./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/25_stack.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d2813-fd2f-4d3c-9c3b-0e7c9f5ff6fc/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d2813-fd2f-4d3c-9c3b-0e7c9f5ff6fc/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d2813-fd2f-4d3c-9c3b-0e7c9f5ff6fc/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d2813-fd2f-4d3c-9c3b-0e7c9f5ff6fc/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/25_stack.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d2813-fd2f-4d3c-9c3b-0e7c9f5ff6fc/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d2813-fd2f-4d3c-9c3b-0e7c9f5ff6fc/bin/utaipan-g80aRyZoba --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 4272d82e4e32dc4af1661c2cd99f5af7e9487f266698e80f4586c30581d39fa9 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 02:39:06,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:39:06,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:39:06,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:39:06,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:39:06,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:39:06,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:39:06,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:39:06,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:39:06,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:39:06,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:39:06,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:39:06,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:39:06,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:39:06,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:39:06,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:39:06,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:39:06,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:39:06,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:39:06,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:39:06,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:39:06,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:39:06,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:39:06,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:39:06,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:39:06,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:39:06,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:39:06,966 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:39:06,967 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:39:06,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:39:06,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:39:06,972 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:39:06,974 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:39:06,975 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:39:06,978 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:39:06,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:39:06,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:39:06,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:39:06,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:39:06,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:39:06,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:39:06,984 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d2813-fd2f-4d3c-9c3b-0e7c9f5ff6fc/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 02:39:07,032 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:39:07,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:39:07,034 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:39:07,034 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:39:07,035 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:39:07,035 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:39:07,036 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:39:07,036 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:39:07,036 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:39:07,037 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:39:07,038 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:39:07,038 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:39:07,039 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:39:07,039 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:39:07,039 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:39:07,039 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:39:07,040 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:39:07,040 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:39:07,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 02:39:07,041 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 02:39:07,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:39:07,042 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:39:07,042 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 02:39:07,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:39:07,043 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:39:07,043 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:39:07,043 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 02:39:07,043 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 02:39:07,044 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 02:39:07,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:39:07,044 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 02:39:07,045 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:39:07,045 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:39:07,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:39:07,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:39:07,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:39:07,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:39:07,046 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:39:07,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:39:07,047 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:39:07,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:39:07,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:39:07,048 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_881d2813-fd2f-4d3c-9c3b-0e7c9f5ff6fc/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d2813-fd2f-4d3c-9c3b-0e7c9f5ff6fc/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4272d82e4e32dc4af1661c2cd99f5af7e9487f266698e80f4586c30581d39fa9 [2022-11-22 02:39:07,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:39:07,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:39:07,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:39:07,479 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:39:07,480 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:39:07,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d2813-fd2f-4d3c-9c3b-0e7c9f5ff6fc/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/pthread-ext/25_stack.i [2022-11-22 02:39:10,716 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:39:11,089 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:39:11,092 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d2813-fd2f-4d3c-9c3b-0e7c9f5ff6fc/sv-benchmarks/c/pthread-ext/25_stack.i [2022-11-22 02:39:11,109 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d2813-fd2f-4d3c-9c3b-0e7c9f5ff6fc/bin/utaipan-g80aRyZoba/data/f77b0cb26/c9385304a7ba457a89b4cb408067b0b8/FLAG21bd73b11 [2022-11-22 02:39:11,127 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d2813-fd2f-4d3c-9c3b-0e7c9f5ff6fc/bin/utaipan-g80aRyZoba/data/f77b0cb26/c9385304a7ba457a89b4cb408067b0b8 [2022-11-22 02:39:11,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:39:11,134 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:39:11,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:39:11,137 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:39:11,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:39:11,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:39:11" (1/1) ... [2022-11-22 02:39:11,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e44037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:11, skipping insertion in model container [2022-11-22 02:39:11,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:39:11" (1/1) ... [2022-11-22 02:39:11,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:39:11,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:39:11,593 WARN L237 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_881d2813-fd2f-4d3c-9c3b-0e7c9f5ff6fc/sv-benchmarks/c/pthread-ext/25_stack.i[31028,31041] [2022-11-22 02:39:11,606 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:39:11,621 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:39:11,689 WARN L237 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_881d2813-fd2f-4d3c-9c3b-0e7c9f5ff6fc/sv-benchmarks/c/pthread-ext/25_stack.i[31028,31041] [2022-11-22 02:39:11,696 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:39:11,758 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:39:11,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:11 WrapperNode [2022-11-22 02:39:11,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:39:11,761 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:39:11,761 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:39:11,762 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:39:11,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:11" (1/1) ... [2022-11-22 02:39:11,814 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:11" (1/1) ... [2022-11-22 02:39:11,863 INFO L138 Inliner]: procedures = 177, calls = 34, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 174 [2022-11-22 02:39:11,864 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:39:11,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:39:11,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:39:11,866 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:39:11,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:11" (1/1) ... [2022-11-22 02:39:11,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:11" (1/1) ... [2022-11-22 02:39:11,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:11" (1/1) ... [2022-11-22 02:39:11,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:11" (1/1) ... [2022-11-22 02:39:11,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:11" (1/1) ... [2022-11-22 02:39:11,895 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:11" (1/1) ... [2022-11-22 02:39:11,897 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:11" (1/1) ... [2022-11-22 02:39:11,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:11" (1/1) ... [2022-11-22 02:39:11,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:39:11,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:39:11,904 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:39:11,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:39:11,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:11" (1/1) ... [2022-11-22 02:39:11,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:39:11,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d2813-fd2f-4d3c-9c3b-0e7c9f5ff6fc/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:39:11,962 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d2813-fd2f-4d3c-9c3b-0e7c9f5ff6fc/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:39:11,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d2813-fd2f-4d3c-9c3b-0e7c9f5ff6fc/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:39:12,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 02:39:12,025 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-22 02:39:12,026 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-22 02:39:12,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 02:39:12,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:39:12,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 02:39:12,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:39:12,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:39:12,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:39:12,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:39:12,029 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-22 02:39:12,197 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:39:12,212 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:39:12,900 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:39:13,277 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:39:13,277 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-22 02:39:13,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:39:13 BoogieIcfgContainer [2022-11-22 02:39:13,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:39:13,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:39:13,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:39:13,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:39:13,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:39:11" (1/3) ... [2022-11-22 02:39:13,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540a6264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:39:13, skipping insertion in model container [2022-11-22 02:39:13,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:11" (2/3) ... [2022-11-22 02:39:13,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540a6264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:39:13, skipping insertion in model container [2022-11-22 02:39:13,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:39:13" (3/3) ... [2022-11-22 02:39:13,297 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack.i [2022-11-22 02:39:13,321 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:39:13,321 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-11-22 02:39:13,322 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-22 02:39:13,519 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-22 02:39:13,574 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-22 02:39:13,605 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 144 transitions, 293 flow [2022-11-22 02:39:13,616 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 144 transitions, 293 flow [2022-11-22 02:39:13,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 144 transitions, 293 flow [2022-11-22 02:39:13,736 INFO L130 PetriNetUnfolder]: 8/160 cut-off events. [2022-11-22 02:39:13,736 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-22 02:39:13,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 160 events. 8/160 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 287 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 118. Up to 4 conditions per place. [2022-11-22 02:39:13,751 INFO L119 LiptonReduction]: Number of co-enabled transitions 3800 [2022-11-22 02:39:26,470 INFO L134 LiptonReduction]: Checked pairs total: 4752 [2022-11-22 02:39:26,470 INFO L136 LiptonReduction]: Total number of compositions: 199 [2022-11-22 02:39:26,489 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 52 transitions, 109 flow [2022-11-22 02:39:26,549 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 325 states, 163 states have (on average 3.8466257668711656) internal successors, (627), 324 states have internal predecessors, (627), 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) [2022-11-22 02:39:26,574 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:39:26,582 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@41a2d826, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:39:26,583 INFO L358 AbstractCegarLoop]: Starting to check reachability of 66 error locations. [2022-11-22 02:39:26,587 INFO L276 IsEmpty]: Start isEmpty. Operand has 325 states, 163 states have (on average 3.8466257668711656) internal successors, (627), 324 states have internal predecessors, (627), 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) [2022-11-22 02:39:26,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 02:39:26,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:39:26,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 02:39:26,595 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-11-22 02:39:26,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:39:26,602 INFO L85 PathProgramCache]: Analyzing trace with hash 31667, now seen corresponding path program 1 times [2022-11-22 02:39:26,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:39:26,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312769848] [2022-11-22 02:39:26,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:39:26,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:39:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:39:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:39:26,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:39:26,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312769848] [2022-11-22 02:39:26,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312769848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:39:26,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:39:26,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:39:26,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590341753] [2022-11-22 02:39:26,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:39:26,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:39:26,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:39:27,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:39:27,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:39:27,017 INFO L87 Difference]: Start difference. First operand has 325 states, 163 states have (on average 3.8466257668711656) internal successors, (627), 324 states have internal predecessors, (627), 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 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-22 02:39:27,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:39:27,138 INFO L93 Difference]: Finished difference Result 94 states and 176 transitions. [2022-11-22 02:39:27,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:39:27,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-22 02:39:27,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:39:27,153 INFO L225 Difference]: With dead ends: 94 [2022-11-22 02:39:27,153 INFO L226 Difference]: Without dead ends: 94 [2022-11-22 02:39:27,155 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:39:27,158 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:39:27,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 1 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:39:27,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-22 02:39:27,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-11-22 02:39:27,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 73 states have (on average 2.410958904109589) internal successors, (176), 93 states have internal predecessors, (176), 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) [2022-11-22 02:39:27,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 176 transitions. [2022-11-22 02:39:27,216 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 176 transitions. Word has length 2 [2022-11-22 02:39:27,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:39:27,218 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 176 transitions. [2022-11-22 02:39:27,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-22 02:39:27,222 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 176 transitions. [2022-11-22 02:39:27,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 02:39:27,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:39:27,223 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 02:39:27,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:39:27,224 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-11-22 02:39:27,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:39:27,225 INFO L85 PathProgramCache]: Analyzing trace with hash 31668, now seen corresponding path program 1 times [2022-11-22 02:39:27,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:39:27,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294659779] [2022-11-22 02:39:27,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:39:27,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:39:27,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:39:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:39:27,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:39:27,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294659779] [2022-11-22 02:39:27,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294659779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:39:27,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:39:27,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:39:27,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105895715] [2022-11-22 02:39:27,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:39:27,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:39:27,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:39:27,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:39:27,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:39:27,385 INFO L87 Difference]: Start difference. First operand 94 states and 176 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-22 02:39:27,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:39:27,460 INFO L93 Difference]: Finished difference Result 75 states and 137 transitions. [2022-11-22 02:39:27,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:39:27,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-22 02:39:27,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:39:27,463 INFO L225 Difference]: With dead ends: 75 [2022-11-22 02:39:27,464 INFO L226 Difference]: Without dead ends: 75 [2022-11-22 02:39:27,465 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:39:27,466 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:39:27,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:39:27,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-22 02:39:27,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-22 02:39:27,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 74 states have internal predecessors, (137), 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) [2022-11-22 02:39:27,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 137 transitions. [2022-11-22 02:39:27,485 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 137 transitions. Word has length 2 [2022-11-22 02:39:27,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:39:27,485 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 137 transitions. [2022-11-22 02:39:27,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-22 02:39:27,486 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 137 transitions. [2022-11-22 02:39:27,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 02:39:27,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:39:27,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 02:39:27,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:39:27,491 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-11-22 02:39:27,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:39:27,491 INFO L85 PathProgramCache]: Analyzing trace with hash 30455788, now seen corresponding path program 1 times [2022-11-22 02:39:27,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:39:27,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694286260] [2022-11-22 02:39:27,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:39:27,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:39:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:39:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:39:27,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:39:27,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694286260] [2022-11-22 02:39:27,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694286260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:39:27,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:39:27,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:39:27,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404093169] [2022-11-22 02:39:27,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:39:27,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:39:27,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:39:27,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:39:27,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:39:27,769 INFO L87 Difference]: Start difference. First operand 75 states and 137 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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) [2022-11-22 02:39:27,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:39:27,875 INFO L93 Difference]: Finished difference Result 71 states and 130 transitions. [2022-11-22 02:39:27,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:39:27,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 [2022-11-22 02:39:27,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:39:27,883 INFO L225 Difference]: With dead ends: 71 [2022-11-22 02:39:27,883 INFO L226 Difference]: Without dead ends: 71 [2022-11-22 02:39:27,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:39:27,885 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:39:27,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 1 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:39:27,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-22 02:39:27,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-11-22 02:39:27,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 2.096774193548387) internal successors, (130), 70 states have internal predecessors, (130), 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) [2022-11-22 02:39:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 130 transitions. [2022-11-22 02:39:27,902 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 130 transitions. Word has length 4 [2022-11-22 02:39:27,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:39:27,903 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 130 transitions. [2022-11-22 02:39:27,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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) [2022-11-22 02:39:27,909 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 130 transitions. [2022-11-22 02:39:27,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 02:39:27,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:39:27,910 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 02:39:27,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:39:27,911 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-11-22 02:39:27,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:39:27,912 INFO L85 PathProgramCache]: Analyzing trace with hash 30455789, now seen corresponding path program 1 times [2022-11-22 02:39:27,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:39:27,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253621968] [2022-11-22 02:39:27,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:39:27,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:39:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:39:28,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:39:28,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:39:28,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253621968] [2022-11-22 02:39:28,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253621968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:39:28,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:39:28,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:39:28,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632434360] [2022-11-22 02:39:28,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:39:28,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:39:28,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:39:28,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:39:28,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:39:28,151 INFO L87 Difference]: Start difference. First operand 71 states and 130 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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) [2022-11-22 02:39:28,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:39:28,240 INFO L93 Difference]: Finished difference Result 67 states and 123 transitions. [2022-11-22 02:39:28,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:39:28,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 [2022-11-22 02:39:28,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:39:28,244 INFO L225 Difference]: With dead ends: 67 [2022-11-22 02:39:28,244 INFO L226 Difference]: Without dead ends: 67 [2022-11-22 02:39:28,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:39:28,249 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:39:28,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:39:28,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-22 02:39:28,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-11-22 02:39:28,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 66 states have internal predecessors, (123), 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) [2022-11-22 02:39:28,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 123 transitions. [2022-11-22 02:39:28,265 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 123 transitions. Word has length 4 [2022-11-22 02:39:28,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:39:28,265 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 123 transitions. [2022-11-22 02:39:28,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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) [2022-11-22 02:39:28,266 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 123 transitions. [2022-11-22 02:39:28,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 02:39:28,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:39:28,266 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-22 02:39:28,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:39:28,267 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-11-22 02:39:28,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:39:28,268 INFO L85 PathProgramCache]: Analyzing trace with hash -796727777, now seen corresponding path program 1 times [2022-11-22 02:39:28,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:39:28,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001623652] [2022-11-22 02:39:28,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:39:28,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:39:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 02:39:28,303 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-22 02:39:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 02:39:28,347 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-22 02:39:28,348 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-22 02:39:28,349 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (65 of 66 remaining) [2022-11-22 02:39:28,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 66 remaining) [2022-11-22 02:39:28,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 66 remaining) [2022-11-22 02:39:28,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 66 remaining) [2022-11-22 02:39:28,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 66 remaining) [2022-11-22 02:39:28,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 66 remaining) [2022-11-22 02:39:28,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 66 remaining) [2022-11-22 02:39:28,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 66 remaining) [2022-11-22 02:39:28,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 66 remaining) [2022-11-22 02:39:28,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 66 remaining) [2022-11-22 02:39:28,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 66 remaining) [2022-11-22 02:39:28,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 66 remaining) [2022-11-22 02:39:28,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 66 remaining) [2022-11-22 02:39:28,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 66 remaining) [2022-11-22 02:39:28,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 66 remaining) [2022-11-22 02:39:28,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 66 remaining) [2022-11-22 02:39:28,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 66 remaining) [2022-11-22 02:39:28,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 66 remaining) [2022-11-22 02:39:28,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 66 remaining) [2022-11-22 02:39:28,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 66 remaining) [2022-11-22 02:39:28,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 66 remaining) [2022-11-22 02:39:28,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (44 of 66 remaining) [2022-11-22 02:39:28,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 66 remaining) [2022-11-22 02:39:28,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 66 remaining) [2022-11-22 02:39:28,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 66 remaining) [2022-11-22 02:39:28,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 66 remaining) [2022-11-22 02:39:28,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (39 of 66 remaining) [2022-11-22 02:39:28,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (38 of 66 remaining) [2022-11-22 02:39:28,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 66 remaining) [2022-11-22 02:39:28,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 66 remaining) [2022-11-22 02:39:28,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 66 remaining) [2022-11-22 02:39:28,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 66 remaining) [2022-11-22 02:39:28,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (33 of 66 remaining) [2022-11-22 02:39:28,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 66 remaining) [2022-11-22 02:39:28,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 66 remaining) [2022-11-22 02:39:28,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 66 remaining) [2022-11-22 02:39:28,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 66 remaining) [2022-11-22 02:39:28,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 66 remaining) [2022-11-22 02:39:28,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 66 remaining) [2022-11-22 02:39:28,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 66 remaining) [2022-11-22 02:39:28,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 66 remaining) [2022-11-22 02:39:28,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 66 remaining) [2022-11-22 02:39:28,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 66 remaining) [2022-11-22 02:39:28,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 66 remaining) [2022-11-22 02:39:28,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 66 remaining) [2022-11-22 02:39:28,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 66 remaining) [2022-11-22 02:39:28,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 66 remaining) [2022-11-22 02:39:28,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 66 remaining) [2022-11-22 02:39:28,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 66 remaining) [2022-11-22 02:39:28,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 66 remaining) [2022-11-22 02:39:28,374 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 66 remaining) [2022-11-22 02:39:28,374 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 66 remaining) [2022-11-22 02:39:28,375 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 66 remaining) [2022-11-22 02:39:28,375 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 66 remaining) [2022-11-22 02:39:28,375 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 66 remaining) [2022-11-22 02:39:28,375 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (10 of 66 remaining) [2022-11-22 02:39:28,375 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 66 remaining) [2022-11-22 02:39:28,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 66 remaining) [2022-11-22 02:39:28,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 66 remaining) [2022-11-22 02:39:28,377 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 66 remaining) [2022-11-22 02:39:28,377 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (5 of 66 remaining) [2022-11-22 02:39:28,377 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (4 of 66 remaining) [2022-11-22 02:39:28,377 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 66 remaining) [2022-11-22 02:39:28,378 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 66 remaining) [2022-11-22 02:39:28,378 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 66 remaining) [2022-11-22 02:39:28,379 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 66 remaining) [2022-11-22 02:39:28,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:39:28,381 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-22 02:39:28,384 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-22 02:39:28,385 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-22 02:39:28,464 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-22 02:39:28,474 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-22 02:39:28,474 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 245 transitions, 502 flow [2022-11-22 02:39:28,475 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 245 transitions, 502 flow [2022-11-22 02:39:28,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 245 transitions, 502 flow [2022-11-22 02:39:28,584 INFO L130 PetriNetUnfolder]: 15/279 cut-off events. [2022-11-22 02:39:28,585 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-22 02:39:28,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 279 events. 15/279 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 797 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 218. Up to 6 conditions per place. [2022-11-22 02:39:28,607 INFO L119 LiptonReduction]: Number of co-enabled transitions 27800 [2022-11-22 02:39:45,042 INFO L134 LiptonReduction]: Checked pairs total: 72450 [2022-11-22 02:39:45,043 INFO L136 LiptonReduction]: Total number of compositions: 308 [2022-11-22 02:39:45,046 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 115 places, 120 transitions, 252 flow [2022-11-22 02:39:45,865 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 23354 states, 18105 states have (on average 3.9086440209886772) internal successors, (70766), 23353 states have internal predecessors, (70766), 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) [2022-11-22 02:39:45,876 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:39:45,886 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@41a2d826, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:39:45,886 INFO L358 AbstractCegarLoop]: Starting to check reachability of 97 error locations. [2022-11-22 02:39:46,048 INFO L276 IsEmpty]: Start isEmpty. Operand has 23354 states, 18105 states have (on average 3.9086440209886772) internal successors, (70766), 23353 states have internal predecessors, (70766), 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) [2022-11-22 02:39:46,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 02:39:46,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:39:46,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 02:39:46,049 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-11-22 02:39:46,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:39:46,051 INFO L85 PathProgramCache]: Analyzing trace with hash 52783, now seen corresponding path program 1 times [2022-11-22 02:39:46,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:39:46,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595260629] [2022-11-22 02:39:46,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:39:46,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:39:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:39:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:39:46,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:39:46,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595260629] [2022-11-22 02:39:46,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595260629] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:39:46,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:39:46,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:39:46,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165449520] [2022-11-22 02:39:46,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:39:46,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:39:46,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:39:46,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:39:46,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:39:46,165 INFO L87 Difference]: Start difference. First operand has 23354 states, 18105 states have (on average 3.9086440209886772) internal successors, (70766), 23353 states have internal predecessors, (70766), 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 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-22 02:39:46,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:39:46,492 INFO L93 Difference]: Finished difference Result 8176 states and 24337 transitions. [2022-11-22 02:39:46,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:39:46,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-22 02:39:46,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:39:46,580 INFO L225 Difference]: With dead ends: 8176 [2022-11-22 02:39:46,581 INFO L226 Difference]: Without dead ends: 8176 [2022-11-22 02:39:46,581 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:39:46,582 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:39:46,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 15 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:39:46,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2022-11-22 02:39:47,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 8176. [2022-11-22 02:39:47,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8176 states, 7509 states have (on average 3.2410440804368092) internal successors, (24337), 8175 states have internal predecessors, (24337), 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) [2022-11-22 02:39:47,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8176 states to 8176 states and 24337 transitions. [2022-11-22 02:39:47,119 INFO L78 Accepts]: Start accepts. Automaton has 8176 states and 24337 transitions. Word has length 2 [2022-11-22 02:39:47,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:39:47,120 INFO L495 AbstractCegarLoop]: Abstraction has 8176 states and 24337 transitions. [2022-11-22 02:39:47,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-22 02:39:47,120 INFO L276 IsEmpty]: Start isEmpty. Operand 8176 states and 24337 transitions. [2022-11-22 02:39:47,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 02:39:47,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:39:47,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 02:39:47,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:39:47,123 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-11-22 02:39:47,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:39:47,123 INFO L85 PathProgramCache]: Analyzing trace with hash 52785, now seen corresponding path program 1 times [2022-11-22 02:39:47,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:39:47,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788484509] [2022-11-22 02:39:47,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:39:47,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:39:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:39:47,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:39:47,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:39:47,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788484509] [2022-11-22 02:39:47,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788484509] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:39:47,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:39:47,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:39:47,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314368380] [2022-11-22 02:39:47,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:39:47,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:39:47,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:39:47,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:39:47,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:39:47,199 INFO L87 Difference]: Start difference. First operand 8176 states and 24337 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-22 02:39:47,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:39:47,408 INFO L93 Difference]: Finished difference Result 6807 states and 20046 transitions. [2022-11-22 02:39:47,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:39:47,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-22 02:39:47,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:39:47,483 INFO L225 Difference]: With dead ends: 6807 [2022-11-22 02:39:47,484 INFO L226 Difference]: Without dead ends: 6807 [2022-11-22 02:39:47,485 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:39:47,486 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 85 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:39:47,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 15 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:39:47,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6807 states. [2022-11-22 02:39:47,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6807 to 6807. [2022-11-22 02:39:47,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6807 states, 6483 states have (on average 3.092086996760759) internal successors, (20046), 6806 states have internal predecessors, (20046), 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) [2022-11-22 02:39:47,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6807 states to 6807 states and 20046 transitions. [2022-11-22 02:39:47,814 INFO L78 Accepts]: Start accepts. Automaton has 6807 states and 20046 transitions. Word has length 2 [2022-11-22 02:39:47,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:39:47,815 INFO L495 AbstractCegarLoop]: Abstraction has 6807 states and 20046 transitions. [2022-11-22 02:39:47,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-22 02:39:47,815 INFO L276 IsEmpty]: Start isEmpty. Operand 6807 states and 20046 transitions. [2022-11-22 02:39:47,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 02:39:47,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:39:47,817 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 02:39:47,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 02:39:47,817 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-11-22 02:39:47,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:39:47,818 INFO L85 PathProgramCache]: Analyzing trace with hash 50767644, now seen corresponding path program 1 times [2022-11-22 02:39:47,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:39:47,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903753255] [2022-11-22 02:39:47,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:39:47,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:39:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:39:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:39:48,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:39:48,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903753255] [2022-11-22 02:39:48,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903753255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:39:48,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:39:48,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:39:48,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174669461] [2022-11-22 02:39:48,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:39:48,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:39:48,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:39:48,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:39:48,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:39:48,065 INFO L87 Difference]: Start difference. First operand 6807 states and 20046 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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) [2022-11-22 02:39:48,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:39:48,297 INFO L93 Difference]: Finished difference Result 6089 states and 17982 transitions. [2022-11-22 02:39:48,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:39:48,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 [2022-11-22 02:39:48,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:39:48,337 INFO L225 Difference]: With dead ends: 6089 [2022-11-22 02:39:48,337 INFO L226 Difference]: Without dead ends: 6089 [2022-11-22 02:39:48,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:39:48,339 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 81 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:39:48,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 15 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:39:48,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6089 states. [2022-11-22 02:39:48,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6089 to 6089. [2022-11-22 02:39:48,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6089 states, 5833 states have (on average 3.082804731698954) internal successors, (17982), 6088 states have internal predecessors, (17982), 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) [2022-11-22 02:39:48,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6089 states to 6089 states and 17982 transitions. [2022-11-22 02:39:48,630 INFO L78 Accepts]: Start accepts. Automaton has 6089 states and 17982 transitions. Word has length 4 [2022-11-22 02:39:48,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:39:48,631 INFO L495 AbstractCegarLoop]: Abstraction has 6089 states and 17982 transitions. [2022-11-22 02:39:48,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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) [2022-11-22 02:39:48,632 INFO L276 IsEmpty]: Start isEmpty. Operand 6089 states and 17982 transitions. [2022-11-22 02:39:48,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 02:39:48,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:39:48,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 02:39:48,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 02:39:48,633 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-11-22 02:39:48,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:39:48,634 INFO L85 PathProgramCache]: Analyzing trace with hash 50767643, now seen corresponding path program 1 times [2022-11-22 02:39:48,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:39:48,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434910060] [2022-11-22 02:39:48,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:39:48,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:39:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:39:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:39:48,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:39:48,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434910060] [2022-11-22 02:39:48,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434910060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:39:48,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:39:48,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:39:48,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214080239] [2022-11-22 02:39:48,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:39:48,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:39:48,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:39:48,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:39:48,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:39:48,764 INFO L87 Difference]: Start difference. First operand 6089 states and 17982 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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) [2022-11-22 02:39:48,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:39:48,969 INFO L93 Difference]: Finished difference Result 5411 states and 16030 transitions. [2022-11-22 02:39:48,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:39:48,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 [2022-11-22 02:39:48,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:39:48,998 INFO L225 Difference]: With dead ends: 5411 [2022-11-22 02:39:48,999 INFO L226 Difference]: Without dead ends: 5411 [2022-11-22 02:39:48,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:39:49,000 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 152 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:39:49,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 15 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:39:49,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5411 states. [2022-11-22 02:39:49,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5411 to 5411. [2022-11-22 02:39:49,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5411 states, 5215 states have (on average 3.0738255033557045) internal successors, (16030), 5410 states have internal predecessors, (16030), 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) [2022-11-22 02:39:49,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5411 states to 5411 states and 16030 transitions. [2022-11-22 02:39:49,579 INFO L78 Accepts]: Start accepts. Automaton has 5411 states and 16030 transitions. Word has length 4 [2022-11-22 02:39:49,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:39:49,580 INFO L495 AbstractCegarLoop]: Abstraction has 5411 states and 16030 transitions. [2022-11-22 02:39:49,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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) [2022-11-22 02:39:49,580 INFO L276 IsEmpty]: Start isEmpty. Operand 5411 states and 16030 transitions. [2022-11-22 02:39:49,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 02:39:49,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:39:49,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:39:49,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 02:39:49,582 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-11-22 02:39:49,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:39:49,583 INFO L85 PathProgramCache]: Analyzing trace with hash 591950679, now seen corresponding path program 1 times [2022-11-22 02:39:49,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:39:49,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722419353] [2022-11-22 02:39:49,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:39:49,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:39:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:39:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:39:49,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:39:49,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722419353] [2022-11-22 02:39:49,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722419353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:39:49,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:39:49,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:39:49,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459201236] [2022-11-22 02:39:49,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:39:49,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:39:49,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:39:49,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:39:49,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:39:49,655 INFO L87 Difference]: Start difference. First operand 5411 states and 16030 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:39:49,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:39:50,000 INFO L93 Difference]: Finished difference Result 6241 states and 18385 transitions. [2022-11-22 02:39:50,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:39:50,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 02:39:50,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:39:50,041 INFO L225 Difference]: With dead ends: 6241 [2022-11-22 02:39:50,041 INFO L226 Difference]: Without dead ends: 6241 [2022-11-22 02:39:50,042 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:39:50,042 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 71 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:39:50,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 29 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:39:50,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6241 states. [2022-11-22 02:39:50,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6241 to 5681. [2022-11-22 02:39:50,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5681 states, 5471 states have (on average 3.0665326265764943) internal successors, (16777), 5680 states have internal predecessors, (16777), 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) [2022-11-22 02:39:50,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5681 states to 5681 states and 16777 transitions. [2022-11-22 02:39:50,399 INFO L78 Accepts]: Start accepts. Automaton has 5681 states and 16777 transitions. Word has length 7 [2022-11-22 02:39:50,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:39:50,399 INFO L495 AbstractCegarLoop]: Abstraction has 5681 states and 16777 transitions. [2022-11-22 02:39:50,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:39:50,400 INFO L276 IsEmpty]: Start isEmpty. Operand 5681 states and 16777 transitions. [2022-11-22 02:39:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 02:39:50,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:39:50,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:39:50,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 02:39:50,402 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-11-22 02:39:50,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:39:50,403 INFO L85 PathProgramCache]: Analyzing trace with hash -744715311, now seen corresponding path program 1 times [2022-11-22 02:39:50,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:39:50,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873205286] [2022-11-22 02:39:50,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:39:50,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:39:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:39:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:39:50,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:39:50,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873205286] [2022-11-22 02:39:50,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873205286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:39:50,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:39:50,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:39:50,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756441153] [2022-11-22 02:39:50,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:39:50,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:39:50,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:39:50,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:39:50,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:39:50,545 INFO L87 Difference]: Start difference. First operand 5681 states and 16777 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:39:50,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:39:50,687 INFO L93 Difference]: Finished difference Result 4111 states and 12247 transitions. [2022-11-22 02:39:50,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:39:50,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-22 02:39:50,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:39:50,705 INFO L225 Difference]: With dead ends: 4111 [2022-11-22 02:39:50,705 INFO L226 Difference]: Without dead ends: 4111 [2022-11-22 02:39:50,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:39:50,706 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 127 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:39:50,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 15 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:39:50,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4111 states. [2022-11-22 02:39:50,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4111 to 4111. [2022-11-22 02:39:50,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4111 states, 4021 states have (on average 3.0457597612534197) internal successors, (12247), 4110 states have internal predecessors, (12247), 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) [2022-11-22 02:39:50,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4111 states to 4111 states and 12247 transitions. [2022-11-22 02:39:50,930 INFO L78 Accepts]: Start accepts. Automaton has 4111 states and 12247 transitions. Word has length 9 [2022-11-22 02:39:50,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:39:50,930 INFO L495 AbstractCegarLoop]: Abstraction has 4111 states and 12247 transitions. [2022-11-22 02:39:50,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:39:50,931 INFO L276 IsEmpty]: Start isEmpty. Operand 4111 states and 12247 transitions. [2022-11-22 02:39:50,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 02:39:50,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:39:50,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:39:50,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 02:39:50,932 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-11-22 02:39:50,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:39:50,932 INFO L85 PathProgramCache]: Analyzing trace with hash -744715309, now seen corresponding path program 1 times [2022-11-22 02:39:50,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:39:50,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130990939] [2022-11-22 02:39:50,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:39:50,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:39:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:39:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:39:51,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:39:51,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130990939] [2022-11-22 02:39:51,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130990939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:39:51,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:39:51,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:39:51,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902697411] [2022-11-22 02:39:51,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:39:51,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:39:51,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:39:51,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:39:51,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:39:51,093 INFO L87 Difference]: Start difference. First operand 4111 states and 12247 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:39:51,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:39:51,198 INFO L93 Difference]: Finished difference Result 2791 states and 8417 transitions. [2022-11-22 02:39:51,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:39:51,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-22 02:39:51,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:39:51,212 INFO L225 Difference]: With dead ends: 2791 [2022-11-22 02:39:51,212 INFO L226 Difference]: Without dead ends: 2791 [2022-11-22 02:39:51,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:39:51,213 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 107 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:39:51,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 15 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:39:51,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2022-11-22 02:39:51,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2791. [2022-11-22 02:39:51,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2771 states have (on average 3.037531577047997) internal successors, (8417), 2790 states have internal predecessors, (8417), 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) [2022-11-22 02:39:51,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 8417 transitions. [2022-11-22 02:39:51,299 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 8417 transitions. Word has length 9 [2022-11-22 02:39:51,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:39:51,300 INFO L495 AbstractCegarLoop]: Abstraction has 2791 states and 8417 transitions. [2022-11-22 02:39:51,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:39:51,300 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 8417 transitions. [2022-11-22 02:39:51,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 02:39:51,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:39:51,302 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-22 02:39:51,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 02:39:51,302 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-11-22 02:39:51,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:39:51,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1268790838, now seen corresponding path program 1 times [2022-11-22 02:39:51,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:39:51,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065900124] [2022-11-22 02:39:51,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:39:51,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:39:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 02:39:51,316 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-22 02:39:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 02:39:51,329 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-22 02:39:51,330 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-22 02:39:51,330 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (96 of 97 remaining) [2022-11-22 02:39:51,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (95 of 97 remaining) [2022-11-22 02:39:51,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (94 of 97 remaining) [2022-11-22 02:39:51,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (93 of 97 remaining) [2022-11-22 02:39:51,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (92 of 97 remaining) [2022-11-22 02:39:51,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (91 of 97 remaining) [2022-11-22 02:39:51,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (90 of 97 remaining) [2022-11-22 02:39:51,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 97 remaining) [2022-11-22 02:39:51,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 97 remaining) [2022-11-22 02:39:51,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 97 remaining) [2022-11-22 02:39:51,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 97 remaining) [2022-11-22 02:39:51,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 97 remaining) [2022-11-22 02:39:51,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 97 remaining) [2022-11-22 02:39:51,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 97 remaining) [2022-11-22 02:39:51,334 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 97 remaining) [2022-11-22 02:39:51,334 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 97 remaining) [2022-11-22 02:39:51,334 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 97 remaining) [2022-11-22 02:39:51,334 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 97 remaining) [2022-11-22 02:39:51,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 97 remaining) [2022-11-22 02:39:51,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 97 remaining) [2022-11-22 02:39:51,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 97 remaining) [2022-11-22 02:39:51,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (75 of 97 remaining) [2022-11-22 02:39:51,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 97 remaining) [2022-11-22 02:39:51,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 97 remaining) [2022-11-22 02:39:51,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 97 remaining) [2022-11-22 02:39:51,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 97 remaining) [2022-11-22 02:39:51,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (70 of 97 remaining) [2022-11-22 02:39:51,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (69 of 97 remaining) [2022-11-22 02:39:51,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 97 remaining) [2022-11-22 02:39:51,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 97 remaining) [2022-11-22 02:39:51,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 97 remaining) [2022-11-22 02:39:51,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 97 remaining) [2022-11-22 02:39:51,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (64 of 97 remaining) [2022-11-22 02:39:51,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 97 remaining) [2022-11-22 02:39:51,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 97 remaining) [2022-11-22 02:39:51,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 97 remaining) [2022-11-22 02:39:51,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 97 remaining) [2022-11-22 02:39:51,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 97 remaining) [2022-11-22 02:39:51,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 97 remaining) [2022-11-22 02:39:51,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 97 remaining) [2022-11-22 02:39:51,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 97 remaining) [2022-11-22 02:39:51,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 97 remaining) [2022-11-22 02:39:51,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 97 remaining) [2022-11-22 02:39:51,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 97 remaining) [2022-11-22 02:39:51,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 97 remaining) [2022-11-22 02:39:51,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 97 remaining) [2022-11-22 02:39:51,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 97 remaining) [2022-11-22 02:39:51,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 97 remaining) [2022-11-22 02:39:51,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 97 remaining) [2022-11-22 02:39:51,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 97 remaining) [2022-11-22 02:39:51,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 97 remaining) [2022-11-22 02:39:51,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 97 remaining) [2022-11-22 02:39:51,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 97 remaining) [2022-11-22 02:39:51,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 97 remaining) [2022-11-22 02:39:51,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 97 remaining) [2022-11-22 02:39:51,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (41 of 97 remaining) [2022-11-22 02:39:51,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 97 remaining) [2022-11-22 02:39:51,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 97 remaining) [2022-11-22 02:39:51,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 97 remaining) [2022-11-22 02:39:51,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 97 remaining) [2022-11-22 02:39:51,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (36 of 97 remaining) [2022-11-22 02:39:51,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (35 of 97 remaining) [2022-11-22 02:39:51,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 97 remaining) [2022-11-22 02:39:51,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 97 remaining) [2022-11-22 02:39:51,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 97 remaining) [2022-11-22 02:39:51,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 97 remaining) [2022-11-22 02:39:51,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 97 remaining) [2022-11-22 02:39:51,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 97 remaining) [2022-11-22 02:39:51,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 97 remaining) [2022-11-22 02:39:51,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 97 remaining) [2022-11-22 02:39:51,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 97 remaining) [2022-11-22 02:39:51,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 97 remaining) [2022-11-22 02:39:51,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 97 remaining) [2022-11-22 02:39:51,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 97 remaining) [2022-11-22 02:39:51,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 97 remaining) [2022-11-22 02:39:51,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 97 remaining) [2022-11-22 02:39:51,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 97 remaining) [2022-11-22 02:39:51,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 97 remaining) [2022-11-22 02:39:51,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 97 remaining) [2022-11-22 02:39:51,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 97 remaining) [2022-11-22 02:39:51,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 97 remaining) [2022-11-22 02:39:51,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 97 remaining) [2022-11-22 02:39:51,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 97 remaining) [2022-11-22 02:39:51,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 97 remaining) [2022-11-22 02:39:51,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 97 remaining) [2022-11-22 02:39:51,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 97 remaining) [2022-11-22 02:39:51,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (10 of 97 remaining) [2022-11-22 02:39:51,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 97 remaining) [2022-11-22 02:39:51,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 97 remaining) [2022-11-22 02:39:51,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 97 remaining) [2022-11-22 02:39:51,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 97 remaining) [2022-11-22 02:39:51,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (5 of 97 remaining) [2022-11-22 02:39:51,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (4 of 97 remaining) [2022-11-22 02:39:51,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 97 remaining) [2022-11-22 02:39:51,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 97 remaining) [2022-11-22 02:39:51,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 97 remaining) [2022-11-22 02:39:51,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 97 remaining) [2022-11-22 02:39:51,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 02:39:51,355 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:39:51,356 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-22 02:39:51,356 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-22 02:39:51,543 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-22 02:39:51,548 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-22 02:39:51,548 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 334 places, 346 transitions, 713 flow [2022-11-22 02:39:51,549 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 334 places, 346 transitions, 713 flow [2022-11-22 02:39:51,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 334 places, 346 transitions, 713 flow [2022-11-22 02:39:51,682 INFO L130 PetriNetUnfolder]: 22/398 cut-off events. [2022-11-22 02:39:51,683 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-22 02:39:51,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 398 events. 22/398 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1437 event pairs, 0 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 318. Up to 8 conditions per place. [2022-11-22 02:39:51,726 INFO L119 LiptonReduction]: Number of co-enabled transitions 72000 [2022-11-22 02:40:12,309 INFO L134 LiptonReduction]: Checked pairs total: 194864 [2022-11-22 02:40:12,309 INFO L136 LiptonReduction]: Total number of compositions: 427 [2022-11-22 02:40:12,310 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 168 places, 176 transitions, 373 flow [2022-11-22 02:40:55,975 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1191669 states, 1023605 states have (on average 4.782619272082493) internal successors, (4895513), 1191668 states have internal predecessors, (4895513), 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) [2022-11-22 02:40:55,996 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:40:56,013 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@41a2d826, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:40:56,014 INFO L358 AbstractCegarLoop]: Starting to check reachability of 128 error locations. [2022-11-22 02:40:58,022 INFO L276 IsEmpty]: Start isEmpty. Operand has 1191669 states, 1023605 states have (on average 4.782619272082493) internal successors, (4895513), 1191668 states have internal predecessors, (4895513), 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) [2022-11-22 02:40:58,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 02:40:58,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:40:58,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 02:40:58,024 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 125 more)] === [2022-11-22 02:40:58,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:40:58,028 INFO L85 PathProgramCache]: Analyzing trace with hash 80664, now seen corresponding path program 1 times [2022-11-22 02:40:58,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:40:58,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326485751] [2022-11-22 02:40:58,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:40:58,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:40:58,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:40:58,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:40:58,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:40:58,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326485751] [2022-11-22 02:40:58,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326485751] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:40:58,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:40:58,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:40:58,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324293672] [2022-11-22 02:40:58,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:40:58,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 02:40:58,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:40:58,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 02:40:58,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 02:40:59,921 INFO L87 Difference]: Start difference. First operand has 1191669 states, 1023605 states have (on average 4.782619272082493) internal successors, (4895513), 1191668 states have internal predecessors, (4895513), 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, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 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)