./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark09_conjunctive.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark09_conjunctive.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 950600dbb36b2cdf644bab2e11db14741ba73676 .......................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:07:04,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:07:04,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:07:04,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:07:04,944 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:07:04,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:07:04,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:07:04,951 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:07:04,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:07:04,955 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:07:04,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:07:04,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:07:04,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:07:04,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:07:04,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:07:04,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:07:04,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:07:04,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:07:04,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:07:04,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:07:04,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:07:04,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:07:04,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:07:04,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:07:04,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:07:04,998 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:07:04,998 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:07:05,000 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:07:05,000 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:07:05,002 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:07:05,002 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:07:05,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:07:05,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:07:05,006 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:07:05,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:07:05,008 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:07:05,009 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:07:05,010 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:07:05,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:07:05,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:07:05,013 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:07:05,015 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:07:05,061 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:07:05,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:07:05,062 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:07:05,063 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:07:05,063 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:07:05,063 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:07:05,064 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:07:05,064 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:07:05,064 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:07:05,065 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:07:05,065 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:07:05,065 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:07:05,066 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:07:05,066 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:07:05,066 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:07:05,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:07:05,068 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:07:05,068 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:07:05,068 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:07:05,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:07:05,069 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:07:05,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:07:05,069 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:07:05,070 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:07:05,070 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:07:05,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:07:05,071 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:07:05,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:07:05,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:07:05,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:07:05,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:07:05,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:07:05,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:07:05,073 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:07:05,073 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:07:05,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:07:05,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:07:05,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:07:05,074 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:07:05,074 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 950600dbb36b2cdf644bab2e11db14741ba73676 [2021-10-13 07:07:05,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:07:05,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:07:05,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:07:05,436 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:07:05,437 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:07:05,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-zilu/benchmark09_conjunctive.i [2021-10-13 07:07:05,509 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/bin/utaipan-q2qaUkNPG8/data/705d646ae/4311014f6d374ebe8f5ea7e8e29f152d/FLAGd78a3afeb [2021-10-13 07:07:06,025 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:07:06,026 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/sv-benchmarks/c/loop-zilu/benchmark09_conjunctive.i [2021-10-13 07:07:06,039 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/bin/utaipan-q2qaUkNPG8/data/705d646ae/4311014f6d374ebe8f5ea7e8e29f152d/FLAGd78a3afeb [2021-10-13 07:07:06,393 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/bin/utaipan-q2qaUkNPG8/data/705d646ae/4311014f6d374ebe8f5ea7e8e29f152d [2021-10-13 07:07:06,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:07:06,404 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:07:06,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:07:06,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:07:06,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:07:06,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:07:06" (1/1) ... [2021-10-13 07:07:06,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66f8ff0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:06, skipping insertion in model container [2021-10-13 07:07:06,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:07:06" (1/1) ... [2021-10-13 07:07:06,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:07:06,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:07:06,655 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/sv-benchmarks/c/loop-zilu/benchmark09_conjunctive.i[873,886] [2021-10-13 07:07:06,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:07:06,678 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:07:06,692 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/sv-benchmarks/c/loop-zilu/benchmark09_conjunctive.i[873,886] [2021-10-13 07:07:06,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:07:06,711 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:07:06,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:06 WrapperNode [2021-10-13 07:07:06,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:07:06,713 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:07:06,714 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:07:06,714 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:07:06,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:06" (1/1) ... [2021-10-13 07:07:06,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:06" (1/1) ... [2021-10-13 07:07:06,748 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:07:06,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:07:06,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:07:06,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:07:06,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:06" (1/1) ... [2021-10-13 07:07:06,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:06" (1/1) ... [2021-10-13 07:07:06,762 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:06" (1/1) ... [2021-10-13 07:07:06,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:06" (1/1) ... [2021-10-13 07:07:06,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:06" (1/1) ... [2021-10-13 07:07:06,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:06" (1/1) ... [2021-10-13 07:07:06,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:06" (1/1) ... [2021-10-13 07:07:06,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:07:06,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:07:06,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:07:06,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:07:06,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:06" (1/1) ... [2021-10-13 07:07:06,786 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:07:06,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:07:06,819 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:07:06,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:07:06,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:07:06,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:07:06,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:07:06,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:07:07,101 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:07:07,101 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 07:07:07,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:07:07 BoogieIcfgContainer [2021-10-13 07:07:07,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:07:07,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:07:07,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:07:07,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:07:07,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:07:06" (1/3) ... [2021-10-13 07:07:07,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae4e5ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:07:07, skipping insertion in model container [2021-10-13 07:07:07,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:06" (2/3) ... [2021-10-13 07:07:07,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae4e5ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:07:07, skipping insertion in model container [2021-10-13 07:07:07,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:07:07" (3/3) ... [2021-10-13 07:07:07,115 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark09_conjunctive.i [2021-10-13 07:07:07,122 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:07:07,123 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:07:07,182 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:07:07,191 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:07:07,192 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:07:07,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:07:07,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:07:07,220 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:07:07,221 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:07:07,221 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:07:07,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:07:07,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1983092628, now seen corresponding path program 1 times [2021-10-13 07:07:07,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:07:07,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208272616] [2021-10-13 07:07:07,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:07:07,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:07:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:07:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:07:07,534 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:07:07,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208272616] [2021-10-13 07:07:07,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208272616] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:07:07,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:07:07,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 07:07:07,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889664565] [2021-10-13 07:07:07,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:07:07,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:07:07,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:07:07,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:07:07,593 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:07:07,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:07:07,704 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-10-13 07:07:07,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:07:07,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 07:07:07,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:07:07,716 INFO L225 Difference]: With dead ends: 24 [2021-10-13 07:07:07,716 INFO L226 Difference]: Without dead ends: 9 [2021-10-13 07:07:07,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:07:07,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-13 07:07:07,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-13 07:07:07,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:07:07,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-13 07:07:07,756 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-10-13 07:07:07,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:07:07,757 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-13 07:07:07,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:07:07,758 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-13 07:07:07,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:07:07,759 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:07:07,759 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:07:07,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:07:07,776 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:07:07,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:07:07,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1323983189, now seen corresponding path program 1 times [2021-10-13 07:07:07,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:07:07,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47252940] [2021-10-13 07:07:07,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:07:07,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:07:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:07:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:07:07,899 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:07:07,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47252940] [2021-10-13 07:07:07,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47252940] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:07:07,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:07:07,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:07:07,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862309682] [2021-10-13 07:07:07,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:07:07,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:07:07,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:07:07,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:07:07,906 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:07:07,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:07:07,958 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-10-13 07:07:07,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:07:07,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 07:07:07,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:07:07,960 INFO L225 Difference]: With dead ends: 13 [2021-10-13 07:07:07,960 INFO L226 Difference]: Without dead ends: 9 [2021-10-13 07:07:07,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:07:07,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-13 07:07:07,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-13 07:07:07,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:07:07,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-13 07:07:07,964 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2021-10-13 07:07:07,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:07:07,964 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-13 07:07:07,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:07:07,965 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-13 07:07:07,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:07:07,965 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:07:07,966 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:07:07,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:07:07,966 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:07:07,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:07:07,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1903903079, now seen corresponding path program 1 times [2021-10-13 07:07:07,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:07:07,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690419727] [2021-10-13 07:07:07,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:07:07,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:07:07,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:07:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:07:08,103 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:07:08,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690419727] [2021-10-13 07:07:08,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690419727] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:07:08,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83949886] [2021-10-13 07:07:08,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:07:08,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:07:08,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:07:08,107 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:07:08,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:07:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:07:08,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:07:08,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:07:08,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:07:08,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:07:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:07:08,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83949886] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:07:08,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-10-13 07:07:08,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 12 [2021-10-13 07:07:08,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217612485] [2021-10-13 07:07:08,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:07:08,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:07:08,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:07:08,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:07:08,581 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:07:08,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:07:08,637 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2021-10-13 07:07:08,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:07:08,639 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 07:07:08,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:07:08,639 INFO L225 Difference]: With dead ends: 9 [2021-10-13 07:07:08,639 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 07:07:08,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:07:08,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 07:07:08,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 07:07:08,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:07:08,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 07:07:08,643 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2021-10-13 07:07:08,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:07:08,643 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 07:07:08,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:07:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 07:07:08,644 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 07:07:08,647 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:07:08,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:07:08,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:07:08,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 07:07:08,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:07:08,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:07:08,922 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 07:07:08,922 INFO L860 garLoopResultBuilder]: At program point L29(lines 19 30) the Hoare annotation is: true [2021-10-13 07:07:08,922 INFO L853 garLoopResultBuilder]: At program point L23-2(lines 23 27) the Hoare annotation is: (and (<= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~x~0) (<= 0 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0)) [2021-10-13 07:07:08,923 INFO L857 garLoopResultBuilder]: For program point L23-3(lines 23 27) no Hoare annotation was computed. [2021-10-13 07:07:08,923 INFO L857 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2021-10-13 07:07:08,923 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 07:07:08,923 INFO L857 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2021-10-13 07:07:08,924 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-10-13 07:07:08,924 INFO L857 garLoopResultBuilder]: For program point L22(line 22) no Hoare annotation was computed. [2021-10-13 07:07:08,924 INFO L857 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2021-10-13 07:07:08,924 INFO L857 garLoopResultBuilder]: For program point L14(lines 14 18) no Hoare annotation was computed. [2021-10-13 07:07:08,929 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:07:08,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:07:08 BoogieIcfgContainer [2021-10-13 07:07:08,943 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:07:08,944 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:07:08,944 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:07:08,944 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:07:08,945 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:07:07" (3/4) ... [2021-10-13 07:07:08,948 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 07:07:08,963 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-13 07:07:08,963 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 07:07:08,964 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:07:08,964 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:07:09,001 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:07:09,002 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:07:09,003 INFO L168 Benchmark]: Toolchain (without parser) took 2597.92 ms. Allocated memory was 81.8 MB in the beginning and 115.3 MB in the end (delta: 33.6 MB). Free memory was 44.7 MB in the beginning and 69.6 MB in the end (delta: -24.9 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:07:09,004 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 81.8 MB. Free memory was 60.8 MB in the beginning and 60.8 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:07:09,005 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.43 ms. Allocated memory was 81.8 MB in the beginning and 115.3 MB in the end (delta: 33.6 MB). Free memory was 44.5 MB in the beginning and 92.2 MB in the end (delta: -47.7 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:07:09,005 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.37 ms. Allocated memory is still 115.3 MB. Free memory was 92.2 MB in the beginning and 90.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:07:09,006 INFO L168 Benchmark]: Boogie Preprocessor took 25.04 ms. Allocated memory is still 115.3 MB. Free memory was 90.7 MB in the beginning and 89.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:07:09,006 INFO L168 Benchmark]: RCFGBuilder took 329.24 ms. Allocated memory is still 115.3 MB. Free memory was 89.6 MB in the beginning and 79.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:07:09,007 INFO L168 Benchmark]: TraceAbstraction took 1836.06 ms. Allocated memory is still 115.3 MB. Free memory was 78.6 MB in the beginning and 72.4 MB in the end (delta: 6.2 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:07:09,008 INFO L168 Benchmark]: Witness Printer took 58.01 ms. Allocated memory is still 115.3 MB. Free memory was 72.4 MB in the beginning and 69.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:07:09,011 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 81.8 MB. Free memory was 60.8 MB in the beginning and 60.8 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 304.43 ms. Allocated memory was 81.8 MB in the beginning and 115.3 MB in the end (delta: 33.6 MB). Free memory was 44.5 MB in the beginning and 92.2 MB in the end (delta: -47.7 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.37 ms. Allocated memory is still 115.3 MB. Free memory was 92.2 MB in the beginning and 90.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.04 ms. Allocated memory is still 115.3 MB. Free memory was 90.7 MB in the beginning and 89.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 329.24 ms. Allocated memory is still 115.3 MB. Free memory was 89.6 MB in the beginning and 79.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1836.06 ms. Allocated memory is still 115.3 MB. Free memory was 78.6 MB in the beginning and 72.4 MB in the end (delta: 6.2 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. * Witness Printer took 58.01 ms. Allocated memory is still 115.3 MB. Free memory was 72.4 MB in the beginning and 69.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1749.6ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 14.9ms, AutomataDifference: 297.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 49.5ms, InitialAbstractionConstructionTime: 14.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16 SDtfs, 24 SDslu, 22 SDs, 0 SdLazy, 42 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 73.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 222.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 22.9ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 6 NumberOfFragments, 11 HoareAnnotationTreeSize, 2 FomulaSimplifications, 26 FormulaSimplificationTreeSizeReduction, 17.3ms HoareSimplificationTime, 2 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 25.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 15.5ms SsaConstructionTime, 100.8ms SatisfiabilityAnalysisTime, 778.9ms InterpolantComputationTime, 29 NumberOfCodeBlocks, 29 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 158 SizeOfPredicates, 5 NumberOfNonLiveVariables, 48 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 1/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (y <= x && 0 <= x) && x <= y - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-13 07:07:09,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb651007-7e24-46e0-aa52-094be63e2744/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...