./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-properties/list_flag-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ab5427a-4261-489b-806b-c6505664013b/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ab5427a-4261-489b-806b-c6505664013b/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ab5427a-4261-489b-806b-c6505664013b/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ab5427a-4261-489b-806b-c6505664013b/bin/utaipan-9zjyvhn0QE/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list_flag-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ab5427a-4261-489b-806b-c6505664013b/bin/utaipan-9zjyvhn0QE/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ab5427a-4261-489b-806b-c6505664013b/bin/utaipan-9zjyvhn0QE --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 643182475b6f3736876ef9d58257e821498e53d566e4d81dd06a8f042f299e0b ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 09:32:26,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 09:32:26,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 09:32:26,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 09:32:26,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 09:32:26,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 09:32:26,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 09:32:26,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 09:32:26,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 09:32:26,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 09:32:26,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 09:32:26,929 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 09:32:26,929 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 09:32:26,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 09:32:26,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 09:32:26,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 09:32:26,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 09:32:26,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 09:32:26,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 09:32:26,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 09:32:26,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 09:32:26,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 09:32:26,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 09:32:26,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 09:32:26,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 09:32:26,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 09:32:26,953 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 09:32:26,954 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 09:32:26,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 09:32:26,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 09:32:26,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 09:32:26,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 09:32:26,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 09:32:26,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 09:32:26,960 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 09:32:26,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 09:32:26,962 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 09:32:26,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 09:32:26,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 09:32:26,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 09:32:26,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 09:32:26,966 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ab5427a-4261-489b-806b-c6505664013b/bin/utaipan-9zjyvhn0QE/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2021-10-24 09:32:26,991 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 09:32:26,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 09:32:26,992 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 09:32:26,992 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 09:32:26,993 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 09:32:26,993 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 09:32:26,993 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 09:32:26,994 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 09:32:26,994 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 09:32:26,994 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 09:32:26,995 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 09:32:26,995 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 09:32:26,995 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 09:32:26,995 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 09:32:26,996 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 09:32:26,996 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-24 09:32:26,997 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-24 09:32:26,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 09:32:26,997 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 09:32:26,998 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-24 09:32:26,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 09:32:26,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 09:32:26,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 09:32:26,999 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-24 09:32:26,999 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-24 09:32:26,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 09:32:27,000 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 09:32:27,000 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 09:32:27,000 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 09:32:27,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 09:32:27,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 09:32:27,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:32:27,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 09:32:27,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 09:32:27,002 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 09:32:27,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 09:32:27,002 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 09:32:27,002 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 09:32:27,003 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_5ab5427a-4261-489b-806b-c6505664013b/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ab5427a-4261-489b-806b-c6505664013b/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 643182475b6f3736876ef9d58257e821498e53d566e4d81dd06a8f042f299e0b [2021-10-24 09:32:27,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 09:32:27,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 09:32:27,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 09:32:27,297 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 09:32:27,299 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 09:32:27,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ab5427a-4261-489b-806b-c6505664013b/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/list-properties/list_flag-1.i [2021-10-24 09:32:27,369 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ab5427a-4261-489b-806b-c6505664013b/bin/utaipan-9zjyvhn0QE/data/32387b022/6440046fd8ac47afb2b854b31c27ab80/FLAGd6379fa12 [2021-10-24 09:32:27,822 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 09:32:27,822 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ab5427a-4261-489b-806b-c6505664013b/sv-benchmarks/c/list-properties/list_flag-1.i [2021-10-24 09:32:27,837 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ab5427a-4261-489b-806b-c6505664013b/bin/utaipan-9zjyvhn0QE/data/32387b022/6440046fd8ac47afb2b854b31c27ab80/FLAGd6379fa12 [2021-10-24 09:32:28,177 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ab5427a-4261-489b-806b-c6505664013b/bin/utaipan-9zjyvhn0QE/data/32387b022/6440046fd8ac47afb2b854b31c27ab80 [2021-10-24 09:32:28,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 09:32:28,181 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 09:32:28,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 09:32:28,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 09:32:28,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 09:32:28,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:32:28" (1/1) ... [2021-10-24 09:32:28,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39fdd0bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:28, skipping insertion in model container [2021-10-24 09:32:28,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:32:28" (1/1) ... [2021-10-24 09:32:28,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 09:32:28,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 09:32:28,576 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ab5427a-4261-489b-806b-c6505664013b/sv-benchmarks/c/list-properties/list_flag-1.i[23375,23388] [2021-10-24 09:32:28,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:32:28,592 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 09:32:28,645 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ab5427a-4261-489b-806b-c6505664013b/sv-benchmarks/c/list-properties/list_flag-1.i[23375,23388] [2021-10-24 09:32:28,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:32:28,678 INFO L208 MainTranslator]: Completed translation [2021-10-24 09:32:28,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:28 WrapperNode [2021-10-24 09:32:28,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 09:32:28,680 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 09:32:28,680 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 09:32:28,680 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 09:32:28,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:28" (1/1) ... [2021-10-24 09:32:28,702 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:28" (1/1) ... [2021-10-24 09:32:28,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 09:32:28,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 09:32:28,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 09:32:28,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 09:32:28,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:28" (1/1) ... [2021-10-24 09:32:28,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:28" (1/1) ... [2021-10-24 09:32:28,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:28" (1/1) ... [2021-10-24 09:32:28,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:28" (1/1) ... [2021-10-24 09:32:28,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:28" (1/1) ... [2021-10-24 09:32:28,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:28" (1/1) ... [2021-10-24 09:32:28,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:28" (1/1) ... [2021-10-24 09:32:28,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 09:32:28,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 09:32:28,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 09:32:28,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 09:32:28,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:28" (1/1) ... [2021-10-24 09:32:28,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:32:28,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ab5427a-4261-489b-806b-c6505664013b/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 09:32:28,826 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ab5427a-4261-489b-806b-c6505664013b/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 09:32:28,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ab5427a-4261-489b-806b-c6505664013b/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 09:32:28,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-24 09:32:28,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-24 09:32:28,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-24 09:32:28,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-24 09:32:28,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 09:32:28,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-24 09:32:28,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 09:32:28,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 09:32:28,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 09:32:29,361 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 09:32:29,361 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-24 09:32:29,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:32:29 BoogieIcfgContainer [2021-10-24 09:32:29,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 09:32:29,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 09:32:29,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 09:32:29,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 09:32:29,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 09:32:28" (1/3) ... [2021-10-24 09:32:29,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dcf0360 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:32:29, skipping insertion in model container [2021-10-24 09:32:29,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:28" (2/3) ... [2021-10-24 09:32:29,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dcf0360 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:32:29, skipping insertion in model container [2021-10-24 09:32:29,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:32:29" (3/3) ... [2021-10-24 09:32:29,398 INFO L111 eAbstractionObserver]: Analyzing ICFG list_flag-1.i [2021-10-24 09:32:29,403 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 09:32:29,403 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2021-10-24 09:32:29,493 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 09:32:29,499 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 [2021-10-24 09:32:29,499 INFO L340 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2021-10-24 09:32:29,514 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 25 states have (on average 2.32) internal successors, (58), 47 states have internal predecessors, (58), 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) [2021-10-24 09:32:29,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-24 09:32:29,520 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:32:29,521 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-24 09:32:29,521 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-24 09:32:29,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:32:29,528 INFO L82 PathProgramCache]: Analyzing trace with hash 4550945, now seen corresponding path program 1 times [2021-10-24 09:32:29,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:32:29,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277795080] [2021-10-24 09:32:29,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:32:29,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:32:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:32:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:32:29,674 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 09:32:29,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277795080] [2021-10-24 09:32:29,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277795080] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 09:32:29,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:32:29,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 09:32:29,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35971671] [2021-10-24 09:32:29,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-24 09:32:29,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 09:32:29,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-24 09:32:29,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 09:32:29,698 INFO L87 Difference]: Start difference. First operand has 48 states, 25 states have (on average 2.32) internal successors, (58), 47 states have internal predecessors, (58), 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) [2021-10-24 09:32:29,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:32:29,715 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-10-24 09:32:29,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-24 09:32:29,717 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 [2021-10-24 09:32:29,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:32:29,725 INFO L225 Difference]: With dead ends: 48 [2021-10-24 09:32:29,725 INFO L226 Difference]: Without dead ends: 45 [2021-10-24 09:32:29,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 09:32:29,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-24 09:32:29,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-10-24 09:32:29,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 23 states have (on average 2.130434782608696) internal successors, (49), 44 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) [2021-10-24 09:32:29,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-10-24 09:32:29,754 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 4 [2021-10-24 09:32:29,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:32:29,754 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-10-24 09:32:29,755 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) [2021-10-24 09:32:29,755 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-10-24 09:32:29,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-24 09:32:29,755 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:32:29,756 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-24 09:32:29,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 09:32:29,756 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-24 09:32:29,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:32:29,757 INFO L82 PathProgramCache]: Analyzing trace with hash 141045619, now seen corresponding path program 1 times [2021-10-24 09:32:29,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:32:29,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659764428] [2021-10-24 09:32:29,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:32:29,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:32:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:32:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:32:29,820 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 09:32:29,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659764428] [2021-10-24 09:32:29,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659764428] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 09:32:29,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:32:29,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 09:32:29,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913222961] [2021-10-24 09:32:29,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 09:32:29,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 09:32:29,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 09:32:29,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 09:32:29,824 INFO L87 Difference]: Start difference. First operand 45 states and 49 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) [2021-10-24 09:32:29,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:32:29,964 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-10-24 09:32:29,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 09:32:29,965 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 [2021-10-24 09:32:29,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:32:29,967 INFO L225 Difference]: With dead ends: 53 [2021-10-24 09:32:29,968 INFO L226 Difference]: Without dead ends: 53 [2021-10-24 09:32:29,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 09:32:29,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-24 09:32:29,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2021-10-24 09:32:29,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.903225806451613) internal successors, (59), 47 states have internal predecessors, (59), 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) [2021-10-24 09:32:29,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2021-10-24 09:32:29,975 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 5 [2021-10-24 09:32:29,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:32:29,975 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2021-10-24 09:32:29,976 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) [2021-10-24 09:32:29,976 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2021-10-24 09:32:29,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-24 09:32:29,976 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:32:29,976 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-24 09:32:29,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-24 09:32:29,977 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-24 09:32:29,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:32:29,978 INFO L82 PathProgramCache]: Analyzing trace with hash 141045620, now seen corresponding path program 1 times [2021-10-24 09:32:29,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:32:29,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177990447] [2021-10-24 09:32:29,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:32:29,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:32:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:32:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:32:30,088 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 09:32:30,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177990447] [2021-10-24 09:32:30,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177990447] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 09:32:30,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:32:30,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 09:32:30,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851437936] [2021-10-24 09:32:30,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 09:32:30,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 09:32:30,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 09:32:30,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 09:32:30,092 INFO L87 Difference]: Start difference. First operand 48 states and 59 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) [2021-10-24 09:32:30,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:32:30,211 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2021-10-24 09:32:30,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 09:32:30,211 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 [2021-10-24 09:32:30,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:32:30,213 INFO L225 Difference]: With dead ends: 62 [2021-10-24 09:32:30,213 INFO L226 Difference]: Without dead ends: 62 [2021-10-24 09:32:30,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 09:32:30,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-24 09:32:30,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2021-10-24 09:32:30,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 40 states have (on average 1.625) internal successors, (65), 56 states have internal predecessors, (65), 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) [2021-10-24 09:32:30,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2021-10-24 09:32:30,220 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 5 [2021-10-24 09:32:30,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:32:30,221 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2021-10-24 09:32:30,221 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) [2021-10-24 09:32:30,221 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2021-10-24 09:32:30,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-24 09:32:30,222 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:32:30,222 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:32:30,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-24 09:32:30,223 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-24 09:32:30,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:32:30,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1628513461, now seen corresponding path program 1 times [2021-10-24 09:32:30,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:32:30,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385558120] [2021-10-24 09:32:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:32:30,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:32:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:32:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:32:30,298 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 09:32:30,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385558120] [2021-10-24 09:32:30,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385558120] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 09:32:30,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:32:30,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-24 09:32:30,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115737037] [2021-10-24 09:32:30,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 09:32:30,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 09:32:30,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 09:32:30,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-24 09:32:30,301 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2021-10-24 09:32:30,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:32:30,416 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2021-10-24 09:32:30,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 09:32:30,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 [2021-10-24 09:32:30,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:32:30,418 INFO L225 Difference]: With dead ends: 74 [2021-10-24 09:32:30,418 INFO L226 Difference]: Without dead ends: 74 [2021-10-24 09:32:30,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-24 09:32:30,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-24 09:32:30,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2021-10-24 09:32:30,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 59 states have internal predecessors, (69), 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) [2021-10-24 09:32:30,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2021-10-24 09:32:30,426 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 10 [2021-10-24 09:32:30,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:32:30,427 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2021-10-24 09:32:30,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2021-10-24 09:32:30,427 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2021-10-24 09:32:30,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-24 09:32:30,428 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:32:30,428 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:32:30,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-24 09:32:30,429 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-24 09:32:30,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:32:30,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1648553183, now seen corresponding path program 1 times [2021-10-24 09:32:30,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:32:30,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479800499] [2021-10-24 09:32:30,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:32:30,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:32:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:32:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:32:30,505 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 09:32:30,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479800499] [2021-10-24 09:32:30,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479800499] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 09:32:30,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:32:30,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-24 09:32:30,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748153045] [2021-10-24 09:32:30,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 09:32:30,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 09:32:30,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 09:32:30,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-24 09:32:30,510 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2021-10-24 09:32:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:32:30,635 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2021-10-24 09:32:30,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 09:32:30,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 [2021-10-24 09:32:30,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:32:30,641 INFO L225 Difference]: With dead ends: 73 [2021-10-24 09:32:30,641 INFO L226 Difference]: Without dead ends: 73 [2021-10-24 09:32:30,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-24 09:32:30,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-24 09:32:30,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2021-10-24 09:32:30,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 61 states have internal predecessors, (71), 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) [2021-10-24 09:32:30,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-10-24 09:32:30,662 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 10 [2021-10-24 09:32:30,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:32:30,663 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-10-24 09:32:30,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2021-10-24 09:32:30,664 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-10-24 09:32:30,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-24 09:32:30,665 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:32:30,665 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:32:30,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-24 09:32:30,665 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-24 09:32:30,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:32:30,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1055769671, now seen corresponding path program 1 times [2021-10-24 09:32:30,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:32:30,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935274507] [2021-10-24 09:32:30,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:32:30,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:32:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:32:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:32:30,777 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 09:32:30,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935274507] [2021-10-24 09:32:30,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935274507] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 09:32:30,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:32:30,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-24 09:32:30,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922505444] [2021-10-24 09:32:30,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 09:32:30,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 09:32:30,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 09:32:30,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-24 09:32:30,780 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-10-24 09:32:30,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:32:30,906 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2021-10-24 09:32:30,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 09:32:30,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 11 [2021-10-24 09:32:30,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:32:30,911 INFO L225 Difference]: With dead ends: 71 [2021-10-24 09:32:30,911 INFO L226 Difference]: Without dead ends: 71 [2021-10-24 09:32:30,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-24 09:32:30,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-24 09:32:30,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2021-10-24 09:32:30,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.553191489361702) internal successors, (73), 63 states have internal predecessors, (73), 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) [2021-10-24 09:32:30,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2021-10-24 09:32:30,935 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 11 [2021-10-24 09:32:30,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:32:30,935 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2021-10-24 09:32:30,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-10-24 09:32:30,936 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2021-10-24 09:32:30,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-24 09:32:30,936 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:32:30,936 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:32:30,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-24 09:32:30,937 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-24 09:32:30,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:32:30,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1055769511, now seen corresponding path program 1 times [2021-10-24 09:32:30,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:32:30,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535984711] [2021-10-24 09:32:30,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:32:30,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:32:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 09:32:30,988 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 09:32:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 09:32:31,049 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-24 09:32:31,049 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 09:32:31,050 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK [2021-10-24 09:32:31,051 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-24 09:32:31,051 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-24 09:32:31,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-24 09:32:31,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-24 09:32:31,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-24 09:32:31,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-24 09:32:31,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-24 09:32:31,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-24 09:32:31,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-24 09:32:31,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-24 09:32:31,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-24 09:32:31,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-24 09:32:31,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-24 09:32:31,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-24 09:32:31,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-24 09:32:31,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-24 09:32:31,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-24 09:32:31,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-24 09:32:31,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION [2021-10-24 09:32:31,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION [2021-10-24 09:32:31,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK [2021-10-24 09:32:31,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-24 09:32:31,061 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 09:32:31,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 09:32:31 BoogieIcfgContainer [2021-10-24 09:32:31,081 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 09:32:31,081 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 09:32:31,081 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 09:32:31,082 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 09:32:31,082 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:32:29" (3/4) ... [2021-10-24 09:32:31,084 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-24 09:32:31,119 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ab5427a-4261-489b-806b-c6505664013b/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 09:32:31,119 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 09:32:31,121 INFO L168 Benchmark]: Toolchain (without parser) took 2939.39 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 52.3 MB in the beginning and 69.7 MB in the end (delta: -17.4 MB). Peak memory consumption was 898.2 kB. Max. memory is 16.1 GB. [2021-10-24 09:32:31,121 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 88.1 MB. Free memory was 57.8 MB in the beginning and 57.7 MB in the end (delta: 25.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 09:32:31,122 INFO L168 Benchmark]: CACSL2BoogieTranslator took 496.98 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 52.1 MB in the beginning and 76.7 MB in the end (delta: -24.6 MB). Peak memory consumption was 5.8 MB. Max. memory is 16.1 GB. [2021-10-24 09:32:31,122 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.59 ms. Allocated memory is still 107.0 MB. Free memory was 76.7 MB in the beginning and 75.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 09:32:31,123 INFO L168 Benchmark]: Boogie Preprocessor took 62.13 ms. Allocated memory is still 107.0 MB. Free memory was 75.0 MB in the beginning and 73.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 09:32:31,123 INFO L168 Benchmark]: RCFGBuilder took 577.17 ms. Allocated memory is still 107.0 MB. Free memory was 73.2 MB in the beginning and 57.7 MB in the end (delta: 15.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-24 09:32:31,124 INFO L168 Benchmark]: TraceAbstraction took 1715.09 ms. Allocated memory is still 107.0 MB. Free memory was 57.4 MB in the beginning and 71.3 MB in the end (delta: -14.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 09:32:31,124 INFO L168 Benchmark]: Witness Printer took 38.22 ms. Allocated memory is still 107.0 MB. Free memory was 71.3 MB in the beginning and 69.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 09:32:31,127 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 88.1 MB. Free memory was 57.8 MB in the beginning and 57.7 MB in the end (delta: 25.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 496.98 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 52.1 MB in the beginning and 76.7 MB in the end (delta: -24.6 MB). Peak memory consumption was 5.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.59 ms. Allocated memory is still 107.0 MB. Free memory was 76.7 MB in the beginning and 75.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 62.13 ms. Allocated memory is still 107.0 MB. Free memory was 75.0 MB in the beginning and 73.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 577.17 ms. Allocated memory is still 107.0 MB. Free memory was 73.2 MB in the beginning and 57.7 MB in the end (delta: 15.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1715.09 ms. Allocated memory is still 107.0 MB. Free memory was 57.4 MB in the beginning and 71.3 MB in the end (delta: -14.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 38.22 ms. Allocated memory is still 107.0 MB. Free memory was 71.3 MB in the beginning and 69.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 531]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L532] int flag = __VERIFIER_nondet_int(); [L533] List p, a, t; [L534] a = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(a == 0) [L536] p = a [L537] COND FALSE !(__VERIFIER_nondet_int()) [L548] p->h = 3 [L549] p = a [L550] COND TRUE \read(flag) [L551] EXPR p->h [L551] COND FALSE !(p->h == 2) [L556] EXPR p->h [L556] COND FALSE !(p->h != 3) - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: 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 pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: 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, 48 locations, 22 error locations. Started 1 CEGAR loops. OverallTime: 1566.9ms, OverallIterations: 7, TraceHistogramMax: 1, EmptinessCheckTime: 13.9ms, AutomataDifference: 696.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 191 SDtfs, 281 SDslu, 214 SDs, 0 SdLazy, 320 SolverSat, 51 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 366.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 134.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=6, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 79.3ms AutomataMinimizationTime, 6 MinimizatonAttempts, 42 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 25.6ms SsaConstructionTime, 151.2ms SatisfiabilityAnalysisTime, 312.4ms InterpolantComputationTime, 56 NumberOfCodeBlocks, 56 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 39 ConstructedInterpolants, 0 QuantifiedInterpolants, 195 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-24 09:32:31,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ab5427a-4261-489b-806b-c6505664013b/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...