./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur --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 64bit --witnessprinter.graph.data.programhash 1bedc761cea545b8144ad4138a379d7139cc98703c76e9b536a2e7389d5b6a10 --- 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-38b53e6 [2022-11-26 00:48:38,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:48:38,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:48:38,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:48:38,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:48:38,916 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:48:38,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:48:38,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:48:38,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:48:38,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:48:38,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:48:38,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:48:38,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:48:38,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:48:38,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:48:38,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:48:38,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:48:38,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:48:38,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:48:38,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:48:38,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:48:38,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:48:38,963 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:48:38,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:48:38,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:48:38,970 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:48:38,971 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:48:38,971 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:48:38,973 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:48:38,975 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:48:38,977 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:48:38,978 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:48:38,980 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:48:38,981 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:48:38,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:48:38,984 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:48:38,984 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:48:38,985 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:48:38,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:48:38,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:48:38,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:48:38,987 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-11-26 00:48:39,029 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:48:39,029 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:48:39,029 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:48:39,029 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:48:39,030 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:48:39,030 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:48:39,030 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:48:39,030 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:48:39,030 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:48:39,031 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:48:39,031 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:48:39,031 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:48:39,031 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:48:39,031 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:48:39,031 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:48:39,031 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:48:39,032 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:48:39,032 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:48:39,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:48:39,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:48:39,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:48:39,033 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:48:39,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:48:39,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:48:39,033 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:48:39,033 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:48:39,034 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:48:39,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:48:39,034 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:48:39,034 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:48:39,034 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:48:39,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:48:39,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:48:39,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:48:39,035 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:48:39,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:48:39,035 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:48:39,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:48:39,036 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:48:39,036 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_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bedc761cea545b8144ad4138a379d7139cc98703c76e9b536a2e7389d5b6a10 [2022-11-26 00:48:39,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:48:39,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:48:39,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:48:39,332 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:48:39,333 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:48:39,334 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c [2022-11-26 00:48:42,428 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:48:42,661 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:48:42,662 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c [2022-11-26 00:48:42,668 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/data/561ae23c4/16aaf6f7e76b40d097ec7f39eb645485/FLAGe3390f7e0 [2022-11-26 00:48:42,681 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/data/561ae23c4/16aaf6f7e76b40d097ec7f39eb645485 [2022-11-26 00:48:42,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:48:42,685 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:48:42,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:48:42,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:48:42,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:48:42,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:48:42" (1/1) ... [2022-11-26 00:48:42,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2027af03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:42, skipping insertion in model container [2022-11-26 00:48:42,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:48:42" (1/1) ... [2022-11-26 00:48:42,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:48:42,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:48:42,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:48:42,935 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:48:42,953 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:48:42,973 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:48:42,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:42 WrapperNode [2022-11-26 00:48:42,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:48:42,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:48:42,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:48:42,975 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:48:42,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:42" (1/1) ... [2022-11-26 00:48:42,992 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:42" (1/1) ... [2022-11-26 00:48:43,015 INFO L138 Inliner]: procedures = 10, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2022-11-26 00:48:43,019 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:48:43,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:48:43,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:48:43,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:48:43,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:42" (1/1) ... [2022-11-26 00:48:43,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:42" (1/1) ... [2022-11-26 00:48:43,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:42" (1/1) ... [2022-11-26 00:48:43,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:42" (1/1) ... [2022-11-26 00:48:43,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:42" (1/1) ... [2022-11-26 00:48:43,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:42" (1/1) ... [2022-11-26 00:48:43,044 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:42" (1/1) ... [2022-11-26 00:48:43,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:42" (1/1) ... [2022-11-26 00:48:43,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:48:43,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:48:43,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:48:43,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:48:43,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:42" (1/1) ... [2022-11-26 00:48:43,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:48:43,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:43,086 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:48:43,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:48:43,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:48:43,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:48:43,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:48:43,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:48:43,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:48:43,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:48:43,217 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:48:43,219 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:48:43,383 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:48:43,422 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:48:43,422 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-26 00:48:43,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:48:43 BoogieIcfgContainer [2022-11-26 00:48:43,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:48:43,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:48:43,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:48:43,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:48:43,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:48:42" (1/3) ... [2022-11-26 00:48:43,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5535543d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:48:43, skipping insertion in model container [2022-11-26 00:48:43,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:42" (2/3) ... [2022-11-26 00:48:43,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5535543d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:48:43, skipping insertion in model container [2022-11-26 00:48:43,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:48:43" (3/3) ... [2022-11-26 00:48:43,442 INFO L112 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-2.c [2022-11-26 00:48:43,466 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:48:43,466 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-11-26 00:48:43,524 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:48:43,530 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;@64ae1488, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:48:43,531 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-11-26 00:48:43,535 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 26 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) [2022-11-26 00:48:43,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 00:48:43,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:43,540 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 00:48:43,541 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-26 00:48:43,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:43,546 INFO L85 PathProgramCache]: Analyzing trace with hash 99305, now seen corresponding path program 1 times [2022-11-26 00:48:43,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:43,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760439207] [2022-11-26 00:48:43,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:43,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:43,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:43,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:43,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760439207] [2022-11-26 00:48:43,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760439207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:48:43,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:48:43,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:48:43,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583036085] [2022-11-26 00:48:43,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:48:43,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:48:43,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:43,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:48:43,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:48:43,829 INFO L87 Difference]: Start difference. First operand has 27 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 26 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) 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) [2022-11-26 00:48:43,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:43,939 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-11-26 00:48:43,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:48:43,942 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 [2022-11-26 00:48:43,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:43,950 INFO L225 Difference]: With dead ends: 39 [2022-11-26 00:48:43,950 INFO L226 Difference]: Without dead ends: 38 [2022-11-26 00:48:43,952 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 [2022-11-26 00:48:43,955 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:43,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 37 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:48:43,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-26 00:48:44,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2022-11-26 00:48:44,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.9) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:48:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-11-26 00:48:44,014 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 3 [2022-11-26 00:48:44,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:44,014 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-11-26 00:48:44,015 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) [2022-11-26 00:48:44,015 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-11-26 00:48:44,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 00:48:44,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:44,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 00:48:44,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:48:44,016 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-26 00:48:44,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:44,017 INFO L85 PathProgramCache]: Analyzing trace with hash 99306, now seen corresponding path program 1 times [2022-11-26 00:48:44,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:44,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276194457] [2022-11-26 00:48:44,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:44,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:44,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:44,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:44,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276194457] [2022-11-26 00:48:44,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276194457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:48:44,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:48:44,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:48:44,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256997627] [2022-11-26 00:48:44,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:48:44,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:48:44,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:44,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:48:44,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:48:44,268 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:48:44,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:44,316 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-11-26 00:48:44,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:48:44,318 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 [2022-11-26 00:48:44,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:44,319 INFO L225 Difference]: With dead ends: 32 [2022-11-26 00:48:44,319 INFO L226 Difference]: Without dead ends: 32 [2022-11-26 00:48:44,319 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 [2022-11-26 00:48:44,321 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 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 [2022-11-26 00:48:44,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:48:44,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-26 00:48:44,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-26 00:48:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:48:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-11-26 00:48:44,327 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 3 [2022-11-26 00:48:44,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:44,327 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-11-26 00:48:44,327 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) [2022-11-26 00:48:44,327 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-11-26 00:48:44,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:48:44,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:44,328 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-11-26 00:48:44,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:48:44,329 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-26 00:48:44,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:44,329 INFO L85 PathProgramCache]: Analyzing trace with hash 95488166, now seen corresponding path program 1 times [2022-11-26 00:48:44,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:44,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517439812] [2022-11-26 00:48:44,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:44,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:44,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:44,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517439812] [2022-11-26 00:48:44,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517439812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:44,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347104219] [2022-11-26 00:48:44,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:44,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:44,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:44,666 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:48:44,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:48:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:44,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:48:44,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:48:44,819 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 6 treesize of output 5 [2022-11-26 00:48:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:44,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:48:45,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:45,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347104219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:48:45,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [964207105] [2022-11-26 00:48:45,057 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-26 00:48:45,057 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:48:45,067 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:48:45,073 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:48:45,073 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:48:45,128 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 6 treesize of output 5 [2022-11-26 00:48:45,179 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 [2022-11-26 00:48:45,340 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:48:45,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 142 [2022-11-26 00:48:45,546 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 16 treesize of output 12 [2022-11-26 00:48:45,574 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 16 treesize of output 12 [2022-11-26 00:48:45,590 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:48:45,901 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '202#(and (<= 0 |ULTIMATE.start_main_~q~0#1.offset|) (<= |ULTIMATE.start_main_#t~nondet3#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet3#1|)) (not (<= (+ |ULTIMATE.start_main_~q~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~q~0#1.base|))) (<= |ULTIMATE.start_main_~q~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:48:45,901 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:48:45,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:48:45,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2022-11-26 00:48:45,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192676898] [2022-11-26 00:48:45,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:48:45,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:48:45,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:45,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:48:45,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:48:45,903 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-26 00:48:46,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:46,092 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2022-11-26 00:48:46,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:48:46,093 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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 [2022-11-26 00:48:46,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:46,093 INFO L225 Difference]: With dead ends: 36 [2022-11-26 00:48:46,094 INFO L226 Difference]: Without dead ends: 36 [2022-11-26 00:48:46,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:48:46,095 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:46,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 79 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:48:46,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-26 00:48:46,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-26 00:48:46,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 35 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:48:46,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-11-26 00:48:46,100 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 5 [2022-11-26 00:48:46,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:46,101 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-11-26 00:48:46,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-26 00:48:46,101 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-11-26 00:48:46,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:48:46,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:46,102 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-26 00:48:46,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-26 00:48:46,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:46,307 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-26 00:48:46,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:46,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1433174170, now seen corresponding path program 1 times [2022-11-26 00:48:46,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:46,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145188772] [2022-11-26 00:48:46,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:46,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:48:46,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:46,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145188772] [2022-11-26 00:48:46,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145188772] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:46,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854722901] [2022-11-26 00:48:46,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:46,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:46,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:46,490 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:48:46,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:48:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:46,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:48:46,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:48:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:46,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:48:46,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:46,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854722901] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:48:46,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1885974504] [2022-11-26 00:48:46,724 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:48:46,724 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:48:46,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:48:46,725 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:48:46,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:48:46,741 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 6 treesize of output 5 [2022-11-26 00:48:46,766 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 [2022-11-26 00:48:46,848 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:48:46,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 142 [2022-11-26 00:48:46,963 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 16 treesize of output 12 [2022-11-26 00:48:46,983 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 16 treesize of output 12 [2022-11-26 00:48:47,097 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:48:47,485 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '369#(and (= |ULTIMATE.start_main_~q~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_#t~short5#1| (exists ((|v_ULTIMATE.start_main_~q~0#1.base_32| Int) (|v_ULTIMATE.start_main_~q~0#1.offset_28| Int)) (and (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~q~0#1.base_32|) (+ |v_ULTIMATE.start_main_~q~0#1.offset_28| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483647) (<= |v_ULTIMATE.start_main_~q~0#1.offset_28| 0) (<= 0 |v_ULTIMATE.start_main_~q~0#1.offset_28|) (= (select |#valid| |v_ULTIMATE.start_main_~q~0#1.base_32|) 1) (<= 4 (+ |v_ULTIMATE.start_main_~q~0#1.offset_28| (* |ULTIMATE.start_main_~i~0#1| 4))) (<= 0 (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~q~0#1.base_32|) (+ |v_ULTIMATE.start_main_~q~0#1.offset_28| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483648)) (<= (+ |v_ULTIMATE.start_main_~q~0#1.offset_28| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |v_ULTIMATE.start_main_~q~0#1.base_32|)))) (= |#NULL.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| 1048)) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| |ULTIMATE.start_main_~q~0#1.offset|) (<= 0 |#StackHeapBarrier|) (not (= (select |#valid| |ULTIMATE.start_main_~q~0#1.base|) 1)) (= |#NULL.base| 0))' at error location [2022-11-26 00:48:47,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:48:47,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:48:47,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 15 [2022-11-26 00:48:47,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665686189] [2022-11-26 00:48:47,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:48:47,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-26 00:48:47,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:47,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-26 00:48:47,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:48:47,488 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:48:47,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:47,765 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-11-26 00:48:47,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:48:47,765 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 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 [2022-11-26 00:48:47,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:47,766 INFO L225 Difference]: With dead ends: 45 [2022-11-26 00:48:47,766 INFO L226 Difference]: Without dead ends: 45 [2022-11-26 00:48:47,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=676, Unknown=0, NotChecked=0, Total=930 [2022-11-26 00:48:47,768 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 50 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:47,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 32 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:48:47,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-26 00:48:47,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2022-11-26 00:48:47,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:48:47,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-11-26 00:48:47,773 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 13 [2022-11-26 00:48:47,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:47,774 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-11-26 00:48:47,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:48:47,774 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-11-26 00:48:47,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 00:48:47,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:47,775 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2022-11-26 00:48:47,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-26 00:48:47,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:47,980 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-26 00:48:47,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:47,981 INFO L85 PathProgramCache]: Analyzing trace with hash 691325135, now seen corresponding path program 1 times [2022-11-26 00:48:47,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:47,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47473524] [2022-11-26 00:48:47,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:47,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:48,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:48,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:48,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47473524] [2022-11-26 00:48:48,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47473524] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:48,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237117062] [2022-11-26 00:48:48,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:48,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:48,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:48,295 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:48:48,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:48:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:48,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:48:48,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:48:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:48,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:48:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:48,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237117062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:48:48,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [20169763] [2022-11-26 00:48:48,698 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:48:48,699 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:48:48,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:48:48,699 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:48:48,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:48:48,720 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 6 treesize of output 5 [2022-11-26 00:48:48,759 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 [2022-11-26 00:48:48,834 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:48:48,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 142 [2022-11-26 00:48:48,931 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 16 treesize of output 12 [2022-11-26 00:48:48,955 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 16 treesize of output 12 [2022-11-26 00:48:49,018 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:48:49,428 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '647#(and (exists ((|v_ULTIMATE.start_main_~q~0#1.offset_30| Int) (|v_ULTIMATE.start_main_~q~0#1.base_34| Int)) (and (<= (+ |v_ULTIMATE.start_main_~q~0#1.offset_30| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |v_ULTIMATE.start_main_~q~0#1.base_34|)) (<= 0 (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~q~0#1.base_34|) (+ |v_ULTIMATE.start_main_~q~0#1.offset_30| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483648)) (= (select |#valid| |v_ULTIMATE.start_main_~q~0#1.base_34|) 1) (<= 4 (+ |v_ULTIMATE.start_main_~q~0#1.offset_30| (* |ULTIMATE.start_main_~i~0#1| 4))) (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~q~0#1.base_34|) (+ |v_ULTIMATE.start_main_~q~0#1.offset_30| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483647) (<= |v_ULTIMATE.start_main_~q~0#1.offset_30| 0) (<= 0 |v_ULTIMATE.start_main_~q~0#1.offset_30|))) (not (<= (+ |ULTIMATE.start_main_~q~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~q~0#1.base|))) (= |ULTIMATE.start_main_~q~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_#t~short5#1| (= |#NULL.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| 1048)) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| |ULTIMATE.start_main_~q~0#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:48:49,428 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:48:49,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:48:49,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-26 00:48:49,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265644740] [2022-11-26 00:48:49,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:48:49,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 00:48:49,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:49,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 00:48:49,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=557, Unknown=0, NotChecked=0, Total=870 [2022-11-26 00:48:49,431 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:48:49,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:49,547 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2022-11-26 00:48:49,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 00:48:49,550 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2022-11-26 00:48:49,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:49,550 INFO L225 Difference]: With dead ends: 63 [2022-11-26 00:48:49,551 INFO L226 Difference]: Without dead ends: 63 [2022-11-26 00:48:49,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=313, Invalid=557, Unknown=0, NotChecked=0, Total=870 [2022-11-26 00:48:49,552 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:49,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 80 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:48:49,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-26 00:48:49,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-26 00:48:49,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.1578947368421053) 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) [2022-11-26 00:48:49,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-11-26 00:48:49,557 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 25 [2022-11-26 00:48:49,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:49,558 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-11-26 00:48:49,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:48:49,558 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-11-26 00:48:49,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-26 00:48:49,563 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:49,563 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1] [2022-11-26 00:48:49,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:48:49,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:49,770 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-26 00:48:49,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:49,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1705035679, now seen corresponding path program 2 times [2022-11-26 00:48:49,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:49,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338694329] [2022-11-26 00:48:49,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:49,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:50,549 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:50,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:50,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338694329] [2022-11-26 00:48:50,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338694329] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:50,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801824737] [2022-11-26 00:48:50,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:48:50,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:50,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:50,552 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:48:50,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:48:50,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-26 00:48:50,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:48:50,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:48:50,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:48:50,650 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 [2022-11-26 00:48:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-11-26 00:48:50,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:48:50,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801824737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:48:50,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:48:50,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [24] total 26 [2022-11-26 00:48:50,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928533970] [2022-11-26 00:48:50,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:48:50,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:48:50,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:50,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:48:50,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:48:50,871 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2022-11-26 00:48:50,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:50,936 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2022-11-26 00:48:50,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:48:50,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 49 [2022-11-26 00:48:50,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:50,938 INFO L225 Difference]: With dead ends: 75 [2022-11-26 00:48:50,938 INFO L226 Difference]: Without dead ends: 75 [2022-11-26 00:48:50,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:48:50,939 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 48 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:50,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 13 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:48:50,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-26 00:48:50,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2022-11-26 00:48:50,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.171875) internal successors, (75), 68 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) [2022-11-26 00:48:50,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2022-11-26 00:48:50,946 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 49 [2022-11-26 00:48:50,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:50,946 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2022-11-26 00:48:50,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2022-11-26 00:48:50,947 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2022-11-26 00:48:50,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-26 00:48:50,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:50,948 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:48:50,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:48:51,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 00:48:51,160 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-26 00:48:51,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:51,160 INFO L85 PathProgramCache]: Analyzing trace with hash -2138032191, now seen corresponding path program 1 times [2022-11-26 00:48:51,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:51,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176101119] [2022-11-26 00:48:51,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:51,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:51,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-11-26 00:48:51,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:51,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176101119] [2022-11-26 00:48:51,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176101119] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:48:51,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:48:51,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:48:51,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556015671] [2022-11-26 00:48:51,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:48:51,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:48:51,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:51,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:48:51,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:48:51,289 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:48:51,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:51,302 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2022-11-26 00:48:51,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:48:51,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-26 00:48:51,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:51,306 INFO L225 Difference]: With dead ends: 68 [2022-11-26 00:48:51,307 INFO L226 Difference]: Without dead ends: 68 [2022-11-26 00:48:51,307 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 [2022-11-26 00:48:51,308 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:51,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 12 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:48:51,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-26 00:48:51,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-26 00:48:51,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:48:51,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2022-11-26 00:48:51,328 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 51 [2022-11-26 00:48:51,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:51,333 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2022-11-26 00:48:51,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:48:51,334 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2022-11-26 00:48:51,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-26 00:48:51,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:51,339 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:48:51,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:48:51,339 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-26 00:48:51,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:51,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1654565084, now seen corresponding path program 1 times [2022-11-26 00:48:51,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:51,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458461544] [2022-11-26 00:48:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:51,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:51,504 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-11-26 00:48:51,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:51,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458461544] [2022-11-26 00:48:51,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458461544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:48:51,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:48:51,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:48:51,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575786638] [2022-11-26 00:48:51,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:48:51,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:48:51,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:51,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:48:51,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:48:51,508 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:48:51,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:51,550 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2022-11-26 00:48:51,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:48:51,551 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-26 00:48:51,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:51,551 INFO L225 Difference]: With dead ends: 73 [2022-11-26 00:48:51,551 INFO L226 Difference]: Without dead ends: 73 [2022-11-26 00:48:51,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:48:51,553 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:51,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 20 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:48:51,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-26 00:48:51,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2022-11-26 00:48:51,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 64 states have (on average 1.140625) internal successors, (73), 67 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:48:51,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2022-11-26 00:48:51,573 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 53 [2022-11-26 00:48:51,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:51,574 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2022-11-26 00:48:51,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:48:51,574 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2022-11-26 00:48:51,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-26 00:48:51,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:51,576 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:48:51,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:48:51,576 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-26 00:48:51,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:51,577 INFO L85 PathProgramCache]: Analyzing trace with hash 143341699, now seen corresponding path program 1 times [2022-11-26 00:48:51,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:51,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008609957] [2022-11-26 00:48:51,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:51,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:52,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:52,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008609957] [2022-11-26 00:48:52,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008609957] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:52,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801899748] [2022-11-26 00:48:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:52,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:52,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:52,244 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:48:52,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:48:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:52,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 00:48:52,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:48:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:52,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:48:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:53,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801899748] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:48:53,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2041056897] [2022-11-26 00:48:53,303 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:48:53,303 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:48:53,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:48:53,304 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:48:53,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:48:53,318 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 6 treesize of output 5 [2022-11-26 00:48:53,340 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 16 treesize of output 12 [2022-11-26 00:48:53,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 141 [2022-11-26 00:48:53,432 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 16 treesize of output 12 [2022-11-26 00:48:53,449 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 16 treesize of output 12 [2022-11-26 00:48:53,592 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-26 00:48:53,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:48:53,652 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:48:54,801 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1748#(and (<= (+ |ULTIMATE.start_main_~q~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~q~0#1.base|)) (< |ULTIMATE.start_main_~p~0#1.base| |#StackHeapBarrier|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (not (<= 0 (select (select |#memory_int| |ULTIMATE.start_main_~q~0#1.base|) |ULTIMATE.start_main_~q~0#1.offset|))) (or (exists ((|v_ULTIMATE.start_main_~q~0#1.offset_32| Int)) (and (<= (select (select |#memory_int| |ULTIMATE.start_main_~q~0#1.base|) (+ |v_ULTIMATE.start_main_~q~0#1.offset_32| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483647) (<= 0 |v_ULTIMATE.start_main_~q~0#1.offset_32|) (<= (+ |v_ULTIMATE.start_main_~q~0#1.offset_32| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~q~0#1.base|)) (<= |v_ULTIMATE.start_main_~q~0#1.offset_32| 0) (<= 4 (+ |v_ULTIMATE.start_main_~q~0#1.offset_32| (* |ULTIMATE.start_main_~i~0#1| 4))) (<= 0 (+ 2147483648 (select (select |#memory_int| |ULTIMATE.start_main_~q~0#1.base|) (+ |v_ULTIMATE.start_main_~q~0#1.offset_32| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))))))) (exists ((|v_ULTIMATE.start_main_~q~0#1.offset_32| Int)) (and (exists ((|v_ULTIMATE.start_main_~q~0#1.base_36| Int)) (and (<= (+ |v_ULTIMATE.start_main_~q~0#1.offset_32| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |v_ULTIMATE.start_main_~q~0#1.base_36|)) (= (select |#valid| |v_ULTIMATE.start_main_~q~0#1.base_36|) 1) (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~q~0#1.base_36|) (+ |v_ULTIMATE.start_main_~q~0#1.offset_32| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483647) (<= 0 (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~q~0#1.base_36|) (+ |v_ULTIMATE.start_main_~q~0#1.offset_32| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483648)))) (<= 0 |v_ULTIMATE.start_main_~q~0#1.offset_32|) (<= |v_ULTIMATE.start_main_~q~0#1.offset_32| 0) (<= 4 (+ |v_ULTIMATE.start_main_~q~0#1.offset_32| (* |ULTIMATE.start_main_~i~0#1| 4)))))) (= |ULTIMATE.start_main_~q~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= |#NULL.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| 1048)) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| |ULTIMATE.start_main_~q~0#1.offset|) (<= 0 |#StackHeapBarrier|) (= (select |#valid| |ULTIMATE.start_main_~q~0#1.base|) 0) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:48:54,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:48:54,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:48:54,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-26 00:48:54,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66141243] [2022-11-26 00:48:54,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:48:54,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-26 00:48:54,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:54,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-26 00:48:54,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1200, Invalid=2106, Unknown=0, NotChecked=0, Total=3306 [2022-11-26 00:48:54,806 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:48:55,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:55,036 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2022-11-26 00:48:55,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-26 00:48:55,037 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 0 states have call successors, (0), 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 54 [2022-11-26 00:48:55,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:55,038 INFO L225 Difference]: With dead ends: 116 [2022-11-26 00:48:55,038 INFO L226 Difference]: Without dead ends: 116 [2022-11-26 00:48:55,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1200, Invalid=2106, Unknown=0, NotChecked=0, Total=3306 [2022-11-26 00:48:55,040 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:55,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 42 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:48:55,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-26 00:48:55,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-11-26 00:48:55,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 112 states have (on average 1.0803571428571428) internal successors, (121), 115 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:48:55,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2022-11-26 00:48:55,046 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 54 [2022-11-26 00:48:55,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:55,046 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2022-11-26 00:48:55,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:48:55,047 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2022-11-26 00:48:55,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-26 00:48:55,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:55,048 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:48:55,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:48:55,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:55,255 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-26 00:48:55,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:55,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1795092765, now seen corresponding path program 2 times [2022-11-26 00:48:55,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:55,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947195992] [2022-11-26 00:48:55,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:55,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:57,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:57,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947195992] [2022-11-26 00:48:57,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947195992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:57,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355933072] [2022-11-26 00:48:57,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:48:57,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:57,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:57,649 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:48:57,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:48:57,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-26 00:48:57,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:48:57,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:48:57,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:48:58,304 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~p~0#1.base| Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~p~0#1.base|) 0) (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~p~0#1.base| 0)))) is different from true [2022-11-26 00:48:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-11-26 00:48:58,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:48:58,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355933072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:48:58,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:48:58,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [48] total 50 [2022-11-26 00:48:58,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395499145] [2022-11-26 00:48:58,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:48:58,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:48:58,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:58,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:48:58,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1273, Unknown=1, NotChecked=96, Total=2550 [2022-11-26 00:48:58,310 INFO L87 Difference]: Start difference. First operand 116 states and 121 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:48:58,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:58,381 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2022-11-26 00:48:58,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:48:58,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-11-26 00:48:58,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:58,383 INFO L225 Difference]: With dead ends: 115 [2022-11-26 00:48:58,383 INFO L226 Difference]: Without dead ends: 111 [2022-11-26 00:48:58,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1183, Invalid=1370, Unknown=1, NotChecked=98, Total=2652 [2022-11-26 00:48:58,385 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:58,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 11 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-11-26 00:48:58,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-26 00:48:58,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-11-26 00:48:58,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 108 states have (on average 1.0648148148148149) internal successors, (115), 110 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:48:58,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2022-11-26 00:48:58,389 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 102 [2022-11-26 00:48:58,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:58,389 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2022-11-26 00:48:58,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:48:58,390 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2022-11-26 00:48:58,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-26 00:48:58,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:58,391 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:48:58,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:48:58,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:58,599 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-26 00:48:58,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:58,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1793758094, now seen corresponding path program 1 times [2022-11-26 00:48:58,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:58,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116243055] [2022-11-26 00:48:58,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:58,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:01,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2119 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:49:01,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:49:01,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116243055] [2022-11-26 00:49:01,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116243055] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:49:01,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315208626] [2022-11-26 00:49:01,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:49:01,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:49:01,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:49:01,112 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:49:01,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:49:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:01,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-26 00:49:01,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:49:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2119 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:49:01,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:49:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2119 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:49:04,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315208626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:49:04,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [637434090] [2022-11-26 00:49:04,837 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-26 00:49:04,838 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:49:04,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:49:04,838 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:49:04,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:49:04,851 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 6 treesize of output 5 [2022-11-26 00:49:04,867 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 [2022-11-26 00:49:04,917 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:49:04,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 142 [2022-11-26 00:49:05,011 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 16 treesize of output 12 [2022-11-26 00:49:05,026 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 16 treesize of output 12 [2022-11-26 00:49:05,349 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:49:06,425 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3274#(and (< (select |#length| |ULTIMATE.start_main_~q~0#1.base|) (+ |ULTIMATE.start_main_~q~0#1.offset| 4)) (<= 1048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~q~0#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:49:06,425 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:49:06,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:49:06,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-11-26 00:49:06,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769000744] [2022-11-26 00:49:06,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:49:06,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-26 00:49:06,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:49:06,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-26 00:49:06,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4678, Invalid=6242, Unknown=0, NotChecked=0, Total=10920 [2022-11-26 00:49:06,433 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 97 states, 97 states have (on average 2.0309278350515463) internal successors, (197), 96 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:49:06,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:49:06,841 INFO L93 Difference]: Finished difference Result 207 states and 211 transitions. [2022-11-26 00:49:06,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-26 00:49:06,842 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0309278350515463) internal successors, (197), 96 states have internal predecessors, (197), 0 states have call successors, (0), 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 102 [2022-11-26 00:49:06,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:49:06,844 INFO L225 Difference]: With dead ends: 207 [2022-11-26 00:49:06,844 INFO L226 Difference]: Without dead ends: 207 [2022-11-26 00:49:06,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4678, Invalid=6242, Unknown=0, NotChecked=0, Total=10920 [2022-11-26 00:49:06,848 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:49:06,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 45 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:49:06,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-26 00:49:06,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-11-26 00:49:06,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 204 states have (on average 1.0343137254901962) internal successors, (211), 206 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:49:06,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 211 transitions. [2022-11-26 00:49:06,854 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 211 transitions. Word has length 102 [2022-11-26 00:49:06,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:49:06,854 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 211 transitions. [2022-11-26 00:49:06,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0309278350515463) internal successors, (197), 96 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:49:06,855 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 211 transitions. [2022-11-26 00:49:06,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-11-26 00:49:06,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:49:06,857 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:49:06,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:49:07,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 00:49:07,068 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-26 00:49:07,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:49:07,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1199417038, now seen corresponding path program 2 times [2022-11-26 00:49:07,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:49:07,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606523899] [2022-11-26 00:49:07,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:49:07,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:49:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8839 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:49:14,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:49:14,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606523899] [2022-11-26 00:49:14,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606523899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:49:14,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977754767] [2022-11-26 00:49:14,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:49:14,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:49:14,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:49:14,698 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:49:14,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:49:14,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:49:14,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:49:14,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:49:14,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:49:14,901 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 [2022-11-26 00:49:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8839 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2022-11-26 00:49:16,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:49:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8839 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2022-11-26 00:49:17,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977754767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:49:17,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [843126211] [2022-11-26 00:49:17,344 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-26 00:49:17,344 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:49:17,345 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:49:17,345 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:49:17,345 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:49:17,362 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 6 treesize of output 5 [2022-11-26 00:49:17,380 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 16 treesize of output 12 [2022-11-26 00:49:17,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 141 [2022-11-26 00:49:17,468 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 16 treesize of output 12 [2022-11-26 00:49:17,481 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 16 treesize of output 12 [2022-11-26 00:49:17,773 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:49:19,325 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4987#(and (< (select |#length| |ULTIMATE.start_main_~q~0#1.base|) (+ |ULTIMATE.start_main_~q~0#1.offset| 4)) (<= 1048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~q~0#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:49:19,325 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:49:19,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:49:19,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 6, 6] total 108 [2022-11-26 00:49:19,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969597000] [2022-11-26 00:49:19,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:49:19,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-11-26 00:49:19,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:49:19,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-11-26 00:49:19,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4728, Invalid=8844, Unknown=0, NotChecked=0, Total=13572 [2022-11-26 00:49:19,335 INFO L87 Difference]: Start difference. First operand 207 states and 211 transitions. Second operand has 109 states, 109 states have (on average 2.018348623853211) internal successors, (220), 108 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:49:29,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:49:29,130 INFO L93 Difference]: Finished difference Result 240 states and 253 transitions. [2022-11-26 00:49:29,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-11-26 00:49:29,131 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.018348623853211) internal successors, (220), 108 states have internal predecessors, (220), 0 states have call successors, (0), 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 198 [2022-11-26 00:49:29,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:49:29,132 INFO L225 Difference]: With dead ends: 240 [2022-11-26 00:49:29,132 INFO L226 Difference]: Without dead ends: 240 [2022-11-26 00:49:29,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 573 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7888 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=15582, Invalid=33480, Unknown=0, NotChecked=0, Total=49062 [2022-11-26 00:49:29,139 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 885 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:49:29,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [885 Valid, 85 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:49:29,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-26 00:49:29,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 224. [2022-11-26 00:49:29,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0448430493273542) internal successors, (233), 223 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:49:29,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 233 transitions. [2022-11-26 00:49:29,146 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 233 transitions. Word has length 198 [2022-11-26 00:49:29,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:49:29,146 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 233 transitions. [2022-11-26 00:49:29,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.018348623853211) internal successors, (220), 108 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:49:29,147 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 233 transitions. [2022-11-26 00:49:29,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-11-26 00:49:29,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:49:29,149 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 5, 4, 4, 3, 2, 1, 1, 1, 1] [2022-11-26 00:49:29,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:49:29,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 00:49:29,355 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-26 00:49:29,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:49:29,356 INFO L85 PathProgramCache]: Analyzing trace with hash 93972914, now seen corresponding path program 1 times [2022-11-26 00:49:29,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:49:29,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908395054] [2022-11-26 00:49:29,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:49:29,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:49:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9058 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 9037 trivial. 0 not checked. [2022-11-26 00:49:29,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:49:29,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908395054] [2022-11-26 00:49:29,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908395054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:49:29,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:49:29,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:49:29,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473853553] [2022-11-26 00:49:29,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:49:29,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:49:29,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:49:29,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:49:29,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:49:29,590 INFO L87 Difference]: Start difference. First operand 224 states and 233 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2022-11-26 00:49:29,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:49:29,604 INFO L93 Difference]: Finished difference Result 227 states and 233 transitions. [2022-11-26 00:49:29,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:49:29,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) Word has length 212 [2022-11-26 00:49:29,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:49:29,606 INFO L225 Difference]: With dead ends: 227 [2022-11-26 00:49:29,607 INFO L226 Difference]: Without dead ends: 224 [2022-11-26 00:49:29,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:49:29,608 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:49:29,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:49:29,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-11-26 00:49:29,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-11-26 00:49:29,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0269058295964126) internal successors, (229), 223 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:49:29,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 229 transitions. [2022-11-26 00:49:29,614 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 229 transitions. Word has length 212 [2022-11-26 00:49:29,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:49:29,615 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 229 transitions. [2022-11-26 00:49:29,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2022-11-26 00:49:29,615 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 229 transitions. [2022-11-26 00:49:29,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-11-26 00:49:29,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:49:29,618 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 5, 5, 4, 4, 4, 1, 1, 1] [2022-11-26 00:49:29,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 00:49:29,619 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-26 00:49:29,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:49:29,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1124062715, now seen corresponding path program 3 times [2022-11-26 00:49:29,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:49:29,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135047309] [2022-11-26 00:49:29,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:49:29,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:49:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:36,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9067 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-26 00:49:36,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:49:36,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135047309] [2022-11-26 00:49:36,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135047309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:49:36,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679264799] [2022-11-26 00:49:36,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:49:36,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:49:36,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:49:36,337 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:49:36,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:51:41,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:51:41,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:51:41,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 1339 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-26 00:51:41,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:51:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9067 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-26 00:51:41,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:51:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9067 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-26 00:51:55,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679264799] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:51:55,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1287420407] [2022-11-26 00:51:55,153 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-26 00:51:55,154 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:51:55,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:51:55,154 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:51:55,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:51:55,173 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 6 treesize of output 5 [2022-11-26 00:51:55,194 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 [2022-11-26 00:51:55,257 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:51:55,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 142 [2022-11-26 00:51:55,354 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 16 treesize of output 12 [2022-11-26 00:51:55,374 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 16 treesize of output 12 [2022-11-26 00:51:55,795 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:51:57,493 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7602#(and (< (select |#length| |ULTIMATE.start_main_~q~0#1.base|) (+ |ULTIMATE.start_main_~q~0#1.offset| 4)) (<= 1048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~q~0#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:51:57,493 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:51:57,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:51:57,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 194 [2022-11-26 00:51:57,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836682304] [2022-11-26 00:51:57,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:51:57,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2022-11-26 00:51:57,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:57,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2022-11-26 00:51:57,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18937, Invalid=22069, Unknown=0, NotChecked=0, Total=41006 [2022-11-26 00:51:57,509 INFO L87 Difference]: Start difference. First operand 224 states and 229 transitions. Second operand has 195 states, 195 states have (on average 2.0153846153846153) internal successors, (393), 194 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:58,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:58,938 INFO L93 Difference]: Finished difference Result 418 states and 423 transitions. [2022-11-26 00:51:58,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2022-11-26 00:51:58,940 INFO L78 Accepts]: Start accepts. Automaton has has 195 states, 195 states have (on average 2.0153846153846153) internal successors, (393), 194 states have internal predecessors, (393), 0 states have call successors, (0), 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 215 [2022-11-26 00:51:58,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:58,942 INFO L225 Difference]: With dead ends: 418 [2022-11-26 00:51:58,942 INFO L226 Difference]: Without dead ends: 418 [2022-11-26 00:51:58,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2690 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=18937, Invalid=22069, Unknown=0, NotChecked=0, Total=41006 [2022-11-26 00:51:58,947 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:58,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 36 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:51:58,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-11-26 00:51:58,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 418. [2022-11-26 00:51:58,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.014388489208633) internal successors, (423), 417 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:58,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 423 transitions. [2022-11-26 00:51:58,961 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 423 transitions. Word has length 215 [2022-11-26 00:51:58,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:58,962 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 423 transitions. [2022-11-26 00:51:58,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 195 states, 195 states have (on average 2.0153846153846153) internal successors, (393), 194 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:58,962 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 423 transitions. [2022-11-26 00:51:58,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2022-11-26 00:51:58,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:58,972 INFO L195 NwaCegarLoop]: trace histogram [192, 192, 5, 5, 4, 4, 4, 1, 1, 1] [2022-11-26 00:51:59,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:51:59,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:51:59,186 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-26 00:51:59,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:59,187 INFO L85 PathProgramCache]: Analyzing trace with hash -324945097, now seen corresponding path program 4 times [2022-11-26 00:51:59,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:59,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877566233] [2022-11-26 00:51:59,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:59,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:52:30,017 INFO L134 CoverageAnalysis]: Checked inductivity of 36906 backedges. 0 proven. 36864 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-26 00:52:30,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:52:30,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877566233] [2022-11-26 00:52:30,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877566233] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:52:30,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359648076] [2022-11-26 00:52:30,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:52:30,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:52:30,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:52:30,020 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:52:30,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:52:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:52:30,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 2600 conjuncts, 194 conjunts are in the unsatisfiable core [2022-11-26 00:52:30,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:52:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 36906 backedges. 0 proven. 36864 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-26 00:52:31,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:53:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 36906 backedges. 0 proven. 36864 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-26 00:53:23,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359648076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:53:23,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1627099084] [2022-11-26 00:53:23,330 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-26 00:53:23,331 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:53:23,331 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:53:23,331 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:53:23,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:53:23,351 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 6 treesize of output 5 [2022-11-26 00:53:23,371 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 16 treesize of output 12 [2022-11-26 00:53:23,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 141 [2022-11-26 00:53:23,465 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 16 treesize of output 12 [2022-11-26 00:53:23,484 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 16 treesize of output 12 [2022-11-26 00:53:23,824 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:53:26,341 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11283#(and (< (select |#length| |ULTIMATE.start_main_~q~0#1.base|) (+ |ULTIMATE.start_main_~q~0#1.offset| 4)) (<= 1048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~q~0#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:53:26,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:53:26,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:53:26,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194, 194] total 388 [2022-11-26 00:53:26,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006316297] [2022-11-26 00:53:26,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:53:26,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 389 states [2022-11-26 00:53:26,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:26,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 389 interpolants. [2022-11-26 00:53:26,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75488, Invalid=81724, Unknown=0, NotChecked=0, Total=157212 [2022-11-26 00:53:26,375 INFO L87 Difference]: Start difference. First operand 418 states and 423 transitions. Second operand has 389 states, 389 states have (on average 2.007712082262211) internal successors, (781), 388 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:53:31,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:31,694 INFO L93 Difference]: Finished difference Result 806 states and 811 transitions. [2022-11-26 00:53:31,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 388 states. [2022-11-26 00:53:31,696 INFO L78 Accepts]: Start accepts. Automaton has has 389 states, 389 states have (on average 2.007712082262211) internal successors, (781), 388 states have internal predecessors, (781), 0 states have call successors, (0), 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 409 [2022-11-26 00:53:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:31,699 INFO L225 Difference]: With dead ends: 806 [2022-11-26 00:53:31,699 INFO L226 Difference]: Without dead ends: 806 [2022-11-26 00:53:31,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1419 GetRequests, 1024 SyntacticMatches, 0 SemanticMatches, 395 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5406 ImplicationChecksByTransitivity, 70.8s TimeCoverageRelationStatistics Valid=75488, Invalid=81724, Unknown=0, NotChecked=0, Total=157212 [2022-11-26 00:53:31,710 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:31,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 48 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-26 00:53:31,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-11-26 00:53:31,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 806. [2022-11-26 00:53:31,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 1.0074534161490682) internal successors, (811), 805 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:53:31,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 811 transitions. [2022-11-26 00:53:31,726 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 811 transitions. Word has length 409 [2022-11-26 00:53:31,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:31,727 INFO L495 AbstractCegarLoop]: Abstraction has 806 states and 811 transitions. [2022-11-26 00:53:31,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 389 states, 389 states have (on average 2.007712082262211) internal successors, (781), 388 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:53:31,728 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 811 transitions. [2022-11-26 00:53:31,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 798 [2022-11-26 00:53:31,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:31,755 INFO L195 NwaCegarLoop]: trace histogram [386, 386, 5, 5, 4, 4, 4, 1, 1, 1] [2022-11-26 00:53:31,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:53:31,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:53:31,966 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-26 00:53:31,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:31,967 INFO L85 PathProgramCache]: Analyzing trace with hash 617957551, now seen corresponding path program 5 times [2022-11-26 00:53:31,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:31,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256689880] [2022-11-26 00:53:31,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:31,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 149038 backedges. 0 proven. 148996 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-26 00:55:41,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:55:41,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256689880] [2022-11-26 00:55:41,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256689880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:55:41,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987566341] [2022-11-26 00:55:41,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:55:41,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:55:41,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:55:41,851 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:55:41,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:55:42,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-26 00:55:42,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:55:42,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-26 00:55:42,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:55:42,396 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 [2022-11-26 00:55:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 149038 backedges. 771 proven. 42 refuted. 0 times theorem prover too weak. 148225 trivial. 0 not checked. [2022-11-26 00:55:48,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:55:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 149038 backedges. 0 proven. 1198 refuted. 0 times theorem prover too weak. 147840 trivial. 0 not checked. [2022-11-26 00:55:57,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987566341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:55:57,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [606780828] [2022-11-26 00:55:57,202 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-26 00:55:57,202 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:55:57,202 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:55:57,203 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:55:57,203 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:55:57,220 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 6 treesize of output 5 [2022-11-26 00:55:57,239 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 16 treesize of output 12 [2022-11-26 00:55:57,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 141 [2022-11-26 00:55:57,316 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 16 treesize of output 12 [2022-11-26 00:55:57,331 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 16 treesize of output 12 [2022-11-26 00:55:57,619 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:56:01,813 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18092#(and (< (select |#length| |ULTIMATE.start_main_~q~0#1.base|) (+ |ULTIMATE.start_main_~q~0#1.offset| 4)) (<= 1048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~q~0#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:56:01,813 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:56:01,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:56:01,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [388, 11, 13] total 412 [2022-11-26 00:56:01,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660451276] [2022-11-26 00:56:01,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:56:01,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 413 states [2022-11-26 00:56:01,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:01,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 413 interpolants. [2022-11-26 00:56:01,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76816, Invalid=100004, Unknown=0, NotChecked=0, Total=176820 [2022-11-26 00:56:01,853 INFO L87 Difference]: Start difference. First operand 806 states and 811 transitions. Second operand has 413 states, 413 states have (on average 2.0314769975786926) internal successors, (839), 412 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:31,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:31,905 INFO L93 Difference]: Finished difference Result 879 states and 891 transitions. [2022-11-26 00:58:31,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 416 states. [2022-11-26 00:58:31,906 INFO L78 Accepts]: Start accepts. Automaton has has 413 states, 413 states have (on average 2.0314769975786926) internal successors, (839), 412 states have internal predecessors, (839), 0 states have call successors, (0), 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 797 [2022-11-26 00:58:31,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:31,911 INFO L225 Difference]: With dead ends: 879 [2022-11-26 00:58:31,911 INFO L226 Difference]: Without dead ends: 879 [2022-11-26 00:58:31,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3190 GetRequests, 2358 SyntacticMatches, 0 SemanticMatches, 832 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98128 ImplicationChecksByTransitivity, 221.2s TimeCoverageRelationStatistics Valid=242366, Invalid=452356, Unknown=0, NotChecked=0, Total=694722 [2022-11-26 00:58:31,959 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6716 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6716 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:31,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6716 Valid, 70 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-26 00:58:31,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-11-26 00:58:31,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 852. [2022-11-26 00:58:31,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 1.0141010575793183) internal successors, (863), 851 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:31,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 863 transitions. [2022-11-26 00:58:31,976 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 863 transitions. Word has length 797 [2022-11-26 00:58:31,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:31,978 INFO L495 AbstractCegarLoop]: Abstraction has 852 states and 863 transitions. [2022-11-26 00:58:31,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 413 states, 413 states have (on average 2.0314769975786926) internal successors, (839), 412 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:31,979 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 863 transitions. [2022-11-26 00:58:32,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2022-11-26 00:58:32,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:32,001 INFO L195 NwaCegarLoop]: trace histogram [388, 388, 11, 11, 10, 10, 10, 1, 1, 1] [2022-11-26 00:58:32,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:32,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-26 00:58:32,209 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-26 00:58:32,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:32,210 INFO L85 PathProgramCache]: Analyzing trace with hash -2049624377, now seen corresponding path program 6 times [2022-11-26 00:58:32,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:32,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201384009] [2022-11-26 00:58:32,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:32,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:34,873 INFO L134 CoverageAnalysis]: Checked inductivity of 150799 backedges. 0 proven. 150544 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-11-26 01:00:34,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:34,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201384009] [2022-11-26 01:00:34,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201384009] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:00:34,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563330156] [2022-11-26 01:00:34,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:00:34,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:34,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:34,876 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:34,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1474dd51-3058-4802-b146-14ea647da7a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process