./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1bdc21b2f61b0d69220994ec3f8dc9d2db928c146bd54c19e0632aa07d01871a ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 05:55:10,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:55:10,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:55:10,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:55:10,932 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:55:10,934 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:55:10,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:55:10,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:55:10,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:55:10,943 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:55:10,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:55:10,946 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:55:10,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:55:10,948 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:55:10,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:55:10,952 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:55:10,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:55:10,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:55:10,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:55:10,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:55:10,963 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:55:10,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:55:10,966 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:55:10,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:55:10,971 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:55:10,972 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:55:10,973 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:55:10,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:55:10,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:55:10,976 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:55:10,977 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:55:10,978 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:55:10,979 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:55:10,980 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:55:10,982 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:55:10,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:55:10,983 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:55:10,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:55:10,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:55:10,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:55:10,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:55:10,988 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-29 05:55:11,014 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:55:11,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:55:11,015 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:55:11,015 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:55:11,016 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:55:11,016 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:55:11,016 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 05:55:11,017 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:55:11,017 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:55:11,017 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 05:55:11,017 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 05:55:11,018 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:55:11,018 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 05:55:11,018 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 05:55:11,019 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 05:55:11,020 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-29 05:55:11,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-29 05:55:11,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:55:11,020 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:55:11,021 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-29 05:55:11,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:55:11,021 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:55:11,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:55:11,022 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-29 05:55:11,022 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-29 05:55:11,023 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-29 05:55:11,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:55:11,023 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:55:11,023 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:55:11,024 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:55:11,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:55:11,024 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:55:11,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:55:11,025 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:55:11,025 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:55:11,025 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 05:55:11,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 05:55:11,026 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:55:11,026 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:55:11,027 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_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bdc21b2f61b0d69220994ec3f8dc9d2db928c146bd54c19e0632aa07d01871a [2021-10-29 05:55:11,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:55:11,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:55:11,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:55:11,365 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:55:11,365 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:55:11,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2021-10-29 05:55:11,428 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/data/65a733c6d/fafbbbedb44b41ca9887bffc5347d6a3/FLAG0d3491316 [2021-10-29 05:55:12,044 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:55:12,050 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2021-10-29 05:55:12,069 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/data/65a733c6d/fafbbbedb44b41ca9887bffc5347d6a3/FLAG0d3491316 [2021-10-29 05:55:12,317 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/data/65a733c6d/fafbbbedb44b41ca9887bffc5347d6a3 [2021-10-29 05:55:12,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:55:12,321 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:55:12,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:55:12,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:55:12,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:55:12,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:55:12" (1/1) ... [2021-10-29 05:55:12,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78297687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:12, skipping insertion in model container [2021-10-29 05:55:12,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:55:12" (1/1) ... [2021-10-29 05:55:12,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:55:12,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:55:12,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:55:12,689 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:55:12,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:55:12,756 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:55:12,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:12 WrapperNode [2021-10-29 05:55:12,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:55:12,759 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:55:12,759 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:55:12,759 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:55:12,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:12" (1/1) ... [2021-10-29 05:55:12,791 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:12" (1/1) ... [2021-10-29 05:55:12,817 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:55:12,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:55:12,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:55:12,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:55:12,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:12" (1/1) ... [2021-10-29 05:55:12,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:12" (1/1) ... [2021-10-29 05:55:12,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:12" (1/1) ... [2021-10-29 05:55:12,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:12" (1/1) ... [2021-10-29 05:55:12,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:12" (1/1) ... [2021-10-29 05:55:12,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:12" (1/1) ... [2021-10-29 05:55:12,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:12" (1/1) ... [2021-10-29 05:55:12,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:55:12,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:55:12,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:55:12,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:55:12,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:12" (1/1) ... [2021-10-29 05:55:12,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:55:12,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:55:12,907 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:55:12,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:55:12,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-29 05:55:12,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-29 05:55:12,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-29 05:55:12,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:55:12,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-29 05:55:12,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 05:55:12,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:55:12,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:55:13,421 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:55:13,422 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-29 05:55:13,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:55:13 BoogieIcfgContainer [2021-10-29 05:55:13,424 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:55:13,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:55:13,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:55:13,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:55:13,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:55:12" (1/3) ... [2021-10-29 05:55:13,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b249c3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:55:13, skipping insertion in model container [2021-10-29 05:55:13,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:12" (2/3) ... [2021-10-29 05:55:13,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b249c3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:55:13, skipping insertion in model container [2021-10-29 05:55:13,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:55:13" (3/3) ... [2021-10-29 05:55:13,434 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1_1-1.i [2021-10-29 05:55:13,440 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:55:13,440 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-10-29 05:55:13,500 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:55:13,506 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-10-29 05:55:13,506 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-10-29 05:55:13,519 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 25 states have (on average 2.04) internal successors, (51), 46 states have internal predecessors, (51), 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) [2021-10-29 05:55:13,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-29 05:55:13,525 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:55:13,525 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-29 05:55:13,526 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-10-29 05:55:13,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:55:13,531 INFO L85 PathProgramCache]: Analyzing trace with hash 3767634, now seen corresponding path program 1 times [2021-10-29 05:55:13,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:55:13,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854973482] [2021-10-29 05:55:13,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:55:13,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:55:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:55:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:55:13,716 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:55:13,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854973482] [2021-10-29 05:55:13,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854973482] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:55:13,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:55:13,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:55:13,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337367153] [2021-10-29 05:55:13,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-29 05:55:13,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:55:13,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-29 05:55:13,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:55:13,757 INFO L87 Difference]: Start difference. First operand has 47 states, 25 states have (on average 2.04) internal successors, (51), 46 states have internal predecessors, (51), 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 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-10-29 05:55:13,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:55:13,773 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-10-29 05:55:13,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 05:55:13,775 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-10-29 05:55:13,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:55:13,784 INFO L225 Difference]: With dead ends: 47 [2021-10-29 05:55:13,784 INFO L226 Difference]: Without dead ends: 46 [2021-10-29 05:55:13,787 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:55:13,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-29 05:55:13,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-10-29 05:55:13,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.96) internal successors, (49), 45 states have internal predecessors, (49), 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) [2021-10-29 05:55:13,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2021-10-29 05:55:13,820 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 4 [2021-10-29 05:55:13,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:55:13,821 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2021-10-29 05:55:13,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-10-29 05:55:13,821 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2021-10-29 05:55:13,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:55:13,822 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:55:13,822 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:55:13,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 05:55:13,823 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-10-29 05:55:13,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:55:13,824 INFO L85 PathProgramCache]: Analyzing trace with hash 116582307, now seen corresponding path program 1 times [2021-10-29 05:55:13,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:55:13,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22139244] [2021-10-29 05:55:13,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:55:13,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:55:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:55:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:55:13,945 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:55:13,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22139244] [2021-10-29 05:55:13,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22139244] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:55:13,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:55:13,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:55:13,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806317665] [2021-10-29 05:55:13,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:55:13,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:55:13,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:55:13,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:55:13,958 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-10-29 05:55:14,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:55:14,004 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2021-10-29 05:55:14,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:55:14,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2021-10-29 05:55:14,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:55:14,006 INFO L225 Difference]: With dead ends: 45 [2021-10-29 05:55:14,006 INFO L226 Difference]: Without dead ends: 45 [2021-10-29 05:55:14,007 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:55:14,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-29 05:55:14,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-10-29 05:55:14,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 25 states have (on average 1.92) internal successors, (48), 44 states have internal predecessors, (48), 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) [2021-10-29 05:55:14,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-10-29 05:55:14,013 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 5 [2021-10-29 05:55:14,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:55:14,014 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-10-29 05:55:14,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-10-29 05:55:14,015 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-10-29 05:55:14,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:55:14,015 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:55:14,015 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:55:14,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-29 05:55:14,016 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-10-29 05:55:14,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:55:14,017 INFO L85 PathProgramCache]: Analyzing trace with hash 116582308, now seen corresponding path program 1 times [2021-10-29 05:55:14,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:55:14,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015334780] [2021-10-29 05:55:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:55:14,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:55:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:55:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:55:14,123 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:55:14,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015334780] [2021-10-29 05:55:14,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015334780] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:55:14,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:55:14,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:55:14,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087892043] [2021-10-29 05:55:14,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:55:14,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:55:14,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:55:14,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:55:14,136 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-10-29 05:55:14,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:55:14,239 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2021-10-29 05:55:14,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:55:14,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2021-10-29 05:55:14,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:55:14,241 INFO L225 Difference]: With dead ends: 88 [2021-10-29 05:55:14,241 INFO L226 Difference]: Without dead ends: 88 [2021-10-29 05:55:14,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:55:14,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-29 05:55:14,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 49. [2021-10-29 05:55:14,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 48 states have internal predecessors, (53), 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) [2021-10-29 05:55:14,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-10-29 05:55:14,249 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 5 [2021-10-29 05:55:14,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:55:14,249 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-10-29 05:55:14,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-10-29 05:55:14,249 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-10-29 05:55:14,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-29 05:55:14,250 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:55:14,250 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:55:14,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-29 05:55:14,251 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-10-29 05:55:14,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:55:14,251 INFO L85 PathProgramCache]: Analyzing trace with hash 366521265, now seen corresponding path program 1 times [2021-10-29 05:55:14,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:55:14,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978402323] [2021-10-29 05:55:14,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:55:14,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:55:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:55:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:55:14,314 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:55:14,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978402323] [2021-10-29 05:55:14,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978402323] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:55:14,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:55:14,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:55:14,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598639772] [2021-10-29 05:55:14,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:55:14,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:55:14,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:55:14,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:55:14,317 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) 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) [2021-10-29 05:55:14,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:55:14,358 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-10-29 05:55:14,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:55:14,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 [2021-10-29 05:55:14,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:55:14,359 INFO L225 Difference]: With dead ends: 46 [2021-10-29 05:55:14,359 INFO L226 Difference]: Without dead ends: 46 [2021-10-29 05:55:14,360 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:55:14,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-29 05:55:14,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-10-29 05:55:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 45 states have internal predecessors, (50), 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) [2021-10-29 05:55:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-10-29 05:55:14,365 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 7 [2021-10-29 05:55:14,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:55:14,365 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-10-29 05:55:14,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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) [2021-10-29 05:55:14,365 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-10-29 05:55:14,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-29 05:55:14,366 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:55:14,366 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:55:14,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-29 05:55:14,366 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-10-29 05:55:14,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:55:14,367 INFO L85 PathProgramCache]: Analyzing trace with hash 366521266, now seen corresponding path program 1 times [2021-10-29 05:55:14,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:55:14,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367285010] [2021-10-29 05:55:14,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:55:14,368 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:55:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:55:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:55:14,468 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:55:14,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367285010] [2021-10-29 05:55:14,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367285010] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:55:14,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:55:14,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 05:55:14,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127181188] [2021-10-29 05:55:14,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-29 05:55:14,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:55:14,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 05:55:14,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:55:14,471 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2021-10-29 05:55:14,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:55:14,553 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2021-10-29 05:55:14,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 05:55:14,554 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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 [2021-10-29 05:55:14,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:55:14,555 INFO L225 Difference]: With dead ends: 79 [2021-10-29 05:55:14,555 INFO L226 Difference]: Without dead ends: 79 [2021-10-29 05:55:14,556 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:55:14,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-29 05:55:14,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 55. [2021-10-29 05:55:14,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 54 states have internal predecessors, (64), 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) [2021-10-29 05:55:14,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-10-29 05:55:14,595 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2021-10-29 05:55:14,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:55:14,595 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-10-29 05:55:14,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2021-10-29 05:55:14,596 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-10-29 05:55:14,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-29 05:55:14,596 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:55:14,596 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-10-29 05:55:14,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-29 05:55:14,597 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-10-29 05:55:14,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:55:14,597 INFO L85 PathProgramCache]: Analyzing trace with hash 368019081, now seen corresponding path program 1 times [2021-10-29 05:55:14,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:55:14,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685748639] [2021-10-29 05:55:14,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:55:14,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:55:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:55:14,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:55:14,690 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:55:14,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685748639] [2021-10-29 05:55:14,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685748639] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 05:55:14,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147075240] [2021-10-29 05:55:14,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:55:14,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:55:14,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:55:14,695 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:55:14,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-29 05:55:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:55:14,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-29 05:55:14,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:55:14,897 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-29 05:55:14,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2021-10-29 05:55:14,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:55:14,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:55:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:55:14,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147075240] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:55:14,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-29 05:55:14,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 7 [2021-10-29 05:55:14,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702241363] [2021-10-29 05:55:14,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-29 05:55:14,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:55:14,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-29 05:55:14,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:55:15,000 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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) [2021-10-29 05:55:15,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:55:15,089 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2021-10-29 05:55:15,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 05:55:15,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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) Word has length 7 [2021-10-29 05:55:15,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:55:15,092 INFO L225 Difference]: With dead ends: 78 [2021-10-29 05:55:15,093 INFO L226 Difference]: Without dead ends: 78 [2021-10-29 05:55:15,095 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-29 05:55:15,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-29 05:55:15,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2021-10-29 05:55:15,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 53 states have internal predecessors, (63), 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) [2021-10-29 05:55:15,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-10-29 05:55:15,116 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 7 [2021-10-29 05:55:15,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:55:15,117 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-10-29 05:55:15,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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) [2021-10-29 05:55:15,117 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-10-29 05:55:15,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-29 05:55:15,118 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:55:15,118 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:55:15,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-29 05:55:15,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:55:15,334 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-10-29 05:55:15,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:55:15,334 INFO L85 PathProgramCache]: Analyzing trace with hash 39678835, now seen corresponding path program 1 times [2021-10-29 05:55:15,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:55:15,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139551599] [2021-10-29 05:55:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:55:15,335 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:55:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:55:15,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:55:15,430 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:55:15,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139551599] [2021-10-29 05:55:15,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139551599] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 05:55:15,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921826874] [2021-10-29 05:55:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:55:15,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:55:15,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:55:15,438 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:55:15,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-29 05:55:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:55:15,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-29 05:55:15,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:55:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:55:15,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:55:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:55:15,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921826874] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:55:15,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-29 05:55:15,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 9 [2021-10-29 05:55:15,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613600863] [2021-10-29 05:55:15,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-29 05:55:15,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:55:15,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-29 05:55:15,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-29 05:55:15,623 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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) [2021-10-29 05:55:15,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:55:15,677 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2021-10-29 05:55:15,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 05:55:15,678 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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) Word has length 9 [2021-10-29 05:55:15,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:55:15,678 INFO L225 Difference]: With dead ends: 76 [2021-10-29 05:55:15,678 INFO L226 Difference]: Without dead ends: 76 [2021-10-29 05:55:15,679 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-29 05:55:15,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-29 05:55:15,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 53. [2021-10-29 05:55:15,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 52 states have internal predecessors, (60), 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) [2021-10-29 05:55:15,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-10-29 05:55:15,689 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 9 [2021-10-29 05:55:15,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:55:15,689 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-10-29 05:55:15,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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) [2021-10-29 05:55:15,689 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-10-29 05:55:15,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-29 05:55:15,690 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:55:15,690 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:55:15,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-29 05:55:15,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:55:15,906 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-10-29 05:55:15,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:55:15,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1479091543, now seen corresponding path program 1 times [2021-10-29 05:55:15,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:55:15,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137081349] [2021-10-29 05:55:15,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:55:15,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:55:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:55:16,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:55:16,007 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:55:16,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137081349] [2021-10-29 05:55:16,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137081349] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 05:55:16,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724079899] [2021-10-29 05:55:16,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:55:16,008 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:55:16,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:55:16,009 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:55:16,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-29 05:55:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:55:16,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-29 05:55:16,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:55:16,142 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-29 05:55:16,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2021-10-29 05:55:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:55:16,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:55:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:55:16,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724079899] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:55:16,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-29 05:55:16,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 11 [2021-10-29 05:55:16,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113779231] [2021-10-29 05:55:16,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:55:16,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:55:16,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:55:16,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-10-29 05:55:16,393 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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) [2021-10-29 05:55:16,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:55:16,689 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2021-10-29 05:55:16,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-29 05:55:16,690 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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 [2021-10-29 05:55:16,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:55:16,691 INFO L225 Difference]: With dead ends: 113 [2021-10-29 05:55:16,691 INFO L226 Difference]: Without dead ends: 113 [2021-10-29 05:55:16,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-10-29 05:55:16,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-29 05:55:16,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 52. [2021-10-29 05:55:16,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 38 states have (on average 1.5) internal successors, (57), 51 states have internal predecessors, (57), 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) [2021-10-29 05:55:16,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2021-10-29 05:55:16,695 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 9 [2021-10-29 05:55:16,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:55:16,695 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2021-10-29 05:55:16,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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) [2021-10-29 05:55:16,696 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2021-10-29 05:55:16,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-29 05:55:16,696 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:55:16,696 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:55:16,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-29 05:55:16,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:55:16,910 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-10-29 05:55:16,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:55:16,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1230114217, now seen corresponding path program 1 times [2021-10-29 05:55:16,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:55:16,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223603262] [2021-10-29 05:55:16,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:55:16,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:55:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:55:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 05:55:16,947 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:55:16,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223603262] [2021-10-29 05:55:16,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223603262] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:55:16,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:55:16,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:55:16,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297281014] [2021-10-29 05:55:16,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:55:16,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:55:16,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:55:16,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:55:16,949 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2021-10-29 05:55:16,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:55:16,989 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-10-29 05:55:16,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:55:16,990 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) Word has length 10 [2021-10-29 05:55:16,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:55:16,990 INFO L225 Difference]: With dead ends: 50 [2021-10-29 05:55:16,990 INFO L226 Difference]: Without dead ends: 50 [2021-10-29 05:55:16,991 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:55:16,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-29 05:55:16,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-10-29 05:55:16,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 49 states have internal predecessors, (55), 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) [2021-10-29 05:55:16,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2021-10-29 05:55:16,994 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 10 [2021-10-29 05:55:16,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:55:16,994 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2021-10-29 05:55:16,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2021-10-29 05:55:16,994 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2021-10-29 05:55:16,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-29 05:55:16,995 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:55:16,995 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:55:16,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-29 05:55:16,995 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-10-29 05:55:16,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:55:16,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1230114218, now seen corresponding path program 1 times [2021-10-29 05:55:16,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:55:16,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198945398] [2021-10-29 05:55:16,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:55:16,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:55:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:55:17,013 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:55:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:55:17,041 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-29 05:55:17,041 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:55:17,042 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-29 05:55:17,044 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-29 05:55:17,045 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-29 05:55:17,045 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-29 05:55:17,045 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-29 05:55:17,045 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-29 05:55:17,045 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-29 05:55:17,045 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-29 05:55:17,046 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:55:17,046 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:55:17,046 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:55:17,046 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:55:17,046 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:55:17,047 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:55:17,047 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:55:17,047 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:55:17,047 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:55:17,047 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:55:17,047 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:55:17,048 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:55:17,048 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK [2021-10-29 05:55:17,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-29 05:55:17,053 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:55:17,056 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:55:17,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:55:17 BoogieIcfgContainer [2021-10-29 05:55:17,080 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:55:17,080 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:55:17,081 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:55:17,081 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:55:17,081 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:55:13" (3/4) ... [2021-10-29 05:55:17,083 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-29 05:55:17,120 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 05:55:17,120 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:55:17,121 INFO L168 Benchmark]: Toolchain (without parser) took 4799.71 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 53.3 MB in the beginning and 35.7 MB in the end (delta: 17.6 MB). Peak memory consumption was 37.3 MB. Max. memory is 16.1 GB. [2021-10-29 05:55:17,121 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 90.2 MB. Free memory was 71.1 MB in the beginning and 71.0 MB in the end (delta: 56.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:55:17,122 INFO L168 Benchmark]: CACSL2BoogieTranslator took 430.95 ms. Allocated memory is still 90.2 MB. Free memory was 53.1 MB in the beginning and 57.6 MB in the end (delta: -4.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 05:55:17,122 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.85 ms. Allocated memory is still 90.2 MB. Free memory was 57.6 MB in the beginning and 55.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:55:17,123 INFO L168 Benchmark]: Boogie Preprocessor took 55.29 ms. Allocated memory is still 90.2 MB. Free memory was 55.7 MB in the beginning and 54.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:55:17,123 INFO L168 Benchmark]: RCFGBuilder took 550.24 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 54.4 MB in the beginning and 86.2 MB in the end (delta: -31.8 MB). Peak memory consumption was 19.2 MB. Max. memory is 16.1 GB. [2021-10-29 05:55:17,123 INFO L168 Benchmark]: TraceAbstraction took 3653.28 ms. Allocated memory is still 109.1 MB. Free memory was 85.7 MB in the beginning and 37.8 MB in the end (delta: 48.0 MB). Peak memory consumption was 47.9 MB. Max. memory is 16.1 GB. [2021-10-29 05:55:17,124 INFO L168 Benchmark]: Witness Printer took 39.74 ms. Allocated memory is still 109.1 MB. Free memory was 37.8 MB in the beginning and 35.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:55:17,126 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 90.2 MB. Free memory was 71.1 MB in the beginning and 71.0 MB in the end (delta: 56.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 430.95 ms. Allocated memory is still 90.2 MB. Free memory was 53.1 MB in the beginning and 57.6 MB in the end (delta: -4.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.85 ms. Allocated memory is still 90.2 MB. Free memory was 57.6 MB in the beginning and 55.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.29 ms. Allocated memory is still 90.2 MB. Free memory was 55.7 MB in the beginning and 54.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 550.24 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 54.4 MB in the beginning and 86.2 MB in the end (delta: -31.8 MB). Peak memory consumption was 19.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3653.28 ms. Allocated memory is still 109.1 MB. Free memory was 85.7 MB in the beginning and 37.8 MB in the end (delta: 48.0 MB). Peak memory consumption was 47.9 MB. Max. memory is 16.1 GB. * Witness Printer took 39.74 ms. Allocated memory is still 109.1 MB. Free memory was 37.8 MB in the beginning and 35.7 MB in the end (delta: 2.1 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 544]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L523] int *a, *b; [L524] int n; [L536] n = 1 VAL [a={0:0}, b={0:0}, n=1] [L537] COND FALSE !(__VERIFIER_nondet_int() && n < 30) [L540] a = malloc(n * sizeof(*a)) [L541] b = malloc(n * sizeof(*b)) [L542] EXPR b++ VAL [a={-2:0}, b={-1:4}, n=1] [L542] *b++ = 0 [L528] int i; [L529] i = 0 VAL [a={-2:0}, b={-1:4}, n=1] [L529] COND TRUE i < n VAL [a={-2:0}, b={-1:4}, n=1] [L530] a[i] = n [L529] i++ VAL [a={-2:0}, b={-1:4}, n=1] [L529] COND FALSE !(i < n) [L531] i = 0 VAL [a={-2:0}, b={-1:4}, n=1] [L531] COND FALSE !(i < n - 1) VAL [a={-2:0}, b={-1:4}, n=1] [L544] b[-2] - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 47 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 3.5s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 362 SDtfs, 636 SDslu, 481 SDs, 0 SdLazy, 412 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=5, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 171 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 526 SizeOfPredicates, 7 NumberOfNonLiveVariables, 210 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 15 InterpolantComputations, 12 PerfectInterpolantSequences, 14/19 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 RESULT: Ultimate proved your program to be incorrect! [2021-10-29 05:55:17,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d508d33-9846-4e40-b2d1-866138196a24/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...