774 INFO L225 Difference]: With dead ends: 55 [2018-10-22 09:52:47,775 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 09:52:47,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=240, Invalid=1320, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 09:52:47,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 09:52:47,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 09:52:47,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 09:52:47,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 09:52:47,776 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2018-10-22 09:52:47,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:52:47,776 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 09:52:47,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 09:52:47,777 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 09:52:47,777 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 09:52:47,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 09:52:47,888 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-22 09:52:47,888 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-22 09:52:47,888 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 09:52:47,888 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-22 09:52:47,888 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-22 09:52:47,888 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 09:52:47,889 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 8 16) the Hoare annotation is: true [2018-10-22 09:52:47,889 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 8 16) no Hoare annotation was computed. [2018-10-22 09:52:47,889 INFO L425 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-10-22 09:52:47,889 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 8 16) no Hoare annotation was computed. [2018-10-22 09:52:47,889 INFO L425 ceAbstractionStarter]: For program point L12(line 12) no Hoare annotation was computed. [2018-10-22 09:52:47,889 INFO L425 ceAbstractionStarter]: For program point L12-1(line 12) no Hoare annotation was computed. [2018-10-22 09:52:47,889 INFO L425 ceAbstractionStarter]: For program point L10(line 10) no Hoare annotation was computed. [2018-10-22 09:52:47,889 INFO L425 ceAbstractionStarter]: For program point L11-1(lines 11 14) no Hoare annotation was computed. [2018-10-22 09:52:47,889 INFO L425 ceAbstractionStarter]: For program point L12-2(line 12) no Hoare annotation was computed. [2018-10-22 09:52:47,890 INFO L421 ceAbstractionStarter]: At program point L11-3(lines 11 14) the Hoare annotation is: (or (and (exists ((v_main_~y~0_50 Int)) (and (<= v_main_~y~0_50 1) (<= 1 v_main_~y~0_50) (= (* 2 v_main_~y~0_50) main_~y~0))) (<= main_~x~0 1) (<= 1 main_~x~0)) (and (<= main_~x~0 3) (exists ((v_main_~y~0_50 Int)) (and (<= v_main_~y~0_50 1) (<= 1 v_main_~y~0_50) (= (* 8 v_main_~y~0_50) main_~y~0))) (<= 3 main_~x~0)) (and (exists ((v_main_~y~0_50 Int)) (and (= main_~y~0 (* 32 v_main_~y~0_50)) (<= v_main_~y~0_50 1) (<= 1 v_main_~y~0_50))) (<= 5 main_~x~0) (<= main_~x~0 5)) (and (exists ((v_main_~y~0_50 Int)) (and (<= v_main_~y~0_50 1) (<= 1 v_main_~y~0_50) (= main_~y~0 (* 16 v_main_~y~0_50)))) (<= 4 main_~x~0) (<= main_~x~0 4)) (and (<= 2 main_~x~0) (exists ((v_main_~y~0_50 Int)) (and (<= v_main_~y~0_50 1) (<= 1 v_main_~y~0_50) (= (* 4 v_main_~y~0_50) main_~y~0))) (<= main_~x~0 2)) (and (<= 1 main_~y~0) (<= main_~x~0 0) (<= main_~y~0 1) (<= 0 main_~x~0)) (and (<= main_~x~0 6) (exists ((v_main_~y~0_50 Int)) (and (<= v_main_~y~0_50 1) (<= 1 v_main_~y~0_50) (= main_~y~0 (* 64 v_main_~y~0_50)))) (<= 6 main_~x~0))) [2018-10-22 09:52:47,890 INFO L421 ceAbstractionStarter]: At program point L11-4(lines 11 14) the Hoare annotation is: (exists ((v_main_~y~0_50 Int)) (and (<= v_main_~y~0_50 1) (<= 1 v_main_~y~0_50) (= main_~y~0 (* 64 v_main_~y~0_50)))) [2018-10-22 09:52:47,890 INFO L425 ceAbstractionStarter]: For program point L3-2(lines 2 7) no Hoare annotation was computed. [2018-10-22 09:52:47,890 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 2 7) the Hoare annotation is: true [2018-10-22 09:52:47,890 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 2 7) no Hoare annotation was computed. [2018-10-22 09:52:47,890 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2018-10-22 09:52:47,890 INFO L425 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2018-10-22 09:52:47,891 INFO L425 ceAbstractionStarter]: For program point L3(lines 3 5) no Hoare annotation was computed. [2018-10-22 09:52:47,897 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,898 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,898 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,898 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,898 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,899 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,899 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,899 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,899 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,899 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,900 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,900 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,900 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,900 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,900 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,901 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,901 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,901 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,913 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,913 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,913 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,914 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,914 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,914 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,914 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,914 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,914 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,915 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,915 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,915 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,915 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,915 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,916 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,916 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,916 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,916 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:47,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:52:47 BoogieIcfgContainer [2018-10-22 09:52:47,919 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 09:52:47,919 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 09:52:47,919 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 09:52:47,920 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 09:52:47,920 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:49:50" (3/4) ... [2018-10-22 09:52:47,923 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-22 09:52:47,929 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-22 09:52:47,930 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-22 09:52:47,930 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-22 09:52:47,934 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-10-22 09:52:47,934 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-10-22 09:52:47,934 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-22 09:52:47,964 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((\exists v_main_~y~0_50 : int :: (v_main_~y~0_50 <= 1 && 1 <= v_main_~y~0_50) && 2 * v_main_~y~0_50 == y) && x <= 1) && 1 <= x) || ((x <= 3 && (\exists v_main_~y~0_50 : int :: (v_main_~y~0_50 <= 1 && 1 <= v_main_~y~0_50) && 8 * v_main_~y~0_50 == y)) && 3 <= x)) || (((\exists v_main_~y~0_50 : int :: (y == 32 * v_main_~y~0_50 && v_main_~y~0_50 <= 1) && 1 <= v_main_~y~0_50) && 5 <= x) && x <= 5)) || (((\exists v_main_~y~0_50 : int :: (v_main_~y~0_50 <= 1 && 1 <= v_main_~y~0_50) && y == 16 * v_main_~y~0_50) && 4 <= x) && x <= 4)) || ((2 <= x && (\exists v_main_~y~0_50 : int :: (v_main_~y~0_50 <= 1 && 1 <= v_main_~y~0_50) && 4 * v_main_~y~0_50 == y)) && x <= 2)) || (((1 <= y && x <= 0) && y <= 1) && 0 <= x)) || ((x <= 6 && (\exists v_main_~y~0_50 : int :: (v_main_~y~0_50 <= 1 && 1 <= v_main_~y~0_50) && y == 64 * v_main_~y~0_50)) && 6 <= x) [2018-10-22 09:52:47,985 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 09:52:47,985 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 09:52:47,986 INFO L168 Benchmark]: Toolchain (without parser) took 178449.10 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 273.7 MB). Free memory was 953.2 MB in the beginning and 1.0 GB in the end (delta: -66.0 MB). Peak memory consumption was 207.7 MB. Max. memory is 11.5 GB. [2018-10-22 09:52:47,989 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 09:52:47,993 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.22 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-22 09:52:47,996 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.46 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:52:47,997 INFO L168 Benchmark]: Boogie Preprocessor took 30.32 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:52:47,998 INFO L168 Benchmark]: RCFGBuilder took 399.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.2 MB). Free memory was 942.5 MB in the beginning and 1.1 GB in the end (delta: -206.8 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. [2018-10-22 09:52:47,999 INFO L168 Benchmark]: TraceAbstraction took 177642.83 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 108.5 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 130.1 MB). Peak memory consumption was 238.7 MB. Max. memory is 11.5 GB. [2018-10-22 09:52:48,001 INFO L168 Benchmark]: Witness Printer took 66.15 ms. Allocated memory is still 1.3 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:52:48,006 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 280.22 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.5 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 24.46 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 30.32 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 399.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.2 MB). Free memory was 942.5 MB in the beginning and 1.1 GB in the end (delta: -206.8 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 177642.83 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 108.5 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 130.1 MB). Peak memory consumption was 238.7 MB. Max. memory is 11.5 GB. * Witness Printer took 66.15 ms. Allocated memory is still 1.3 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] * 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: 11]: Loop Invariant [2018-10-22 09:52:48,015 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,015 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,015 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,015 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,015 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,016 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,018 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,018 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,018 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,018 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,018 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,019 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,019 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,019 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,019 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,019 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,019 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,019 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,020 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,020 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,021 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,030 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,030 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,030 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,030 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,031 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,031 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,031 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,031 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,031 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,031 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,032 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,037 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,037 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,037 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] [2018-10-22 09:52:48,037 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_50,QUANTIFIED] Derived loop invariant: ((((((((\exists v_main_~y~0_50 : int :: (v_main_~y~0_50 <= 1 && 1 <= v_main_~y~0_50) && 2 * v_main_~y~0_50 == y) && x <= 1) && 1 <= x) || ((x <= 3 && (\exists v_main_~y~0_50 : int :: (v_main_~y~0_50 <= 1 && 1 <= v_main_~y~0_50) && 8 * v_main_~y~0_50 == y)) && 3 <= x)) || (((\exists v_main_~y~0_50 : int :: (y == 32 * v_main_~y~0_50 && v_main_~y~0_50 <= 1) && 1 <= v_main_~y~0_50) && 5 <= x) && x <= 5)) || (((\exists v_main_~y~0_50 : int :: (v_main_~y~0_50 <= 1 && 1 <= v_main_~y~0_50) && y == 16 * v_main_~y~0_50) && 4 <= x) && x <= 4)) || ((2 <= x && (\exists v_main_~y~0_50 : int :: (v_main_~y~0_50 <= 1 && 1 <= v_main_~y~0_50) && 4 * v_main_~y~0_50 == y)) && x <= 2)) || (((1 <= y && x <= 0) && y <= 1) && 0 <= x)) || ((x <= 6 && (\exists v_main_~y~0_50 : int :: (v_main_~y~0_50 <= 1 && 1 <= v_main_~y~0_50) && y == 64 * v_main_~y~0_50)) && 6 <= x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. SAFE Result, 177.4s OverallTime, 9 OverallIterations, 8 TraceHistogramMax, 5.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 218 SDtfs, 38 SDslu, 1564 SDs, 0 SdLazy, 948 SolverSat, 21 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1114 GetRequests, 918 SyntacticMatches, 18 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 170.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.7s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 16 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 15 PreInvPairs, 23 NumberOfFragments, 152 HoareAnnotationTreeSize, 15 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 169.4s InterpolantComputationTime, 779 NumberOfCodeBlocks, 779 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 1246 ConstructedInterpolants, 70 QuantifiedInterpolants, 324525 SizeOfPredicates, 93 NumberOfNonLiveVariables, 854 ConjunctsInSsa, 241 ConjunctsInUnsatCore, 37 InterpolantComputations, 2 PerfectInterpolantSequences, 190/1960 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...