./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/26_stack_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f884a4d-eced-47f3-bb91-bcf8fdea8b87/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f884a4d-eced-47f3-bb91-bcf8fdea8b87/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f884a4d-eced-47f3-bb91-bcf8fdea8b87/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f884a4d-eced-47f3-bb91-bcf8fdea8b87/bin/utaipan-Xvt2sAort0/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/26_stack_cas.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f884a4d-eced-47f3-bb91-bcf8fdea8b87/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f884a4d-eced-47f3-bb91-bcf8fdea8b87/bin/utaipan-Xvt2sAort0 --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 fa97ad6141e9aa8818b694f4968e766701fe7261f516cd86f7a15e5cf1a3d14d --- 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-e04fb08 [2022-11-16 20:31:23,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:31:23,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:31:23,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:31:23,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:31:23,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:31:23,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:31:23,962 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:31:23,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:31:23,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:31:23,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:31:23,975 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:31:23,976 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:31:23,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:31:23,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:31:23,982 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:31:23,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:31:23,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:31:23,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:31:23,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:31:23,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:31:23,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:31:24,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:31:24,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:31:24,004 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:31:24,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:31:24,004 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:31:24,009 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:31:24,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:31:24,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:31:24,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:31:24,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:31:24,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:31:24,015 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:31:24,018 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:31:24,018 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:31:24,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:31:24,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:31:24,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:31:24,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:31:24,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:31:24,024 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f884a4d-eced-47f3-bb91-bcf8fdea8b87/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-16 20:31:24,048 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:31:24,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:31:24,048 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:31:24,048 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:31:24,049 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:31:24,049 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:31:24,050 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:31:24,050 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:31:24,050 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:31:24,050 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:31:24,051 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:31:24,051 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:31:24,051 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:31:24,051 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:31:24,052 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:31:24,052 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:31:24,052 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:31:24,052 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:31:24,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 20:31:24,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 20:31:24,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:31:24,054 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:31:24,054 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 20:31:24,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:31:24,054 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:31:24,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:31:24,055 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 20:31:24,055 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 20:31:24,055 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 20:31:24,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:31:24,056 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 20:31:24,056 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:31:24,056 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:31:24,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:31:24,057 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:31:24,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:31:24,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:31:24,057 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:31:24,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:31:24,058 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:31:24,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:31:24,058 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:31:24,058 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_7f884a4d-eced-47f3-bb91-bcf8fdea8b87/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f884a4d-eced-47f3-bb91-bcf8fdea8b87/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa97ad6141e9aa8818b694f4968e766701fe7261f516cd86f7a15e5cf1a3d14d [2022-11-16 20:31:24,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:31:24,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:31:24,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:31:24,313 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:31:24,316 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:31:24,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f884a4d-eced-47f3-bb91-bcf8fdea8b87/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/pthread-ext/26_stack_cas.i [2022-11-16 20:31:24,416 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f884a4d-eced-47f3-bb91-bcf8fdea8b87/bin/utaipan-Xvt2sAort0/data/ba3ca61a1/8b19ff510be54f72b6493683db4f1c29/FLAGadc5e9821 [2022-11-16 20:31:24,960 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:31:24,961 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f884a4d-eced-47f3-bb91-bcf8fdea8b87/sv-benchmarks/c/pthread-ext/26_stack_cas.i [2022-11-16 20:31:24,987 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f884a4d-eced-47f3-bb91-bcf8fdea8b87/bin/utaipan-Xvt2sAort0/data/ba3ca61a1/8b19ff510be54f72b6493683db4f1c29/FLAGadc5e9821 [2022-11-16 20:31:25,218 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f884a4d-eced-47f3-bb91-bcf8fdea8b87/bin/utaipan-Xvt2sAort0/data/ba3ca61a1/8b19ff510be54f72b6493683db4f1c29 [2022-11-16 20:31:25,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:31:25,222 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:31:25,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:31:25,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:31:25,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:31:25,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:31:25" (1/1) ... [2022-11-16 20:31:25,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23c087f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:25, skipping insertion in model container [2022-11-16 20:31:25,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:31:25" (1/1) ... [2022-11-16 20:31:25,238 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:31:25,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:31:25,691 WARN L229 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_7f884a4d-eced-47f3-bb91-bcf8fdea8b87/sv-benchmarks/c/pthread-ext/26_stack_cas.i[31152,31165] [2022-11-16 20:31:25,704 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:31:25,720 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:31:25,763 WARN L229 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_7f884a4d-eced-47f3-bb91-bcf8fdea8b87/sv-benchmarks/c/pthread-ext/26_stack_cas.i[31152,31165] [2022-11-16 20:31:25,766 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:31:25,802 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:31:25,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:25 WrapperNode [2022-11-16 20:31:25,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:31:25,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:31:25,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:31:25,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:31:25,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:25" (1/1) ... [2022-11-16 20:31:25,845 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:25" (1/1) ... [2022-11-16 20:31:25,884 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 189 [2022-11-16 20:31:25,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:31:25,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:31:25,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:31:25,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:31:25,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:25" (1/1) ... [2022-11-16 20:31:25,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:25" (1/1) ... [2022-11-16 20:31:25,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:25" (1/1) ... [2022-11-16 20:31:25,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:25" (1/1) ... [2022-11-16 20:31:25,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:25" (1/1) ... [2022-11-16 20:31:25,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:25" (1/1) ... [2022-11-16 20:31:25,937 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:25" (1/1) ... [2022-11-16 20:31:25,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:25" (1/1) ... [2022-11-16 20:31:25,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:31:25,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:31:25,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:31:25,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:31:25,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:25" (1/1) ... [2022-11-16 20:31:25,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:31:25,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f884a4d-eced-47f3-bb91-bcf8fdea8b87/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:31:26,000 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f884a4d-eced-47f3-bb91-bcf8fdea8b87/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:31:26,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f884a4d-eced-47f3-bb91-bcf8fdea8b87/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:31:26,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 20:31:26,046 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-16 20:31:26,047 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-16 20:31:26,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 20:31:26,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:31:26,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 20:31:26,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 20:31:26,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:31:26,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:31:26,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:31:26,049 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 20:31:26,180 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:31:26,187 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:31:26,769 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:31:27,149 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:31:27,150 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 20:31:27,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:31:27 BoogieIcfgContainer [2022-11-16 20:31:27,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:31:27,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:31:27,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:31:27,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:31:27,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:31:25" (1/3) ... [2022-11-16 20:31:27,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce2ca71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:31:27, skipping insertion in model container [2022-11-16 20:31:27,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:25" (2/3) ... [2022-11-16 20:31:27,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce2ca71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:31:27, skipping insertion in model container [2022-11-16 20:31:27,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:31:27" (3/3) ... [2022-11-16 20:31:27,162 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas.i [2022-11-16 20:31:27,182 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:31:27,182 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2022-11-16 20:31:27,182 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 20:31:27,320 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 20:31:27,371 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 20:31:27,390 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 170 transitions, 345 flow [2022-11-16 20:31:27,393 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 170 transitions, 345 flow [2022-11-16 20:31:27,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 170 transitions, 345 flow [2022-11-16 20:31:27,534 INFO L130 PetriNetUnfolder]: 11/186 cut-off events. [2022-11-16 20:31:27,535 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 20:31:27,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 186 events. 11/186 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 379 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 142. Up to 4 conditions per place. [2022-11-16 20:31:27,553 INFO L119 LiptonReduction]: Number of co-enabled transitions 4712 [2022-11-16 20:31:38,767 INFO L134 LiptonReduction]: Checked pairs total: 7572 [2022-11-16 20:31:38,767 INFO L136 LiptonReduction]: Total number of compositions: 217 [2022-11-16 20:31:38,775 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 64 places, 67 transitions, 139 flow [2022-11-16 20:31:38,815 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 429 states, 227 states have (on average 3.6916299559471364) internal successors, (838), 428 states have internal predecessors, (838), 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) [2022-11-16 20:31:38,840 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:31:38,846 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;@6318a0df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:31:38,846 INFO L358 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2022-11-16 20:31:38,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 429 states, 227 states have (on average 3.6916299559471364) internal successors, (838), 428 states have internal predecessors, (838), 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) [2022-11-16 20:31:38,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 20:31:38,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:31:38,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 20:31:38,856 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-11-16 20:31:38,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:31:38,861 INFO L85 PathProgramCache]: Analyzing trace with hash 35062, now seen corresponding path program 1 times [2022-11-16 20:31:38,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:31:38,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896239705] [2022-11-16 20:31:38,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:31:38,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:31:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:31:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:31:39,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:31:39,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896239705] [2022-11-16 20:31:39,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896239705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:31:39,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:31:39,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 20:31:39,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277830706] [2022-11-16 20:31:39,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:31:39,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:31:39,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:31:39,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:31:39,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:31:39,139 INFO L87 Difference]: Start difference. First operand has 429 states, 227 states have (on average 3.6916299559471364) internal successors, (838), 428 states have internal predecessors, (838), 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) [2022-11-16 20:31:39,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:31:39,333 INFO L93 Difference]: Finished difference Result 295 states and 557 transitions. [2022-11-16 20:31:39,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:31:39,335 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 [2022-11-16 20:31:39,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:31:39,347 INFO L225 Difference]: With dead ends: 295 [2022-11-16 20:31:39,347 INFO L226 Difference]: Without dead ends: 295 [2022-11-16 20:31:39,348 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 [2022-11-16 20:31:39,351 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 38 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:31:39,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 2 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:31:39,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-11-16 20:31:39,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 230. [2022-11-16 20:31:39,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 176 states have (on average 2.6306818181818183) internal successors, (463), 229 states have internal predecessors, (463), 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) [2022-11-16 20:31:39,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 463 transitions. [2022-11-16 20:31:39,403 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 463 transitions. Word has length 2 [2022-11-16 20:31:39,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:31:39,403 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 463 transitions. [2022-11-16 20:31:39,404 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) [2022-11-16 20:31:39,404 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 463 transitions. [2022-11-16 20:31:39,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 20:31:39,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:31:39,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 20:31:39,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 20:31:39,405 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-11-16 20:31:39,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:31:39,406 INFO L85 PathProgramCache]: Analyzing trace with hash 35063, now seen corresponding path program 1 times [2022-11-16 20:31:39,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:31:39,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514148477] [2022-11-16 20:31:39,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:31:39,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:31:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:31:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:31:39,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:31:39,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514148477] [2022-11-16 20:31:39,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514148477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:31:39,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:31:39,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 20:31:39,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653665656] [2022-11-16 20:31:39,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:31:39,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:31:39,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:31:39,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:31:39,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:31:39,576 INFO L87 Difference]: Start difference. First operand 230 states and 463 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) [2022-11-16 20:31:39,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:31:39,661 INFO L93 Difference]: Finished difference Result 196 states and 374 transitions. [2022-11-16 20:31:39,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:31:39,661 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 [2022-11-16 20:31:39,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:31:39,663 INFO L225 Difference]: With dead ends: 196 [2022-11-16 20:31:39,664 INFO L226 Difference]: Without dead ends: 196 [2022-11-16 20:31:39,664 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 [2022-11-16 20:31:39,665 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:31:39,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 1 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:31:39,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-16 20:31:39,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-11-16 20:31:39,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 163 states have (on average 2.294478527607362) internal successors, (374), 195 states have internal predecessors, (374), 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) [2022-11-16 20:31:39,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 374 transitions. [2022-11-16 20:31:39,682 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 374 transitions. Word has length 2 [2022-11-16 20:31:39,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:31:39,682 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 374 transitions. [2022-11-16 20:31:39,682 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) [2022-11-16 20:31:39,683 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 374 transitions. [2022-11-16 20:31:39,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 20:31:39,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:31:39,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 20:31:39,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 20:31:39,684 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-11-16 20:31:39,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:31:39,685 INFO L85 PathProgramCache]: Analyzing trace with hash 33720917, now seen corresponding path program 1 times [2022-11-16 20:31:39,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:31:39,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099652369] [2022-11-16 20:31:39,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:31:39,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:31:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:31:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:31:39,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:31:39,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099652369] [2022-11-16 20:31:39,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099652369] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:31:39,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:31:39,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:31:39,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736222768] [2022-11-16 20:31:39,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:31:39,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:31:39,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:31:39,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:31:39,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:31:39,901 INFO L87 Difference]: Start difference. First operand 196 states and 374 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) [2022-11-16 20:31:40,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:31:40,048 INFO L93 Difference]: Finished difference Result 226 states and 421 transitions. [2022-11-16 20:31:40,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:31:40,048 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 [2022-11-16 20:31:40,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:31:40,053 INFO L225 Difference]: With dead ends: 226 [2022-11-16 20:31:40,053 INFO L226 Difference]: Without dead ends: 226 [2022-11-16 20:31:40,054 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 [2022-11-16 20:31:40,058 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 60 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 2 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 [2022-11-16 20:31:40,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 2 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:31:40,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-11-16 20:31:40,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 188. [2022-11-16 20:31:40,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 157 states have (on average 2.2929936305732483) internal successors, (360), 187 states have internal predecessors, (360), 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) [2022-11-16 20:31:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 360 transitions. [2022-11-16 20:31:40,077 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 360 transitions. Word has length 4 [2022-11-16 20:31:40,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:31:40,078 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 360 transitions. [2022-11-16 20:31:40,078 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) [2022-11-16 20:31:40,078 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 360 transitions. [2022-11-16 20:31:40,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 20:31:40,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:31:40,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 20:31:40,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 20:31:40,079 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-11-16 20:31:40,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:31:40,080 INFO L85 PathProgramCache]: Analyzing trace with hash 33720918, now seen corresponding path program 1 times [2022-11-16 20:31:40,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:31:40,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984192523] [2022-11-16 20:31:40,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:31:40,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:31:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:31:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:31:40,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:31:40,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984192523] [2022-11-16 20:31:40,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984192523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:31:40,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:31:40,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:31:40,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468514203] [2022-11-16 20:31:40,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:31:40,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:31:40,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:31:40,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:31:40,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:31:40,270 INFO L87 Difference]: Start difference. First operand 188 states and 360 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) [2022-11-16 20:31:40,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:31:40,352 INFO L93 Difference]: Finished difference Result 180 states and 346 transitions. [2022-11-16 20:31:40,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:31:40,355 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 [2022-11-16 20:31:40,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:31:40,356 INFO L225 Difference]: With dead ends: 180 [2022-11-16 20:31:40,357 INFO L226 Difference]: Without dead ends: 180 [2022-11-16 20:31:40,357 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 [2022-11-16 20:31:40,360 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 70 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:31:40,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 1 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:31:40,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-16 20:31:40,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-11-16 20:31:40,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 151 states have (on average 2.2913907284768213) internal successors, (346), 179 states have internal predecessors, (346), 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) [2022-11-16 20:31:40,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 346 transitions. [2022-11-16 20:31:40,383 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 346 transitions. Word has length 4 [2022-11-16 20:31:40,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:31:40,384 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 346 transitions. [2022-11-16 20:31:40,384 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) [2022-11-16 20:31:40,384 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 346 transitions. [2022-11-16 20:31:40,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 20:31:40,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:31:40,385 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 20:31:40,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 20:31:40,385 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-11-16 20:31:40,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:31:40,386 INFO L85 PathProgramCache]: Analyzing trace with hash 33721000, now seen corresponding path program 1 times [2022-11-16 20:31:40,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:31:40,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423305286] [2022-11-16 20:31:40,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:31:40,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:31:40,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:31:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:31:40,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:31:40,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423305286] [2022-11-16 20:31:40,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423305286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:31:40,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:31:40,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:31:40,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623773517] [2022-11-16 20:31:40,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:31:40,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:31:40,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:31:40,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:31:40,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:31:40,532 INFO L87 Difference]: Start difference. First operand 180 states and 346 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) [2022-11-16 20:31:40,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:31:40,609 INFO L93 Difference]: Finished difference Result 164 states and 317 transitions. [2022-11-16 20:31:40,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:31:40,609 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 [2022-11-16 20:31:40,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:31:40,610 INFO L225 Difference]: With dead ends: 164 [2022-11-16 20:31:40,611 INFO L226 Difference]: Without dead ends: 164 [2022-11-16 20:31:40,612 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 [2022-11-16 20:31:40,613 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:31:40,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:31:40,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-16 20:31:40,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-11-16 20:31:40,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 140 states have (on average 2.2642857142857142) internal successors, (317), 163 states have internal predecessors, (317), 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) [2022-11-16 20:31:40,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 317 transitions. [2022-11-16 20:31:40,624 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 317 transitions. Word has length 4 [2022-11-16 20:31:40,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:31:40,624 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 317 transitions. [2022-11-16 20:31:40,624 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) [2022-11-16 20:31:40,624 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 317 transitions. [2022-11-16 20:31:40,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 20:31:40,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:31:40,625 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 20:31:40,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 20:31:40,627 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-11-16 20:31:40,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:31:40,630 INFO L85 PathProgramCache]: Analyzing trace with hash 33721001, now seen corresponding path program 1 times [2022-11-16 20:31:40,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:31:40,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591546996] [2022-11-16 20:31:40,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:31:40,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:31:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:31:40,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:31:40,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:31:40,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591546996] [2022-11-16 20:31:40,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591546996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:31:40,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:31:40,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:31:40,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024307196] [2022-11-16 20:31:40,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:31:40,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:31:40,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:31:40,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:31:40,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:31:40,751 INFO L87 Difference]: Start difference. First operand 164 states and 317 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) [2022-11-16 20:31:40,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:31:40,893 INFO L93 Difference]: Finished difference Result 197 states and 375 transitions. [2022-11-16 20:31:40,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:31:40,893 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 [2022-11-16 20:31:40,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:31:40,894 INFO L225 Difference]: With dead ends: 197 [2022-11-16 20:31:40,895 INFO L226 Difference]: Without dead ends: 197 [2022-11-16 20:31:40,895 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 [2022-11-16 20:31:40,895 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 59 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:31:40,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 4 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:31:40,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-16 20:31:40,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 171. [2022-11-16 20:31:40,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 148 states have (on average 2.2972972972972974) internal successors, (340), 170 states have internal predecessors, (340), 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) [2022-11-16 20:31:40,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 340 transitions. [2022-11-16 20:31:40,902 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 340 transitions. Word has length 4 [2022-11-16 20:31:40,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:31:40,902 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 340 transitions. [2022-11-16 20:31:40,902 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) [2022-11-16 20:31:40,902 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 340 transitions. [2022-11-16 20:31:40,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 20:31:40,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:31:40,903 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-16 20:31:40,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 20:31:40,904 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-11-16 20:31:40,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:31:40,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1953892075, now seen corresponding path program 1 times [2022-11-16 20:31:40,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:31:40,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169197344] [2022-11-16 20:31:40,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:31:40,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:31:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 20:31:40,915 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 20:31:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 20:31:40,941 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-16 20:31:40,941 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 20:31:40,942 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (81 of 82 remaining) [2022-11-16 20:31:40,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 82 remaining) [2022-11-16 20:31:40,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 82 remaining) [2022-11-16 20:31:40,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 82 remaining) [2022-11-16 20:31:40,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 82 remaining) [2022-11-16 20:31:40,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 82 remaining) [2022-11-16 20:31:40,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 82 remaining) [2022-11-16 20:31:40,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 82 remaining) [2022-11-16 20:31:40,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 82 remaining) [2022-11-16 20:31:40,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 82 remaining) [2022-11-16 20:31:40,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 82 remaining) [2022-11-16 20:31:40,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 82 remaining) [2022-11-16 20:31:40,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 82 remaining) [2022-11-16 20:31:40,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 82 remaining) [2022-11-16 20:31:40,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 82 remaining) [2022-11-16 20:31:40,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 82 remaining) [2022-11-16 20:31:40,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 82 remaining) [2022-11-16 20:31:40,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 82 remaining) [2022-11-16 20:31:40,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 82 remaining) [2022-11-16 20:31:40,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 82 remaining) [2022-11-16 20:31:40,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 82 remaining) [2022-11-16 20:31:40,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 82 remaining) [2022-11-16 20:31:40,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 82 remaining) [2022-11-16 20:31:40,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (58 of 82 remaining) [2022-11-16 20:31:40,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 82 remaining) [2022-11-16 20:31:40,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 82 remaining) [2022-11-16 20:31:40,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (55 of 82 remaining) [2022-11-16 20:31:40,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 82 remaining) [2022-11-16 20:31:40,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 82 remaining) [2022-11-16 20:31:40,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (52 of 82 remaining) [2022-11-16 20:31:40,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 82 remaining) [2022-11-16 20:31:40,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 82 remaining) [2022-11-16 20:31:40,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 82 remaining) [2022-11-16 20:31:40,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 82 remaining) [2022-11-16 20:31:40,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 82 remaining) [2022-11-16 20:31:40,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 82 remaining) [2022-11-16 20:31:40,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 82 remaining) [2022-11-16 20:31:40,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 82 remaining) [2022-11-16 20:31:40,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 82 remaining) [2022-11-16 20:31:40,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 82 remaining) [2022-11-16 20:31:40,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (41 of 82 remaining) [2022-11-16 20:31:40,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 82 remaining) [2022-11-16 20:31:40,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 82 remaining) [2022-11-16 20:31:40,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 82 remaining) [2022-11-16 20:31:40,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 82 remaining) [2022-11-16 20:31:40,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 82 remaining) [2022-11-16 20:31:40,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 82 remaining) [2022-11-16 20:31:40,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 82 remaining) [2022-11-16 20:31:40,954 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 82 remaining) [2022-11-16 20:31:40,954 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 82 remaining) [2022-11-16 20:31:40,954 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 82 remaining) [2022-11-16 20:31:40,954 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 82 remaining) [2022-11-16 20:31:40,954 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 82 remaining) [2022-11-16 20:31:40,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 82 remaining) [2022-11-16 20:31:40,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 82 remaining) [2022-11-16 20:31:40,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 82 remaining) [2022-11-16 20:31:40,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 82 remaining) [2022-11-16 20:31:40,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 82 remaining) [2022-11-16 20:31:40,956 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 82 remaining) [2022-11-16 20:31:40,956 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 82 remaining) [2022-11-16 20:31:40,956 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 82 remaining) [2022-11-16 20:31:40,956 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 82 remaining) [2022-11-16 20:31:40,957 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 82 remaining) [2022-11-16 20:31:40,957 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 82 remaining) [2022-11-16 20:31:40,957 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 82 remaining) [2022-11-16 20:31:40,957 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (16 of 82 remaining) [2022-11-16 20:31:40,957 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 82 remaining) [2022-11-16 20:31:40,957 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 82 remaining) [2022-11-16 20:31:40,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (13 of 82 remaining) [2022-11-16 20:31:40,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 82 remaining) [2022-11-16 20:31:40,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 82 remaining) [2022-11-16 20:31:40,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (10 of 82 remaining) [2022-11-16 20:31:40,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 82 remaining) [2022-11-16 20:31:40,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 82 remaining) [2022-11-16 20:31:40,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 82 remaining) [2022-11-16 20:31:40,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 82 remaining) [2022-11-16 20:31:40,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 82 remaining) [2022-11-16 20:31:40,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 82 remaining) [2022-11-16 20:31:40,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 82 remaining) [2022-11-16 20:31:40,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 82 remaining) [2022-11-16 20:31:40,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 82 remaining) [2022-11-16 20:31:40,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 82 remaining) [2022-11-16 20:31:40,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 20:31:40,963 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:31:40,965 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 20:31:40,965 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-16 20:31:41,035 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 20:31:41,039 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 20:31:41,039 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 281 places, 295 transitions, 602 flow [2022-11-16 20:31:41,040 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 281 places, 295 transitions, 602 flow [2022-11-16 20:31:41,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 295 transitions, 602 flow [2022-11-16 20:31:41,134 INFO L130 PetriNetUnfolder]: 21/329 cut-off events. [2022-11-16 20:31:41,134 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 20:31:41,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339 conditions, 329 events. 21/329 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1022 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 266. Up to 6 conditions per place. [2022-11-16 20:31:41,182 INFO L119 LiptonReduction]: Number of co-enabled transitions 40424 [2022-11-16 20:31:53,398 INFO L134 LiptonReduction]: Checked pairs total: 107616 [2022-11-16 20:31:53,398 INFO L136 LiptonReduction]: Total number of compositions: 288 [2022-11-16 20:31:53,399 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 135 places, 144 transitions, 300 flow [2022-11-16 20:31:54,444 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 33432 states, 25271 states have (on average 4.064579953306161) internal successors, (102716), 33431 states have internal predecessors, (102716), 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) [2022-11-16 20:31:54,454 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:31:54,455 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;@6318a0df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:31:54,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 121 error locations. [2022-11-16 20:31:54,509 INFO L276 IsEmpty]: Start isEmpty. Operand has 33432 states, 25271 states have (on average 4.064579953306161) internal successors, (102716), 33431 states have internal predecessors, (102716), 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) [2022-11-16 20:31:54,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 20:31:54,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:31:54,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 20:31:54,510 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-16 20:31:54,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:31:54,511 INFO L85 PathProgramCache]: Analyzing trace with hash 57725, now seen corresponding path program 1 times [2022-11-16 20:31:54,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:31:54,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890580766] [2022-11-16 20:31:54,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:31:54,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:31:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:31:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:31:54,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:31:54,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890580766] [2022-11-16 20:31:54,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890580766] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:31:54,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:31:54,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 20:31:54,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072855731] [2022-11-16 20:31:54,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:31:54,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 20:31:54,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:31:54,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 20:31:54,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 20:31:54,582 INFO L87 Difference]: Start difference. First operand has 33432 states, 25271 states have (on average 4.064579953306161) internal successors, (102716), 33431 states have internal predecessors, (102716), 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) [2022-11-16 20:31:55,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:31:55,052 INFO L93 Difference]: Finished difference Result 16763 states and 50373 transitions. [2022-11-16 20:31:55,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 20:31:55,053 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 2 [2022-11-16 20:31:55,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:31:55,303 INFO L225 Difference]: With dead ends: 16763 [2022-11-16 20:31:55,323 INFO L226 Difference]: Without dead ends: 16763 [2022-11-16 20:31:55,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 20:31:55,324 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:31:55,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:31:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16763 states. [2022-11-16 20:31:55,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16763 to 16763. [2022-11-16 20:31:55,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16763 states, 14353 states have (on average 3.5095798787709884) internal successors, (50373), 16762 states have internal predecessors, (50373), 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) [2022-11-16 20:31:56,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16763 states to 16763 states and 50373 transitions. [2022-11-16 20:31:56,076 INFO L78 Accepts]: Start accepts. Automaton has 16763 states and 50373 transitions. Word has length 2 [2022-11-16 20:31:56,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:31:56,077 INFO L495 AbstractCegarLoop]: Abstraction has 16763 states and 50373 transitions. [2022-11-16 20:31:56,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-11-16 20:31:56,077 INFO L276 IsEmpty]: Start isEmpty. Operand 16763 states and 50373 transitions. [2022-11-16 20:31:56,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 20:31:56,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:31:56,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 20:31:56,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 20:31:56,078 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-16 20:31:56,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:31:56,079 INFO L85 PathProgramCache]: Analyzing trace with hash 57695, now seen corresponding path program 1 times [2022-11-16 20:31:56,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:31:56,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296112434] [2022-11-16 20:31:56,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:31:56,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:31:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:31:56,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:31:56,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:31:56,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296112434] [2022-11-16 20:31:56,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296112434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:31:56,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:31:56,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 20:31:56,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737425878] [2022-11-16 20:31:56,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:31:56,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:31:56,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:31:56,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:31:56,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:31:56,233 INFO L87 Difference]: Start difference. First operand 16763 states and 50373 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) [2022-11-16 20:31:56,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:31:56,605 INFO L93 Difference]: Finished difference Result 14361 states and 42826 transitions. [2022-11-16 20:31:56,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:31:56,607 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 [2022-11-16 20:31:56,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:31:56,689 INFO L225 Difference]: With dead ends: 14361 [2022-11-16 20:31:56,690 INFO L226 Difference]: Without dead ends: 14361 [2022-11-16 20:31:56,690 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 [2022-11-16 20:31:56,691 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 110 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:31:56,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 15 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:31:56,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14361 states. [2022-11-16 20:31:57,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14361 to 14361. [2022-11-16 20:31:57,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14361 states, 12764 states have (on average 3.3552178000626762) internal successors, (42826), 14360 states have internal predecessors, (42826), 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) [2022-11-16 20:31:57,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14361 states to 14361 states and 42826 transitions. [2022-11-16 20:31:57,240 INFO L78 Accepts]: Start accepts. Automaton has 14361 states and 42826 transitions. Word has length 2 [2022-11-16 20:31:57,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:31:57,240 INFO L495 AbstractCegarLoop]: Abstraction has 14361 states and 42826 transitions. [2022-11-16 20:31:57,241 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) [2022-11-16 20:31:57,241 INFO L276 IsEmpty]: Start isEmpty. Operand 14361 states and 42826 transitions. [2022-11-16 20:31:57,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 20:31:57,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:31:57,241 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 20:31:57,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 20:31:57,242 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-16 20:31:57,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:31:57,242 INFO L85 PathProgramCache]: Analyzing trace with hash 57696, now seen corresponding path program 1 times [2022-11-16 20:31:57,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:31:57,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904497699] [2022-11-16 20:31:57,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:31:57,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:31:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:31:57,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:31:57,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:31:57,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904497699] [2022-11-16 20:31:57,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904497699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:31:57,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:31:57,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 20:31:57,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909884790] [2022-11-16 20:31:57,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:31:57,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:31:57,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:31:57,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:31:57,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:31:57,277 INFO L87 Difference]: Start difference. First operand 14361 states and 42826 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) [2022-11-16 20:31:57,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:31:57,922 INFO L93 Difference]: Finished difference Result 24554 states and 72864 transitions. [2022-11-16 20:31:57,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:31:57,923 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 [2022-11-16 20:31:57,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:31:58,186 INFO L225 Difference]: With dead ends: 24554 [2022-11-16 20:31:58,187 INFO L226 Difference]: Without dead ends: 24554 [2022-11-16 20:31:58,187 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 [2022-11-16 20:31:58,188 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 105 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:31:58,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 30 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:31:58,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24554 states. [2022-11-16 20:31:58,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24554 to 20214. [2022-11-16 20:31:58,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20214 states, 18674 states have (on average 3.282210560137089) internal successors, (61292), 20213 states have internal predecessors, (61292), 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) [2022-11-16 20:31:58,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20214 states to 20214 states and 61292 transitions. [2022-11-16 20:31:58,865 INFO L78 Accepts]: Start accepts. Automaton has 20214 states and 61292 transitions. Word has length 2 [2022-11-16 20:31:58,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:31:58,865 INFO L495 AbstractCegarLoop]: Abstraction has 20214 states and 61292 transitions. [2022-11-16 20:31:58,865 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) [2022-11-16 20:31:58,865 INFO L276 IsEmpty]: Start isEmpty. Operand 20214 states and 61292 transitions. [2022-11-16 20:31:58,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 20:31:58,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:31:58,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 20:31:58,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 20:31:58,866 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-16 20:31:58,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:31:58,867 INFO L85 PathProgramCache]: Analyzing trace with hash 55494526, now seen corresponding path program 1 times [2022-11-16 20:31:58,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:31:58,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391297266] [2022-11-16 20:31:58,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:31:58,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:31:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:31:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:31:58,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:31:58,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391297266] [2022-11-16 20:31:58,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391297266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:31:58,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:31:58,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:31:58,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537942684] [2022-11-16 20:31:58,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:31:58,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:31:58,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:31:58,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:31:58,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:31:58,970 INFO L87 Difference]: Start difference. First operand 20214 states and 61292 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) [2022-11-16 20:32:00,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:32:00,061 INFO L93 Difference]: Finished difference Result 38194 states and 114653 transitions. [2022-11-16 20:32:00,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:32:00,061 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 [2022-11-16 20:32:00,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:32:00,265 INFO L225 Difference]: With dead ends: 38194 [2022-11-16 20:32:00,265 INFO L226 Difference]: Without dead ends: 38194 [2022-11-16 20:32:00,265 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 [2022-11-16 20:32:00,266 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 276 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 20:32:00,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 58 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 20:32:00,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38194 states. [2022-11-16 20:32:01,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38194 to 22223. [2022-11-16 20:32:01,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22223 states, 20707 states have (on average 3.3412855556092143) internal successors, (69188), 22222 states have internal predecessors, (69188), 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) [2022-11-16 20:32:01,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22223 states to 22223 states and 69188 transitions. [2022-11-16 20:32:01,343 INFO L78 Accepts]: Start accepts. Automaton has 22223 states and 69188 transitions. Word has length 4 [2022-11-16 20:32:01,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:32:01,343 INFO L495 AbstractCegarLoop]: Abstraction has 22223 states and 69188 transitions. [2022-11-16 20:32:01,344 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) [2022-11-16 20:32:01,344 INFO L276 IsEmpty]: Start isEmpty. Operand 22223 states and 69188 transitions. [2022-11-16 20:32:01,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 20:32:01,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:32:01,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 20:32:01,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 20:32:01,345 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-16 20:32:01,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:32:01,345 INFO L85 PathProgramCache]: Analyzing trace with hash 55494527, now seen corresponding path program 1 times [2022-11-16 20:32:01,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:32:01,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116194962] [2022-11-16 20:32:01,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:32:01,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:32:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:32:01,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:32:01,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:32:01,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116194962] [2022-11-16 20:32:01,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116194962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:32:01,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:32:01,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:32:01,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969738698] [2022-11-16 20:32:01,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:32:01,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:32:01,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:32:01,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:32:01,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:32:01,539 INFO L87 Difference]: Start difference. First operand 22223 states and 69188 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) [2022-11-16 20:32:01,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:32:01,853 INFO L93 Difference]: Finished difference Result 20769 states and 64251 transitions. [2022-11-16 20:32:01,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:32:01,853 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 [2022-11-16 20:32:01,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:32:01,952 INFO L225 Difference]: With dead ends: 20769 [2022-11-16 20:32:01,952 INFO L226 Difference]: Without dead ends: 20769 [2022-11-16 20:32:01,952 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 [2022-11-16 20:32:01,953 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 106 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:32:01,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 15 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:32:02,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20769 states. [2022-11-16 20:32:02,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20769 to 20769. [2022-11-16 20:32:02,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20769 states, 19437 states have (on average 3.305602716468591) internal successors, (64251), 20768 states have internal predecessors, (64251), 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) [2022-11-16 20:32:02,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20769 states to 20769 states and 64251 transitions. [2022-11-16 20:32:02,703 INFO L78 Accepts]: Start accepts. Automaton has 20769 states and 64251 transitions. Word has length 4 [2022-11-16 20:32:02,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:32:02,703 INFO L495 AbstractCegarLoop]: Abstraction has 20769 states and 64251 transitions. [2022-11-16 20:32:02,703 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) [2022-11-16 20:32:02,704 INFO L276 IsEmpty]: Start isEmpty. Operand 20769 states and 64251 transitions. [2022-11-16 20:32:02,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 20:32:02,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:32:02,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 20:32:02,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 20:32:02,705 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-16 20:32:02,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:32:02,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1720334749, now seen corresponding path program 1 times [2022-11-16 20:32:02,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:32:02,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988789990] [2022-11-16 20:32:02,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:32:02,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:32:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:32:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:32:02,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:32:02,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988789990] [2022-11-16 20:32:02,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988789990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:32:02,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:32:02,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:32:02,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605709532] [2022-11-16 20:32:02,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:32:02,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:32:02,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:32:02,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:32:02,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:32:02,800 INFO L87 Difference]: Start difference. First operand 20769 states and 64251 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:32:03,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:32:03,594 INFO L93 Difference]: Finished difference Result 34578 states and 104891 transitions. [2022-11-16 20:32:03,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:32:03,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 20:32:03,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:32:03,700 INFO L225 Difference]: With dead ends: 34578 [2022-11-16 20:32:03,700 INFO L226 Difference]: Without dead ends: 34578 [2022-11-16 20:32:03,700 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 [2022-11-16 20:32:03,701 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 247 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:32:03,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 51 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 20:32:03,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34578 states. [2022-11-16 20:32:04,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34578 to 26576. [2022-11-16 20:32:04,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26576 states, 25272 states have (on average 3.4295663184552074) internal successors, (86672), 26575 states have internal predecessors, (86672), 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) [2022-11-16 20:32:04,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26576 states to 26576 states and 86672 transitions. [2022-11-16 20:32:04,920 INFO L78 Accepts]: Start accepts. Automaton has 26576 states and 86672 transitions. Word has length 5 [2022-11-16 20:32:04,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:32:04,920 INFO L495 AbstractCegarLoop]: Abstraction has 26576 states and 86672 transitions. [2022-11-16 20:32:04,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:32:04,920 INFO L276 IsEmpty]: Start isEmpty. Operand 26576 states and 86672 transitions. [2022-11-16 20:32:04,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 20:32:04,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:32:04,921 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 20:32:04,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 20:32:04,921 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-16 20:32:04,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:32:04,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1720334750, now seen corresponding path program 1 times [2022-11-16 20:32:04,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:32:04,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737251596] [2022-11-16 20:32:04,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:32:04,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:32:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:32:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:32:04,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:32:04,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737251596] [2022-11-16 20:32:04,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737251596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:32:04,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:32:04,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 20:32:04,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720094820] [2022-11-16 20:32:04,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:32:04,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:32:04,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:32:04,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:32:04,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:32:04,998 INFO L87 Difference]: Start difference. First operand 26576 states and 86672 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:32:05,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:32:05,337 INFO L93 Difference]: Finished difference Result 22725 states and 73225 transitions. [2022-11-16 20:32:05,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:32:05,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 20:32:05,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:32:05,424 INFO L225 Difference]: With dead ends: 22725 [2022-11-16 20:32:05,424 INFO L226 Difference]: Without dead ends: 22725 [2022-11-16 20:32:05,425 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 [2022-11-16 20:32:05,425 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 95 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:32:05,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 13 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:32:05,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22725 states. [2022-11-16 20:32:06,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22725 to 22725. [2022-11-16 20:32:06,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22725 states, 21789 states have (on average 3.3606406902565515) internal successors, (73225), 22724 states have internal predecessors, (73225), 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) [2022-11-16 20:32:06,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22725 states to 22725 states and 73225 transitions. [2022-11-16 20:32:06,351 INFO L78 Accepts]: Start accepts. Automaton has 22725 states and 73225 transitions. Word has length 5 [2022-11-16 20:32:06,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:32:06,351 INFO L495 AbstractCegarLoop]: Abstraction has 22725 states and 73225 transitions. [2022-11-16 20:32:06,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:32:06,352 INFO L276 IsEmpty]: Start isEmpty. Operand 22725 states and 73225 transitions. [2022-11-16 20:32:06,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 20:32:06,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:32:06,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:32:06,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 20:32:06,353 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-16 20:32:06,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:32:06,353 INFO L85 PathProgramCache]: Analyzing trace with hash 458757281, now seen corresponding path program 1 times [2022-11-16 20:32:06,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:32:06,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303176896] [2022-11-16 20:32:06,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:32:06,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:32:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:32:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:32:06,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:32:06,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303176896] [2022-11-16 20:32:06,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303176896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:32:06,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:32:06,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:32:06,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949133504] [2022-11-16 20:32:06,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:32:06,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:32:06,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:32:06,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:32:06,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:32:06,414 INFO L87 Difference]: Start difference. First operand 22725 states and 73225 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:32:06,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:32:06,884 INFO L93 Difference]: Finished difference Result 25359 states and 80407 transitions. [2022-11-16 20:32:06,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 20:32:06,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 20:32:06,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:32:06,960 INFO L225 Difference]: With dead ends: 25359 [2022-11-16 20:32:06,960 INFO L226 Difference]: Without dead ends: 25359 [2022-11-16 20:32:06,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:32:06,961 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 227 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:32:06,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 57 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:32:07,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25359 states. [2022-11-16 20:32:07,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25359 to 23363. [2022-11-16 20:32:07,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23363 states, 22391 states have (on average 3.3394667500334956) internal successors, (74774), 23362 states have internal predecessors, (74774), 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) [2022-11-16 20:32:07,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23363 states to 23363 states and 74774 transitions. [2022-11-16 20:32:07,750 INFO L78 Accepts]: Start accepts. Automaton has 23363 states and 74774 transitions. Word has length 10 [2022-11-16 20:32:07,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:32:07,750 INFO L495 AbstractCegarLoop]: Abstraction has 23363 states and 74774 transitions. [2022-11-16 20:32:07,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:32:07,751 INFO L276 IsEmpty]: Start isEmpty. Operand 23363 states and 74774 transitions. [2022-11-16 20:32:07,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 20:32:07,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:32:07,752 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-16 20:32:07,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 20:32:07,752 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-16 20:32:07,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:32:07,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1921886818, now seen corresponding path program 1 times [2022-11-16 20:32:07,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:32:07,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712444327] [2022-11-16 20:32:07,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:32:07,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:32:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 20:32:07,775 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 20:32:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 20:32:07,787 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-16 20:32:07,787 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 20:32:07,787 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (120 of 121 remaining) [2022-11-16 20:32:07,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (119 of 121 remaining) [2022-11-16 20:32:07,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (118 of 121 remaining) [2022-11-16 20:32:07,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (117 of 121 remaining) [2022-11-16 20:32:07,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (116 of 121 remaining) [2022-11-16 20:32:07,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (115 of 121 remaining) [2022-11-16 20:32:07,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (114 of 121 remaining) [2022-11-16 20:32:07,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (113 of 121 remaining) [2022-11-16 20:32:07,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (112 of 121 remaining) [2022-11-16 20:32:07,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (111 of 121 remaining) [2022-11-16 20:32:07,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (110 of 121 remaining) [2022-11-16 20:32:07,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (109 of 121 remaining) [2022-11-16 20:32:07,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (108 of 121 remaining) [2022-11-16 20:32:07,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (107 of 121 remaining) [2022-11-16 20:32:07,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (106 of 121 remaining) [2022-11-16 20:32:07,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (105 of 121 remaining) [2022-11-16 20:32:07,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (104 of 121 remaining) [2022-11-16 20:32:07,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (103 of 121 remaining) [2022-11-16 20:32:07,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (102 of 121 remaining) [2022-11-16 20:32:07,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (101 of 121 remaining) [2022-11-16 20:32:07,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (100 of 121 remaining) [2022-11-16 20:32:07,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (99 of 121 remaining) [2022-11-16 20:32:07,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (98 of 121 remaining) [2022-11-16 20:32:07,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (97 of 121 remaining) [2022-11-16 20:32:07,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (96 of 121 remaining) [2022-11-16 20:32:07,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (95 of 121 remaining) [2022-11-16 20:32:07,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (94 of 121 remaining) [2022-11-16 20:32:07,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (93 of 121 remaining) [2022-11-16 20:32:07,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (92 of 121 remaining) [2022-11-16 20:32:07,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (91 of 121 remaining) [2022-11-16 20:32:07,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (90 of 121 remaining) [2022-11-16 20:32:07,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 121 remaining) [2022-11-16 20:32:07,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 121 remaining) [2022-11-16 20:32:07,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 121 remaining) [2022-11-16 20:32:07,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 121 remaining) [2022-11-16 20:32:07,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 121 remaining) [2022-11-16 20:32:07,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 121 remaining) [2022-11-16 20:32:07,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 121 remaining) [2022-11-16 20:32:07,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 121 remaining) [2022-11-16 20:32:07,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 121 remaining) [2022-11-16 20:32:07,795 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (80 of 121 remaining) [2022-11-16 20:32:07,795 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 121 remaining) [2022-11-16 20:32:07,795 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 121 remaining) [2022-11-16 20:32:07,795 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 121 remaining) [2022-11-16 20:32:07,795 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 121 remaining) [2022-11-16 20:32:07,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 121 remaining) [2022-11-16 20:32:07,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 121 remaining) [2022-11-16 20:32:07,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 121 remaining) [2022-11-16 20:32:07,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 121 remaining) [2022-11-16 20:32:07,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 121 remaining) [2022-11-16 20:32:07,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 121 remaining) [2022-11-16 20:32:07,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 121 remaining) [2022-11-16 20:32:07,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 121 remaining) [2022-11-16 20:32:07,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 121 remaining) [2022-11-16 20:32:07,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 121 remaining) [2022-11-16 20:32:07,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 121 remaining) [2022-11-16 20:32:07,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 121 remaining) [2022-11-16 20:32:07,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 121 remaining) [2022-11-16 20:32:07,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 121 remaining) [2022-11-16 20:32:07,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 121 remaining) [2022-11-16 20:32:07,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 121 remaining) [2022-11-16 20:32:07,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 121 remaining) [2022-11-16 20:32:07,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 121 remaining) [2022-11-16 20:32:07,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 121 remaining) [2022-11-16 20:32:07,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 121 remaining) [2022-11-16 20:32:07,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (55 of 121 remaining) [2022-11-16 20:32:07,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 121 remaining) [2022-11-16 20:32:07,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 121 remaining) [2022-11-16 20:32:07,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (52 of 121 remaining) [2022-11-16 20:32:07,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 121 remaining) [2022-11-16 20:32:07,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 121 remaining) [2022-11-16 20:32:07,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (49 of 121 remaining) [2022-11-16 20:32:07,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 121 remaining) [2022-11-16 20:32:07,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 121 remaining) [2022-11-16 20:32:07,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 121 remaining) [2022-11-16 20:32:07,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 121 remaining) [2022-11-16 20:32:07,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 121 remaining) [2022-11-16 20:32:07,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 121 remaining) [2022-11-16 20:32:07,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 121 remaining) [2022-11-16 20:32:07,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 121 remaining) [2022-11-16 20:32:07,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 121 remaining) [2022-11-16 20:32:07,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 121 remaining) [2022-11-16 20:32:07,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 121 remaining) [2022-11-16 20:32:07,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 121 remaining) [2022-11-16 20:32:07,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 121 remaining) [2022-11-16 20:32:07,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 121 remaining) [2022-11-16 20:32:07,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 121 remaining) [2022-11-16 20:32:07,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 121 remaining) [2022-11-16 20:32:07,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 121 remaining) [2022-11-16 20:32:07,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 121 remaining) [2022-11-16 20:32:07,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 121 remaining) [2022-11-16 20:32:07,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 121 remaining) [2022-11-16 20:32:07,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 121 remaining) [2022-11-16 20:32:07,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 121 remaining) [2022-11-16 20:32:07,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 121 remaining) [2022-11-16 20:32:07,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 121 remaining) [2022-11-16 20:32:07,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 121 remaining) [2022-11-16 20:32:07,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 121 remaining) [2022-11-16 20:32:07,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 121 remaining) [2022-11-16 20:32:07,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 121 remaining) [2022-11-16 20:32:07,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 121 remaining) [2022-11-16 20:32:07,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 121 remaining) [2022-11-16 20:32:07,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 121 remaining) [2022-11-16 20:32:07,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 121 remaining) [2022-11-16 20:32:07,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (16 of 121 remaining) [2022-11-16 20:32:07,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 121 remaining) [2022-11-16 20:32:07,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 121 remaining) [2022-11-16 20:32:07,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (13 of 121 remaining) [2022-11-16 20:32:07,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 121 remaining) [2022-11-16 20:32:07,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 121 remaining) [2022-11-16 20:32:07,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (10 of 121 remaining) [2022-11-16 20:32:07,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 121 remaining) [2022-11-16 20:32:07,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 121 remaining) [2022-11-16 20:32:07,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 121 remaining) [2022-11-16 20:32:07,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 121 remaining) [2022-11-16 20:32:07,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 121 remaining) [2022-11-16 20:32:07,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 121 remaining) [2022-11-16 20:32:07,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 121 remaining) [2022-11-16 20:32:07,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 121 remaining) [2022-11-16 20:32:07,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 121 remaining) [2022-11-16 20:32:07,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 121 remaining) [2022-11-16 20:32:07,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 20:32:07,810 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:32:07,810 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 20:32:07,810 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-16 20:32:07,903 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 20:32:07,906 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 20:32:07,907 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 399 places, 420 transitions, 861 flow [2022-11-16 20:32:07,907 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 399 places, 420 transitions, 861 flow [2022-11-16 20:32:07,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 399 places, 420 transitions, 861 flow [2022-11-16 20:32:08,050 INFO L130 PetriNetUnfolder]: 31/472 cut-off events. [2022-11-16 20:32:08,050 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-16 20:32:08,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 472 events. 31/472 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1802 event pairs, 0 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 390. Up to 8 conditions per place. [2022-11-16 20:32:08,096 INFO L119 LiptonReduction]: Number of co-enabled transitions 107136 [2022-11-16 20:32:26,055 INFO L134 LiptonReduction]: Checked pairs total: 336876 [2022-11-16 20:32:26,055 INFO L136 LiptonReduction]: Total number of compositions: 441 [2022-11-16 20:32:26,057 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 197 places, 211 transitions, 443 flow