./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9 --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 3a34687129125cc08371e7bb78f7bdb7a4f5274a9b22928fd388f593b6db6995 --- 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-6b4ec56 [2022-11-20 21:23:03,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:23:03,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:23:03,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:23:03,896 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:23:03,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:23:03,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:23:03,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:23:03,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:23:03,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:23:03,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:23:03,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:23:03,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:23:03,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:23:03,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:23:03,919 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:23:03,921 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:23:03,923 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:23:03,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:23:03,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:23:03,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:23:03,940 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:23:03,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:23:03,943 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:23:03,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:23:03,953 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:23:03,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:23:03,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:23:03,956 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:23:03,959 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:23:03,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:23:03,960 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:23:03,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:23:03,965 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:23:03,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:23:03,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:23:03,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:23:03,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:23:03,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:23:03,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:23:03,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:23:03,971 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-20 21:23:04,015 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:23:04,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:23:04,016 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:23:04,017 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:23:04,017 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:23:04,018 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:23:04,018 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:23:04,018 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:23:04,019 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:23:04,019 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:23:04,020 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:23:04,020 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:23:04,020 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:23:04,021 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:23:04,021 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:23:04,021 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:23:04,021 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:23:04,022 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:23:04,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 21:23:04,023 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 21:23:04,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:23:04,023 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:23:04,023 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 21:23:04,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:23:04,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:23:04,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:23:04,024 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 21:23:04,025 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 21:23:04,025 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 21:23:04,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:23:04,026 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 21:23:04,026 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:23:04,026 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:23:04,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:23:04,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:23:04,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:23:04,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:23:04,027 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:23:04,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:23:04,028 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:23:04,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:23:04,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:23:04,029 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_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a34687129125cc08371e7bb78f7bdb7a4f5274a9b22928fd388f593b6db6995 [2022-11-20 21:23:04,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:23:04,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:23:04,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:23:04,382 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:23:04,382 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:23:04,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i [2022-11-20 21:23:07,518 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:23:07,828 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:23:07,829 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i [2022-11-20 21:23:07,841 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/data/35a61c0ee/6564f33633d24dcba31e572b0d631750/FLAGde4c294a2 [2022-11-20 21:23:07,860 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/data/35a61c0ee/6564f33633d24dcba31e572b0d631750 [2022-11-20 21:23:07,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:23:07,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:23:07,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:23:07,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:23:07,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:23:07,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:23:07" (1/1) ... [2022-11-20 21:23:07,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ec836f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:23:07, skipping insertion in model container [2022-11-20 21:23:07,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:23:07" (1/1) ... [2022-11-20 21:23:07,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:23:07,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:23:08,227 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:23:08,238 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:23:08,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:23:08,301 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:23:08,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:23:08 WrapperNode [2022-11-20 21:23:08,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:23:08,302 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:23:08,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:23:08,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:23:08,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:23:08" (1/1) ... [2022-11-20 21:23:08,331 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:23:08" (1/1) ... [2022-11-20 21:23:08,364 INFO L138 Inliner]: procedures = 117, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2022-11-20 21:23:08,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:23:08,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:23:08,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:23:08,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:23:08,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:23:08" (1/1) ... [2022-11-20 21:23:08,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:23:08" (1/1) ... [2022-11-20 21:23:08,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:23:08" (1/1) ... [2022-11-20 21:23:08,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:23:08" (1/1) ... [2022-11-20 21:23:08,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:23:08" (1/1) ... [2022-11-20 21:23:08,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:23:08" (1/1) ... [2022-11-20 21:23:08,392 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:23:08" (1/1) ... [2022-11-20 21:23:08,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:23:08" (1/1) ... [2022-11-20 21:23:08,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:23:08,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:23:08,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:23:08,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:23:08,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:23:08" (1/1) ... [2022-11-20 21:23:08,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:23:08,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:23:08,431 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:23:08,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:23:08,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 21:23:08,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 21:23:08,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 21:23:08,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 21:23:08,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:23:08,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:23:08,601 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:23:08,604 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:23:08,795 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:23:08,916 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:23:08,917 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 21:23:08,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:23:08 BoogieIcfgContainer [2022-11-20 21:23:08,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:23:08,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:23:08,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:23:08,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:23:08,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:23:07" (1/3) ... [2022-11-20 21:23:08,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@284b4e56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:23:08, skipping insertion in model container [2022-11-20 21:23:08,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:23:08" (2/3) ... [2022-11-20 21:23:08,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@284b4e56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:23:08, skipping insertion in model container [2022-11-20 21:23:08,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:23:08" (3/3) ... [2022-11-20 21:23:08,941 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cmemrchr-alloca-2.i [2022-11-20 21:23:08,964 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:23:08,965 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2022-11-20 21:23:09,027 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:23:09,035 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;@38f35bec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:23:09,036 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-20 21:23:09,040 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:23:09,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 21:23:09,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:23:09,048 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 21:23:09,049 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-20 21:23:09,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:23:09,057 INFO L85 PathProgramCache]: Analyzing trace with hash 107409, now seen corresponding path program 1 times [2022-11-20 21:23:09,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:23:09,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016337116] [2022-11-20 21:23:09,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:09,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:23:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:09,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:09,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:23:09,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016337116] [2022-11-20 21:23:09,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016337116] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:23:09,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:23:09,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:23:09,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116525658] [2022-11-20 21:23:09,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:23:09,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:23:09,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:23:09,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:23:09,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:23:09,511 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2022-11-20 21:23:09,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:23:09,583 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2022-11-20 21:23:09,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:23:09,586 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 [2022-11-20 21:23:09,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:23:09,594 INFO L225 Difference]: With dead ends: 16 [2022-11-20 21:23:09,594 INFO L226 Difference]: Without dead ends: 15 [2022-11-20 21:23:09,596 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 [2022-11-20 21:23:09,600 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:23:09,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 10 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:23:09,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-20 21:23:09,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-20 21:23:09,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:23:09,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-20 21:23:09,634 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 3 [2022-11-20 21:23:09,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:23:09,634 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-20 21:23:09,635 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) [2022-11-20 21:23:09,635 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-20 21:23:09,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 21:23:09,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:23:09,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 21:23:09,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 21:23:09,636 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-20 21:23:09,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:23:09,637 INFO L85 PathProgramCache]: Analyzing trace with hash 107410, now seen corresponding path program 1 times [2022-11-20 21:23:09,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:23:09,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075022196] [2022-11-20 21:23:09,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:09,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:23:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:09,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:23:09,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075022196] [2022-11-20 21:23:09,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075022196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:23:09,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:23:09,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:23:09,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873072115] [2022-11-20 21:23:09,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:23:09,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:23:09,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:23:09,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:23:09,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:23:09,946 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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) [2022-11-20 21:23:10,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:23:10,038 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-11-20 21:23:10,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:23:10,039 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 [2022-11-20 21:23:10,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:23:10,070 INFO L225 Difference]: With dead ends: 28 [2022-11-20 21:23:10,070 INFO L226 Difference]: Without dead ends: 28 [2022-11-20 21:23:10,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:23:10,072 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 31 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 [2022-11-20 21:23:10,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 31 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:23:10,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-20 21:23:10,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 17. [2022-11-20 21:23:10,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:23:10,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-20 21:23:10,076 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 3 [2022-11-20 21:23:10,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:23:10,077 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-20 21:23:10,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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) [2022-11-20 21:23:10,077 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-20 21:23:10,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 21:23:10,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:23:10,078 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-11-20 21:23:10,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 21:23:10,082 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-20 21:23:10,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:23:10,088 INFO L85 PathProgramCache]: Analyzing trace with hash 103264033, now seen corresponding path program 1 times [2022-11-20 21:23:10,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:23:10,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582030929] [2022-11-20 21:23:10,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:10,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:23:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:10,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:23:10,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582030929] [2022-11-20 21:23:10,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582030929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:23:10,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605727015] [2022-11-20 21:23:10,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:10,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:23:10,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:23:10,479 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:23:10,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 21:23:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:10,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:23:10,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:23:10,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:23:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:10,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:23:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:11,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605727015] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:23:11,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1610350733] [2022-11-20 21:23:11,090 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-20 21:23:11,090 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:23:11,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:23:11,102 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:23:11,102 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:23:11,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:23:11,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 21:23:11,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:23:11,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:23:11,535 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:23:11,988 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '140#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (not (<= (+ |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~nondetArea~0#1.offset| 1) (select |#length| |ULTIMATE.start_main_~nondetArea~0#1.base|))) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet10#1| 127) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 100000 ~MAX~0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet10#1|)) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~n~0#1| 100000) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-11-20 21:23:11,988 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:23:11,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:23:11,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-20 21:23:11,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33854108] [2022-11-20 21:23:11,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:23:11,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 21:23:11,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:23:11,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 21:23:11,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-11-20 21:23:11,990 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 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) [2022-11-20 21:23:12,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:23:12,151 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2022-11-20 21:23:12,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:23:12,151 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 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 [2022-11-20 21:23:12,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:23:12,152 INFO L225 Difference]: With dead ends: 16 [2022-11-20 21:23:12,152 INFO L226 Difference]: Without dead ends: 16 [2022-11-20 21:23:12,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-11-20 21:23:12,154 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:23:12,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 40 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:23:12,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-20 21:23:12,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-11-20 21:23:12,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.5) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:23:12,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-20 21:23:12,157 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 5 [2022-11-20 21:23:12,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:23:12,157 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-20 21:23:12,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 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) [2022-11-20 21:23:12,158 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-20 21:23:12,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:23:12,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:23:12,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:23:12,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 21:23:12,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-20 21:23:12,364 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-20 21:23:12,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:23:12,365 INFO L85 PathProgramCache]: Analyzing trace with hash 454107511, now seen corresponding path program 1 times [2022-11-20 21:23:12,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:23:12,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359404675] [2022-11-20 21:23:12,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:12,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:23:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:12,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:12,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:23:12,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359404675] [2022-11-20 21:23:12,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359404675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:23:12,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:23:12,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 21:23:12,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443781753] [2022-11-20 21:23:12,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:23:12,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:23:12,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:23:12,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:23:12,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:23:12,506 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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) [2022-11-20 21:23:12,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:23:12,590 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2022-11-20 21:23:12,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:23:12,591 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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 [2022-11-20 21:23:12,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:23:12,592 INFO L225 Difference]: With dead ends: 16 [2022-11-20 21:23:12,592 INFO L226 Difference]: Without dead ends: 16 [2022-11-20 21:23:12,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-20 21:23:12,599 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:23:12,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 17 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:23:12,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-20 21:23:12,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2022-11-20 21:23:12,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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) [2022-11-20 21:23:12,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-11-20 21:23:12,603 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 7 [2022-11-20 21:23:12,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:23:12,603 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-11-20 21:23:12,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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) [2022-11-20 21:23:12,604 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-11-20 21:23:12,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:23:12,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:23:12,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:23:12,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 21:23:12,605 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-20 21:23:12,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:23:12,606 INFO L85 PathProgramCache]: Analyzing trace with hash 454107512, now seen corresponding path program 1 times [2022-11-20 21:23:12,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:23:12,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886579044] [2022-11-20 21:23:12,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:12,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:23:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:13,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:23:13,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886579044] [2022-11-20 21:23:13,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886579044] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:23:13,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633305436] [2022-11-20 21:23:13,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:13,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:23:13,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:23:13,081 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:23:13,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 21:23:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:13,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 21:23:13,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:23:13,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:23:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:13,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:23:13,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:13,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633305436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:23:13,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2036257541] [2022-11-20 21:23:13,771 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 21:23:13,771 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:23:13,771 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:23:13,772 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:23:13,772 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:23:13,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:23:13,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:23:13,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:23:13,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:23:14,100 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:23:15,421 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '272#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_cmemrchr_~n#1| |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (= |ULTIMATE.start_cmemrchr_~c#1| |ULTIMATE.start_cmemrchr_#in~c#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (= |ULTIMATE.start_cmemrchr_~cp~0#1.offset| |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|) (= |ULTIMATE.start_cmemrchr_~cp~0#1.base| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (<= |#NULL.offset| 0) (= |ULTIMATE.start_cmemrchr_#t~pre3#1.base| |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 100000 ~MAX~0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_cmemrchr_#in~n#1|) (= |ULTIMATE.start_main_~nondetArea~0#1.offset| |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (= |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_cmemrchr_#in~c#1|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_cmemrchr_#in~s#1.base| |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|)) (= |ULTIMATE.start_cmemrchr_~s#1.offset| |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= (+ (ite (<= (mod |ULTIMATE.start_cmemrchr_~n#1| 4294967296) 2147483647) (mod |ULTIMATE.start_cmemrchr_~n#1| 4294967296) (+ (- 4294967296) (mod |ULTIMATE.start_cmemrchr_~n#1| 4294967296))) |ULTIMATE.start_cmemrchr_~s#1.offset|) (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1)) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_cmemrchr_#in~s#1.base| |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~n~0#1| 100000) (<= ~MAX~0 100000) (= |#NULL.base| 0) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|))))' at error location [2022-11-20 21:23:15,421 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:23:15,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:23:15,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2022-11-20 21:23:15,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534501459] [2022-11-20 21:23:15,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:23:15,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 21:23:15,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:23:15,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 21:23:15,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-11-20 21:23:15,424 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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) [2022-11-20 21:23:16,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:23:16,298 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-11-20 21:23:16,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 21:23:16,299 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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 7 [2022-11-20 21:23:16,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:23:16,299 INFO L225 Difference]: With dead ends: 62 [2022-11-20 21:23:16,300 INFO L226 Difference]: Without dead ends: 62 [2022-11-20 21:23:16,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 21:23:16,301 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 140 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:23:16,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 92 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:23:16,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-20 21:23:16,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 24. [2022-11-20 21:23:16,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 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) [2022-11-20 21:23:16,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2022-11-20 21:23:16,306 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 7 [2022-11-20 21:23:16,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:23:16,306 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-11-20 21:23:16,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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) [2022-11-20 21:23:16,307 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2022-11-20 21:23:16,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:23:16,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:23:16,307 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 21:23:16,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 21:23:16,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:23:16,517 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-20 21:23:16,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:23:16,518 INFO L85 PathProgramCache]: Analyzing trace with hash -502521436, now seen corresponding path program 1 times [2022-11-20 21:23:16,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:23:16,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975707374] [2022-11-20 21:23:16,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:16,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:23:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 21:23:16,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:23:16,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975707374] [2022-11-20 21:23:16,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975707374] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:23:16,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:23:16,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:23:16,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607330552] [2022-11-20 21:23:16,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:23:16,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:23:16,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:23:16,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:23:16,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:23:16,593 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:23:16,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:23:16,607 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2022-11-20 21:23:16,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:23:16,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 21:23:16,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:23:16,609 INFO L225 Difference]: With dead ends: 23 [2022-11-20 21:23:16,609 INFO L226 Difference]: Without dead ends: 20 [2022-11-20 21:23:16,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:23:16,610 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:23:16,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 18 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:23:16,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-20 21:23:16,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-11-20 21:23:16,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:23:16,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-20 21:23:16,614 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 10 [2022-11-20 21:23:16,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:23:16,614 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-20 21:23:16,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:23:16,615 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-20 21:23:16,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:23:16,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:23:16,615 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:23:16,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 21:23:16,616 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-20 21:23:16,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:23:16,616 INFO L85 PathProgramCache]: Analyzing trace with hash 37291176, now seen corresponding path program 1 times [2022-11-20 21:23:16,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:23:16,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435071684] [2022-11-20 21:23:16,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:16,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:23:16,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:16,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:23:16,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435071684] [2022-11-20 21:23:16,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435071684] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:23:16,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71753497] [2022-11-20 21:23:16,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:16,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:23:16,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:23:16,749 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:23:16,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 21:23:16,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:16,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 21:23:16,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:23:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:16,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:23:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:16,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71753497] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:23:16,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [47567410] [2022-11-20 21:23:16,999 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 21:23:16,999 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:23:16,999 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:23:17,000 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:23:17,000 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:23:17,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:23:17,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 21:23:17,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:23:17,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:23:17,524 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:23:19,135 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '507#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-20 21:23:19,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:23:19,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:23:19,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-11-20 21:23:19,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238722105] [2022-11-20 21:23:19,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:23:19,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 21:23:19,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:23:19,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 21:23:19,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-11-20 21:23:19,137 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:23:19,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:23:19,239 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-11-20 21:23:19,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:23:19,240 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 21:23:19,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:23:19,241 INFO L225 Difference]: With dead ends: 24 [2022-11-20 21:23:19,241 INFO L226 Difference]: Without dead ends: 19 [2022-11-20 21:23:19,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-11-20 21:23:19,242 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:23:19,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 39 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:23:19,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-20 21:23:19,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-20 21:23:19,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:23:19,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-11-20 21:23:19,246 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2022-11-20 21:23:19,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:23:19,246 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-11-20 21:23:19,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:23:19,246 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-11-20 21:23:19,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:23:19,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:23:19,247 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-20 21:23:19,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 21:23:19,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:23:19,459 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-20 21:23:19,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:23:19,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1191886437, now seen corresponding path program 2 times [2022-11-20 21:23:19,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:23:19,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393334977] [2022-11-20 21:23:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:19,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:23:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:19,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:23:19,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393334977] [2022-11-20 21:23:19,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393334977] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:23:19,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363429487] [2022-11-20 21:23:19,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:23:19,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:23:19,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:23:19,851 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:23:19,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 21:23:19,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 21:23:19,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:23:19,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 21:23:19,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:23:19,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:23:20,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 21:23:20,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:23:20,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363429487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:23:20,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:23:20,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 13 [2022-11-20 21:23:20,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315014266] [2022-11-20 21:23:20,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:23:20,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:23:20,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:23:20,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:23:20,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-11-20 21:23:20,468 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2022-11-20 21:23:20,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:23:20,711 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2022-11-20 21:23:20,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:23:20,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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 13 [2022-11-20 21:23:20,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:23:20,713 INFO L225 Difference]: With dead ends: 22 [2022-11-20 21:23:20,713 INFO L226 Difference]: Without dead ends: 22 [2022-11-20 21:23:20,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-20 21:23:20,715 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 14 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:23:20,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 5 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:23:20,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-20 21:23:20,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2022-11-20 21:23:20,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2022-11-20 21:23:20,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-11-20 21:23:20,718 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 13 [2022-11-20 21:23:20,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:23:20,718 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-11-20 21:23:20,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2022-11-20 21:23:20,719 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-11-20 21:23:20,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:23:20,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:23:20,719 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:23:20,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 21:23:20,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:23:20,925 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-20 21:23:20,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:23:20,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1163792695, now seen corresponding path program 2 times [2022-11-20 21:23:20,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:23:20,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581492209] [2022-11-20 21:23:20,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:20,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:23:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:21,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:23:21,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581492209] [2022-11-20 21:23:21,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581492209] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:23:21,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089342443] [2022-11-20 21:23:21,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:23:21,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:23:21,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:23:21,427 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:23:21,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 21:23:21,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 21:23:21,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:23:21,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-20 21:23:21,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:23:21,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:23:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:23:22,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:23:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:23:23,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089342443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:23:23,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [374744793] [2022-11-20 21:23:23,447 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 21:23:23,447 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:23:23,447 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:23:23,447 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:23:23,448 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:23:23,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:23:23,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:23:23,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:23:23,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:23:23,939 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:23:25,893 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '759#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-20 21:23:25,893 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:23:25,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:23:25,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-11-20 21:23:25,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549015886] [2022-11-20 21:23:25,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:23:25,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 21:23:25,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:23:25,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 21:23:25,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1381, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 21:23:25,896 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 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) [2022-11-20 21:23:29,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:23:29,566 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2022-11-20 21:23:29,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 21:23:29,566 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 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 13 [2022-11-20 21:23:29,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:23:29,567 INFO L225 Difference]: With dead ends: 41 [2022-11-20 21:23:29,567 INFO L226 Difference]: Without dead ends: 41 [2022-11-20 21:23:29,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=561, Invalid=3729, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 21:23:29,569 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 179 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:23:29,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 2 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 21:23:29,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-20 21:23:29,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2022-11-20 21:23:29,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:23:29,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-11-20 21:23:29,572 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 13 [2022-11-20 21:23:29,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:23:29,573 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-11-20 21:23:29,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 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) [2022-11-20 21:23:29,573 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-11-20 21:23:29,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 21:23:29,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:23:29,574 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-20 21:23:29,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-20 21:23:29,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:23:29,779 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-20 21:23:29,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:23:29,780 INFO L85 PathProgramCache]: Analyzing trace with hash 542675095, now seen corresponding path program 3 times [2022-11-20 21:23:29,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:23:29,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012928757] [2022-11-20 21:23:29,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:29,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:23:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:29,958 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:23:29,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:23:29,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012928757] [2022-11-20 21:23:29,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012928757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:23:29,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408359670] [2022-11-20 21:23:29,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:23:29,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:23:29,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:23:29,963 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:23:29,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 21:23:30,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:23:30,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:23:30,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-20 21:23:30,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:23:30,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:23:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:30,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:23:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:31,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408359670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:23:31,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [714739734] [2022-11-20 21:23:31,617 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 21:23:31,617 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:23:31,618 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:23:31,618 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:23:31,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:23:31,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:23:31,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 21:23:31,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:23:31,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:23:32,095 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:23:33,990 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1031#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-20 21:23:33,990 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:23:33,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:23:33,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 11] total 28 [2022-11-20 21:23:33,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908305740] [2022-11-20 21:23:33,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:23:33,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 21:23:33,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:23:33,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 21:23:33,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 21:23:33,993 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:23:37,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:23:37,581 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2022-11-20 21:23:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 21:23:37,581 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 21:23:37,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:23:37,582 INFO L225 Difference]: With dead ends: 57 [2022-11-20 21:23:37,582 INFO L226 Difference]: Without dead ends: 48 [2022-11-20 21:23:37,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=431, Invalid=3109, Unknown=0, NotChecked=0, Total=3540 [2022-11-20 21:23:37,584 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 111 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:23:37,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 50 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:23:37,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-20 21:23:37,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2022-11-20 21:23:37,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 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) [2022-11-20 21:23:37,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-11-20 21:23:37,588 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 21 [2022-11-20 21:23:37,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:23:37,589 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-11-20 21:23:37,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:23:37,589 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-11-20 21:23:37,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 21:23:37,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:23:37,590 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-11-20 21:23:37,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 21:23:37,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 21:23:37,796 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-20 21:23:37,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:23:37,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1566471782, now seen corresponding path program 4 times [2022-11-20 21:23:37,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:23:37,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386733227] [2022-11-20 21:23:37,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:37,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:23:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:38,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:23:38,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386733227] [2022-11-20 21:23:38,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386733227] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:23:38,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546396781] [2022-11-20 21:23:38,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 21:23:38,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:23:38,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:23:38,047 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:23:38,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 21:23:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:38,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:23:38,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:23:38,280 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:38,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:23:38,538 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:38,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546396781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:23:38,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [756486424] [2022-11-20 21:23:38,540 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 21:23:38,540 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:23:38,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:23:38,540 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:23:38,541 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:23:38,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:23:38,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 21:23:38,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:23:38,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:23:38,959 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:23:40,459 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1330#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-20 21:23:40,459 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:23:40,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:23:40,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-20 21:23:40,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90398412] [2022-11-20 21:23:40,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:23:40,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 21:23:40,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:23:40,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 21:23:40,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2022-11-20 21:23:40,462 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:23:40,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:23:40,757 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2022-11-20 21:23:40,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 21:23:40,757 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-20 21:23:40,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:23:40,757 INFO L225 Difference]: With dead ends: 46 [2022-11-20 21:23:40,758 INFO L226 Difference]: Without dead ends: 33 [2022-11-20 21:23:40,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 21:23:40,759 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:23:40,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 128 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:23:40,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-20 21:23:40,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-20 21:23:40,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:23:40,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-11-20 21:23:40,762 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 23 [2022-11-20 21:23:40,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:23:40,763 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-11-20 21:23:40,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:23:40,763 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-11-20 21:23:40,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 21:23:40,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:23:40,764 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 1, 1, 1, 1] [2022-11-20 21:23:40,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 21:23:40,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 21:23:40,970 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-20 21:23:40,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:23:40,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1232243396, now seen corresponding path program 5 times [2022-11-20 21:23:40,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:23:40,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691566984] [2022-11-20 21:23:40,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:40,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:23:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:41,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:23:41,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691566984] [2022-11-20 21:23:41,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691566984] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:23:41,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38990483] [2022-11-20 21:23:41,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:23:41,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:23:41,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:23:41,771 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:23:41,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 21:23:42,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 21:23:42,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:23:42,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-20 21:23:42,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:23:42,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:23:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 21:23:43,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:23:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 21:23:45,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38990483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:23:45,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [843419621] [2022-11-20 21:23:45,740 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 21:23:45,740 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:23:45,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:23:45,741 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:23:45,741 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:23:45,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:23:45,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 21:23:45,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:23:45,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:23:46,133 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:23:48,268 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1637#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-20 21:23:48,268 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:23:48,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:23:48,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 50 [2022-11-20 21:23:48,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907501722] [2022-11-20 21:23:48,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:23:48,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 21:23:48,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:23:48,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 21:23:48,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=3221, Unknown=0, NotChecked=0, Total=3540 [2022-11-20 21:23:48,271 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 52 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 51 states have internal predecessors, (75), 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) [2022-11-20 21:23:59,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:23:59,154 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2022-11-20 21:23:59,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-20 21:23:59,155 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 51 states have internal predecessors, (75), 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 27 [2022-11-20 21:23:59,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:23:59,156 INFO L225 Difference]: With dead ends: 111 [2022-11-20 21:23:59,156 INFO L226 Difference]: Without dead ends: 111 [2022-11-20 21:23:59,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3759 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=1809, Invalid=15221, Unknown=0, NotChecked=0, Total=17030 [2022-11-20 21:23:59,163 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 300 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:23:59,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 71 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 21:23:59,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-20 21:23:59,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 42. [2022-11-20 21:23:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 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) [2022-11-20 21:23:59,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-11-20 21:23:59,167 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 27 [2022-11-20 21:23:59,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:23:59,168 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-11-20 21:23:59,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 51 states have internal predecessors, (75), 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) [2022-11-20 21:23:59,168 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-11-20 21:23:59,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 21:23:59,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:23:59,169 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 4, 4, 1, 1, 1, 1] [2022-11-20 21:23:59,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 21:23:59,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:23:59,371 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-20 21:23:59,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:23:59,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1976534837, now seen corresponding path program 6 times [2022-11-20 21:23:59,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:23:59,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359171099] [2022-11-20 21:23:59,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:59,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:23:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 56 proven. 40 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 21:23:59,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:23:59,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359171099] [2022-11-20 21:23:59,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359171099] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:23:59,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221204631] [2022-11-20 21:23:59,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:23:59,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:23:59,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:23:59,837 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:23:59,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 21:23:59,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:23:59,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:23:59,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-20 21:23:59,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:23:59,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:24:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 44 proven. 66 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 21:24:01,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:24:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:02,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221204631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:24:02,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [7214588] [2022-11-20 21:24:02,806 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 21:24:02,806 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:24:02,806 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:24:02,806 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:24:02,806 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:24:02,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:24:02,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 21:24:02,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:24:02,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:24:03,190 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:24:05,131 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2225#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-20 21:24:05,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:24:05,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:24:05,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 18] total 44 [2022-11-20 21:24:05,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9848185] [2022-11-20 21:24:05,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:24:05,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 21:24:05,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:24:05,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 21:24:05,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2533, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 21:24:05,134 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 45 states, 45 states have (on average 2.3555555555555556) internal successors, (106), 44 states have internal predecessors, (106), 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) [2022-11-20 21:24:13,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:24:13,122 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2022-11-20 21:24:13,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 21:24:13,122 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.3555555555555556) internal successors, (106), 44 states have internal predecessors, (106), 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 41 [2022-11-20 21:24:13,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:24:13,123 INFO L225 Difference]: With dead ends: 105 [2022-11-20 21:24:13,123 INFO L226 Difference]: Without dead ends: 88 [2022-11-20 21:24:13,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1747 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=983, Invalid=7389, Unknown=0, NotChecked=0, Total=8372 [2022-11-20 21:24:13,126 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 171 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:24:13,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 119 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 21:24:13,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-20 21:24:13,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 57. [2022-11-20 21:24:13,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 56 states have internal predecessors, (62), 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) [2022-11-20 21:24:13,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2022-11-20 21:24:13,130 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 41 [2022-11-20 21:24:13,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:24:13,131 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2022-11-20 21:24:13,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.3555555555555556) internal successors, (106), 44 states have internal predecessors, (106), 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) [2022-11-20 21:24:13,131 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2022-11-20 21:24:13,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 21:24:13,132 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:24:13,132 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1] [2022-11-20 21:24:13,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 21:24:13,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:13,335 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-20 21:24:13,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:24:13,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1358190366, now seen corresponding path program 7 times [2022-11-20 21:24:13,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:24:13,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514017806] [2022-11-20 21:24:13,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:13,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:24:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:13,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:24:13,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514017806] [2022-11-20 21:24:13,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514017806] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:24:13,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528188237] [2022-11-20 21:24:13,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 21:24:13,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:13,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:24:13,891 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:24:13,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 21:24:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:14,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 21:24:14,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:24:14,214 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:14,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:24:14,885 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:14,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528188237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:24:14,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [931865664] [2022-11-20 21:24:14,887 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 21:24:14,887 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:24:14,887 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:24:14,887 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:24:14,887 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:24:14,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:24:14,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 21:24:15,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:24:15,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:24:15,322 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:24:17,082 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2787#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-20 21:24:17,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:24:17,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:24:17,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 37 [2022-11-20 21:24:17,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931596025] [2022-11-20 21:24:17,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:24:17,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 21:24:17,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:24:17,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 21:24:17,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1940, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 21:24:17,084 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 37 states have internal predecessors, (96), 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) [2022-11-20 21:24:18,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:24:18,019 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2022-11-20 21:24:18,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 21:24:18,020 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 37 states have internal predecessors, (96), 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 47 [2022-11-20 21:24:18,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:24:18,021 INFO L225 Difference]: With dead ends: 158 [2022-11-20 21:24:18,021 INFO L226 Difference]: Without dead ends: 129 [2022-11-20 21:24:18,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=217, Invalid=3323, Unknown=0, NotChecked=0, Total=3540 [2022-11-20 21:24:18,023 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 90 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:24:18,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 685 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:24:18,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-20 21:24:18,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 57. [2022-11-20 21:24:18,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 56 states have internal predecessors, (61), 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) [2022-11-20 21:24:18,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-11-20 21:24:18,028 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 47 [2022-11-20 21:24:18,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:24:18,028 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-11-20 21:24:18,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 37 states have internal predecessors, (96), 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) [2022-11-20 21:24:18,028 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-11-20 21:24:18,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 21:24:18,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:24:18,030 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 5, 5, 1, 1, 1, 1] [2022-11-20 21:24:18,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 21:24:18,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 21:24:18,236 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-20 21:24:18,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:24:18,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1033465012, now seen corresponding path program 8 times [2022-11-20 21:24:18,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:24:18,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347025762] [2022-11-20 21:24:18,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:18,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:24:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 70 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 21:24:18,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:24:18,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347025762] [2022-11-20 21:24:18,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347025762] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:24:18,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629472849] [2022-11-20 21:24:18,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:24:18,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:18,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:24:18,636 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:24:18,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 21:24:19,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-20 21:24:19,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:24:19,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 21:24:19,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:24:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 121 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:19,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:24:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 121 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:20,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629472849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:24:20,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [173159783] [2022-11-20 21:24:20,571 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 21:24:20,572 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:24:20,572 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:24:20,572 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:24:20,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:24:20,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:24:20,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:24:20,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:24:20,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:24:20,930 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:24:22,631 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3357#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-20 21:24:22,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:24:22,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:24:22,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 18] total 42 [2022-11-20 21:24:22,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736234872] [2022-11-20 21:24:22,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:24:22,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 21:24:22,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:24:22,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 21:24:22,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2328, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 21:24:22,635 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 43 states, 43 states have (on average 2.4186046511627906) internal successors, (104), 42 states have internal predecessors, (104), 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) [2022-11-20 21:24:24,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:24:24,363 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2022-11-20 21:24:24,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 21:24:24,364 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.4186046511627906) internal successors, (104), 42 states have internal predecessors, (104), 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 47 [2022-11-20 21:24:24,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:24:24,365 INFO L225 Difference]: With dead ends: 109 [2022-11-20 21:24:24,365 INFO L226 Difference]: Without dead ends: 57 [2022-11-20 21:24:24,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 98 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=735, Invalid=4965, Unknown=0, NotChecked=0, Total=5700 [2022-11-20 21:24:24,367 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 142 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:24:24,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 269 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:24:24,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-20 21:24:24,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-20 21:24:24,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:24:24,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2022-11-20 21:24:24,372 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 47 [2022-11-20 21:24:24,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:24:24,372 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2022-11-20 21:24:24,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.4186046511627906) internal successors, (104), 42 states have internal predecessors, (104), 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) [2022-11-20 21:24:24,373 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2022-11-20 21:24:24,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 21:24:24,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:24:24,374 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 7, 7, 7, 1, 1, 1, 1] [2022-11-20 21:24:24,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 21:24:24,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 21:24:24,580 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-20 21:24:24,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:24:24,580 INFO L85 PathProgramCache]: Analyzing trace with hash -287308992, now seen corresponding path program 9 times [2022-11-20 21:24:24,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:24:24,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085930083] [2022-11-20 21:24:24,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:24,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:24:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:26,106 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:26,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:24:26,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085930083] [2022-11-20 21:24:26,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085930083] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:24:26,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107043480] [2022-11-20 21:24:26,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:24:26,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:26,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:24:26,108 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:24:26,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 21:24:26,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:24:26,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:24:26,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-20 21:24:26,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:24:26,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:24:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:24:27,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:24:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 80 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:24:30,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107043480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:24:30,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [535950286] [2022-11-20 21:24:30,606 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 21:24:30,607 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:24:30,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:24:30,607 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:24:30,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:24:30,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:24:30,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:24:30,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:24:30,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:24:30,959 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:24:33,242 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3940#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-20 21:24:33,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:24:33,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:24:33,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 20] total 57 [2022-11-20 21:24:33,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476665916] [2022-11-20 21:24:33,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:24:33,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-20 21:24:33,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:24:33,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-20 21:24:33,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=4108, Unknown=0, NotChecked=0, Total=4422 [2022-11-20 21:24:33,245 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 59 states, 58 states have (on average 2.413793103448276) internal successors, (140), 58 states have internal predecessors, (140), 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) [2022-11-20 21:24:42,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:24:42,712 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2022-11-20 21:24:42,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-20 21:24:42,715 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 2.413793103448276) internal successors, (140), 58 states have internal predecessors, (140), 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 51 [2022-11-20 21:24:42,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:24:42,716 INFO L225 Difference]: With dead ends: 137 [2022-11-20 21:24:42,716 INFO L226 Difference]: Without dead ends: 137 [2022-11-20 21:24:42,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2709 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=1685, Invalid=14571, Unknown=0, NotChecked=0, Total=16256 [2022-11-20 21:24:42,718 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 624 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 2230 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 2313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:24:42,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 440 Invalid, 2313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2230 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-20 21:24:42,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-20 21:24:42,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 63. [2022-11-20 21:24:42,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 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) [2022-11-20 21:24:42,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-11-20 21:24:42,723 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 51 [2022-11-20 21:24:42,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:24:42,723 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-11-20 21:24:42,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 2.413793103448276) internal successors, (140), 58 states have internal predecessors, (140), 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) [2022-11-20 21:24:42,724 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-11-20 21:24:42,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 21:24:42,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:24:42,725 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1] [2022-11-20 21:24:42,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-20 21:24:42,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 21:24:42,931 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-20 21:24:42,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:24:42,931 INFO L85 PathProgramCache]: Analyzing trace with hash 118413473, now seen corresponding path program 10 times [2022-11-20 21:24:42,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:24:42,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834359160] [2022-11-20 21:24:42,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:42,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:24:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 16 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:43,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:24:43,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834359160] [2022-11-20 21:24:43,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834359160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:24:43,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942665817] [2022-11-20 21:24:43,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 21:24:43,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:43,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:24:43,597 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:24:43,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 21:24:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:43,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-20 21:24:43,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:24:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 16 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:44,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:24:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 16 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:44,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942665817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:24:44,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1867280361] [2022-11-20 21:24:44,866 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 21:24:44,866 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:24:44,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:24:44,867 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:24:44,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:24:44,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:24:44,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:24:44,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:24:44,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:24:45,211 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:24:46,984 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4624#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-20 21:24:46,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:24:46,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:24:46,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 41 [2022-11-20 21:24:46,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910914700] [2022-11-20 21:24:46,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:24:46,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-20 21:24:46,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:24:46,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-20 21:24:46,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2310, Unknown=0, NotChecked=0, Total=2450 [2022-11-20 21:24:46,986 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 42 states, 42 states have (on average 2.5714285714285716) internal successors, (108), 41 states have internal predecessors, (108), 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) [2022-11-20 21:24:48,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:24:48,091 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2022-11-20 21:24:48,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 21:24:48,092 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.5714285714285716) internal successors, (108), 41 states have internal predecessors, (108), 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 53 [2022-11-20 21:24:48,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:24:48,092 INFO L225 Difference]: With dead ends: 96 [2022-11-20 21:24:48,092 INFO L226 Difference]: Without dead ends: 63 [2022-11-20 21:24:48,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=239, Invalid=4051, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 21:24:48,094 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 103 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:24:48,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 743 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 21:24:48,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-20 21:24:48,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-20 21:24:48,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:24:48,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2022-11-20 21:24:48,098 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 53 [2022-11-20 21:24:48,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:24:48,098 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2022-11-20 21:24:48,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.5714285714285716) internal successors, (108), 41 states have internal predecessors, (108), 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) [2022-11-20 21:24:48,099 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2022-11-20 21:24:48,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-20 21:24:48,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:24:48,100 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 1, 1, 1, 1] [2022-11-20 21:24:48,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-20 21:24:48,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 21:24:48,305 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-20 21:24:48,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:24:48,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1967223935, now seen corresponding path program 11 times [2022-11-20 21:24:48,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:24:48,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901576484] [2022-11-20 21:24:48,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:48,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:24:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:49,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:24:49,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901576484] [2022-11-20 21:24:49,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901576484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:24:49,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731350898] [2022-11-20 21:24:49,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:24:49,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:49,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:24:49,851 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:24:49,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 21:24:50,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-20 21:24:50,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:24:50,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-20 21:24:50,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:24:50,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:24:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 28 proven. 128 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-20 21:24:54,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:24:59,581 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-20 21:24:59,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731350898] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:24:59,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1318898650] [2022-11-20 21:24:59,582 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 21:24:59,582 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:24:59,583 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:24:59,583 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:24:59,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:24:59,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:24:59,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:24:59,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:24:59,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:24:59,942 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:25:02,786 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5239#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-20 21:25:02,786 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:25:02,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:25:02,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 78 [2022-11-20 21:25:02,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847698484] [2022-11-20 21:25:02,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:25:02,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-20 21:25:02,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:25:02,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-20 21:25:02,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=7056, Unknown=0, NotChecked=0, Total=7656 [2022-11-20 21:25:02,790 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 80 states, 79 states have (on average 1.7848101265822784) internal successors, (141), 79 states have internal predecessors, (141), 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) [2022-11-20 21:25:57,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:25:57,201 INFO L93 Difference]: Finished difference Result 241 states and 244 transitions. [2022-11-20 21:25:57,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-11-20 21:25:57,201 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.7848101265822784) internal successors, (141), 79 states have internal predecessors, (141), 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 57 [2022-11-20 21:25:57,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:25:57,202 INFO L225 Difference]: With dead ends: 241 [2022-11-20 21:25:57,202 INFO L226 Difference]: Without dead ends: 241 [2022-11-20 21:25:57,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16954 ImplicationChecksByTransitivity, 59.4s TimeCoverageRelationStatistics Valid=5980, Invalid=60842, Unknown=0, NotChecked=0, Total=66822 [2022-11-20 21:25:57,209 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1321 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 3565 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1321 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 3870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 3565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:25:57,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1321 Valid, 312 Invalid, 3870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 3565 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-20 21:25:57,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-20 21:25:57,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 92. [2022-11-20 21:25:57,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 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) [2022-11-20 21:25:57,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2022-11-20 21:25:57,221 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 57 [2022-11-20 21:25:57,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:25:57,221 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2022-11-20 21:25:57,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 1.7848101265822784) internal successors, (141), 79 states have internal predecessors, (141), 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) [2022-11-20 21:25:57,222 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2022-11-20 21:25:57,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-20 21:25:57,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:57,223 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 9, 9, 1, 1, 1, 1] [2022-11-20 21:25:57,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-20 21:25:57,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 21:25:57,430 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-20 21:25:57,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:57,430 INFO L85 PathProgramCache]: Analyzing trace with hash 135676704, now seen corresponding path program 12 times [2022-11-20 21:25:57,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:25:57,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815465253] [2022-11-20 21:25:57,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:57,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:25:57,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:58,277 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 306 proven. 225 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-20 21:25:58,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:25:58,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815465253] [2022-11-20 21:25:58,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815465253] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:25:58,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577926395] [2022-11-20 21:25:58,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:25:58,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:58,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:25:58,279 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:25:58,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 21:25:58,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:25:58,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:25:58,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-20 21:25:58,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:58,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:25:59,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:25:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 531 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:25:59,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:26:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 546 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:26:01,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577926395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:26:01,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1715251831] [2022-11-20 21:26:01,326 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 21:26:01,326 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:26:01,326 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:26:01,327 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:26:01,327 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:26:01,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:26:01,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:26:01,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:26:01,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:26:01,697 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:26:04,039 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6538#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-20 21:26:04,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:26:04,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:26:04,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 32, 32] total 75 [2022-11-20 21:26:04,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26579343] [2022-11-20 21:26:04,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:26:04,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-20 21:26:04,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:26:04,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-20 21:26:04,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=585, Invalid=6387, Unknown=0, NotChecked=0, Total=6972 [2022-11-20 21:26:04,043 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 76 states, 76 states have (on average 2.6578947368421053) internal successors, (202), 75 states have internal predecessors, (202), 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) [2022-11-20 21:26:10,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:26:10,159 INFO L93 Difference]: Finished difference Result 212 states and 219 transitions. [2022-11-20 21:26:10,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-20 21:26:10,160 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.6578947368421053) internal successors, (202), 75 states have internal predecessors, (202), 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 91 [2022-11-20 21:26:10,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:26:10,161 INFO L225 Difference]: With dead ends: 212 [2022-11-20 21:26:10,161 INFO L226 Difference]: Without dead ends: 108 [2022-11-20 21:26:10,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 202 SyntacticMatches, 9 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4749 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=2713, Invalid=16747, Unknown=0, NotChecked=0, Total=19460 [2022-11-20 21:26:10,162 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 305 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 1998 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:26:10,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 356 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1998 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 21:26:10,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-20 21:26:10,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-11-20 21:26:10,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 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) [2022-11-20 21:26:10,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2022-11-20 21:26:10,166 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 91 [2022-11-20 21:26:10,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:26:10,167 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2022-11-20 21:26:10,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.6578947368421053) internal successors, (202), 75 states have internal predecessors, (202), 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) [2022-11-20 21:26:10,167 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2022-11-20 21:26:10,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-20 21:26:10,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:26:10,169 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 1, 1, 1, 1] [2022-11-20 21:26:10,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 21:26:10,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:26:10,375 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-20 21:26:10,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:26:10,376 INFO L85 PathProgramCache]: Analyzing trace with hash -386654568, now seen corresponding path program 13 times [2022-11-20 21:26:10,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:26:10,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598291302] [2022-11-20 21:26:10,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:26:10,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:26:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:26:12,198 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 34 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:26:12,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:26:12,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598291302] [2022-11-20 21:26:12,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598291302] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:26:12,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49926124] [2022-11-20 21:26:12,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 21:26:12,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:26:12,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:26:12,200 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:26:12,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 21:26:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:26:12,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-20 21:26:12,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:26:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 34 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:26:12,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:26:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 34 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:26:15,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49926124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:26:15,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1801855069] [2022-11-20 21:26:15,591 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 21:26:15,591 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:26:15,591 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:26:15,591 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:26:15,592 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:26:15,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:26:15,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 21:26:15,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:26:15,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:26:15,953 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:26:18,473 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7691#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-20 21:26:18,473 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:26:18,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:26:18,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 76 [2022-11-20 21:26:18,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002662201] [2022-11-20 21:26:18,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:26:18,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-20 21:26:18,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:26:18,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-20 21:26:18,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=6914, Unknown=0, NotChecked=0, Total=7140 [2022-11-20 21:26:18,476 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 77 states, 77 states have (on average 2.792207792207792) internal successors, (215), 76 states have internal predecessors, (215), 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) [2022-11-20 21:26:22,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:26:22,325 INFO L93 Difference]: Finished difference Result 180 states and 181 transitions. [2022-11-20 21:26:22,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-20 21:26:22,325 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.792207792207792) internal successors, (215), 76 states have internal predecessors, (215), 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 107 [2022-11-20 21:26:22,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:26:22,326 INFO L225 Difference]: With dead ends: 180 [2022-11-20 21:26:22,326 INFO L226 Difference]: Without dead ends: 111 [2022-11-20 21:26:22,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 272 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=432, Invalid=13610, Unknown=0, NotChecked=0, Total=14042 [2022-11-20 21:26:22,328 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 140 mSDsluCounter, 2609 mSDsCounter, 0 mSdLazyCounter, 2967 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 2660 SdHoareTripleChecker+Invalid, 2986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:26:22,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 2660 Invalid, 2986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2967 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-20 21:26:22,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-20 21:26:22,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2022-11-20 21:26:22,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 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) [2022-11-20 21:26:22,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-11-20 21:26:22,331 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 107 [2022-11-20 21:26:22,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:26:22,332 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-11-20 21:26:22,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.792207792207792) internal successors, (215), 76 states have internal predecessors, (215), 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) [2022-11-20 21:26:22,332 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-11-20 21:26:22,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-20 21:26:22,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:26:22,333 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 1, 1, 1, 1] [2022-11-20 21:26:22,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-20 21:26:22,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-20 21:26:22,539 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-20 21:26:22,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:26:22,539 INFO L85 PathProgramCache]: Analyzing trace with hash -304138457, now seen corresponding path program 14 times [2022-11-20 21:26:22,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:26:22,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951094761] [2022-11-20 21:26:22,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:26:22,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:26:22,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:26:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:26:25,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:26:25,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951094761] [2022-11-20 21:26:25,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951094761] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:26:25,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922342215] [2022-11-20 21:26:25,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:26:25,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:26:25,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:26:25,758 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:26:25,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 21:26:28,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-11-20 21:26:28,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:26:28,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 175 conjunts are in the unsatisfiable core [2022-11-20 21:26:28,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:26:28,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:26:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 28 proven. 802 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-20 21:26:38,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:26:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 692 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-20 21:26:51,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922342215] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:26:51,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [995128697] [2022-11-20 21:26:51,770 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 21:26:51,771 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:26:51,771 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:26:51,771 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:26:51,771 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:26:51,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:26:51,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 21:26:51,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:26:51,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:26:52,119 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:26:56,310 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8850#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-20 21:26:56,310 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:26:56,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:26:56,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 53, 47] total 143 [2022-11-20 21:26:56,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097664196] [2022-11-20 21:26:56,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:26:56,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-11-20 21:26:56,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:26:56,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-11-20 21:26:56,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1513, Invalid=21743, Unknown=0, NotChecked=0, Total=23256 [2022-11-20 21:26:56,313 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 145 states, 144 states have (on average 1.9791666666666667) internal successors, (285), 144 states have internal predecessors, (285), 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) [2022-11-20 21:28:46,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:28:46,057 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2022-11-20 21:28:46,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2022-11-20 21:28:46,059 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 144 states have (on average 1.9791666666666667) internal successors, (285), 144 states have internal predecessors, (285), 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 109 [2022-11-20 21:28:46,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:28:46,060 INFO L225 Difference]: With dead ends: 252 [2022-11-20 21:28:46,060 INFO L226 Difference]: Without dead ends: 252 [2022-11-20 21:28:46,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 218 SyntacticMatches, 18 SemanticMatches, 369 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33836 ImplicationChecksByTransitivity, 132.8s TimeCoverageRelationStatistics Valid=10608, Invalid=126662, Unknown=0, NotChecked=0, Total=137270 [2022-11-20 21:28:46,070 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 341 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 2148 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 3571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1319 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:28:46,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 796 Invalid, 3571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2148 Invalid, 0 Unknown, 1319 Unchecked, 1.6s Time] [2022-11-20 21:28:46,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-11-20 21:28:46,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 178. [2022-11-20 21:28:46,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.0112994350282485) internal successors, (179), 177 states have internal predecessors, (179), 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) [2022-11-20 21:28:46,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2022-11-20 21:28:46,075 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 109 [2022-11-20 21:28:46,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:28:46,076 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2022-11-20 21:28:46,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 144 states have (on average 1.9791666666666667) internal successors, (285), 144 states have internal predecessors, (285), 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) [2022-11-20 21:28:46,076 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2022-11-20 21:28:46,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-20 21:28:46,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:28:46,078 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 18, 18, 1, 1, 1, 1] [2022-11-20 21:28:46,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 21:28:46,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 21:28:46,286 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-20 21:28:46,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:28:46,286 INFO L85 PathProgramCache]: Analyzing trace with hash -684251689, now seen corresponding path program 15 times [2022-11-20 21:28:46,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:28:46,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006892529] [2022-11-20 21:28:46,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:28:46,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:28:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:28:49,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2636 backedges. 1188 proven. 936 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2022-11-20 21:28:49,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:28:49,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006892529] [2022-11-20 21:28:49,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006892529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:28:49,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815572367] [2022-11-20 21:28:49,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:28:49,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:28:49,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:28:49,039 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:28:49,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7728fdc2-3cd4-4d2a-9de2-40a1895e43e2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 21:28:50,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:28:50,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:28:50,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 212 conjunts are in the unsatisfiable core [2022-11-20 21:28:50,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:28:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2636 backedges. 134 proven. 2502 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:28:58,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:29:04,206 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:29:04,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-11-20 21:29:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2636 backedges. 0 proven. 2636 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:29:14,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815572367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:29:14,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [980984958] [2022-11-20 21:29:14,972 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 21:29:14,973 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:29:14,973 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:29:14,973 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:29:14,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:29:15,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:29:15,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 21:29:15,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:29:15,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 21:29:15,313 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:29:19,449 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10956#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-20 21:29:19,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:29:19,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:29:19,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 58, 59] total 156 [2022-11-20 21:29:19,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643727277] [2022-11-20 21:29:19,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:29:19,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2022-11-20 21:29:19,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:29:19,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2022-11-20 21:29:19,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1957, Invalid=25103, Unknown=0, NotChecked=0, Total=27060 [2022-11-20 21:29:19,453 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand has 157 states, 157 states have (on average 2.968152866242038) internal successors, (466), 156 states have internal predecessors, (466), 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) [2022-11-20 21:29:25,847 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (* (div (+ (- 4294967287) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse5 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967295)) 4294967296) 4294967296)) (.cse4 (* (div (+ (- 4294967291) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse9 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967288)) 4294967296) 4294967296)) (.cse11 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967283)) 4294967296) 4294967296)) (.cse7 (* (div (+ (- 4294967289) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse16 (* (div (+ (- 4294967281) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse17 (* 4294967296 (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967286)) 4294967296))) (.cse10 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967285)) 4294967296) 4294967296)) (.cse8 (* (div (+ (- 4294967293) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse3 (* (div (+ (- 4294967292) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse12 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967279)) 4294967296) 4294967296)) (.cse15 (* (div (+ (- 4294967290) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse14 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967294)) 4294967296) 4294967296)) (.cse13 (* (div (+ (- 4294967282) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse1 (* (div (+ (- 4294967284) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse2 (< (+ 2147483613 |c_ULTIMATE.start_main_~nondetArea~0#1.offset|) 0)) (.cse0 (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~nondetArea~0#1.offset|)) (.cse18 (* (div (+ (- 4294967278) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296))) (and (or (< .cse0 (+ 4294967318 .cse1)) (< (+ 22 (* (div (+ 12 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) .cse2) (or (< .cse0 (+ .cse3 8589934622)) (< (+ (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 2147483644)) 4294967296) 4294967296) 4294967326) .cse0)) (or (< .cse0 (+ 8589934621 .cse4)) (< (+ (* (div (+ (- 2147483643) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296) 4294967325) .cse0)) (or (< (+ (* (div (+ (- 2147483647) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296) 4294967329) .cse0) (< .cse0 (+ 8589934625 .cse5))) (or (< .cse0 (+ 8589934617 .cse6)) (< (+ (* (div (+ (- 2147483639) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296) 4294967321) .cse0)) (< 17 |c_ULTIMATE.start_main_~n~0#1|) (or (< .cse0 (+ 4294967321 .cse6)) .cse2 (< (+ 25 (* (div (+ 9 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0)) (or (< .cse0 (+ 4294967329 .cse5)) (< (+ (* 4294967296 (div (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296)) 33) .cse0) .cse2) (= 0 |c_ULTIMATE.start_main_~nondetArea~0#1.offset|) (or (< .cse0 (+ .cse7 4294967323)) (< (+ (* 4294967296 (div (+ 7 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) 27) .cse0) .cse2) (or (< (+ (* 4294967296 (div (+ 3 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) 31) .cse0) (< .cse0 (+ 4294967327 .cse8)) .cse2) (or (< (+ 26 (* (div (+ 8 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) (< .cse0 (+ 4294967322 .cse9)) .cse2) (or (< .cse0 (+ .cse4 4294967325)) (< (+ 29 (* (div (+ 5 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) .cse2) (or (< (+ (* 4294967296 (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 2147483637)) 4294967296)) 4294967319) .cse0) (< .cse0 (+ .cse10 8589934615))) (or (< (+ (* (div (+ |c_ULTIMATE.start_main_~i~0#1| 13) 4294967296) 4294967296) 21) .cse0) (< .cse0 (+ .cse11 4294967317)) .cse2) (or (< (+ 4294967322 (* (div (+ (- 2147483640) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) (< .cse0 (+ 8589934618 .cse9))) (or (< .cse0 (+ .cse12 8589934609)) (< (+ 4294967313 (* (div (+ (- 2147483631) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0)) (or (< (+ 20 (* 4294967296 (div (+ 14 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) .cse0) (< .cse0 (+ 4294967316 .cse13)) .cse2) (or (< .cse0 (+ .cse14 8589934624)) (< (+ (* 4294967296 (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 2147483646)) 4294967296)) 4294967328) .cse0)) (or (< (+ (* (div (+ (- 2147483635) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296) 4294967317) .cse0) (< .cse0 (+ .cse11 8589934613))) (or (< (+ (* (div (+ (- 2147483641) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296) 4294967323) .cse0) (< .cse0 (+ 8589934619 .cse7))) (or (< .cse0 (+ .cse15 4294967324)) (< (+ 28 (* (div (+ 6 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) .cse2) (or (< (+ 4294967315 (* (div (+ (- 2147483633) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) (< .cse0 (+ 8589934611 .cse16))) (or (< (+ (* (div (+ |c_ULTIMATE.start_main_~i~0#1| 10) 4294967296) 4294967296) 24) .cse0) (< .cse0 (+ 4294967320 .cse17)) .cse2) (<= |c_ULTIMATE.start_main_~i~0#1| 18) (or (< .cse0 (+ 4294967315 .cse16)) (< (+ 19 (* (div (+ 15 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) .cse2) (or (< (+ (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 2147483630)) 4294967296) 4294967296) 4294967312) .cse0) (< .cse0 (+ 8589934608 .cse18))) (or (< .cse0 (+ 8589934616 .cse17)) (< (+ 4294967320 (* (div (+ (- 2147483638) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0)) (or (< (+ 23 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| 11) 4294967296) 4294967296)) .cse0) .cse2 (< .cse0 (+ .cse10 4294967319))) (or (< .cse0 (+ .cse8 8589934623)) (< (+ 4294967327 (* (div (+ (- 2147483645) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0)) (or (< .cse0 (+ .cse3 4294967326)) .cse2 (< (+ 30 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| 4) 4294967296) 4294967296)) .cse0)) (or (< (+ (* (div (+ |c_ULTIMATE.start_main_~i~0#1| 17) 4294967296) 4294967296) 17) .cse0) (< .cse0 (+ .cse12 4294967313)) .cse2) (or (< (+ (* 4294967296 (div (+ (- 2147483642) |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) 4294967324) .cse0) (< .cse0 (+ 8589934620 .cse15))) (or (< (+ 32 (* 4294967296 (div (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) .cse0) (< .cse0 (+ .cse14 4294967328)) .cse2) (or (< .cse0 (+ 8589934612 .cse13)) (< (+ 4294967316 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 2147483634)) 4294967296) 4294967296)) .cse0)) (or (< .cse0 (+ 8589934614 .cse1)) (< (+ 4294967318 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 2147483636)) 4294967296) 4294967296)) .cse0)) (or (< (+ 16 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| 18) 4294967296) 4294967296)) .cse0) .cse2 (< .cse0 (+ .cse18 4294967312))))) is different from false [2022-11-20 21:29:27,873 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (* (div (+ (- 4294967287) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse4 (* (div (+ (- 4294967291) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse11 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967288)) 4294967296) 4294967296)) (.cse13 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967283)) 4294967296) 4294967296)) (.cse9 (* (div (+ (- 4294967289) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse18 (* (div (+ (- 4294967281) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse19 (* 4294967296 (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967286)) 4294967296))) (.cse12 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967285)) 4294967296) 4294967296)) (.cse10 (* (div (+ (- 4294967293) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse3 (* (div (+ (- 4294967292) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse14 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967279)) 4294967296) 4294967296)) (.cse17 (* (div (+ (- 4294967290) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse16 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967294)) 4294967296) 4294967296)) (.cse15 (* (div (+ (- 4294967282) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse1 (* (div (+ (- 4294967284) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse2 (< (+ 2147483613 |c_ULTIMATE.start_main_~nondetArea~0#1.offset|) 0)) (.cse0 (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~nondetArea~0#1.offset|)) (.cse20 (* (div (+ (- 4294967278) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296))) (and (or (< .cse0 (+ 4294967318 .cse1)) (< (+ 22 (* (div (+ 12 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) .cse2) (or (< .cse0 (+ .cse3 8589934622)) (< (+ (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 2147483644)) 4294967296) 4294967296) 4294967326) .cse0)) (or (< .cse0 (+ 8589934621 .cse4)) (< (+ (* (div (+ (- 2147483643) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296) 4294967325) .cse0)) (or (< .cse0 (+ 8589934617 .cse5)) (< (+ (* (div (+ (- 2147483639) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296) 4294967321) .cse0)) (or (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) |c_ULTIMATE.start_main_~n~0#1|) (let ((.cse8 (mod |c_ULTIMATE.start_main_~n~0#1| 4294967296))) (let ((.cse6 (+ .cse8 |c_ULTIMATE.start_main_~nondetArea~0#1.offset|)) (.cse7 (<= .cse8 2147483647))) (and (or (<= 35 .cse6) (< .cse6 34) (not .cse7)) (or (<= 4294967331 .cse6) (< .cse6 4294967330) .cse7))))) (or (< .cse0 (+ 4294967321 .cse5)) .cse2 (< (+ 25 (* (div (+ 9 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0)) (or (< .cse0 (+ .cse9 4294967323)) (< (+ (* 4294967296 (div (+ 7 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) 27) .cse0) .cse2) (or (< (+ (* 4294967296 (div (+ 3 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) 31) .cse0) (< .cse0 (+ 4294967327 .cse10)) .cse2) (or (< (+ 26 (* (div (+ 8 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) (< .cse0 (+ 4294967322 .cse11)) .cse2) (or (< .cse0 (+ .cse4 4294967325)) (< (+ 29 (* (div (+ 5 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) .cse2) (or (< (+ (* 4294967296 (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 2147483637)) 4294967296)) 4294967319) .cse0) (< .cse0 (+ .cse12 8589934615))) (or (< (+ (* (div (+ |c_ULTIMATE.start_main_~i~0#1| 13) 4294967296) 4294967296) 21) .cse0) (< .cse0 (+ .cse13 4294967317)) .cse2) (or (< (+ 4294967322 (* (div (+ (- 2147483640) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) (< .cse0 (+ 8589934618 .cse11))) (or (< .cse0 (+ .cse14 8589934609)) (< (+ 4294967313 (* (div (+ (- 2147483631) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0)) (or (< (+ 20 (* 4294967296 (div (+ 14 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) .cse0) (< .cse0 (+ 4294967316 .cse15)) .cse2) (or (< .cse0 (+ .cse16 8589934624)) (< (+ (* 4294967296 (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 2147483646)) 4294967296)) 4294967328) .cse0)) (or (< (+ (* (div (+ (- 2147483635) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296) 4294967317) .cse0) (< .cse0 (+ .cse13 8589934613))) (or (< (+ (* (div (+ (- 2147483641) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296) 4294967323) .cse0) (< .cse0 (+ 8589934619 .cse9))) (or (< .cse0 (+ .cse17 4294967324)) (< (+ 28 (* (div (+ 6 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) .cse2) (or (< (+ 4294967315 (* (div (+ (- 2147483633) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) (< .cse0 (+ 8589934611 .cse18))) (or (< (+ (* (div (+ |c_ULTIMATE.start_main_~i~0#1| 10) 4294967296) 4294967296) 24) .cse0) (< .cse0 (+ 4294967320 .cse19)) .cse2) (or (< .cse0 (+ 4294967315 .cse18)) (< (+ 19 (* (div (+ 15 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) .cse2) (or (< (+ (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 2147483630)) 4294967296) 4294967296) 4294967312) .cse0) (< .cse0 (+ 8589934608 .cse20))) (or (< .cse0 (+ 8589934616 .cse19)) (< (+ 4294967320 (* (div (+ (- 2147483638) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0)) (or (< (+ 23 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| 11) 4294967296) 4294967296)) .cse0) .cse2 (< .cse0 (+ .cse12 4294967319))) (or (< .cse0 (+ .cse10 8589934623)) (< (+ 4294967327 (* (div (+ (- 2147483645) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0)) (or (< .cse0 (+ .cse3 4294967326)) .cse2 (< (+ 30 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| 4) 4294967296) 4294967296)) .cse0)) (or (< (+ (* (div (+ |c_ULTIMATE.start_main_~i~0#1| 17) 4294967296) 4294967296) 17) .cse0) (< .cse0 (+ .cse14 4294967313)) .cse2) (or (< (+ (* 4294967296 (div (+ (- 2147483642) |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) 4294967324) .cse0) (< .cse0 (+ 8589934620 .cse17))) (or (< (+ 32 (* 4294967296 (div (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) .cse0) (< .cse0 (+ .cse16 4294967328)) .cse2) (or (< .cse0 (+ 8589934612 .cse15)) (< (+ 4294967316 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 2147483634)) 4294967296) 4294967296)) .cse0)) (or (< .cse0 (+ 8589934614 .cse1)) (< (+ 4294967318 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 2147483636)) 4294967296) 4294967296)) .cse0)) (or (< (+ 16 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| 18) 4294967296) 4294967296)) .cse0) .cse2 (< .cse0 (+ .cse20 4294967312))))) is different from false [2022-11-20 21:29:29,894 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (* (div (+ (- 4294967287) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse5 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967295)) 4294967296) 4294967296)) (.cse4 (* (div (+ (- 4294967291) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse10 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967288)) 4294967296) 4294967296)) (.cse9 (* (div (+ (- 4294967280) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse12 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967283)) 4294967296) 4294967296)) (.cse7 (* (div (+ (- 4294967289) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse17 (* 4294967296 (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967286)) 4294967296))) (.cse11 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967285)) 4294967296) 4294967296)) (.cse8 (* (div (+ (- 4294967293) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse3 (* (div (+ (- 4294967292) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse13 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967279)) 4294967296) 4294967296)) (.cse16 (* (div (+ (- 4294967290) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse15 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967294)) 4294967296) 4294967296)) (.cse2 (< (+ 2147483613 |c_ULTIMATE.start_main_~nondetArea~0#1.offset|) 0)) (.cse14 (* (div (+ (- 4294967282) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse1 (* (div (+ (- 4294967284) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse0 (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~nondetArea~0#1.offset|))) (and (or (< .cse0 (+ 4294967318 .cse1)) (< (+ 22 (* (div (+ 12 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) .cse2) (or (< .cse0 (+ .cse3 8589934622)) (< (+ (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 2147483644)) 4294967296) 4294967296) 4294967326) .cse0)) (or (< .cse0 (+ 8589934621 .cse4)) (< (+ (* (div (+ (- 2147483643) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296) 4294967325) .cse0)) (or (< (+ (* (div (+ (- 2147483647) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296) 4294967329) .cse0) (< .cse0 (+ 8589934625 .cse5))) (or (< .cse0 (+ 8589934617 .cse6)) (< (+ (* (div (+ (- 2147483639) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296) 4294967321) .cse0)) (or (< .cse0 (+ 4294967321 .cse6)) .cse2 (< (+ 25 (* (div (+ 9 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0)) (or (< .cse0 (+ 4294967329 .cse5)) (< (+ (* 4294967296 (div (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296)) 33) .cse0) .cse2) (or (< .cse0 (+ .cse7 4294967323)) (< (+ (* 4294967296 (div (+ 7 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) 27) .cse0) .cse2) (or (< (+ (* 4294967296 (div (+ 3 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) 31) .cse0) (< .cse0 (+ 4294967327 .cse8)) .cse2) (or (< (+ 4294967314 (* (div (+ (- 2147483632) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) (< .cse0 (+ .cse9 8589934610))) (or (< (+ 26 (* (div (+ 8 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) (< .cse0 (+ 4294967322 .cse10)) .cse2) (or (< .cse0 (+ .cse4 4294967325)) (< (+ 29 (* (div (+ 5 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) .cse2) (or (< (+ (* 4294967296 (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 2147483637)) 4294967296)) 4294967319) .cse0) (< .cse0 (+ .cse11 8589934615))) (or (< (+ (* (div (+ |c_ULTIMATE.start_main_~i~0#1| 13) 4294967296) 4294967296) 21) .cse0) (< .cse0 (+ .cse12 4294967317)) .cse2) (or (< (+ 4294967322 (* (div (+ (- 2147483640) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) (< .cse0 (+ 8589934618 .cse10))) (or (< .cse0 (+ .cse13 8589934609)) (< (+ 4294967313 (* (div (+ (- 2147483631) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0)) (or (< (+ 20 (* 4294967296 (div (+ 14 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) .cse0) (< .cse0 (+ 4294967316 .cse14)) .cse2) (or (< .cse0 (+ .cse15 8589934624)) (< (+ (* 4294967296 (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 2147483646)) 4294967296)) 4294967328) .cse0)) (or (< (+ 18 (* (div (+ 16 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) (< .cse0 (+ 4294967314 .cse9)) .cse2) (or (< (+ (* (div (+ (- 2147483635) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296) 4294967317) .cse0) (< .cse0 (+ .cse12 8589934613))) (or (< (+ (* (div (+ (- 2147483641) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296) 4294967323) .cse0) (< .cse0 (+ 8589934619 .cse7))) (or (< .cse0 (+ .cse16 4294967324)) (< (+ 28 (* (div (+ 6 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) .cse2) (or (< (+ (* (div (+ |c_ULTIMATE.start_main_~i~0#1| 10) 4294967296) 4294967296) 24) .cse0) (< .cse0 (+ 4294967320 .cse17)) .cse2) (or (< .cse0 (+ 8589934616 .cse17)) (< (+ 4294967320 (* (div (+ (- 2147483638) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0)) (or (< (+ 23 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| 11) 4294967296) 4294967296)) .cse0) .cse2 (< .cse0 (+ .cse11 4294967319))) (or (let ((.cse20 (mod |c_ULTIMATE.start_main_~n~0#1| 4294967296))) (let ((.cse18 (+ .cse20 |c_ULTIMATE.start_main_~nondetArea~0#1.offset|)) (.cse19 (<= .cse20 2147483647))) (and (or (<= 35 .cse18) (< .cse18 34) (not .cse19)) (or (<= 4294967331 .cse18) (< .cse18 4294967330) .cse19)))) (< |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~n~0#1|)) (or (< .cse0 (+ .cse8 8589934623)) (< (+ 4294967327 (* (div (+ (- 2147483645) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0)) (or (< .cse0 (+ .cse3 4294967326)) .cse2 (< (+ 30 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| 4) 4294967296) 4294967296)) .cse0)) (or (< (+ (* (div (+ |c_ULTIMATE.start_main_~i~0#1| 17) 4294967296) 4294967296) 17) .cse0) (< .cse0 (+ .cse13 4294967313)) .cse2) (or (< (+ (* 4294967296 (div (+ (- 2147483642) |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) 4294967324) .cse0) (< .cse0 (+ 8589934620 .cse16))) (or (< (+ 32 (* 4294967296 (div (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) .cse0) (< .cse0 (+ .cse15 4294967328)) .cse2) (or (< .cse0 (+ 8589934612 .cse14)) (< (+ 4294967316 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 2147483634)) 4294967296) 4294967296)) .cse0)) (or (< .cse0 (+ 8589934614 .cse1)) (< (+ 4294967318 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 2147483636)) 4294967296) 4294967296)) .cse0)))) is different from false [2022-11-20 21:29:32,202 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (* (div (+ (- 4294967287) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse4 (* (div (+ (- 4294967291) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse12 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967288)) 4294967296) 4294967296)) (.cse11 (* (div (+ (- 4294967280) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse14 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967283)) 4294967296) 4294967296)) (.cse9 (* (div (+ (- 4294967289) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse19 (* 4294967296 (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967286)) 4294967296))) (.cse13 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967285)) 4294967296) 4294967296)) (.cse10 (* (div (+ (- 4294967293) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse3 (* (div (+ (- 4294967292) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse15 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967279)) 4294967296) 4294967296)) (.cse18 (* (div (+ (- 4294967290) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse17 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967294)) 4294967296) 4294967296)) (.cse2 (< (+ 2147483613 |c_ULTIMATE.start_main_~nondetArea~0#1.offset|) 0)) (.cse16 (* (div (+ (- 4294967282) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse1 (* (div (+ (- 4294967284) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) (.cse0 (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~nondetArea~0#1.offset|))) (and (or (< .cse0 (+ 4294967318 .cse1)) (< (+ 22 (* (div (+ 12 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) .cse2) (or (< .cse0 (+ .cse3 8589934622)) (< (+ (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 2147483644)) 4294967296) 4294967296) 4294967326) .cse0)) (or (< .cse0 (+ 8589934621 .cse4)) (< (+ (* (div (+ (- 2147483643) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296) 4294967325) .cse0)) (or (< .cse0 (+ 8589934617 .cse5)) (< (+ (* (div (+ (- 2147483639) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296) 4294967321) .cse0)) (or (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) |c_ULTIMATE.start_main_~n~0#1|) (let ((.cse8 (mod |c_ULTIMATE.start_main_~n~0#1| 4294967296))) (let ((.cse6 (+ .cse8 |c_ULTIMATE.start_main_~nondetArea~0#1.offset|)) (.cse7 (<= .cse8 2147483647))) (and (or (<= 35 .cse6) (< .cse6 34) (not .cse7)) (or (<= 4294967331 .cse6) (< .cse6 4294967330) .cse7))))) (or (< .cse0 (+ 4294967321 .cse5)) .cse2 (< (+ 25 (* (div (+ 9 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0)) (or (< .cse0 (+ .cse9 4294967323)) (< (+ (* 4294967296 (div (+ 7 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) 27) .cse0) .cse2) (or (< (+ (* 4294967296 (div (+ 3 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) 31) .cse0) (< .cse0 (+ 4294967327 .cse10)) .cse2) (or (< (+ 4294967314 (* (div (+ (- 2147483632) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) (< .cse0 (+ .cse11 8589934610))) (or (< (+ 26 (* (div (+ 8 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) (< .cse0 (+ 4294967322 .cse12)) .cse2) (or (< .cse0 (+ .cse4 4294967325)) (< (+ 29 (* (div (+ 5 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) .cse2) (or (< (+ (* 4294967296 (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 2147483637)) 4294967296)) 4294967319) .cse0) (< .cse0 (+ .cse13 8589934615))) (or (< (+ (* (div (+ |c_ULTIMATE.start_main_~i~0#1| 13) 4294967296) 4294967296) 21) .cse0) (< .cse0 (+ .cse14 4294967317)) .cse2) (or (< (+ 4294967322 (* (div (+ (- 2147483640) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) (< .cse0 (+ 8589934618 .cse12))) (or (< .cse0 (+ .cse15 8589934609)) (< (+ 4294967313 (* (div (+ (- 2147483631) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0)) (or (< (+ 20 (* 4294967296 (div (+ 14 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) .cse0) (< .cse0 (+ 4294967316 .cse16)) .cse2) (or (< .cse0 (+ .cse17 8589934624)) (< (+ (* 4294967296 (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 2147483646)) 4294967296)) 4294967328) .cse0)) (or (< (+ 18 (* (div (+ 16 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) (< .cse0 (+ 4294967314 .cse11)) .cse2) (or (< (+ (* (div (+ (- 2147483635) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296) 4294967317) .cse0) (< .cse0 (+ .cse14 8589934613))) (or (< (+ (* (div (+ (- 2147483641) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296) 4294967323) .cse0) (< .cse0 (+ 8589934619 .cse9))) (or (< .cse0 (+ .cse18 4294967324)) (< (+ 28 (* (div (+ 6 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0) .cse2) (or (< (+ (* (div (+ |c_ULTIMATE.start_main_~i~0#1| 10) 4294967296) 4294967296) 24) .cse0) (< .cse0 (+ 4294967320 .cse19)) .cse2) (or (< .cse0 (+ 8589934616 .cse19)) (< (+ 4294967320 (* (div (+ (- 2147483638) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0)) (or (< (+ 23 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| 11) 4294967296) 4294967296)) .cse0) .cse2 (< .cse0 (+ .cse13 4294967319))) (or (< .cse0 (+ .cse10 8589934623)) (< (+ 4294967327 (* (div (+ (- 2147483645) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4294967296)) .cse0)) (or (< .cse0 (+ .cse3 4294967326)) .cse2 (< (+ 30 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| 4) 4294967296) 4294967296)) .cse0)) (or (< (+ (* (div (+ |c_ULTIMATE.start_main_~i~0#1| 17) 4294967296) 4294967296) 17) .cse0) (< .cse0 (+ .cse15 4294967313)) .cse2) (or (< (+ (* 4294967296 (div (+ (- 2147483642) |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) 4294967324) .cse0) (< .cse0 (+ 8589934620 .cse18))) (or (< (+ 32 (* 4294967296 (div (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) .cse0) (< .cse0 (+ .cse17 4294967328)) .cse2) (or (< .cse0 (+ 8589934612 .cse16)) (< (+ 4294967316 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 2147483634)) 4294967296) 4294967296)) .cse0)) (or (< .cse0 (+ 8589934614 .cse1)) (< (+ 4294967318 (* (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 2147483636)) 4294967296) 4294967296)) .cse0)))) is different from false