./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/mult-dist.wvr.c --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_e085b0c7-6bf0-4145-89ad-b98e5ee683c4/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e085b0c7-6bf0-4145-89ad-b98e5ee683c4/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_e085b0c7-6bf0-4145-89ad-b98e5ee683c4/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e085b0c7-6bf0-4145-89ad-b98e5ee683c4/bin/utaipan-Xvt2sAort0/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/mult-dist.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e085b0c7-6bf0-4145-89ad-b98e5ee683c4/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_e085b0c7-6bf0-4145-89ad-b98e5ee683c4/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 c22a326532494b0b5126a81d8882f3e958ed0a5a46e6da0f77df1a4da18ba846 --- 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 19:50:27,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:50:27,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:50:27,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:50:27,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:50:27,880 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:50:27,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:50:27,888 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:50:27,890 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:50:27,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:50:27,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:50:27,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:50:27,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:50:27,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:50:27,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:50:27,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:50:27,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:50:27,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:50:27,910 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:50:27,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:50:27,920 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:50:27,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:50:27,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:50:27,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:50:27,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:50:27,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:50:27,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:50:27,928 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:50:27,928 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:50:27,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:50:27,929 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:50:27,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:50:27,931 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:50:27,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:50:27,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:50:27,933 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:50:27,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:50:27,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:50:27,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:50:27,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:50:27,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:50:27,936 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e085b0c7-6bf0-4145-89ad-b98e5ee683c4/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-16 19:50:27,960 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:50:27,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:50:27,961 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:50:27,961 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:50:27,961 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:50:27,962 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:50:27,962 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:50:27,962 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:50:27,962 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:50:27,962 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:50:27,963 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:50:27,963 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:50:27,963 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:50:27,963 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:50:27,963 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:50:27,964 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:50:27,964 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:50:27,964 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:50:27,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 19:50:27,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 19:50:27,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:50:27,965 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:50:27,965 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 19:50:27,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:50:27,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:50:27,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:50:27,966 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 19:50:27,966 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 19:50:27,966 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 19:50:27,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:50:27,967 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 19:50:27,967 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:50:27,967 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:50:27,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:50:27,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:50:27,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:50:27,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:50:27,968 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:50:27,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:50:27,969 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:50:27,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:50:27,969 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:50:27,969 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_e085b0c7-6bf0-4145-89ad-b98e5ee683c4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e085b0c7-6bf0-4145-89ad-b98e5ee683c4/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c22a326532494b0b5126a81d8882f3e958ed0a5a46e6da0f77df1a4da18ba846 [2022-11-16 19:50:28,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:50:28,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:50:28,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:50:28,374 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:50:28,375 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:50:28,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e085b0c7-6bf0-4145-89ad-b98e5ee683c4/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/weaver/mult-dist.wvr.c [2022-11-16 19:50:28,458 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e085b0c7-6bf0-4145-89ad-b98e5ee683c4/bin/utaipan-Xvt2sAort0/data/663250bab/184ffd40cc6148b99d8fdf2b1f4b5e14/FLAG3c799904c [2022-11-16 19:50:29,062 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:50:29,063 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e085b0c7-6bf0-4145-89ad-b98e5ee683c4/sv-benchmarks/c/weaver/mult-dist.wvr.c [2022-11-16 19:50:29,071 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e085b0c7-6bf0-4145-89ad-b98e5ee683c4/bin/utaipan-Xvt2sAort0/data/663250bab/184ffd40cc6148b99d8fdf2b1f4b5e14/FLAG3c799904c [2022-11-16 19:50:29,434 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e085b0c7-6bf0-4145-89ad-b98e5ee683c4/bin/utaipan-Xvt2sAort0/data/663250bab/184ffd40cc6148b99d8fdf2b1f4b5e14 [2022-11-16 19:50:29,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:50:29,438 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:50:29,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:50:29,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:50:29,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:50:29,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:50:29" (1/1) ... [2022-11-16 19:50:29,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@796e1169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:50:29, skipping insertion in model container [2022-11-16 19:50:29,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:50:29" (1/1) ... [2022-11-16 19:50:29,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:50:29,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:50:29,765 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_e085b0c7-6bf0-4145-89ad-b98e5ee683c4/sv-benchmarks/c/weaver/mult-dist.wvr.c[2116,2129] [2022-11-16 19:50:29,769 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:50:29,779 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:50:29,804 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_e085b0c7-6bf0-4145-89ad-b98e5ee683c4/sv-benchmarks/c/weaver/mult-dist.wvr.c[2116,2129] [2022-11-16 19:50:29,806 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:50:29,822 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:50:29,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:50:29 WrapperNode [2022-11-16 19:50:29,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:50:29,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:50:29,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:50:29,825 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:50:29,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:50:29" (1/1) ... [2022-11-16 19:50:29,842 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:50:29" (1/1) ... [2022-11-16 19:50:29,865 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-11-16 19:50:29,865 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:50:29,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:50:29,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:50:29,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:50:29,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:50:29" (1/1) ... [2022-11-16 19:50:29,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:50:29" (1/1) ... [2022-11-16 19:50:29,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:50:29" (1/1) ... [2022-11-16 19:50:29,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:50:29" (1/1) ... [2022-11-16 19:50:29,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:50:29" (1/1) ... [2022-11-16 19:50:29,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:50:29" (1/1) ... [2022-11-16 19:50:29,895 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:50:29" (1/1) ... [2022-11-16 19:50:29,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:50:29" (1/1) ... [2022-11-16 19:50:29,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:50:29,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:50:29,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:50:29,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:50:29,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:50:29" (1/1) ... [2022-11-16 19:50:29,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:50:29,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e085b0c7-6bf0-4145-89ad-b98e5ee683c4/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:50:29,941 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e085b0c7-6bf0-4145-89ad-b98e5ee683c4/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:50:29,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e085b0c7-6bf0-4145-89ad-b98e5ee683c4/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:50:29,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:50:29,998 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 19:50:29,998 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 19:50:29,998 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 19:50:30,002 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 19:50:30,003 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 19:50:30,003 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 19:50:30,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:50:30,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 19:50:30,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 19:50:30,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:50:30,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:50:30,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 19:50:30,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 19:50:30,007 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 19:50:30,194 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:50:30,200 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:50:30,638 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:50:30,655 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:50:30,656 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 19:50:30,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:50:30 BoogieIcfgContainer [2022-11-16 19:50:30,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:50:30,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:50:30,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:50:30,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:50:30,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:50:29" (1/3) ... [2022-11-16 19:50:30,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@416d6e12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:50:30, skipping insertion in model container [2022-11-16 19:50:30,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:50:29" (2/3) ... [2022-11-16 19:50:30,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@416d6e12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:50:30, skipping insertion in model container [2022-11-16 19:50:30,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:50:30" (3/3) ... [2022-11-16 19:50:30,680 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2022-11-16 19:50:30,701 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:50:30,702 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-11-16 19:50:30,704 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 19:50:30,894 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 19:50:30,954 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 19:50:30,972 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 123 transitions, 270 flow [2022-11-16 19:50:30,975 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 123 transitions, 270 flow [2022-11-16 19:50:30,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 123 transitions, 270 flow [2022-11-16 19:50:31,084 INFO L130 PetriNetUnfolder]: 7/120 cut-off events. [2022-11-16 19:50:31,090 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 19:50:31,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 120 events. 7/120 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 112 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 73. Up to 2 conditions per place. [2022-11-16 19:50:31,104 INFO L119 LiptonReduction]: Number of co-enabled transitions 1680 [2022-11-16 19:50:36,087 INFO L134 LiptonReduction]: Checked pairs total: 1870 [2022-11-16 19:50:36,087 INFO L136 LiptonReduction]: Total number of compositions: 117 [2022-11-16 19:50:36,103 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 39 transitions, 102 flow [2022-11-16 19:50:36,145 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 211 states, 197 states have (on average 3.431472081218274) internal successors, (676), 210 states have internal predecessors, (676), 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 19:50:36,168 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:50:36,176 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;@6947158e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:50:36,176 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2022-11-16 19:50:36,180 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 197 states have (on average 3.431472081218274) internal successors, (676), 210 states have internal predecessors, (676), 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 19:50:36,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-16 19:50:36,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:36,188 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-16 19:50:36,188 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 19:50:36,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:36,195 INFO L85 PathProgramCache]: Analyzing trace with hash 458, now seen corresponding path program 1 times [2022-11-16 19:50:36,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:50:36,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937380139] [2022-11-16 19:50:36,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:36,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:50:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:36,323 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 19:50:36,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:50:36,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937380139] [2022-11-16 19:50:36,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937380139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:50:36,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:50:36,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-16 19:50:36,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137741515] [2022-11-16 19:50:36,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:50:36,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 19:50:36,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:50:36,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 19:50:36,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 19:50:36,364 INFO L87 Difference]: Start difference. First operand has 211 states, 197 states have (on average 3.431472081218274) internal successors, (676), 210 states have internal predecessors, (676), 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 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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 19:50:36,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:36,480 INFO L93 Difference]: Finished difference Result 208 states and 673 transitions. [2022-11-16 19:50:36,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 19:50:36,484 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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 1 [2022-11-16 19:50:36,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:36,508 INFO L225 Difference]: With dead ends: 208 [2022-11-16 19:50:36,508 INFO L226 Difference]: Without dead ends: 208 [2022-11-16 19:50:36,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 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 19:50:36,517 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:36,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:50:36,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-16 19:50:36,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-11-16 19:50:36,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 197 states have (on average 3.416243654822335) internal successors, (673), 207 states have internal predecessors, (673), 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 19:50:36,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 673 transitions. [2022-11-16 19:50:36,599 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 673 transitions. Word has length 1 [2022-11-16 19:50:36,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:36,599 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 673 transitions. [2022-11-16 19:50:36,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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 19:50:36,600 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 673 transitions. [2022-11-16 19:50:36,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 19:50:36,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:36,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 19:50:36,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 19:50:36,601 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 19:50:36,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:36,602 INFO L85 PathProgramCache]: Analyzing trace with hash 449070, now seen corresponding path program 1 times [2022-11-16 19:50:36,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:50:36,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317212634] [2022-11-16 19:50:36,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:36,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:50:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:36,950 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 19:50:36,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:50:36,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317212634] [2022-11-16 19:50:36,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317212634] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:50:36,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:50:36,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 19:50:36,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864440926] [2022-11-16 19:50:36,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:50:36,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:50:36,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:50:36,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:50:36,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:50:36,962 INFO L87 Difference]: Start difference. First operand 208 states and 673 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 19:50:37,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:37,039 INFO L93 Difference]: Finished difference Result 196 states and 640 transitions. [2022-11-16 19:50:37,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:50:37,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2022-11-16 19:50:37,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:37,047 INFO L225 Difference]: With dead ends: 196 [2022-11-16 19:50:37,048 INFO L226 Difference]: Without dead ends: 196 [2022-11-16 19:50:37,049 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 19:50:37,051 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:37,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 3 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:50:37,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-16 19:50:37,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-11-16 19:50:37,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 187 states have (on average 3.4224598930481283) internal successors, (640), 195 states have internal predecessors, (640), 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 19:50:37,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 640 transitions. [2022-11-16 19:50:37,083 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 640 transitions. Word has length 3 [2022-11-16 19:50:37,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:37,083 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 640 transitions. [2022-11-16 19:50:37,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 19:50:37,084 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 640 transitions. [2022-11-16 19:50:37,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 19:50:37,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:37,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 19:50:37,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 19:50:37,085 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 19:50:37,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:37,086 INFO L85 PathProgramCache]: Analyzing trace with hash 449072, now seen corresponding path program 1 times [2022-11-16 19:50:37,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:50:37,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685377312] [2022-11-16 19:50:37,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:37,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:50:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:37,306 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 19:50:37,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:50:37,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685377312] [2022-11-16 19:50:37,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685377312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:50:37,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:50:37,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 19:50:37,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186036539] [2022-11-16 19:50:37,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:50:37,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:50:37,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:50:37,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:50:37,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:50:37,309 INFO L87 Difference]: Start difference. First operand 196 states and 640 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 19:50:37,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:37,372 INFO L93 Difference]: Finished difference Result 184 states and 607 transitions. [2022-11-16 19:50:37,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:50:37,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2022-11-16 19:50:37,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:37,377 INFO L225 Difference]: With dead ends: 184 [2022-11-16 19:50:37,377 INFO L226 Difference]: Without dead ends: 184 [2022-11-16 19:50:37,379 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 19:50:37,383 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:37,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 3 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:50:37,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-16 19:50:37,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-11-16 19:50:37,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 177 states have (on average 3.4293785310734464) internal successors, (607), 183 states have internal predecessors, (607), 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 19:50:37,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 607 transitions. [2022-11-16 19:50:37,412 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 607 transitions. Word has length 3 [2022-11-16 19:50:37,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:37,413 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 607 transitions. [2022-11-16 19:50:37,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 19:50:37,414 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 607 transitions. [2022-11-16 19:50:37,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 19:50:37,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:37,415 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 19:50:37,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 19:50:37,415 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 19:50:37,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:37,416 INFO L85 PathProgramCache]: Analyzing trace with hash 431567055, now seen corresponding path program 1 times [2022-11-16 19:50:37,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:50:37,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779067611] [2022-11-16 19:50:37,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:37,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:50:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:37,539 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 19:50:37,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:50:37,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779067611] [2022-11-16 19:50:37,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779067611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:50:37,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:50:37,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 19:50:37,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366452009] [2022-11-16 19:50:37,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:50:37,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:50:37,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:50:37,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:50:37,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:50:37,547 INFO L87 Difference]: Start difference. First operand 184 states and 607 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 19:50:37,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:37,595 INFO L93 Difference]: Finished difference Result 172 states and 574 transitions. [2022-11-16 19:50:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:50:37,595 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 19:50:37,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:37,598 INFO L225 Difference]: With dead ends: 172 [2022-11-16 19:50:37,598 INFO L226 Difference]: Without dead ends: 172 [2022-11-16 19:50:37,599 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 19:50:37,601 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:37,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 3 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:50:37,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-16 19:50:37,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-11-16 19:50:37,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 3.437125748502994) internal successors, (574), 171 states have internal predecessors, (574), 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 19:50:37,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 574 transitions. [2022-11-16 19:50:37,620 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 574 transitions. Word has length 5 [2022-11-16 19:50:37,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:37,623 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 574 transitions. [2022-11-16 19:50:37,624 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 19:50:37,624 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 574 transitions. [2022-11-16 19:50:37,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 19:50:37,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:37,625 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 19:50:37,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 19:50:37,626 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 19:50:37,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:37,628 INFO L85 PathProgramCache]: Analyzing trace with hash 431567054, now seen corresponding path program 1 times [2022-11-16 19:50:37,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:50:37,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209254405] [2022-11-16 19:50:37,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:37,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:50:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:37,793 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 19:50:37,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:50:37,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209254405] [2022-11-16 19:50:37,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209254405] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:50:37,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:50:37,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 19:50:37,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888111962] [2022-11-16 19:50:37,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:50:37,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:50:37,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:50:37,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:50:37,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:50:37,807 INFO L87 Difference]: Start difference. First operand 172 states and 574 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 19:50:37,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:37,855 INFO L93 Difference]: Finished difference Result 160 states and 541 transitions. [2022-11-16 19:50:37,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:50:37,856 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 19:50:37,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:37,858 INFO L225 Difference]: With dead ends: 160 [2022-11-16 19:50:37,858 INFO L226 Difference]: Without dead ends: 160 [2022-11-16 19:50:37,859 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 19:50:37,860 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:37,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 3 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:50:37,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-16 19:50:37,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-11-16 19:50:37,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 157 states have (on average 3.445859872611465) internal successors, (541), 159 states have internal predecessors, (541), 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 19:50:37,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 541 transitions. [2022-11-16 19:50:37,869 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 541 transitions. Word has length 5 [2022-11-16 19:50:37,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:37,869 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 541 transitions. [2022-11-16 19:50:37,869 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 19:50:37,870 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 541 transitions. [2022-11-16 19:50:37,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 19:50:37,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:37,871 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:50:37,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 19:50:37,872 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 19:50:37,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:37,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1875876977, now seen corresponding path program 1 times [2022-11-16 19:50:37,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:50:37,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134682965] [2022-11-16 19:50:37,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:37,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:50:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:37,967 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 19:50:37,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:50:37,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134682965] [2022-11-16 19:50:37,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134682965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:50:37,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:50:37,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 19:50:37,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541339766] [2022-11-16 19:50:37,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:50:37,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:50:37,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:50:37,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:50:37,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:50:37,972 INFO L87 Difference]: Start difference. First operand 160 states and 541 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:38,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:38,023 INFO L93 Difference]: Finished difference Result 133 states and 433 transitions. [2022-11-16 19:50:38,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:50:38,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 19:50:38,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:38,027 INFO L225 Difference]: With dead ends: 133 [2022-11-16 19:50:38,027 INFO L226 Difference]: Without dead ends: 133 [2022-11-16 19:50:38,027 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 19:50:38,031 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:38,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 3 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:50:38,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-16 19:50:38,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-11-16 19:50:38,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 131 states have (on average 3.3053435114503817) internal successors, (433), 132 states have internal predecessors, (433), 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 19:50:38,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 433 transitions. [2022-11-16 19:50:38,041 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 433 transitions. Word has length 7 [2022-11-16 19:50:38,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:38,041 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 433 transitions. [2022-11-16 19:50:38,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:38,042 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 433 transitions. [2022-11-16 19:50:38,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 19:50:38,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:38,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:50:38,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 19:50:38,044 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 19:50:38,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:38,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1875876976, now seen corresponding path program 1 times [2022-11-16 19:50:38,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:50:38,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151650196] [2022-11-16 19:50:38,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:38,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:50:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:38,240 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 19:50:38,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:50:38,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151650196] [2022-11-16 19:50:38,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151650196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:50:38,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:50:38,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:50:38,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416447710] [2022-11-16 19:50:38,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:50:38,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:50:38,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:50:38,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:50:38,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:50:38,244 INFO L87 Difference]: Start difference. First operand 133 states and 433 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:38,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:38,286 INFO L93 Difference]: Finished difference Result 106 states and 325 transitions. [2022-11-16 19:50:38,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:50:38,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 19:50:38,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:38,288 INFO L225 Difference]: With dead ends: 106 [2022-11-16 19:50:38,288 INFO L226 Difference]: Without dead ends: 106 [2022-11-16 19:50:38,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:50:38,289 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:38,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 3 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:50:38,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-16 19:50:38,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-11-16 19:50:38,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 3.0952380952380953) internal successors, (325), 105 states have internal predecessors, (325), 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 19:50:38,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 325 transitions. [2022-11-16 19:50:38,296 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 325 transitions. Word has length 7 [2022-11-16 19:50:38,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:38,296 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 325 transitions. [2022-11-16 19:50:38,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:38,297 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 325 transitions. [2022-11-16 19:50:38,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 19:50:38,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:38,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:50:38,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 19:50:38,306 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 19:50:38,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:38,307 INFO L85 PathProgramCache]: Analyzing trace with hash 974221520, now seen corresponding path program 1 times [2022-11-16 19:50:38,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:50:38,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121007933] [2022-11-16 19:50:38,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:38,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:50:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:38,677 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 19:50:38,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:50:38,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121007933] [2022-11-16 19:50:38,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121007933] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:50:38,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:50:38,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 19:50:38,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984275077] [2022-11-16 19:50:38,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:50:38,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:50:38,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:50:38,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:50:38,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:50:38,685 INFO L87 Difference]: Start difference. First operand 106 states and 325 transitions. Second operand has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 19:50:38,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:38,752 INFO L93 Difference]: Finished difference Result 203 states and 630 transitions. [2022-11-16 19:50:38,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:50:38,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 19 [2022-11-16 19:50:38,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:38,755 INFO L225 Difference]: With dead ends: 203 [2022-11-16 19:50:38,755 INFO L226 Difference]: Without dead ends: 196 [2022-11-16 19:50:38,755 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 19:50:38,757 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:38,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:50:38,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-16 19:50:38,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-11-16 19:50:38,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 3.1384615384615384) internal successors, (612), 195 states have internal predecessors, (612), 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 19:50:38,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 612 transitions. [2022-11-16 19:50:38,767 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 612 transitions. Word has length 19 [2022-11-16 19:50:38,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:38,768 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 612 transitions. [2022-11-16 19:50:38,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 19:50:38,769 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 612 transitions. [2022-11-16 19:50:38,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:50:38,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:38,779 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:50:38,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 19:50:38,780 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 19:50:38,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:38,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1166298434, now seen corresponding path program 1 times [2022-11-16 19:50:38,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:50:38,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898007543] [2022-11-16 19:50:38,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:38,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:50:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:39,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:50:39,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:50:39,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898007543] [2022-11-16 19:50:39,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898007543] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:50:39,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120736638] [2022-11-16 19:50:39,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:39,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:50:39,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e085b0c7-6bf0-4145-89ad-b98e5ee683c4/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:50:39,214 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e085b0c7-6bf0-4145-89ad-b98e5ee683c4/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:50:39,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e085b0c7-6bf0-4145-89ad-b98e5ee683c4/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 19:50:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:39,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 19:50:39,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:50:39,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:50:58,396 WARN L233 SmtUtils]: Spent 17.49s on a formula simplification. DAG size of input: 4829 DAG size of output: 4348 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)