./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loop-invgen/apache-escape-absolute_true-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_ff07827a-c5e0-40b3-a656-a15a6756caa9/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_ff07827a-c5e0-40b3-a656-a15a6756caa9/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_ff07827a-c5e0-40b3-a656-a15a6756caa9/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_ff07827a-c5e0-40b3-a656-a15a6756caa9/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/apache-escape-absolute_true-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_ff07827a-c5e0-40b3-a656-a15a6756caa9/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_ff07827a-c5e0-40b3-a656-a15a6756caa9/bin-2019/utaipan --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 3607a70e53f56c4b4860f9fca9676a925474c3df ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 11:43:06,943 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 11:43:06,944 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 11:43:06,952 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 11:43:06,952 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 11:43:06,953 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 11:43:06,954 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 11:43:06,956 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 11:43:06,957 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 11:43:06,958 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 11:43:06,958 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 11:43:06,959 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 11:43:06,959 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 11:43:06,960 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 11:43:06,961 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 11:43:06,962 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 11:43:06,962 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 11:43:06,964 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 11:43:06,965 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 11:43:06,967 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 11:43:06,967 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 11:43:06,968 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 11:43:06,970 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 11:43:06,971 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 11:43:06,971 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 11:43:06,971 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 11:43:06,972 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 11:43:06,973 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 11:43:06,973 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 11:43:06,974 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 11:43:06,975 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 11:43:06,975 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 11:43:06,975 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 11:43:06,976 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 11:43:06,976 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 11:43:06,977 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 11:43:06,977 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_ff07827a-c5e0-40b3-a656-a15a6756caa9/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 11:43:06,988 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 11:43:06,988 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 11:43:06,989 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 11:43:06,989 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 11:43:06,990 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 11:43:06,990 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 11:43:06,990 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 11:43:06,990 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 11:43:06,990 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 11:43:06,990 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 11:43:06,991 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 11:43:06,991 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 11:43:06,991 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 11:43:06,991 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 11:43:06,992 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 11:43:06,992 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 11:43:06,992 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 11:43:06,992 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 11:43:06,992 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 11:43:06,992 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 11:43:06,993 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 11:43:06,993 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 11:43:06,993 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 11:43:06,993 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 11:43:06,993 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 11:43:06,993 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 11:43:06,994 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 11:43:06,994 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 11:43:06,994 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 11:43:06,994 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 11:43:06,994 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 11:43:06,994 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 11:43:06,994 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 11:43:06,995 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 11:43:06,995 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 11:43:06,995 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 11:43:06,995 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 11:43:06,995 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 -> /tmp/vcloud-vcloud-master/worker/working_dir_ff07827a-c5e0-40b3-a656-a15a6756caa9/bin-2019/utaipan 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 -> 3607a70e53f56c4b4860f9fca9676a925474c3df [2018-11-18 11:43:07,020 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 11:43:07,029 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 11:43:07,032 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 11:43:07,034 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 11:43:07,034 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 11:43:07,035 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_ff07827a-c5e0-40b3-a656-a15a6756caa9/bin-2019/utaipan/../../sv-benchmarks/c/loop-invgen/apache-escape-absolute_true-unreach-call_true-termination.i [2018-11-18 11:43:07,081 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ff07827a-c5e0-40b3-a656-a15a6756caa9/bin-2019/utaipan/data/f09f25fdf/3a03d52bf23040759d4d212e0294a193/FLAG3838d4f71 [2018-11-18 11:43:07,440 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 11:43:07,440 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_ff07827a-c5e0-40b3-a656-a15a6756caa9/sv-benchmarks/c/loop-invgen/apache-escape-absolute_true-unreach-call_true-termination.i [2018-11-18 11:43:07,447 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ff07827a-c5e0-40b3-a656-a15a6756caa9/bin-2019/utaipan/data/f09f25fdf/3a03d52bf23040759d4d212e0294a193/FLAG3838d4f71 [2018-11-18 11:43:07,857 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_ff07827a-c5e0-40b3-a656-a15a6756caa9/bin-2019/utaipan/data/f09f25fdf/3a03d52bf23040759d4d212e0294a193 [2018-11-18 11:43:07,859 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 11:43:07,860 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 11:43:07,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 11:43:07,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 11:43:07,864 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 11:43:07,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:43:07" (1/1) ... [2018-11-18 11:43:07,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47f35898 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:07, skipping insertion in model container [2018-11-18 11:43:07,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:43:07" (1/1) ... [2018-11-18 11:43:07,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 11:43:07,892 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 11:43:08,026 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:43:08,029 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 11:43:08,050 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:43:08,061 INFO L195 MainTranslator]: Completed translation [2018-11-18 11:43:08,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:08 WrapperNode [2018-11-18 11:43:08,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 11:43:08,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 11:43:08,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 11:43:08,063 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 11:43:08,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:08" (1/1) ... [2018-11-18 11:43:08,074 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:08" (1/1) ... [2018-11-18 11:43:08,080 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 11:43:08,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 11:43:08,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 11:43:08,081 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 11:43:08,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:08" (1/1) ... [2018-11-18 11:43:08,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:08" (1/1) ... [2018-11-18 11:43:08,088 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:08" (1/1) ... [2018-11-18 11:43:08,088 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:08" (1/1) ... [2018-11-18 11:43:08,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:08" (1/1) ... [2018-11-18 11:43:08,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:08" (1/1) ... [2018-11-18 11:43:08,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:08" (1/1) ... [2018-11-18 11:43:08,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 11:43:08,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 11:43:08,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 11:43:08,102 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 11:43:08,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ff07827a-c5e0-40b3-a656-a15a6756caa9/bin-2019/utaipan/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 [2018-11-18 11:43:08,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 11:43:08,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 11:43:08,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 11:43:08,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 11:43:08,193 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 11:43:08,193 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 11:43:08,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-18 11:43:08,194 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-18 11:43:08,396 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 11:43:08,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:43:08 BoogieIcfgContainer [2018-11-18 11:43:08,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 11:43:08,397 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 11:43:08,397 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 11:43:08,400 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 11:43:08,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 11:43:07" (1/3) ... [2018-11-18 11:43:08,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74846b97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 11:43:08, skipping insertion in model container [2018-11-18 11:43:08,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:08" (2/3) ... [2018-11-18 11:43:08,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74846b97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 11:43:08, skipping insertion in model container [2018-11-18 11:43:08,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:43:08" (3/3) ... [2018-11-18 11:43:08,403 INFO L112 eAbstractionObserver]: Analyzing ICFG apache-escape-absolute_true-unreach-call_true-termination.i [2018-11-18 11:43:08,413 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 11:43:08,417 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 11:43:08,427 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 11:43:08,451 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 11:43:08,451 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 11:43:08,451 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 11:43:08,451 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 11:43:08,451 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 11:43:08,452 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 11:43:08,452 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 11:43:08,452 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 11:43:08,465 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2018-11-18 11:43:08,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-18 11:43:08,470 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:43:08,470 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:43:08,472 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:43:08,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:43:08,476 INFO L82 PathProgramCache]: Analyzing trace with hash 398758246, now seen corresponding path program 1 times [2018-11-18 11:43:08,478 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:43:08,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:43:08,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:43:08,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:43:08,521 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:43:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:43:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:43:08,629 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:43:08,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 11:43:08,629 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 11:43:08,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 11:43:08,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 11:43:08,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 11:43:08,650 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 5 states. [2018-11-18 11:43:08,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:43:08,864 INFO L93 Difference]: Finished difference Result 116 states and 211 transitions. [2018-11-18 11:43:08,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 11:43:08,865 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-11-18 11:43:08,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:43:08,875 INFO L225 Difference]: With dead ends: 116 [2018-11-18 11:43:08,875 INFO L226 Difference]: Without dead ends: 66 [2018-11-18 11:43:08,879 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 11:43:08,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-18 11:43:08,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2018-11-18 11:43:08,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-18 11:43:08,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 82 transitions. [2018-11-18 11:43:08,925 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 82 transitions. Word has length 16 [2018-11-18 11:43:08,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:43:08,926 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 82 transitions. [2018-11-18 11:43:08,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 11:43:08,926 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 82 transitions. [2018-11-18 11:43:08,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-18 11:43:08,927 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:43:08,928 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:43:08,928 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:43:08,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:43:08,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1482520181, now seen corresponding path program 1 times [2018-11-18 11:43:08,929 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:43:08,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:43:08,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:43:08,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:43:08,930 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:43:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:43:08,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:43:08,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:43:08,989 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:43:08,990 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2018-11-18 11:43:08,992 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [19], [25], [31], [39], [122], [125], [127], [130], [132], [133], [134], [135], [137], [138], [139] [2018-11-18 11:43:09,016 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 11:43:09,017 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 11:43:09,119 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 11:43:09,120 INFO L272 AbstractInterpreter]: Visited 20 different actions 25 times. Never merged. Never widened. Performed 58 root evaluator evaluations with a maximum evaluation depth of 4. Performed 58 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Never found a fixpoint. Largest state had 8 variables. [2018-11-18 11:43:09,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:43:09,126 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 11:43:09,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:43:09,126 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ff07827a-c5e0-40b3-a656-a15a6756caa9/bin-2019/utaipan/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 [2018-11-18 11:43:09,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:43:09,133 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 11:43:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:43:09,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:43:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:43:09,192 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:43:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:43:09,248 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 11:43:09,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 9 [2018-11-18 11:43:09,249 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 11:43:09,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 11:43:09,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 11:43:09,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-11-18 11:43:09,250 INFO L87 Difference]: Start difference. First operand 59 states and 82 transitions. Second operand 6 states. [2018-11-18 11:43:09,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:43:09,406 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2018-11-18 11:43:09,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 11:43:09,408 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2018-11-18 11:43:09,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:43:09,411 INFO L225 Difference]: With dead ends: 65 [2018-11-18 11:43:09,411 INFO L226 Difference]: Without dead ends: 63 [2018-11-18 11:43:09,412 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-18 11:43:09,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-18 11:43:09,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-18 11:43:09,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-18 11:43:09,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2018-11-18 11:43:09,424 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 21 [2018-11-18 11:43:09,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:43:09,425 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2018-11-18 11:43:09,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 11:43:09,425 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2018-11-18 11:43:09,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-11-18 11:43:09,426 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:43:09,426 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:43:09,430 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:43:09,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:43:09,430 INFO L82 PathProgramCache]: Analyzing trace with hash 693279400, now seen corresponding path program 1 times [2018-11-18 11:43:09,430 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:43:09,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:43:09,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:43:09,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:43:09,432 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:43:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:43:09,488 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-11-18 11:43:09,488 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:43:09,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 11:43:09,489 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 11:43:09,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 11:43:09,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 11:43:09,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 11:43:09,490 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand 3 states. [2018-11-18 11:43:09,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:43:09,515 INFO L93 Difference]: Finished difference Result 93 states and 126 transitions. [2018-11-18 11:43:09,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 11:43:09,516 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2018-11-18 11:43:09,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:43:09,517 INFO L225 Difference]: With dead ends: 93 [2018-11-18 11:43:09,517 INFO L226 Difference]: Without dead ends: 63 [2018-11-18 11:43:09,518 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 11:43:09,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-18 11:43:09,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-18 11:43:09,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-18 11:43:09,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 83 transitions. [2018-11-18 11:43:09,529 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 83 transitions. Word has length 51 [2018-11-18 11:43:09,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:43:09,529 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 83 transitions. [2018-11-18 11:43:09,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 11:43:09,529 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 83 transitions. [2018-11-18 11:43:09,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-18 11:43:09,531 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:43:09,531 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:43:09,531 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:43:09,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:43:09,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1023624178, now seen corresponding path program 1 times [2018-11-18 11:43:09,532 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:43:09,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:43:09,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:43:09,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:43:09,533 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:43:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:43:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-11-18 11:43:09,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:43:09,608 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:43:09,608 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 53 with the following transitions: [2018-11-18 11:43:09,608 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [19], [25], [31], [39], [42], [45], [51], [57], [60], [75], [122], [125], [127], [130], [132], [133], [134], [135], [137], [138], [139], [140], [141], [142], [143], [144], [149], [150], [151], [152], [153] [2018-11-18 11:43:09,610 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 11:43:09,611 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 11:43:09,667 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 11:43:09,667 INFO L272 AbstractInterpreter]: Visited 36 different actions 66 times. Never merged. Never widened. Performed 114 root evaluator evaluations with a maximum evaluation depth of 4. Performed 114 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Never found a fixpoint. Largest state had 10 variables. [2018-11-18 11:43:09,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:43:09,670 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 11:43:09,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:43:09,671 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ff07827a-c5e0-40b3-a656-a15a6756caa9/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 11:43:09,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:43:09,678 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 11:43:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:43:09,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:43:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-11-18 11:43:09,744 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:43:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-11-18 11:43:09,823 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 11:43:09,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 9 [2018-11-18 11:43:09,824 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 11:43:09,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 11:43:09,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 11:43:09,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-11-18 11:43:09,825 INFO L87 Difference]: Start difference. First operand 63 states and 83 transitions. Second operand 6 states. [2018-11-18 11:43:09,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:43:09,927 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2018-11-18 11:43:09,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 11:43:09,927 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2018-11-18 11:43:09,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:43:09,928 INFO L225 Difference]: With dead ends: 71 [2018-11-18 11:43:09,929 INFO L226 Difference]: Without dead ends: 69 [2018-11-18 11:43:09,929 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-18 11:43:09,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-18 11:43:09,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2018-11-18 11:43:09,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-18 11:43:09,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2018-11-18 11:43:09,941 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 52 [2018-11-18 11:43:09,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:43:09,941 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2018-11-18 11:43:09,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 11:43:09,942 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2018-11-18 11:43:09,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-11-18 11:43:09,944 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:43:09,944 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:43:09,944 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:43:09,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:43:09,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1445669058, now seen corresponding path program 1 times [2018-11-18 11:43:09,945 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:43:09,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:43:09,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:43:09,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:43:09,945 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:43:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:43:10,024 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 34 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2018-11-18 11:43:10,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:43:10,024 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:43:10,024 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 89 with the following transitions: [2018-11-18 11:43:10,024 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [19], [25], [31], [39], [42], [45], [51], [57], [60], [75], [82], [85], [91], [97], [100], [103], [122], [125], [127], [130], [132], [133], [134], [135], [137], [138], [139], [140], [141], [142], [143], [144], [149], [150], [151], [152], [153], [154], [155], [156], [157], [158], [159], [160], [161], [162], [163], [164], [165] [2018-11-18 11:43:10,026 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 11:43:10,026 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 11:43:10,097 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 11:43:10,097 INFO L272 AbstractInterpreter]: Visited 54 different actions 114 times. Never merged. Never widened. Performed 188 root evaluator evaluations with a maximum evaluation depth of 4. Performed 188 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Never found a fixpoint. Largest state had 14 variables. [2018-11-18 11:43:10,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:43:10,126 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 11:43:10,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:43:10,126 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ff07827a-c5e0-40b3-a656-a15a6756caa9/bin-2019/utaipan/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 [2018-11-18 11:43:10,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:43:10,141 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 11:43:10,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:43:10,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:43:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-11-18 11:43:10,215 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:43:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-11-18 11:43:10,289 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 11:43:10,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 9 [2018-11-18 11:43:10,289 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 11:43:10,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 11:43:10,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 11:43:10,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-11-18 11:43:10,290 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand 6 states. [2018-11-18 11:43:10,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:43:10,347 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2018-11-18 11:43:10,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 11:43:10,347 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2018-11-18 11:43:10,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:43:10,349 INFO L225 Difference]: With dead ends: 78 [2018-11-18 11:43:10,349 INFO L226 Difference]: Without dead ends: 76 [2018-11-18 11:43:10,350 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-18 11:43:10,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-11-18 11:43:10,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2018-11-18 11:43:10,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-11-18 11:43:10,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 89 transitions. [2018-11-18 11:43:10,361 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 89 transitions. Word has length 88 [2018-11-18 11:43:10,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:43:10,361 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 89 transitions. [2018-11-18 11:43:10,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 11:43:10,361 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 89 transitions. [2018-11-18 11:43:10,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-11-18 11:43:10,363 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:43:10,363 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:43:10,364 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:43:10,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:43:10,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1059167203, now seen corresponding path program 1 times [2018-11-18 11:43:10,364 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:43:10,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:43:10,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:43:10,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:43:10,365 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:43:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:43:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 25 proven. 37 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2018-11-18 11:43:10,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:43:10,454 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:43:10,454 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 94 with the following transitions: [2018-11-18 11:43:10,455 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [19], [25], [31], [39], [42], [45], [51], [57], [60], [75], [82], [85], [91], [97], [100], [103], [122], [125], [127], [130], [132], [133], [134], [135], [137], [138], [139], [140], [141], [142], [143], [144], [149], [150], [151], [152], [153], [154], [155], [156], [157], [158], [159], [160], [161], [162], [163], [164], [165], [166], [167] [2018-11-18 11:43:10,457 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 11:43:10,457 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 11:43:10,518 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 11:43:10,518 INFO L272 AbstractInterpreter]: Visited 56 different actions 121 times. Never merged. Never widened. Performed 196 root evaluator evaluations with a maximum evaluation depth of 4. Performed 196 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Never found a fixpoint. Largest state had 14 variables. [2018-11-18 11:43:10,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:43:10,521 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 11:43:10,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:43:10,521 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ff07827a-c5e0-40b3-a656-a15a6756caa9/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 11:43:10,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:43:10,528 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 11:43:10,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:43:10,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:43:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2018-11-18 11:43:10,614 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:43:10,652 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2018-11-18 11:43:10,672 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 11:43:10,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 11 [2018-11-18 11:43:10,672 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 11:43:10,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 11:43:10,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 11:43:10,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-11-18 11:43:10,673 INFO L87 Difference]: Start difference. First operand 71 states and 89 transitions. Second operand 6 states. [2018-11-18 11:43:10,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:43:10,739 INFO L93 Difference]: Finished difference Result 78 states and 99 transitions. [2018-11-18 11:43:10,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 11:43:10,739 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2018-11-18 11:43:10,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:43:10,740 INFO L225 Difference]: With dead ends: 78 [2018-11-18 11:43:10,740 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 11:43:10,740 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-11-18 11:43:10,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 11:43:10,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 11:43:10,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 11:43:10,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 11:43:10,741 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 93 [2018-11-18 11:43:10,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:43:10,741 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 11:43:10,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 11:43:10,741 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 11:43:10,741 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 11:43:10,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 11:43:10,952 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 11:43:10,952 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 11:43:10,952 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 11:43:10,952 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 11:43:10,952 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 11:43:10,952 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 11:43:10,952 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 69) no Hoare annotation was computed. [2018-11-18 11:43:10,952 INFO L425 ceAbstractionStarter]: For program point L19(line 19) no Hoare annotation was computed. [2018-11-18 11:43:10,952 INFO L425 ceAbstractionStarter]: For program point L36(line 36) no Hoare annotation was computed. [2018-11-18 11:43:10,952 INFO L421 ceAbstractionStarter]: At program point L28(line 28) the Hoare annotation is: (and (<= 1 main_~cp~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 0 main_~scheme~0)) [2018-11-18 11:43:10,952 INFO L421 ceAbstractionStarter]: At program point L28-1(line 28) the Hoare annotation is: (and (<= 1 main_~cp~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 0 main_~scheme~0)) [2018-11-18 11:43:10,952 INFO L421 ceAbstractionStarter]: At program point L53(line 53) the Hoare annotation is: (and (<= 1 main_~cp~0) (<= 0 main_~c~0) (<= 0 main_~scheme~0) (<= (+ main_~cp~0 2) main_~urilen~0) (<= (+ main_~c~0 2) main_~tokenlen~0)) [2018-11-18 11:43:10,952 INFO L425 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2018-11-18 11:43:10,953 INFO L421 ceAbstractionStarter]: At program point L53-1(line 53) the Hoare annotation is: (and (<= 1 main_~cp~0) (<= 0 main_~c~0) (<= 0 main_~scheme~0) (<= (+ main_~cp~0 2) main_~urilen~0) (<= (+ main_~c~0 2) main_~tokenlen~0)) [2018-11-18 11:43:10,953 INFO L425 ceAbstractionStarter]: For program point L29(line 29) no Hoare annotation was computed. [2018-11-18 11:43:10,953 INFO L425 ceAbstractionStarter]: For program point L54(line 54) no Hoare annotation was computed. [2018-11-18 11:43:10,953 INFO L425 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-11-18 11:43:10,953 INFO L425 ceAbstractionStarter]: For program point L21-1(lines 11 69) no Hoare annotation was computed. [2018-11-18 11:43:10,953 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 69) no Hoare annotation was computed. [2018-11-18 11:43:10,953 INFO L425 ceAbstractionStarter]: For program point L30(lines 30 66) no Hoare annotation was computed. [2018-11-18 11:43:10,953 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 69) the Hoare annotation is: true [2018-11-18 11:43:10,953 INFO L425 ceAbstractionStarter]: For program point L55(lines 55 61) no Hoare annotation was computed. [2018-11-18 11:43:10,953 INFO L425 ceAbstractionStarter]: For program point L22(lines 11 69) no Hoare annotation was computed. [2018-11-18 11:43:10,953 INFO L425 ceAbstractionStarter]: For program point L55-1(lines 55 61) no Hoare annotation was computed. [2018-11-18 11:43:10,953 INFO L425 ceAbstractionStarter]: For program point L47(lines 47 65) no Hoare annotation was computed. [2018-11-18 11:43:10,953 INFO L421 ceAbstractionStarter]: At program point L39(line 39) the Hoare annotation is: (let ((.cse0 (<= 1 main_~cp~0)) (.cse1 (<= 0 main_~scheme~0))) (or (and (= main_~urilen~0 (+ main_~cp~0 1)) .cse0 .cse1) (and .cse0 .cse1 (<= (+ main_~cp~0 2) main_~urilen~0)))) [2018-11-18 11:43:10,953 INFO L421 ceAbstractionStarter]: At program point L31(line 31) the Hoare annotation is: (and (<= 1 main_~cp~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 0 main_~scheme~0)) [2018-11-18 11:43:10,954 INFO L421 ceAbstractionStarter]: At program point L31-1(line 31) the Hoare annotation is: (and (<= 1 main_~cp~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 0 main_~scheme~0)) [2018-11-18 11:43:10,954 INFO L425 ceAbstractionStarter]: For program point L23(lines 11 69) no Hoare annotation was computed. [2018-11-18 11:43:10,954 INFO L425 ceAbstractionStarter]: For program point L40(lines 30 66) no Hoare annotation was computed. [2018-11-18 11:43:10,954 INFO L421 ceAbstractionStarter]: At program point L57(line 57) the Hoare annotation is: (and (<= (+ main_~c~0 1) main_~tokenlen~0) (<= 1 main_~cp~0) (<= 0 main_~scheme~0) (<= 1 main_~c~0) (<= (+ main_~cp~0 2) main_~urilen~0)) [2018-11-18 11:43:10,954 INFO L421 ceAbstractionStarter]: At program point L57-1(line 57) the Hoare annotation is: (and (<= (+ main_~c~0 1) main_~tokenlen~0) (<= 1 main_~cp~0) (<= 0 main_~scheme~0) (<= 1 main_~c~0) (<= (+ main_~cp~0 2) main_~urilen~0)) [2018-11-18 11:43:10,954 INFO L421 ceAbstractionStarter]: At program point L49(line 49) the Hoare annotation is: (and (<= 1 main_~cp~0) (<= 0 main_~c~0) (<= 0 main_~scheme~0) (<= (+ main_~cp~0 2) main_~urilen~0)) [2018-11-18 11:43:10,954 INFO L421 ceAbstractionStarter]: At program point L49-1(line 49) the Hoare annotation is: (and (<= 1 main_~cp~0) (<= 0 main_~c~0) (<= 0 main_~scheme~0) (<= (+ main_~cp~0 2) main_~urilen~0)) [2018-11-18 11:43:10,955 INFO L425 ceAbstractionStarter]: For program point L33(lines 33 38) no Hoare annotation was computed. [2018-11-18 11:43:10,955 INFO L421 ceAbstractionStarter]: At program point L33-2(lines 32 38) the Hoare annotation is: (and (<= 1 main_~cp~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 0 main_~scheme~0)) [2018-11-18 11:43:10,955 INFO L421 ceAbstractionStarter]: At program point L33-3(lines 33 38) the Hoare annotation is: (and (<= 1 main_~cp~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 0 main_~scheme~0)) [2018-11-18 11:43:10,955 INFO L421 ceAbstractionStarter]: At program point L58(line 58) the Hoare annotation is: (and (<= (+ main_~c~0 1) main_~tokenlen~0) (<= 1 main_~cp~0) (<= 0 main_~scheme~0) (<= 1 main_~c~0) (<= (+ main_~cp~0 2) main_~urilen~0)) [2018-11-18 11:43:10,955 INFO L421 ceAbstractionStarter]: At program point L42(line 42) the Hoare annotation is: (and (<= 1 main_~cp~0) (<= 0 main_~scheme~0) (<= (+ main_~cp~0 2) main_~urilen~0)) [2018-11-18 11:43:10,955 INFO L421 ceAbstractionStarter]: At program point L42-1(line 42) the Hoare annotation is: (and (<= 1 main_~cp~0) (<= 0 main_~scheme~0) (<= (+ main_~cp~0 2) main_~urilen~0)) [2018-11-18 11:43:10,955 INFO L428 ceAbstractionStarter]: At program point L67(lines 11 69) the Hoare annotation is: true [2018-11-18 11:43:10,955 INFO L425 ceAbstractionStarter]: For program point L34(line 34) no Hoare annotation was computed. [2018-11-18 11:43:10,956 INFO L421 ceAbstractionStarter]: At program point L59(line 59) the Hoare annotation is: (and (<= (+ main_~c~0 1) main_~tokenlen~0) (<= 1 main_~cp~0) (<= 0 main_~scheme~0) (<= 1 main_~c~0) (<= (+ main_~cp~0 2) main_~urilen~0)) [2018-11-18 11:43:10,956 INFO L425 ceAbstractionStarter]: For program point L51(lines 51 63) no Hoare annotation was computed. [2018-11-18 11:43:10,956 INFO L425 ceAbstractionStarter]: For program point L18(line 18) no Hoare annotation was computed. [2018-11-18 11:43:10,956 INFO L421 ceAbstractionStarter]: At program point L51-2(lines 50 63) the Hoare annotation is: (and (<= 1 main_~cp~0) (<= 0 main_~c~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 0 main_~scheme~0)) [2018-11-18 11:43:10,956 INFO L425 ceAbstractionStarter]: For program point L43(lines 30 66) no Hoare annotation was computed. [2018-11-18 11:43:10,956 INFO L421 ceAbstractionStarter]: At program point L35(line 35) the Hoare annotation is: (and (<= 1 main_~cp~0) (<= 0 main_~scheme~0) (<= (+ main_~cp~0 2) main_~urilen~0)) [2018-11-18 11:43:10,956 INFO L421 ceAbstractionStarter]: At program point L35-1(line 35) the Hoare annotation is: (and (<= 1 main_~cp~0) (<= 0 main_~scheme~0) (<= (+ main_~cp~0 2) main_~urilen~0)) [2018-11-18 11:43:10,956 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-11-18 11:43:10,957 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-18 11:43:10,957 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-18 11:43:10,957 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-11-18 11:43:10,957 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-11-18 11:43:10,957 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-11-18 11:43:10,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 11:43:10 BoogieIcfgContainer [2018-11-18 11:43:10,969 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 11:43:10,969 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 11:43:10,969 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 11:43:10,970 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 11:43:10,970 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:43:08" (3/4) ... [2018-11-18 11:43:10,974 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 11:43:10,980 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 11:43:10,981 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 11:43:10,981 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-18 11:43:10,985 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2018-11-18 11:43:10,986 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-11-18 11:43:10,986 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 11:43:11,040 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_ff07827a-c5e0-40b3-a656-a15a6756caa9/bin-2019/utaipan/witness.graphml [2018-11-18 11:43:11,040 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 11:43:11,041 INFO L168 Benchmark]: Toolchain (without parser) took 3181.06 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 222.3 MB). Free memory was 952.7 MB in the beginning and 1.1 GB in the end (delta: -160.1 MB). Peak memory consumption was 62.2 MB. Max. memory is 11.5 GB. [2018-11-18 11:43:11,042 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:43:11,043 INFO L168 Benchmark]: CACSL2BoogieTranslator took 200.95 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 941.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:43:11,043 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.16 ms. Allocated memory is still 1.0 GB. Free memory was 941.9 MB in the beginning and 939.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:43:11,043 INFO L168 Benchmark]: Boogie Preprocessor took 20.36 ms. Allocated memory is still 1.0 GB. Free memory is still 939.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:43:11,043 INFO L168 Benchmark]: RCFGBuilder took 295.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -192.0 MB). Peak memory consumption was 17.1 MB. Max. memory is 11.5 GB. [2018-11-18 11:43:11,044 INFO L168 Benchmark]: TraceAbstraction took 2571.87 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 68.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.5 MB). Peak memory consumption was 82.1 MB. Max. memory is 11.5 GB. [2018-11-18 11:43:11,044 INFO L168 Benchmark]: Witness Printer took 70.85 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 11.5 GB. [2018-11-18 11:43:11,046 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 200.95 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 941.9 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 18.16 ms. Allocated memory is still 1.0 GB. Free memory was 941.9 MB in the beginning and 939.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.36 ms. Allocated memory is still 1.0 GB. Free memory is still 939.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 295.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -192.0 MB). Peak memory consumption was 17.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2571.87 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 68.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.5 MB). Peak memory consumption was 82.1 MB. Max. memory is 11.5 GB. * Witness Printer took 70.85 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 50]: Loop Invariant Derived loop invariant: ((1 <= cp && 0 <= c) && cp + 1 <= urilen) && 0 <= scheme - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: (1 <= cp && cp + 1 <= urilen) && 0 <= scheme - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 55 locations, 1 error locations. SAFE Result, 2.5s OverallTime, 6 OverallIterations, 14 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 404 SDtfs, 99 SDslu, 998 SDs, 0 SdLazy, 321 SolverSat, 85 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 556 GetRequests, 504 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 4 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 14 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 26 LocationsWithAnnotation, 76 PreInvPairs, 104 NumberOfFragments, 317 HoareAnnotationTreeSize, 76 FomulaSimplifications, 123 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 26 FomulaSimplificationsInter, 137 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 575 NumberOfCodeBlocks, 575 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 815 ConstructedInterpolants, 0 QuantifiedInterpolants, 86463 SizeOfPredicates, 14 NumberOfNonLiveVariables, 527 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 14 InterpolantComputations, 10 PerfectInterpolantSequences, 2077/2172 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...