./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/simple_built_from_end.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P --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 0eb3d3e07cae1efa9dc9af5091aea6a309746434756c62bcf3ece83b84aec27a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:36:37,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:36:37,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:36:37,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:36:37,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:36:37,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:36:37,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:36:37,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:36:37,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:36:37,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:36:37,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:36:37,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:36:37,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:36:37,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:36:37,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:36:37,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:36:37,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:36:37,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:36:37,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:36:37,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:36:37,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:36:37,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:36:37,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:36:37,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:36:37,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:36:37,920 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:36:37,920 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:36:37,921 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:36:37,922 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:36:37,923 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:36:37,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:36:37,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:36:37,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:36:37,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:36:37,927 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:36:37,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:36:37,928 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:36:37,929 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:36:37,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:36:37,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:36:37,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:36:37,931 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-20 23:36:37,955 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:36:37,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:36:37,956 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:36:37,956 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:36:37,957 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:36:37,957 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:36:37,957 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:36:37,958 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:36:37,958 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:36:37,958 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:36:37,958 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:36:37,958 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:36:37,959 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:36:37,959 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:36:37,959 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:36:37,959 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:36:37,960 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:36:37,960 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:36:37,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 23:36:37,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 23:36:37,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:36:37,961 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:36:37,962 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 23:36:37,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:36:37,962 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:36:37,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:36:37,962 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 23:36:37,963 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 23:36:37,963 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 23:36:37,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:36:37,963 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 23:36:37,963 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:36:37,964 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:36:37,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:36:37,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:36:37,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:36:37,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:36:37,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:36:37,965 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:36:37,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:36:37,965 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:36:37,965 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:36:37,966 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_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0eb3d3e07cae1efa9dc9af5091aea6a309746434756c62bcf3ece83b84aec27a [2021-11-20 23:36:38,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:36:38,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:36:38,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:36:38,254 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:36:38,254 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:36:38,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-11-20 23:36:38,349 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/data/646e32bb6/d720f913a457487da37fccecf1ab3c4c/FLAGe45d221eb [2021-11-20 23:36:38,939 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:36:38,939 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-11-20 23:36:38,955 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/data/646e32bb6/d720f913a457487da37fccecf1ab3c4c/FLAGe45d221eb [2021-11-20 23:36:39,237 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/data/646e32bb6/d720f913a457487da37fccecf1ab3c4c [2021-11-20 23:36:39,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:36:39,244 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:36:39,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:36:39,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:36:39,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:36:39,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:36:39" (1/1) ... [2021-11-20 23:36:39,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44c6e391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:39, skipping insertion in model container [2021-11-20 23:36:39,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:36:39" (1/1) ... [2021-11-20 23:36:39,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:36:39,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:36:39,665 WARN L230 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_c1372c88-0a7e-4f3d-b244-a98220ff8e50/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-11-20 23:36:39,671 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:36:39,683 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:36:39,718 WARN L230 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_c1372c88-0a7e-4f3d-b244-a98220ff8e50/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-11-20 23:36:39,722 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:36:39,758 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:36:39,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:39 WrapperNode [2021-11-20 23:36:39,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:36:39,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:36:39,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:36:39,760 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:36:39,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:39" (1/1) ... [2021-11-20 23:36:39,807 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:39" (1/1) ... [2021-11-20 23:36:39,825 INFO L137 Inliner]: procedures = 124, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2021-11-20 23:36:39,826 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:36:39,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:36:39,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:36:39,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:36:39,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:39" (1/1) ... [2021-11-20 23:36:39,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:39" (1/1) ... [2021-11-20 23:36:39,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:39" (1/1) ... [2021-11-20 23:36:39,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:39" (1/1) ... [2021-11-20 23:36:39,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:39" (1/1) ... [2021-11-20 23:36:39,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:39" (1/1) ... [2021-11-20 23:36:39,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:39" (1/1) ... [2021-11-20 23:36:39,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:36:39,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:36:39,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:36:39,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:36:39,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:39" (1/1) ... [2021-11-20 23:36:39,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:36:39,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:36:39,887 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:36:39,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:36:39,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:36:39,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:36:39,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:36:39,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:36:39,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:36:39,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:36:39,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:36:39,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:36:39,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:36:40,011 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:36:40,013 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:36:40,191 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:36:40,225 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:36:40,225 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 23:36:40,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:36:40 BoogieIcfgContainer [2021-11-20 23:36:40,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:36:40,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:36:40,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:36:40,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:36:40,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:36:39" (1/3) ... [2021-11-20 23:36:40,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b63e39b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:36:40, skipping insertion in model container [2021-11-20 23:36:40,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:39" (2/3) ... [2021-11-20 23:36:40,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b63e39b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:36:40, skipping insertion in model container [2021-11-20 23:36:40,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:36:40" (3/3) ... [2021-11-20 23:36:40,240 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2021-11-20 23:36:40,246 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:36:40,246 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-20 23:36:40,305 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:36:40,316 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 [2021-11-20 23:36:40,316 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-20 23:36:40,333 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 23 states have internal predecessors, (28), 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) [2021-11-20 23:36:40,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-20 23:36:40,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:40,351 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-20 23:36:40,351 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-11-20 23:36:40,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:40,357 INFO L85 PathProgramCache]: Analyzing trace with hash 2799543, now seen corresponding path program 1 times [2021-11-20 23:36:40,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:40,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089606969] [2021-11-20 23:36:40,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:40,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:40,542 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:40,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089606969] [2021-11-20 23:36:40,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089606969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:40,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:40,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:36:40,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093693160] [2021-11-20 23:36:40,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:40,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 23:36:40,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:40,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 23:36:40,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:36:40,588 INFO L87 Difference]: Start difference. First operand has 24 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 23 states have internal predecessors, (28), 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) [2021-11-20 23:36:40,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:40,626 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-11-20 23:36:40,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 23:36:40,629 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 [2021-11-20 23:36:40,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:40,637 INFO L225 Difference]: With dead ends: 24 [2021-11-20 23:36:40,637 INFO L226 Difference]: Without dead ends: 22 [2021-11-20 23:36:40,639 INFO L932 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 [2021-11-20 23:36:40,645 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:40,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:36:40,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-20 23:36:40,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-20 23:36:40,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 21 states have internal predecessors, (23), 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) [2021-11-20 23:36:40,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-20 23:36:40,679 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 4 [2021-11-20 23:36:40,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:40,680 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-20 23:36:40,680 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) [2021-11-20 23:36:40,681 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-20 23:36:40,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 23:36:40,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:40,682 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 23:36:40,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:36:40,683 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-11-20 23:36:40,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:40,684 INFO L85 PathProgramCache]: Analyzing trace with hash 86107672, now seen corresponding path program 1 times [2021-11-20 23:36:40,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:40,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788363772] [2021-11-20 23:36:40,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:40,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:40,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:40,767 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:40,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788363772] [2021-11-20 23:36:40,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788363772] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:40,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:40,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-20 23:36:40,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038455371] [2021-11-20 23:36:40,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:40,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:36:40,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:40,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:36:40,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:36:40,771 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-11-20 23:36:40,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:40,824 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-11-20 23:36:40,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:36:40,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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 [2021-11-20 23:36:40,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:40,827 INFO L225 Difference]: With dead ends: 35 [2021-11-20 23:36:40,827 INFO L226 Difference]: Without dead ends: 34 [2021-11-20 23:36:40,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:36:40,834 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:40,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 26 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:36:40,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-20 23:36:40,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2021-11-20 23:36:40,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 27 states have internal predecessors, (35), 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) [2021-11-20 23:36:40,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-11-20 23:36:40,841 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 5 [2021-11-20 23:36:40,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:40,841 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-11-20 23:36:40,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-11-20 23:36:40,842 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-11-20 23:36:40,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 23:36:40,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:40,842 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 23:36:40,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:36:40,843 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-11-20 23:36:40,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:40,843 INFO L85 PathProgramCache]: Analyzing trace with hash 86106786, now seen corresponding path program 1 times [2021-11-20 23:36:40,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:40,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809523557] [2021-11-20 23:36:40,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:40,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:40,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:40,914 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:40,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809523557] [2021-11-20 23:36:40,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809523557] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:40,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:40,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:36:40,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776178230] [2021-11-20 23:36:40,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:40,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:36:40,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:40,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:36:40,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:36:40,919 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 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) [2021-11-20 23:36:40,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:40,941 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-11-20 23:36:40,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:36:40,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 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 [2021-11-20 23:36:40,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:40,943 INFO L225 Difference]: With dead ends: 32 [2021-11-20 23:36:40,943 INFO L226 Difference]: Without dead ends: 31 [2021-11-20 23:36:40,943 INFO L932 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 [2021-11-20 23:36:40,945 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:40,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 31 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:36:40,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-20 23:36:40,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2021-11-20 23:36:40,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 23 states have internal predecessors, (25), 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) [2021-11-20 23:36:40,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-20 23:36:40,953 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 5 [2021-11-20 23:36:40,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:40,953 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-20 23:36:40,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 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) [2021-11-20 23:36:40,954 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-20 23:36:40,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 23:36:40,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:40,955 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 23:36:40,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:36:40,956 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-11-20 23:36:40,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:40,957 INFO L85 PathProgramCache]: Analyzing trace with hash 86108101, now seen corresponding path program 1 times [2021-11-20 23:36:40,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:40,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760206160] [2021-11-20 23:36:40,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:40,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:40,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:41,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:41,024 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:41,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760206160] [2021-11-20 23:36:41,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760206160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:41,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:41,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:36:41,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258395696] [2021-11-20 23:36:41,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:41,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:36:41,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:41,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:36:41,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:36:41,028 INFO L87 Difference]: Start difference. First operand 24 states and 25 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) [2021-11-20 23:36:41,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:41,068 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-11-20 23:36:41,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:36:41,084 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 [2021-11-20 23:36:41,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:41,085 INFO L225 Difference]: With dead ends: 22 [2021-11-20 23:36:41,085 INFO L226 Difference]: Without dead ends: 22 [2021-11-20 23:36:41,085 INFO L932 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 [2021-11-20 23:36:41,087 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:41,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 11 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:36:41,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-20 23:36:41,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-20 23:36:41,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 21 states have internal predecessors, (23), 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) [2021-11-20 23:36:41,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-20 23:36:41,091 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 5 [2021-11-20 23:36:41,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:41,091 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-20 23:36:41,091 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) [2021-11-20 23:36:41,091 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-20 23:36:41,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 23:36:41,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:41,092 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 23:36:41,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:36:41,092 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-11-20 23:36:41,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:41,093 INFO L85 PathProgramCache]: Analyzing trace with hash 86108102, now seen corresponding path program 1 times [2021-11-20 23:36:41,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:41,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411004674] [2021-11-20 23:36:41,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:41,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:41,162 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:41,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411004674] [2021-11-20 23:36:41,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411004674] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:41,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:41,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:36:41,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540290643] [2021-11-20 23:36:41,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:41,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:36:41,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:41,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:36:41,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:36:41,164 INFO L87 Difference]: Start difference. First operand 22 states and 23 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) [2021-11-20 23:36:41,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:41,181 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-11-20 23:36:41,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:36:41,182 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 [2021-11-20 23:36:41,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:41,182 INFO L225 Difference]: With dead ends: 20 [2021-11-20 23:36:41,183 INFO L226 Difference]: Without dead ends: 20 [2021-11-20 23:36:41,183 INFO L932 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 [2021-11-20 23:36:41,184 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:41,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 12 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:36:41,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-20 23:36:41,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-20 23:36:41,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.5) internal successors, (21), 19 states have internal predecessors, (21), 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) [2021-11-20 23:36:41,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-11-20 23:36:41,188 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 5 [2021-11-20 23:36:41,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:41,189 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-11-20 23:36:41,189 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) [2021-11-20 23:36:41,189 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-11-20 23:36:41,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 23:36:41,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:41,190 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:41,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:36:41,190 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-11-20 23:36:41,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:41,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1997172937, now seen corresponding path program 1 times [2021-11-20 23:36:41,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:41,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797148187] [2021-11-20 23:36:41,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:41,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:41,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:41,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797148187] [2021-11-20 23:36:41,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797148187] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:41,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:41,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:36:41,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674704346] [2021-11-20 23:36:41,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:41,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:36:41,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:41,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:36:41,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:36:41,237 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.5) 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) [2021-11-20 23:36:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:41,299 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2021-11-20 23:36:41,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:36:41,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) 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 [2021-11-20 23:36:41,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:41,301 INFO L225 Difference]: With dead ends: 33 [2021-11-20 23:36:41,301 INFO L226 Difference]: Without dead ends: 33 [2021-11-20 23:36:41,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:36:41,302 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:41,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 16 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:36:41,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-20 23:36:41,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 21. [2021-11-20 23:36:41,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 20 states have internal predecessors, (22), 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) [2021-11-20 23:36:41,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-11-20 23:36:41,319 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 10 [2021-11-20 23:36:41,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:41,319 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-11-20 23:36:41,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) 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) [2021-11-20 23:36:41,320 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-11-20 23:36:41,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 23:36:41,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:41,321 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:41,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:36:41,322 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-11-20 23:36:41,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:41,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1997173823, now seen corresponding path program 1 times [2021-11-20 23:36:41,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:41,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945913192] [2021-11-20 23:36:41,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:41,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:41,403 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:41,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945913192] [2021-11-20 23:36:41,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945913192] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:41,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:41,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:36:41,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469931895] [2021-11-20 23:36:41,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:41,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:36:41,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:41,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:36:41,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:36:41,406 INFO L87 Difference]: Start difference. First operand 21 states and 22 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) [2021-11-20 23:36:41,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:41,493 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-11-20 23:36:41,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:36:41,494 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 [2021-11-20 23:36:41,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:41,494 INFO L225 Difference]: With dead ends: 25 [2021-11-20 23:36:41,494 INFO L226 Difference]: Without dead ends: 25 [2021-11-20 23:36:41,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:36:41,496 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 25 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:41,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 9 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:36:41,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-20 23:36:41,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-11-20 23:36:41,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 20 states have internal predecessors, (23), 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) [2021-11-20 23:36:41,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-11-20 23:36:41,499 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2021-11-20 23:36:41,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:41,500 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-11-20 23:36:41,500 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) [2021-11-20 23:36:41,500 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-11-20 23:36:41,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 23:36:41,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:41,501 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:41,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:36:41,501 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-11-20 23:36:41,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:41,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1997173822, now seen corresponding path program 1 times [2021-11-20 23:36:41,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:41,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146236968] [2021-11-20 23:36:41,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:41,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:41,609 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:41,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146236968] [2021-11-20 23:36:41,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146236968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:41,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:41,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:36:41,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65805753] [2021-11-20 23:36:41,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:41,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:36:41,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:41,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:36:41,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:36:41,613 INFO L87 Difference]: Start difference. First operand 21 states and 23 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) [2021-11-20 23:36:41,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:41,688 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-20 23:36:41,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:36:41,689 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 [2021-11-20 23:36:41,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:41,690 INFO L225 Difference]: With dead ends: 28 [2021-11-20 23:36:41,693 INFO L226 Difference]: Without dead ends: 28 [2021-11-20 23:36:41,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:36:41,695 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:41,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 15 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:36:41,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-20 23:36:41,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2021-11-20 23:36:41,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 22 states have internal predecessors, (25), 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) [2021-11-20 23:36:41,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-11-20 23:36:41,706 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2021-11-20 23:36:41,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:41,706 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-11-20 23:36:41,706 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) [2021-11-20 23:36:41,707 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-11-20 23:36:41,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 23:36:41,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:41,710 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:41,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 23:36:41,711 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-11-20 23:36:41,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:41,712 INFO L85 PathProgramCache]: Analyzing trace with hash 566337826, now seen corresponding path program 1 times [2021-11-20 23:36:41,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:41,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039923201] [2021-11-20 23:36:41,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:41,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:41,804 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:41,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039923201] [2021-11-20 23:36:41,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039923201] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:41,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:41,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:36:41,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870465239] [2021-11-20 23:36:41,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:41,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:36:41,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:41,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:36:41,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:36:41,806 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-11-20 23:36:41,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:41,854 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-11-20 23:36:41,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:36:41,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 12 [2021-11-20 23:36:41,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:41,855 INFO L225 Difference]: With dead ends: 26 [2021-11-20 23:36:41,855 INFO L226 Difference]: Without dead ends: 26 [2021-11-20 23:36:41,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:36:41,857 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:41,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 35 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:36:41,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-20 23:36:41,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-11-20 23:36:41,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 22 states have internal predecessors, (24), 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) [2021-11-20 23:36:41,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-11-20 23:36:41,861 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 12 [2021-11-20 23:36:41,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:41,861 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-11-20 23:36:41,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-11-20 23:36:41,861 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-11-20 23:36:41,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 23:36:41,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:41,862 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:41,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 23:36:41,862 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-11-20 23:36:41,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:41,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1210029403, now seen corresponding path program 1 times [2021-11-20 23:36:41,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:41,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682700640] [2021-11-20 23:36:41,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:41,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 23:36:41,900 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 23:36:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 23:36:41,953 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-20 23:36:41,953 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 23:36:41,954 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK (9 of 10 remaining) [2021-11-20 23:36:41,956 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (8 of 10 remaining) [2021-11-20 23:36:41,956 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (7 of 10 remaining) [2021-11-20 23:36:41,956 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (6 of 10 remaining) [2021-11-20 23:36:41,956 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (5 of 10 remaining) [2021-11-20 23:36:41,956 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (4 of 10 remaining) [2021-11-20 23:36:41,956 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (3 of 10 remaining) [2021-11-20 23:36:41,957 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2021-11-20 23:36:41,957 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (1 of 10 remaining) [2021-11-20 23:36:41,957 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (0 of 10 remaining) [2021-11-20 23:36:41,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 23:36:41,960 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:41,963 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 23:36:41,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 11:36:41 BoogieIcfgContainer [2021-11-20 23:36:41,997 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 23:36:41,997 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 23:36:41,997 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 23:36:41,997 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 23:36:41,998 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:36:40" (3/4) ... [2021-11-20 23:36:42,003 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-20 23:36:42,004 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 23:36:42,004 INFO L158 Benchmark]: Toolchain (without parser) took 2760.58ms. Allocated memory is still 134.2MB. Free memory was 98.3MB in the beginning and 104.4MB in the end (delta: -6.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:36:42,005 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 90.2MB. Free memory is still 44.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:36:42,005 INFO L158 Benchmark]: CACSL2BoogieTranslator took 511.14ms. Allocated memory is still 134.2MB. Free memory was 98.1MB in the beginning and 100.5MB in the end (delta: -2.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-20 23:36:42,006 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.98ms. Allocated memory is still 134.2MB. Free memory was 100.5MB in the beginning and 98.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:36:42,006 INFO L158 Benchmark]: Boogie Preprocessor took 26.48ms. Allocated memory is still 134.2MB. Free memory was 98.8MB in the beginning and 97.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:36:42,006 INFO L158 Benchmark]: RCFGBuilder took 374.92ms. Allocated memory is still 134.2MB. Free memory was 97.3MB in the beginning and 85.8MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 23:36:42,007 INFO L158 Benchmark]: TraceAbstraction took 1766.61ms. Allocated memory is still 134.2MB. Free memory was 85.3MB in the beginning and 104.4MB in the end (delta: -19.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:36:42,007 INFO L158 Benchmark]: Witness Printer took 6.55ms. Allocated memory is still 134.2MB. Free memory is still 104.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:36:42,010 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 90.2MB. Free memory is still 44.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 511.14ms. Allocated memory is still 134.2MB. Free memory was 98.1MB in the beginning and 100.5MB in the end (delta: -2.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.98ms. Allocated memory is still 134.2MB. Free memory was 100.5MB in the beginning and 98.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.48ms. Allocated memory is still 134.2MB. Free memory was 98.8MB in the beginning and 97.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 374.92ms. Allocated memory is still 134.2MB. Free memory was 97.3MB in the beginning and 85.8MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1766.61ms. Allocated memory is still 134.2MB. Free memory was 85.3MB in the beginning and 104.4MB in the end (delta: -19.0MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 6.55ms. Allocated memory is still 134.2MB. Free memory is still 104.4MB. There was no memory consumed. Max. memory is 16.1GB. * 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 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List t; [L533] List p = 0; VAL [p={0:0}] [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) VAL [p={0:0}, t={-1:0}] [L537] t->h = 1 VAL [p={0:0}, t={-1:0}] [L538] t->n = p [L539] p = t VAL [p={-1:0}, t={-1:0}] [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 VAL [p={-1:0}, t={-1:0}] [L542] EXPR p->h VAL [p={-1:0}, p->h=1, t={-1:0}] [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n [L545] p = p->n [L541] COND FALSE !(p!=0) VAL [p={0:0}, t={-1:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: 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: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed 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. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 1.7s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 156 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 156 mSDsluCounter, 176 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 63 mSDsCounter, 17 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 174 IncrementalHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17 mSolverCounterUnsat, 115 mSDtfsCounter, 174 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=2, InterpolantAutomatonStates: 32, 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, 37 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 57 ConstructedInterpolants, 0 QuantifiedInterpolants, 233 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 8/8 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 could not prove your program: unable to determine feasibility of some traces [2021-11-20 23:36:42,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P --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 0eb3d3e07cae1efa9dc9af5091aea6a309746434756c62bcf3ece83b84aec27a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:36:44,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:36:44,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:36:44,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:36:44,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:36:44,574 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:36:44,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:36:44,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:36:44,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:36:44,591 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:36:44,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:36:44,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:36:44,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:36:44,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:36:44,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:36:44,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:36:44,606 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:36:44,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:36:44,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:36:44,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:36:44,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:36:44,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:36:44,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:36:44,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:36:44,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:36:44,637 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:36:44,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:36:44,640 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:36:44,641 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:36:44,642 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:36:44,642 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:36:44,643 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:36:44,645 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:36:44,646 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:36:44,647 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:36:44,647 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:36:44,648 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:36:44,648 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:36:44,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:36:44,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:36:44,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:36:44,656 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-20 23:36:44,709 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:36:44,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:36:44,711 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:36:44,711 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:36:44,712 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:36:44,712 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:36:44,713 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:36:44,713 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:36:44,713 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:36:44,713 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:36:44,714 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:36:44,715 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:36:44,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 23:36:44,716 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 23:36:44,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:36:44,717 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:36:44,717 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 23:36:44,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:36:44,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:36:44,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:36:44,718 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 23:36:44,718 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 23:36:44,719 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 23:36:44,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:36:44,719 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 23:36:44,720 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 23:36:44,720 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 23:36:44,720 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:36:44,720 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:36:44,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:36:44,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 23:36:44,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:36:44,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:36:44,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:36:44,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:36:44,723 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-20 23:36:44,723 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 23:36:44,723 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:36:44,724 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:36:44,724 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0eb3d3e07cae1efa9dc9af5091aea6a309746434756c62bcf3ece83b84aec27a [2021-11-20 23:36:45,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:36:45,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:36:45,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:36:45,085 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:36:45,086 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:36:45,087 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-11-20 23:36:45,159 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/data/af3a0d59f/98421faa65c74120bdf9216a6d4bbe27/FLAGc6250add6 [2021-11-20 23:36:45,812 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:36:45,813 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-11-20 23:36:45,831 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/data/af3a0d59f/98421faa65c74120bdf9216a6d4bbe27/FLAGc6250add6 [2021-11-20 23:36:46,119 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/data/af3a0d59f/98421faa65c74120bdf9216a6d4bbe27 [2021-11-20 23:36:46,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:36:46,123 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:36:46,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:36:46,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:36:46,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:36:46,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:36:46" (1/1) ... [2021-11-20 23:36:46,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52b9f4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:46, skipping insertion in model container [2021-11-20 23:36:46,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:36:46" (1/1) ... [2021-11-20 23:36:46,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:36:46,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:36:46,524 WARN L230 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_c1372c88-0a7e-4f3d-b244-a98220ff8e50/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-11-20 23:36:46,528 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:36:46,545 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:36:46,607 WARN L230 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_c1372c88-0a7e-4f3d-b244-a98220ff8e50/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-11-20 23:36:46,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:36:46,661 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:36:46,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:46 WrapperNode [2021-11-20 23:36:46,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:36:46,663 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:36:46,663 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:36:46,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:36:46,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:46" (1/1) ... [2021-11-20 23:36:46,705 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:46" (1/1) ... [2021-11-20 23:36:46,730 INFO L137 Inliner]: procedures = 127, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2021-11-20 23:36:46,730 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:36:46,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:36:46,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:36:46,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:36:46,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:46" (1/1) ... [2021-11-20 23:36:46,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:46" (1/1) ... [2021-11-20 23:36:46,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:46" (1/1) ... [2021-11-20 23:36:46,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:46" (1/1) ... [2021-11-20 23:36:46,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:46" (1/1) ... [2021-11-20 23:36:46,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:46" (1/1) ... [2021-11-20 23:36:46,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:46" (1/1) ... [2021-11-20 23:36:46,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:36:46,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:36:46,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:36:46,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:36:46,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:46" (1/1) ... [2021-11-20 23:36:46,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:36:46,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:36:46,832 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:36:46,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:36:46,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 23:36:46,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:36:46,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:36:46,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:36:46,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:36:46,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 23:36:46,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 23:36:46,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:36:46,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:36:46,998 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:36:47,000 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:36:47,238 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:36:47,244 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:36:47,260 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 23:36:47,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:36:47 BoogieIcfgContainer [2021-11-20 23:36:47,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:36:47,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:36:47,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:36:47,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:36:47,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:36:46" (1/3) ... [2021-11-20 23:36:47,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c06e429 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:36:47, skipping insertion in model container [2021-11-20 23:36:47,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:46" (2/3) ... [2021-11-20 23:36:47,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c06e429 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:36:47, skipping insertion in model container [2021-11-20 23:36:47,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:36:47" (3/3) ... [2021-11-20 23:36:47,269 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2021-11-20 23:36:47,274 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:36:47,288 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-20 23:36:47,388 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:36:47,399 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 [2021-11-20 23:36:47,399 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-20 23:36:47,426 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 2.0) internal successors, (32), 26 states have internal predecessors, (32), 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) [2021-11-20 23:36:47,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 23:36:47,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:47,442 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 23:36:47,442 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-11-20 23:36:47,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:47,449 INFO L85 PathProgramCache]: Analyzing trace with hash 28698492, now seen corresponding path program 1 times [2021-11-20 23:36:47,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:36:47,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663315726] [2021-11-20 23:36:47,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:47,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:36:47,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:36:47,466 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:36:47,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 23:36:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:47,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:36:47,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:47,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:47,644 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:36:47,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663315726] [2021-11-20 23:36:47,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663315726] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:47,645 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:47,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 23:36:47,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005501497] [2021-11-20 23:36:47,648 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:47,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:36:47,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:36:47,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:36:47,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:36:47,687 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 2.0) internal successors, (32), 26 states have internal predecessors, (32), 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 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) [2021-11-20 23:36:47,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:47,759 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-11-20 23:36:47,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:36:47,761 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 [2021-11-20 23:36:47,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:47,769 INFO L225 Difference]: With dead ends: 40 [2021-11-20 23:36:47,769 INFO L226 Difference]: Without dead ends: 36 [2021-11-20 23:36:47,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:36:47,775 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 13 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:47,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 38 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:36:47,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-20 23:36:47,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-11-20 23:36:47,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.85) internal successors, (37), 29 states have internal predecessors, (37), 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) [2021-11-20 23:36:47,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-11-20 23:36:47,808 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 5 [2021-11-20 23:36:47,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:47,809 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-11-20 23:36:47,809 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) [2021-11-20 23:36:47,809 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-11-20 23:36:47,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 23:36:47,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:47,810 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 23:36:47,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:48,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:36:48,022 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-11-20 23:36:48,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:48,022 INFO L85 PathProgramCache]: Analyzing trace with hash 28698536, now seen corresponding path program 1 times [2021-11-20 23:36:48,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:36:48,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037471624] [2021-11-20 23:36:48,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:48,023 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:36:48,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:36:48,033 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:36:48,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 23:36:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:48,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:36:48,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:48,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:48,198 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:36:48,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037471624] [2021-11-20 23:36:48,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037471624] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:48,199 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:48,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 23:36:48,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778758140] [2021-11-20 23:36:48,200 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:48,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:36:48,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:36:48,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:36:48,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:36:48,202 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 3 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) [2021-11-20 23:36:48,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:48,244 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-11-20 23:36:48,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:36:48,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 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 [2021-11-20 23:36:48,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:48,246 INFO L225 Difference]: With dead ends: 34 [2021-11-20 23:36:48,246 INFO L226 Difference]: Without dead ends: 33 [2021-11-20 23:36:48,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:36:48,248 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:48,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 36 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:36:48,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-20 23:36:48,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2021-11-20 23:36:48,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 24 states have internal predecessors, (26), 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) [2021-11-20 23:36:48,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-11-20 23:36:48,254 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 5 [2021-11-20 23:36:48,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:48,254 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-11-20 23:36:48,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2021-11-20 23:36:48,255 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-11-20 23:36:48,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 23:36:48,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:48,256 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 23:36:48,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:48,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:36:48,466 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-11-20 23:36:48,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:48,467 INFO L85 PathProgramCache]: Analyzing trace with hash 28699851, now seen corresponding path program 1 times [2021-11-20 23:36:48,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:36:48,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293811152] [2021-11-20 23:36:48,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:48,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:36:48,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:36:48,471 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:36:48,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 23:36:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:48,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:36:48,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:48,565 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:36:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:48,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:48,620 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:36:48,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293811152] [2021-11-20 23:36:48,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293811152] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:48,621 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:48,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 23:36:48,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989907780] [2021-11-20 23:36:48,624 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:48,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:36:48,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:36:48,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:36:48,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:36:48,628 INFO L87 Difference]: Start difference. First operand 25 states and 26 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) [2021-11-20 23:36:48,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:48,690 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2021-11-20 23:36:48,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:36:48,690 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 [2021-11-20 23:36:48,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:48,691 INFO L225 Difference]: With dead ends: 23 [2021-11-20 23:36:48,691 INFO L226 Difference]: Without dead ends: 23 [2021-11-20 23:36:48,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:36:48,693 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:48,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 12 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:36:48,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-20 23:36:48,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-20 23:36:48,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.6) internal successors, (24), 22 states have internal predecessors, (24), 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) [2021-11-20 23:36:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-11-20 23:36:48,698 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 5 [2021-11-20 23:36:48,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:48,699 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-11-20 23:36:48,699 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) [2021-11-20 23:36:48,699 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-11-20 23:36:48,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 23:36:48,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:48,700 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 23:36:48,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:48,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:36:48,911 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-11-20 23:36:48,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:48,912 INFO L85 PathProgramCache]: Analyzing trace with hash 28699852, now seen corresponding path program 1 times [2021-11-20 23:36:48,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:36:48,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884467681] [2021-11-20 23:36:48,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:48,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:36:48,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:36:48,920 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:36:48,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 23:36:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:48,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:36:48,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:48,997 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:36:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:49,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:49,153 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:36:49,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884467681] [2021-11-20 23:36:49,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884467681] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:49,154 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:49,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-20 23:36:49,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092132707] [2021-11-20 23:36:49,155 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:49,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:36:49,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:36:49,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:36:49,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:36:49,156 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:36:49,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:49,234 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-11-20 23:36:49,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:36:49,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-20 23:36:49,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:49,237 INFO L225 Difference]: With dead ends: 21 [2021-11-20 23:36:49,237 INFO L226 Difference]: Without dead ends: 21 [2021-11-20 23:36:49,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:36:49,239 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:49,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 13 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:36:49,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-20 23:36:49,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-20 23:36:49,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 20 states have internal predecessors, (22), 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) [2021-11-20 23:36:49,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-11-20 23:36:49,243 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 5 [2021-11-20 23:36:49,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:49,244 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-11-20 23:36:49,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:36:49,244 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-11-20 23:36:49,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 23:36:49,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:49,245 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:49,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:49,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:36:49,449 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-11-20 23:36:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:49,449 INFO L85 PathProgramCache]: Analyzing trace with hash -653129230, now seen corresponding path program 1 times [2021-11-20 23:36:49,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:36:49,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591424005] [2021-11-20 23:36:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:49,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:36:49,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:36:49,452 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:36:49,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 23:36:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:49,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:36:49,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:49,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:49,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:49,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:49,567 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:36:49,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591424005] [2021-11-20 23:36:49,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591424005] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:49,568 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:49,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 23:36:49,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368920639] [2021-11-20 23:36:49,569 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:49,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:36:49,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:36:49,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:36:49,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:36:49,570 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.5) 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) [2021-11-20 23:36:49,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:49,675 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-11-20 23:36:49,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:36:49,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) 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 [2021-11-20 23:36:49,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:49,677 INFO L225 Difference]: With dead ends: 36 [2021-11-20 23:36:49,677 INFO L226 Difference]: Without dead ends: 36 [2021-11-20 23:36:49,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:36:49,679 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:49,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 18 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:36:49,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-20 23:36:49,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2021-11-20 23:36:49,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.4375) internal successors, (23), 21 states have internal predecessors, (23), 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) [2021-11-20 23:36:49,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-20 23:36:49,683 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2021-11-20 23:36:49,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:49,687 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-20 23:36:49,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) 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) [2021-11-20 23:36:49,688 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-20 23:36:49,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 23:36:49,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:49,691 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:49,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:49,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:36:49,916 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-11-20 23:36:49,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:49,917 INFO L85 PathProgramCache]: Analyzing trace with hash -653129186, now seen corresponding path program 1 times [2021-11-20 23:36:49,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:36:49,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244285477] [2021-11-20 23:36:49,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:49,918 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:36:49,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:36:49,919 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:36:49,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 23:36:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:49,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:36:49,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:49,979 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:36:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:50,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:50,088 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:36:50,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244285477] [2021-11-20 23:36:50,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244285477] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:50,088 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:50,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 23:36:50,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073532962] [2021-11-20 23:36:50,092 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:50,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:36:50,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:36:50,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:36:50,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:36:50,094 INFO L87 Difference]: Start difference. First operand 22 states and 23 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) [2021-11-20 23:36:50,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:50,199 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-11-20 23:36:50,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:36:50,204 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 [2021-11-20 23:36:50,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:50,205 INFO L225 Difference]: With dead ends: 27 [2021-11-20 23:36:50,205 INFO L226 Difference]: Without dead ends: 27 [2021-11-20 23:36:50,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:36:50,207 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:50,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 9 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:36:50,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-20 23:36:50,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-11-20 23:36:50,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 21 states have internal predecessors, (24), 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) [2021-11-20 23:36:50,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-20 23:36:50,211 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 10 [2021-11-20 23:36:50,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:50,211 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-20 23:36:50,217 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) [2021-11-20 23:36:50,217 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-20 23:36:50,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 23:36:50,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:50,218 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:50,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:50,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:36:50,419 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-11-20 23:36:50,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:50,420 INFO L85 PathProgramCache]: Analyzing trace with hash -653129185, now seen corresponding path program 1 times [2021-11-20 23:36:50,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:36:50,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1761921946] [2021-11-20 23:36:50,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:50,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:36:50,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:36:50,422 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:36:50,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 23:36:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:50,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:36:50,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:50,508 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:36:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:50,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:50,798 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:36:50,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1761921946] [2021-11-20 23:36:50,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1761921946] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:50,798 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:50,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-20 23:36:50,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148263251] [2021-11-20 23:36:50,799 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:50,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:36:50,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:36:50,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:36:50,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:36:50,800 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-11-20 23:36:50,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:50,981 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-11-20 23:36:50,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:36:50,982 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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 [2021-11-20 23:36:50,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:50,982 INFO L225 Difference]: With dead ends: 31 [2021-11-20 23:36:50,982 INFO L226 Difference]: Without dead ends: 31 [2021-11-20 23:36:50,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:36:50,984 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:50,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 15 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:36:50,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-20 23:36:50,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2021-11-20 23:36:50,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.368421052631579) internal successors, (26), 23 states have internal predecessors, (26), 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) [2021-11-20 23:36:50,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-11-20 23:36:50,988 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2021-11-20 23:36:50,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:50,988 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-11-20 23:36:50,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-11-20 23:36:50,989 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-11-20 23:36:50,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 23:36:50,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:50,989 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:51,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:51,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:36:51,190 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-11-20 23:36:51,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:51,190 INFO L85 PathProgramCache]: Analyzing trace with hash -591922145, now seen corresponding path program 1 times [2021-11-20 23:36:51,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:36:51,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571810660] [2021-11-20 23:36:51,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:51,191 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:36:51,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:36:51,195 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:36:51,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 23:36:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:51,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:36:51,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:51,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:36:51,310 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 23:36:51,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 23:36:51,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 23:36:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:51,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:51,421 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:36:51,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571810660] [2021-11-20 23:36:51,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571810660] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:51,422 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:51,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 23:36:51,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645361892] [2021-11-20 23:36:51,422 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:51,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:36:51,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:36:51,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:36:51,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:36:51,424 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-11-20 23:36:51,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:51,600 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-20 23:36:51,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:36:51,601 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 12 [2021-11-20 23:36:51,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:51,602 INFO L225 Difference]: With dead ends: 28 [2021-11-20 23:36:51,602 INFO L226 Difference]: Without dead ends: 28 [2021-11-20 23:36:51,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:36:51,603 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 22 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:51,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 36 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:36:51,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-20 23:36:51,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-11-20 23:36:51,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 23 states have internal predecessors, (25), 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) [2021-11-20 23:36:51,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-20 23:36:51,611 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 12 [2021-11-20 23:36:51,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:51,611 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-20 23:36:51,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-11-20 23:36:51,612 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-20 23:36:51,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 23:36:51,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:51,613 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:51,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:51,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:36:51,814 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-11-20 23:36:51,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:51,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1187913323, now seen corresponding path program 1 times [2021-11-20 23:36:51,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:36:51,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339556252] [2021-11-20 23:36:51,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:51,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:36:51,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:36:51,817 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:36:51,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 23:36:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 23:36:51,886 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 23:36:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 23:36:51,939 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-20 23:36:51,940 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 23:36:51,941 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK (9 of 10 remaining) [2021-11-20 23:36:51,942 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (8 of 10 remaining) [2021-11-20 23:36:51,943 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (7 of 10 remaining) [2021-11-20 23:36:51,943 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (6 of 10 remaining) [2021-11-20 23:36:51,943 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (5 of 10 remaining) [2021-11-20 23:36:51,943 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (4 of 10 remaining) [2021-11-20 23:36:51,943 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (3 of 10 remaining) [2021-11-20 23:36:51,943 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2021-11-20 23:36:51,944 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (1 of 10 remaining) [2021-11-20 23:36:51,944 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (0 of 10 remaining) [2021-11-20 23:36:51,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:52,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:36:52,147 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:52,149 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 23:36:52,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 11:36:52 BoogieIcfgContainer [2021-11-20 23:36:52,173 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 23:36:52,173 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 23:36:52,173 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 23:36:52,174 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 23:36:52,174 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:36:47" (3/4) ... [2021-11-20 23:36:52,177 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-20 23:36:52,177 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 23:36:52,178 INFO L158 Benchmark]: Toolchain (without parser) took 6054.92ms. Allocated memory was 50.3MB in the beginning and 86.0MB in the end (delta: 35.7MB). Free memory was 25.9MB in the beginning and 39.1MB in the end (delta: -13.2MB). Peak memory consumption was 24.0MB. Max. memory is 16.1GB. [2021-11-20 23:36:52,178 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 50.3MB. Free memory is still 31.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:36:52,179 INFO L158 Benchmark]: CACSL2BoogieTranslator took 537.69ms. Allocated memory was 50.3MB in the beginning and 67.1MB in the end (delta: 16.8MB). Free memory was 25.7MB in the beginning and 47.0MB in the end (delta: -21.3MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2021-11-20 23:36:52,179 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.63ms. Allocated memory is still 67.1MB. Free memory was 47.0MB in the beginning and 45.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:36:52,179 INFO L158 Benchmark]: Boogie Preprocessor took 65.40ms. Allocated memory is still 67.1MB. Free memory was 45.2MB in the beginning and 43.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:36:52,180 INFO L158 Benchmark]: RCFGBuilder took 464.35ms. Allocated memory is still 67.1MB. Free memory was 43.5MB in the beginning and 32.3MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-20 23:36:52,180 INFO L158 Benchmark]: TraceAbstraction took 4909.35ms. Allocated memory was 67.1MB in the beginning and 86.0MB in the end (delta: 18.9MB). Free memory was 32.1MB in the beginning and 39.1MB in the end (delta: -7.1MB). Peak memory consumption was 11.9MB. Max. memory is 16.1GB. [2021-11-20 23:36:52,181 INFO L158 Benchmark]: Witness Printer took 4.03ms. Allocated memory is still 86.0MB. Free memory is still 39.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:36:52,183 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 50.3MB. Free memory is still 31.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 537.69ms. Allocated memory was 50.3MB in the beginning and 67.1MB in the end (delta: 16.8MB). Free memory was 25.7MB in the beginning and 47.0MB in the end (delta: -21.3MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 67.63ms. Allocated memory is still 67.1MB. Free memory was 47.0MB in the beginning and 45.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 65.40ms. Allocated memory is still 67.1MB. Free memory was 45.2MB in the beginning and 43.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 464.35ms. Allocated memory is still 67.1MB. Free memory was 43.5MB in the beginning and 32.3MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 4909.35ms. Allocated memory was 67.1MB in the beginning and 86.0MB in the end (delta: 18.9MB). Free memory was 32.1MB in the beginning and 39.1MB in the end (delta: -7.1MB). Peak memory consumption was 11.9MB. Max. memory is 16.1GB. * Witness Printer took 4.03ms. Allocated memory is still 86.0MB. Free memory is still 39.1MB. There was no memory consumed. Max. memory is 16.1GB. * 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 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List t; [L533] List p = 0; VAL [p={0:0}] [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) VAL [p={0:0}, t={6:0}] [L537] t->h = 1 VAL [p={0:0}, t={6:0}] [L538] t->n = p VAL [p={0:0}, t={6:0}] [L539] p = t VAL [p={6:0}, t={6:0}] [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 VAL [p={6:0}, t={6:0}] [L542] EXPR p->h VAL [p={6:0}, p->h=1, t={6:0}] [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n VAL [p={6:0}, p->n={0:0}, t={6:0}] [L545] p = p->n [L541] COND FALSE !(p!=0) VAL [p={0:0}, t={6:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: 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: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed 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. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 27 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 4.8s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 210 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 210 mSDsluCounter, 177 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 58 mSDsCounter, 14 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 181 IncrementalHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14 mSolverCounterUnsat, 119 mSDtfsCounter, 181 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 114 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=1, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 44 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 77 NumberOfCodeBlocks, 77 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 550 SizeOfPredicates, 9 NumberOfNonLiveVariables, 268 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 8/8 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 could not prove your program: unable to determine feasibility of some traces [2021-11-20 23:36:52,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1372c88-0a7e-4f3d-b244-a98220ff8e50/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample