./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/n.c40.c --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_691dc4df-fc16-453c-890e-0c16bf562611/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691dc4df-fc16-453c-890e-0c16bf562611/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_691dc4df-fc16-453c-890e-0c16bf562611/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691dc4df-fc16-453c-890e-0c16bf562611/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/n.c40.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691dc4df-fc16-453c-890e-0c16bf562611/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_691dc4df-fc16-453c-890e-0c16bf562611/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 ed3f8420ae2f88e8ad9c7f42b645f73b3c08f37e ............................................................................................................................................................................................................................................................................................................................................................................. 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 07:27:34,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:27:34,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:27:34,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:27:34,951 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:27:34,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:27:34,960 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:27:34,965 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:27:34,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:27:34,975 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:27:34,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:27:34,979 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:27:34,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:27:34,982 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:27:34,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:27:34,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:27:34,996 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:27:34,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:27:35,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:27:35,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:27:35,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:27:35,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:27:35,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:27:35,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:27:35,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:27:35,030 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:27:35,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:27:35,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:27:35,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:27:35,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:27:35,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:27:35,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:27:35,040 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:27:35,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:27:35,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:27:35,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:27:35,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:27:35,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:27:35,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:27:35,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:27:35,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:27:35,049 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691dc4df-fc16-453c-890e-0c16bf562611/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:27:35,104 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:27:35,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:27:35,106 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:27:35,106 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:27:35,106 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:27:35,107 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:27:35,107 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:27:35,107 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:27:35,107 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:27:35,108 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:27:35,109 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:27:35,109 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:27:35,110 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:27:35,110 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:27:35,110 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:27:35,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:27:35,111 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:27:35,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:27:35,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:27:35,112 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:27:35,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:27:35,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:27:35,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:27:35,113 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:27:35,113 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:27:35,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:27:35,114 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:27:35,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:27:35,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:27:35,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:27:35,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:27:35,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:27:35,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:27:35,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:27:35,118 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:27:35,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:27:35,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:27:35,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:27:35,119 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:27:35,120 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_691dc4df-fc16-453c-890e-0c16bf562611/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691dc4df-fc16-453c-890e-0c16bf562611/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed3f8420ae2f88e8ad9c7f42b645f73b3c08f37e [2021-10-13 07:27:35,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:27:35,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:27:35,541 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:27:35,543 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:27:35,544 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:27:35,545 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691dc4df-fc16-453c-890e-0c16bf562611/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loops/n.c40.c [2021-10-13 07:27:35,626 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691dc4df-fc16-453c-890e-0c16bf562611/bin/utaipan-q2qaUkNPG8/data/b220a320c/a2d750b9d4c942cda6463ac8bcbb05b9/FLAG62dcd3688 [2021-10-13 07:27:36,192 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:27:36,193 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691dc4df-fc16-453c-890e-0c16bf562611/sv-benchmarks/c/loops/n.c40.c [2021-10-13 07:27:36,207 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691dc4df-fc16-453c-890e-0c16bf562611/bin/utaipan-q2qaUkNPG8/data/b220a320c/a2d750b9d4c942cda6463ac8bcbb05b9/FLAG62dcd3688 [2021-10-13 07:27:36,540 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691dc4df-fc16-453c-890e-0c16bf562611/bin/utaipan-q2qaUkNPG8/data/b220a320c/a2d750b9d4c942cda6463ac8bcbb05b9 [2021-10-13 07:27:36,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:27:36,544 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:27:36,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:27:36,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:27:36,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:27:36,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:27:36" (1/1) ... [2021-10-13 07:27:36,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22068060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:27:36, skipping insertion in model container [2021-10-13 07:27:36,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:27:36" (1/1) ... [2021-10-13 07:27:36,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:27:36,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:27:36,777 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_691dc4df-fc16-453c-890e-0c16bf562611/sv-benchmarks/c/loops/n.c40.c[498,511] [2021-10-13 07:27:36,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:27:36,804 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:27:36,827 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_691dc4df-fc16-453c-890e-0c16bf562611/sv-benchmarks/c/loops/n.c40.c[498,511] [2021-10-13 07:27:36,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:27:36,852 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:27:36,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:27:36 WrapperNode [2021-10-13 07:27:36,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:27:36,854 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:27:36,855 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:27:36,855 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:27:36,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:27:36" (1/1) ... [2021-10-13 07:27:36,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:27:36" (1/1) ... [2021-10-13 07:27:36,897 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:27:36,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:27:36,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:27:36,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:27:36,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:27:36" (1/1) ... [2021-10-13 07:27:36,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:27:36" (1/1) ... [2021-10-13 07:27:36,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:27:36" (1/1) ... [2021-10-13 07:27:36,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:27:36" (1/1) ... [2021-10-13 07:27:36,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:27:36" (1/1) ... [2021-10-13 07:27:36,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:27:36" (1/1) ... [2021-10-13 07:27:36,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:27:36" (1/1) ... [2021-10-13 07:27:36,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:27:36,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:27:36,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:27:36,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:27:36,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:27:36" (1/1) ... [2021-10-13 07:27:36,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:27:36,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691dc4df-fc16-453c-890e-0c16bf562611/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:27:36,991 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691dc4df-fc16-453c-890e-0c16bf562611/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:27:37,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691dc4df-fc16-453c-890e-0c16bf562611/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:27:37,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:27:37,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:27:37,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:27:37,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:27:37,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:27:37,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:27:37,347 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:27:37,348 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-13 07:27:37,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:27:37 BoogieIcfgContainer [2021-10-13 07:27:37,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:27:37,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:27:37,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:27:37,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:27:37,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:27:36" (1/3) ... [2021-10-13 07:27:37,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@415d8472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:27:37, skipping insertion in model container [2021-10-13 07:27:37,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:27:36" (2/3) ... [2021-10-13 07:27:37,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@415d8472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:27:37, skipping insertion in model container [2021-10-13 07:27:37,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:27:37" (3/3) ... [2021-10-13 07:27:37,375 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c40.c [2021-10-13 07:27:37,381 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:27:37,381 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:27:37,468 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:27:37,482 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 07:27:37,483 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:27:37,500 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 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 07:27:37,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:27:37,517 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:27:37,517 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:27:37,518 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:27:37,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:27:37,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1931578032, now seen corresponding path program 1 times [2021-10-13 07:27:37,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:27:37,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837225666] [2021-10-13 07:27:37,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:27:37,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:27:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:27:37,778 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 07:27:37,780 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:27:37,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837225666] [2021-10-13 07:27:37,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837225666] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:27:37,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:27:37,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:27:37,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855812534] [2021-10-13 07:27:37,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:27:37,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:27:37,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:27:37,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:27:37,821 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 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 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 07:27:37,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:27:37,838 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2021-10-13 07:27:37,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:27:37,841 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 07:27:37,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:27:37,851 INFO L225 Difference]: With dead ends: 17 [2021-10-13 07:27:37,852 INFO L226 Difference]: Without dead ends: 8 [2021-10-13 07:27:37,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:27:37,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-13 07:27:37,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-13 07:27:37,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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 07:27:37,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-10-13 07:27:37,890 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-10-13 07:27:37,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:27:37,890 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-10-13 07:27:37,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 07:27:37,891 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-10-13 07:27:37,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:27:37,892 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:27:37,892 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:27:37,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:27:37,893 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:27:37,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:27:37,897 INFO L82 PathProgramCache]: Analyzing trace with hash -456660629, now seen corresponding path program 1 times [2021-10-13 07:27:37,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:27:37,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939858201] [2021-10-13 07:27:37,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:27:37,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:27:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:27:38,001 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 07:27:38,001 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:27:38,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939858201] [2021-10-13 07:27:38,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939858201] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:27:38,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:27:38,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:27:38,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137209687] [2021-10-13 07:27:38,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:27:38,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:27:38,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:27:38,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:27:38,006 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 07:27:38,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:27:38,033 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-10-13 07:27:38,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:27:38,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 07:27:38,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:27:38,035 INFO L225 Difference]: With dead ends: 15 [2021-10-13 07:27:38,035 INFO L226 Difference]: Without dead ends: 10 [2021-10-13 07:27:38,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:27:38,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-13 07:27:38,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-13 07:27:38,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 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 07:27:38,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-10-13 07:27:38,042 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2021-10-13 07:27:38,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:27:38,043 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-10-13 07:27:38,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 07:27:38,044 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-10-13 07:27:38,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:27:38,045 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:27:38,045 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:27:38,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:27:38,047 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:27:38,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:27:38,058 INFO L82 PathProgramCache]: Analyzing trace with hash 744650192, now seen corresponding path program 1 times [2021-10-13 07:27:38,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:27:38,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708880467] [2021-10-13 07:27:38,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:27:38,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:27:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:27:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:27:38,228 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:27:38,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708880467] [2021-10-13 07:27:38,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708880467] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:27:38,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:27:38,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:27:38,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880810738] [2021-10-13 07:27:38,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:27:38,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:27:38,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:27:38,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:27:38,231 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 07:27:38,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:27:38,246 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2021-10-13 07:27:38,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:27:38,247 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) Word has length 9 [2021-10-13 07:27:38,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:27:38,248 INFO L225 Difference]: With dead ends: 10 [2021-10-13 07:27:38,248 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 07:27:38,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:27:38,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 07:27:38,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 07:27:38,278 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 07:27:38,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 07:27:38,279 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2021-10-13 07:27:38,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:27:38,279 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 07:27:38,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 07:27:38,280 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 07:27:38,281 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 07:27:38,284 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:27:38,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:27:38,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 07:27:38,316 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:27:38,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:27:38,342 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 07:27:38,342 INFO L857 garLoopResultBuilder]: For program point L21(lines 21 22) no Hoare annotation was computed. [2021-10-13 07:27:38,342 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 07:27:38,342 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 22) no Hoare annotation was computed. [2021-10-13 07:27:38,343 INFO L857 garLoopResultBuilder]: For program point L22(line 22) no Hoare annotation was computed. [2021-10-13 07:27:38,343 INFO L857 garLoopResultBuilder]: For program point L20(lines 20 22) no Hoare annotation was computed. [2021-10-13 07:27:38,343 INFO L860 garLoopResultBuilder]: At program point L20-1(lines 20 22) the Hoare annotation is: true [2021-10-13 07:27:38,343 INFO L857 garLoopResultBuilder]: For program point L14-1(lines 14 17) no Hoare annotation was computed. [2021-10-13 07:27:38,344 INFO L853 garLoopResultBuilder]: At program point L14-3(lines 14 17) the Hoare annotation is: (and (= (select (select |#memory_int| |~#x~0.base|) (+ ~i~0 |~#x~0.offset|)) 0) (not (= |~#x~0.base| |~#y~0.base|)) (= ~i~0 0)) [2021-10-13 07:27:38,344 INFO L857 garLoopResultBuilder]: For program point L14-4(lines 14 17) no Hoare annotation was computed. [2021-10-13 07:27:38,365 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:27:38,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:27:38 BoogieIcfgContainer [2021-10-13 07:27:38,384 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:27:38,386 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:27:38,386 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:27:38,386 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:27:38,386 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:27:37" (3/4) ... [2021-10-13 07:27:38,390 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 07:27:38,402 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-13 07:27:38,402 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 07:27:38,403 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-13 07:27:38,403 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:27:38,456 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691dc4df-fc16-453c-890e-0c16bf562611/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:27:38,456 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:27:38,458 INFO L168 Benchmark]: Toolchain (without parser) took 1912.62 ms. Allocated memory is still 109.1 MB. Free memory was 73.4 MB in the beginning and 81.6 MB in the end (delta: -8.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:27:38,458 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 109.1 MB. Free memory was 89.6 MB in the beginning and 89.5 MB in the end (delta: 65.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:27:38,459 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.24 ms. Allocated memory is still 109.1 MB. Free memory was 73.2 MB in the beginning and 86.2 MB in the end (delta: -13.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:27:38,459 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.81 ms. Allocated memory is still 109.1 MB. Free memory was 86.2 MB in the beginning and 84.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:27:38,460 INFO L168 Benchmark]: Boogie Preprocessor took 49.50 ms. Allocated memory is still 109.1 MB. Free memory was 84.8 MB in the beginning and 83.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:27:38,461 INFO L168 Benchmark]: RCFGBuilder took 402.82 ms. Allocated memory is still 109.1 MB. Free memory was 83.8 MB in the beginning and 72.2 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:27:38,466 INFO L168 Benchmark]: TraceAbstraction took 1031.52 ms. Allocated memory is still 109.1 MB. Free memory was 71.9 MB in the beginning and 84.2 MB in the end (delta: -12.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:27:38,469 INFO L168 Benchmark]: Witness Printer took 70.74 ms. Allocated memory is still 109.1 MB. Free memory was 84.2 MB in the beginning and 81.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:27:38,476 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 109.1 MB. Free memory was 89.6 MB in the beginning and 89.5 MB in the end (delta: 65.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 292.24 ms. Allocated memory is still 109.1 MB. Free memory was 73.2 MB in the beginning and 86.2 MB in the end (delta: -13.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.81 ms. Allocated memory is still 109.1 MB. Free memory was 86.2 MB in the beginning and 84.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 49.50 ms. Allocated memory is still 109.1 MB. Free memory was 84.8 MB in the beginning and 83.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 402.82 ms. Allocated memory is still 109.1 MB. Free memory was 83.8 MB in the beginning and 72.2 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1031.52 ms. Allocated memory is still 109.1 MB. Free memory was 71.9 MB in the beginning and 84.2 MB in the end (delta: -12.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 70.74 ms. Allocated memory is still 109.1 MB. Free memory was 84.2 MB in the beginning and 81.6 MB in the end (delta: 2.6 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: 22]: 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, 10 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 882.7ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 22.9ms, AutomataDifference: 106.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 56.2ms, InitialAbstractionConstructionTime: 13.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 17 SDtfs, 1 SDslu, 3 SDs, 0 SdLazy, 9 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 24.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 52.7ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 18 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 41.9ms HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 7.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 21.9ms SsaConstructionTime, 117.6ms SatisfiabilityAnalysisTime, 272.9ms InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 19 ConstructedInterpolants, 0 QuantifiedInterpolants, 56 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 2/2 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: 20]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (unknown-#memory_int-unknown[x][i + x] == 0 && !(x == y)) && i == 0 RESULT: Ultimate proved your program to be correct! [2021-10-13 07:27:38,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691dc4df-fc16-453c-890e-0c16bf562611/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...