./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-dietlibc/strlcat.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-dietlibc/strlcat.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh --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 4a2b4697f5c3b66d485090307ef74ec11d08954b2ae38adb1c0f438a86221c12 --- 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-2329fc7 [2022-12-14 13:03:02,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:03:02,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:03:02,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:03:02,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:03:02,784 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:03:02,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:03:02,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:03:02,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:03:02,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:03:02,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:03:02,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:03:02,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:03:02,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:03:02,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:03:02,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:03:02,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:03:02,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:03:02,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:03:02,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:03:02,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:03:02,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:03:02,804 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:03:02,805 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:03:02,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:03:02,807 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:03:02,807 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:03:02,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:03:02,809 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:03:02,809 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:03:02,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:03:02,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:03:02,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:03:02,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:03:02,812 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:03:02,812 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:03:02,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:03:02,812 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:03:02,812 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:03:02,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:03:02,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:03:02,814 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-12-14 13:03:02,831 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:03:02,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:03:02,831 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:03:02,831 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:03:02,832 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:03:02,832 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:03:02,832 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:03:02,832 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:03:02,832 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:03:02,832 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:03:02,832 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:03:02,833 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:03:02,833 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:03:02,833 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:03:02,833 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:03:02,833 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:03:02,833 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:03:02,833 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:03:02,834 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 13:03:02,834 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 13:03:02,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:03:02,834 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 13:03:02,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:03:02,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:03:02,834 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 13:03:02,834 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 13:03:02,834 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 13:03:02,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:03:02,835 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 13:03:02,835 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:03:02,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:03:02,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:03:02,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:03:02,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:03:02,835 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:03:02,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:03:02,835 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:03:02,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:03:02,836 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:03:02,836 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_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a2b4697f5c3b66d485090307ef74ec11d08954b2ae38adb1c0f438a86221c12 [2022-12-14 13:03:02,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:03:03,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:03:03,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:03:03,016 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:03:03,017 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:03:03,018 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/termination-dietlibc/strlcat.i [2022-12-14 13:03:05,547 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:03:05,745 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:03:05,746 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/sv-benchmarks/c/termination-dietlibc/strlcat.i [2022-12-14 13:03:05,755 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/data/91f355d84/ef9eef65884a4afc86a5f7d6dd2fd4e9/FLAG93e0972d7 [2022-12-14 13:03:06,125 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/data/91f355d84/ef9eef65884a4afc86a5f7d6dd2fd4e9 [2022-12-14 13:03:06,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:03:06,130 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:03:06,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:03:06,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:03:06,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:03:06,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:03:06" (1/1) ... [2022-12-14 13:03:06,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b3a749f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:03:06, skipping insertion in model container [2022-12-14 13:03:06,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:03:06" (1/1) ... [2022-12-14 13:03:06,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:03:06,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:03:06,348 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:03:06,356 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:03:06,383 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:03:06,398 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:03:06,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:03:06 WrapperNode [2022-12-14 13:03:06,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:03:06,399 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:03:06,399 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:03:06,399 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:03:06,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:03:06" (1/1) ... [2022-12-14 13:03:06,413 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:03:06" (1/1) ... [2022-12-14 13:03:06,428 INFO L138 Inliner]: procedures = 114, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 114 [2022-12-14 13:03:06,428 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:03:06,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:03:06,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:03:06,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:03:06,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:03:06" (1/1) ... [2022-12-14 13:03:06,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:03:06" (1/1) ... [2022-12-14 13:03:06,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:03:06" (1/1) ... [2022-12-14 13:03:06,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:03:06" (1/1) ... [2022-12-14 13:03:06,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:03:06" (1/1) ... [2022-12-14 13:03:06,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:03:06" (1/1) ... [2022-12-14 13:03:06,445 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:03:06" (1/1) ... [2022-12-14 13:03:06,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:03:06" (1/1) ... [2022-12-14 13:03:06,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:03:06,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:03:06,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:03:06,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:03:06,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:03:06" (1/1) ... [2022-12-14 13:03:06,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:03:06,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:03:06,473 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:03:06,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:03:06,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 13:03:06,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 13:03:06,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 13:03:06,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 13:03:06,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:03:06,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:03:06,572 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:03:06,574 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:03:06,785 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:03:06,822 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:03:06,822 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 13:03:06,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:03:06 BoogieIcfgContainer [2022-12-14 13:03:06,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:03:06,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:03:06,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:03:06,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:03:06,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:03:06" (1/3) ... [2022-12-14 13:03:06,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ff9c81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:03:06, skipping insertion in model container [2022-12-14 13:03:06,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:03:06" (2/3) ... [2022-12-14 13:03:06,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ff9c81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:03:06, skipping insertion in model container [2022-12-14 13:03:06,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:03:06" (3/3) ... [2022-12-14 13:03:06,832 INFO L112 eAbstractionObserver]: Analyzing ICFG strlcat.i [2022-12-14 13:03:06,846 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:03:06,846 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2022-12-14 13:03:06,878 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:03:06,883 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;@6c253c1f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:03:06,883 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2022-12-14 13:03:06,886 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 23 states have (on average 2.217391304347826) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:06,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 13:03:06,891 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:06,891 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 13:03:06,892 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-14 13:03:06,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:06,895 INFO L85 PathProgramCache]: Analyzing trace with hash 142492, now seen corresponding path program 1 times [2022-12-14 13:03:06,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:06,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227903860] [2022-12-14 13:03:06,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:06,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:07,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:07,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227903860] [2022-12-14 13:03:07,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227903860] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:03:07,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:03:07,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:03:07,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485878954] [2022-12-14 13:03:07,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:03:07,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:03:07,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:07,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:03:07,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:03:07,036 INFO L87 Difference]: Start difference. First operand has 41 states, 23 states have (on average 2.217391304347826) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 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) [2022-12-14 13:03:07,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:07,097 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2022-12-14 13:03:07,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:03:07,106 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 [2022-12-14 13:03:07,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:07,114 INFO L225 Difference]: With dead ends: 42 [2022-12-14 13:03:07,114 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 13:03:07,116 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 [2022-12-14 13:03:07,120 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:07,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 62 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:03:07,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 13:03:07,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-12-14 13:03:07,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 2.0) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:07,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-12-14 13:03:07,154 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 3 [2022-12-14 13:03:07,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:07,154 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-12-14 13:03:07,154 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) [2022-12-14 13:03:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-12-14 13:03:07,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 13:03:07,155 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:07,155 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 13:03:07,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:03:07,156 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-14 13:03:07,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:07,157 INFO L85 PathProgramCache]: Analyzing trace with hash 142454, now seen corresponding path program 1 times [2022-12-14 13:03:07,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:07,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916148374] [2022-12-14 13:03:07,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:07,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:07,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:07,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916148374] [2022-12-14 13:03:07,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916148374] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:03:07,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:03:07,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:03:07,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867350936] [2022-12-14 13:03:07,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:03:07,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:03:07,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:07,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:03:07,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:03:07,233 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:07,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:07,271 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-12-14 13:03:07,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:03:07,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 13:03:07,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:07,273 INFO L225 Difference]: With dead ends: 39 [2022-12-14 13:03:07,273 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 13:03:07,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:03:07,275 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:07,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 24 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:03:07,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 13:03:07,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-12-14 13:03:07,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:07,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-12-14 13:03:07,280 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 3 [2022-12-14 13:03:07,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:07,280 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-12-14 13:03:07,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:07,280 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-12-14 13:03:07,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 13:03:07,281 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:07,281 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 13:03:07,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 13:03:07,282 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-14 13:03:07,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:07,282 INFO L85 PathProgramCache]: Analyzing trace with hash 142455, now seen corresponding path program 1 times [2022-12-14 13:03:07,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:07,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340473284] [2022-12-14 13:03:07,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:07,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:07,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:07,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340473284] [2022-12-14 13:03:07,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340473284] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:03:07,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:03:07,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:03:07,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175046612] [2022-12-14 13:03:07,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:03:07,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:03:07,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:07,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:03:07,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:03:07,433 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:07,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:07,480 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-12-14 13:03:07,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:03:07,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 13:03:07,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:07,481 INFO L225 Difference]: With dead ends: 40 [2022-12-14 13:03:07,481 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 13:03:07,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:03:07,483 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 43 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:07,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 59 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:03:07,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 13:03:07,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2022-12-14 13:03:07,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 37 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) [2022-12-14 13:03:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-12-14 13:03:07,488 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 3 [2022-12-14 13:03:07,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:07,488 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-12-14 13:03:07,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:07,489 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-12-14 13:03:07,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 13:03:07,489 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:07,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 13:03:07,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 13:03:07,490 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-14 13:03:07,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:07,490 INFO L85 PathProgramCache]: Analyzing trace with hash 136997791, now seen corresponding path program 1 times [2022-12-14 13:03:07,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:07,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590509639] [2022-12-14 13:03:07,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:07,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:07,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:07,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:07,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590509639] [2022-12-14 13:03:07,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590509639] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:03:07,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:03:07,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:03:07,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57961666] [2022-12-14 13:03:07,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:03:07,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:03:07,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:07,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:03:07,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:03:07,547 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:07,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:07,577 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-12-14 13:03:07,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:03:07,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 13:03:07,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:07,578 INFO L225 Difference]: With dead ends: 37 [2022-12-14 13:03:07,578 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 13:03:07,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:03:07,579 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:07,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 25 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:03:07,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 13:03:07,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-12-14 13:03:07,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-12-14 13:03:07,583 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 5 [2022-12-14 13:03:07,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:07,583 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-12-14 13:03:07,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:07,584 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-12-14 13:03:07,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 13:03:07,584 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:07,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 13:03:07,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 13:03:07,584 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-14 13:03:07,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:07,585 INFO L85 PathProgramCache]: Analyzing trace with hash 136997792, now seen corresponding path program 1 times [2022-12-14 13:03:07,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:07,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995628870] [2022-12-14 13:03:07,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:07,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:07,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:07,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995628870] [2022-12-14 13:03:07,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995628870] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:03:07,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:03:07,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:03:07,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017459919] [2022-12-14 13:03:07,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:03:07,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:03:07,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:07,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:03:07,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:03:07,710 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:07,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:07,744 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-12-14 13:03:07,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:03:07,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 13:03:07,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:07,745 INFO L225 Difference]: With dead ends: 38 [2022-12-14 13:03:07,745 INFO L226 Difference]: Without dead ends: 38 [2022-12-14 13:03:07,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:03:07,746 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 39 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:07,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 27 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:03:07,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-14 13:03:07,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-12-14 13:03:07,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.826086956521739) internal successors, (42), 35 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) [2022-12-14 13:03:07,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-12-14 13:03:07,749 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 5 [2022-12-14 13:03:07,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:07,749 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-12-14 13:03:07,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:07,749 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-12-14 13:03:07,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 13:03:07,750 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:07,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 13:03:07,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 13:03:07,750 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-14 13:03:07,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:07,751 INFO L85 PathProgramCache]: Analyzing trace with hash 136997820, now seen corresponding path program 1 times [2022-12-14 13:03:07,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:07,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104696691] [2022-12-14 13:03:07,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:07,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:07,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:07,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104696691] [2022-12-14 13:03:07,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104696691] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:03:07,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:03:07,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:03:07,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798112011] [2022-12-14 13:03:07,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:03:07,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:03:07,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:07,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:03:07,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:03:07,811 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:07,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:07,848 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-12-14 13:03:07,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:03:07,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 13:03:07,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:07,850 INFO L225 Difference]: With dead ends: 37 [2022-12-14 13:03:07,850 INFO L226 Difference]: Without dead ends: 36 [2022-12-14 13:03:07,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:03:07,851 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:07,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:03:07,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-14 13:03:07,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-12-14 13:03:07,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:07,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-12-14 13:03:07,854 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 5 [2022-12-14 13:03:07,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:07,854 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-12-14 13:03:07,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:07,855 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-12-14 13:03:07,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 13:03:07,855 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:07,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 13:03:07,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 13:03:07,856 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-14 13:03:07,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:07,856 INFO L85 PathProgramCache]: Analyzing trace with hash -48032742, now seen corresponding path program 1 times [2022-12-14 13:03:07,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:07,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280201581] [2022-12-14 13:03:07,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:07,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:07,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:07,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:07,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:07,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280201581] [2022-12-14 13:03:07,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280201581] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:03:07,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:03:07,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:03:07,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95304533] [2022-12-14 13:03:07,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:03:07,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:03:07,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:07,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:03:07,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:03:07,953 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:07,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:07,996 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-12-14 13:03:07,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:03:07,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-12-14 13:03:07,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:07,997 INFO L225 Difference]: With dead ends: 34 [2022-12-14 13:03:07,997 INFO L226 Difference]: Without dead ends: 34 [2022-12-14 13:03:07,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:03:07,998 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 63 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:07,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 19 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:03:07,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-14 13:03:08,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-12-14 13:03:08,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:08,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-12-14 13:03:08,001 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 6 [2022-12-14 13:03:08,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:08,001 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-12-14 13:03:08,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:08,001 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-12-14 13:03:08,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 13:03:08,001 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:08,002 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 13:03:08,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 13:03:08,002 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-14 13:03:08,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:08,002 INFO L85 PathProgramCache]: Analyzing trace with hash -48032741, now seen corresponding path program 1 times [2022-12-14 13:03:08,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:08,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000844861] [2022-12-14 13:03:08,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:08,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:08,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:08,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000844861] [2022-12-14 13:03:08,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000844861] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:03:08,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:03:08,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:03:08,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14713701] [2022-12-14 13:03:08,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:03:08,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:03:08,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:08,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:03:08,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:03:08,150 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:08,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:08,261 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-12-14 13:03:08,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:03:08,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-12-14 13:03:08,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:08,262 INFO L225 Difference]: With dead ends: 55 [2022-12-14 13:03:08,262 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 13:03:08,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:03:08,263 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 200 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:08,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 27 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:03:08,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 13:03:08,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2022-12-14 13:03:08,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.6875) internal successors, (54), 42 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:08,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2022-12-14 13:03:08,266 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 6 [2022-12-14 13:03:08,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:08,266 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2022-12-14 13:03:08,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:08,266 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2022-12-14 13:03:08,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 13:03:08,267 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:08,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:03:08,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 13:03:08,267 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-14 13:03:08,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:08,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1085267725, now seen corresponding path program 1 times [2022-12-14 13:03:08,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:08,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293109390] [2022-12-14 13:03:08,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:08,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:08,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:08,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:08,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293109390] [2022-12-14 13:03:08,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293109390] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:03:08,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877197188] [2022-12-14 13:03:08,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:08,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:08,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:03:08,561 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:03:08,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:03:08,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:08,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 13:03:08,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:03:08,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:03:08,756 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:03:08,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 20 [2022-12-14 13:03:08,788 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:03:08,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 13:03:08,855 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 17 treesize of output 19 [2022-12-14 13:03:08,959 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:03:08,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-12-14 13:03:09,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:09,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:03:09,298 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:03:09,298 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-12-14 13:03:09,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:03:09,313 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-12-14 13:03:09,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:03:09,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:03:09,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2022-12-14 13:03:09,330 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 13:03:09,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-12-14 13:03:09,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:09,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877197188] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:03:09,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1643459473] [2022-12-14 13:03:09,353 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 13:03:09,353 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:03:09,357 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:03:09,361 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:03:09,361 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:03:09,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 13:03:09,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:03:09,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:09,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-14 13:03:09,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:09,459 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 25 treesize of output 24 [2022-12-14 13:03:09,929 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:03:11,547 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '769#(and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.base|) (<= |ULTIMATE.start_strlcat_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_strlcat_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~in~0#1.offset|) (<= 0 |ULTIMATE.start_strlcat_~src#1.base|) (<= 0 |ULTIMATE.start_strlcat_~d~0#1.base|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~out~0#1.offset| 0) (<= 0 |ULTIMATE.start_strlcat_~dst#1.base|) (<= 1 |ULTIMATE.start_strlcat_~siz#1|) (<= 1 |ULTIMATE.start_strlcat_~d~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc18#1.base|) (<= 0 |ULTIMATE.start_strlcat_~dst#1.offset|) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= |ULTIMATE.start_main_~out_len~0#1| 2147483647) (<= |ULTIMATE.start_strlcat_~s~0#1.offset| 0) (<= |#NULL.base| 0) (<= |ULTIMATE.start_strlcat_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~in~0#1.base|) (<= 0 |ULTIMATE.start_strlcat_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_strlcat_#in~siz#1|) (<= |ULTIMATE.start_strlcat_~n~0#1| 2147483647) (<= |ULTIMATE.start_strlcat_#in~dst#1.offset| 0) (<= |ULTIMATE.start_main_~in~0#1.offset| 0) (<= |ULTIMATE.start_strlcat_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_strlcat_#in~dst#1.base|) (<= 0 |ULTIMATE.start_strlcat_~src#1.offset|) (<= 0 |ULTIMATE.start_strlcat_#in~src#1.base|) (<= 0 |ULTIMATE.start_main_~out~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_strlcat_~s~0#1.offset|) (<= 0 |ULTIMATE.start_strlcat_~s~0#1.base|) (not (<= (+ |ULTIMATE.start_strlcat_~d~0#1.offset| 1) (select |#length| |ULTIMATE.start_strlcat_~d~0#1.base|))) (<= |ULTIMATE.start_main_#t~malloc18#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_strlcat_~src#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc18#1.offset|) (<= |ULTIMATE.start_strlcat_#in~src#1.offset| 0) (<= 1 |ULTIMATE.start_main_~in_len~0#1|) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 |ULTIMATE.start_main_~out~0#1.offset|) (<= 1 |ULTIMATE.start_main_~out_len~0#1|))' at error location [2022-12-14 13:03:11,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:03:11,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:03:11,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-14 13:03:11,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311505215] [2022-12-14 13:03:11,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:03:11,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 13:03:11,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:11,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 13:03:11,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-12-14 13:03:11,549 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:12,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:12,421 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2022-12-14 13:03:12,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 13:03:12,421 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 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 8 [2022-12-14 13:03:12,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:12,422 INFO L225 Difference]: With dead ends: 98 [2022-12-14 13:03:12,422 INFO L226 Difference]: Without dead ends: 98 [2022-12-14 13:03:12,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 13:03:12,423 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 674 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:12,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [674 Valid, 184 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:03:12,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-12-14 13:03:12,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 42. [2022-12-14 13:03:12,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:12,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-12-14 13:03:12,426 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 8 [2022-12-14 13:03:12,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:12,426 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-12-14 13:03:12,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:12,426 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-12-14 13:03:12,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 13:03:12,427 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:12,427 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:03:12,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:03:12,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:12,629 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-14 13:03:12,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:12,630 INFO L85 PathProgramCache]: Analyzing trace with hash -734811099, now seen corresponding path program 1 times [2022-12-14 13:03:12,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:12,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946427474] [2022-12-14 13:03:12,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:12,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:12,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:12,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946427474] [2022-12-14 13:03:12,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946427474] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:03:12,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:03:12,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:03:12,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886273512] [2022-12-14 13:03:12,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:03:12,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:03:12,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:12,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:03:12,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:03:12,676 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:12,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:12,714 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-12-14 13:03:12,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:03:12,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 13:03:12,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:12,715 INFO L225 Difference]: With dead ends: 40 [2022-12-14 13:03:12,715 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 13:03:12,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:03:12,716 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:12,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 20 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:03:12,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 13:03:12,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-12-14 13:03:12,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:12,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-12-14 13:03:12,718 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 10 [2022-12-14 13:03:12,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:12,718 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-12-14 13:03:12,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:12,719 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-12-14 13:03:12,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 13:03:12,719 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:12,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:03:12,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 13:03:12,719 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-14 13:03:12,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:12,719 INFO L85 PathProgramCache]: Analyzing trace with hash -734811098, now seen corresponding path program 1 times [2022-12-14 13:03:12,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:12,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041477126] [2022-12-14 13:03:12,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:12,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:12,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:12,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041477126] [2022-12-14 13:03:12,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041477126] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:03:12,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:03:12,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:03:12,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987856074] [2022-12-14 13:03:12,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:03:12,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:03:12,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:12,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:03:12,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:03:12,811 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:12,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:12,849 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-12-14 13:03:12,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:03:12,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 13:03:12,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:12,850 INFO L225 Difference]: With dead ends: 53 [2022-12-14 13:03:12,850 INFO L226 Difference]: Without dead ends: 53 [2022-12-14 13:03:12,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:03:12,851 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 70 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:12,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 30 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:03:12,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-14 13:03:12,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2022-12-14 13:03:12,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 43 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:12,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2022-12-14 13:03:12,855 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 10 [2022-12-14 13:03:12,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:12,855 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2022-12-14 13:03:12,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:12,855 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2022-12-14 13:03:12,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 13:03:12,855 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:12,856 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 13:03:12,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 13:03:12,856 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-14 13:03:12,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:12,856 INFO L85 PathProgramCache]: Analyzing trace with hash -734677633, now seen corresponding path program 2 times [2022-12-14 13:03:12,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:12,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989964804] [2022-12-14 13:03:12,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:12,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:13,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:13,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:13,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989964804] [2022-12-14 13:03:13,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989964804] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:03:13,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371812298] [2022-12-14 13:03:13,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:03:13,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:13,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:03:13,255 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:03:13,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:03:13,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:03:13,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:03:13,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 13:03:13,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:03:13,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:03:13,384 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:03:13,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 20 [2022-12-14 13:03:13,404 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:03:13,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 13:03:13,471 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 17 treesize of output 19 [2022-12-14 13:03:14,494 INFO L321 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-12-14 13:03:14,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 33 [2022-12-14 13:03:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:14,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:03:15,090 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:03:15,090 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 86 [2022-12-14 13:03:15,109 INFO L321 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2022-12-14 13:03:15,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 134 treesize of output 113 [2022-12-14 13:03:15,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 118 [2022-12-14 13:03:15,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 105 [2022-12-14 13:03:15,141 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:03:15,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 130 [2022-12-14 13:03:15,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 95 [2022-12-14 13:03:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:15,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371812298] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:03:15,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1951805398] [2022-12-14 13:03:15,243 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 13:03:15,243 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:03:15,243 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:03:15,243 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:03:15,243 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:03:15,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 13:03:15,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:03:15,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:15,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-14 13:03:15,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:15,306 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 25 treesize of output 24 [2022-12-14 13:03:15,603 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:03:17,167 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1208#(and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.base|) (<= |ULTIMATE.start_strlcat_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_strlcat_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~in~0#1.offset|) (<= 0 |ULTIMATE.start_strlcat_~src#1.base|) (<= 0 |ULTIMATE.start_strlcat_~d~0#1.base|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~out~0#1.offset| 0) (<= 0 |ULTIMATE.start_strlcat_~dst#1.base|) (<= 1 |ULTIMATE.start_strlcat_~siz#1|) (<= 1 |ULTIMATE.start_strlcat_~d~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc18#1.base|) (<= 0 |ULTIMATE.start_strlcat_~dst#1.offset|) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= |ULTIMATE.start_main_~out_len~0#1| 2147483647) (<= |ULTIMATE.start_strlcat_~s~0#1.offset| 0) (<= |#NULL.base| 0) (<= |ULTIMATE.start_strlcat_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~in~0#1.base|) (<= 0 |ULTIMATE.start_strlcat_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_strlcat_#in~siz#1|) (<= |ULTIMATE.start_strlcat_~n~0#1| 2147483647) (<= |ULTIMATE.start_strlcat_#in~dst#1.offset| 0) (<= |ULTIMATE.start_main_~in~0#1.offset| 0) (<= |ULTIMATE.start_strlcat_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_strlcat_#in~dst#1.base|) (<= 0 |ULTIMATE.start_strlcat_~src#1.offset|) (<= 0 |ULTIMATE.start_strlcat_#in~src#1.base|) (<= 0 |ULTIMATE.start_main_~out~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_strlcat_~s~0#1.offset|) (<= 0 |ULTIMATE.start_strlcat_~s~0#1.base|) (not (<= (+ |ULTIMATE.start_strlcat_~d~0#1.offset| 1) (select |#length| |ULTIMATE.start_strlcat_~d~0#1.base|))) (<= |ULTIMATE.start_main_#t~malloc18#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_strlcat_~src#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc18#1.offset|) (<= |ULTIMATE.start_strlcat_#in~src#1.offset| 0) (<= 1 |ULTIMATE.start_main_~in_len~0#1|) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 |ULTIMATE.start_main_~out~0#1.offset|) (<= 1 |ULTIMATE.start_main_~out_len~0#1|))' at error location [2022-12-14 13:03:17,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:03:17,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:03:17,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2022-12-14 13:03:17,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378806296] [2022-12-14 13:03:17,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:03:17,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 13:03:17,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:17,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 13:03:17,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=820, Unknown=1, NotChecked=0, Total=930 [2022-12-14 13:03:17,170 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:31,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:03:37,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:37,570 INFO L93 Difference]: Finished difference Result 110 states and 129 transitions. [2022-12-14 13:03:37,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 13:03:37,571 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 13:03:37,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:37,572 INFO L225 Difference]: With dead ends: 110 [2022-12-14 13:03:37,572 INFO L226 Difference]: Without dead ends: 110 [2022-12-14 13:03:37,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=580, Invalid=2381, Unknown=9, NotChecked=0, Total=2970 [2022-12-14 13:03:37,573 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 710 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 31 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:37,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [710 Valid, 266 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 488 Invalid, 2 Unknown, 0 Unchecked, 3.3s Time] [2022-12-14 13:03:37,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-12-14 13:03:37,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 40. [2022-12-14 13:03:37,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.5625) internal successors, (50), 39 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) [2022-12-14 13:03:37,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-12-14 13:03:37,576 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 10 [2022-12-14 13:03:37,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:37,576 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-12-14 13:03:37,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:37,576 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-12-14 13:03:37,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 13:03:37,577 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:37,577 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:03:37,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:03:37,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 13:03:37,779 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-14 13:03:37,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:37,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1304333356, now seen corresponding path program 1 times [2022-12-14 13:03:37,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:37,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116820377] [2022-12-14 13:03:37,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:37,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:37,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:37,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116820377] [2022-12-14 13:03:37,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116820377] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:03:37,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:03:37,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:03:37,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059827920] [2022-12-14 13:03:37,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:03:37,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:03:37,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:37,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:03:37,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:03:37,826 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) 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) [2022-12-14 13:03:37,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:37,856 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-12-14 13:03:37,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:03:37,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) 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 11 [2022-12-14 13:03:37,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:37,857 INFO L225 Difference]: With dead ends: 40 [2022-12-14 13:03:37,857 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 13:03:37,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:03:37,857 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:37,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 26 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:03:37,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 13:03:37,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-12-14 13:03:37,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.53125) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:37,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2022-12-14 13:03:37,859 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 11 [2022-12-14 13:03:37,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:37,859 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2022-12-14 13:03:37,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) 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) [2022-12-14 13:03:37,859 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2022-12-14 13:03:37,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 13:03:37,859 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:37,860 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:03:37,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 13:03:37,860 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-14 13:03:37,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:37,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1304333355, now seen corresponding path program 1 times [2022-12-14 13:03:37,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:37,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976303632] [2022-12-14 13:03:37,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:37,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:37,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:37,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976303632] [2022-12-14 13:03:37,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976303632] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:03:37,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:03:37,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:03:37,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790466607] [2022-12-14 13:03:37,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:03:37,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:03:37,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:37,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:03:37,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:03:37,961 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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) [2022-12-14 13:03:38,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:38,034 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-12-14 13:03:38,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:03:38,034 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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 11 [2022-12-14 13:03:38,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:38,034 INFO L225 Difference]: With dead ends: 55 [2022-12-14 13:03:38,035 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 13:03:38,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:03:38,035 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 88 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:38,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 37 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:03:38,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 13:03:38,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2022-12-14 13:03:38,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 39 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) [2022-12-14 13:03:38,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-12-14 13:03:38,038 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 11 [2022-12-14 13:03:38,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:38,038 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-12-14 13:03:38,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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) [2022-12-14 13:03:38,038 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-12-14 13:03:38,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 13:03:38,039 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:38,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:03:38,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 13:03:38,039 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-14 13:03:38,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:38,040 INFO L85 PathProgramCache]: Analyzing trace with hash 666052614, now seen corresponding path program 1 times [2022-12-14 13:03:38,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:38,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743262047] [2022-12-14 13:03:38,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:38,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:38,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:38,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743262047] [2022-12-14 13:03:38,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743262047] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:03:38,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:03:38,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:03:38,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772273869] [2022-12-14 13:03:38,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:03:38,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:03:38,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:38,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:03:38,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:03:38,103 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:38,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:38,134 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-12-14 13:03:38,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:03:38,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 [2022-12-14 13:03:38,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:38,135 INFO L225 Difference]: With dead ends: 43 [2022-12-14 13:03:38,135 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 13:03:38,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:03:38,136 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:38,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 38 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:03:38,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 13:03:38,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-12-14 13:03:38,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:38,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-12-14 13:03:38,139 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 13 [2022-12-14 13:03:38,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:38,139 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-12-14 13:03:38,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:38,139 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-12-14 13:03:38,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 13:03:38,140 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:38,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:03:38,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 13:03:38,140 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-14 13:03:38,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:38,140 INFO L85 PathProgramCache]: Analyzing trace with hash 666097946, now seen corresponding path program 1 times [2022-12-14 13:03:38,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:38,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562943340] [2022-12-14 13:03:38,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:38,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:38,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:38,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562943340] [2022-12-14 13:03:38,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562943340] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:03:38,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868037673] [2022-12-14 13:03:38,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:38,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:38,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:03:38,370 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:03:38,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:03:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:38,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 13:03:38,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:03:38,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:03:38,548 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:03:38,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 13:03:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:38,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:03:38,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-12-14 13:03:38,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:03:38,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 13:03:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:38,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868037673] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:03:38,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [41115195] [2022-12-14 13:03:38,772 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 13:03:38,772 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:03:38,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:03:38,773 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:03:38,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:03:38,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 13:03:38,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:03:38,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:38,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-14 13:03:38,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:38,843 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 25 treesize of output 24 [2022-12-14 13:03:38,959 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:03:40,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [41115195] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:03:40,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:03:40,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 6, 6] total 25 [2022-12-14 13:03:40,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652473577] [2022-12-14 13:03:40,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:03:40,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 13:03:40,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:40,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 13:03:40,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-12-14 13:03:40,748 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:40,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:40,977 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-12-14 13:03:40,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 13:03:40,977 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 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 [2022-12-14 13:03:40,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:40,978 INFO L225 Difference]: With dead ends: 58 [2022-12-14 13:03:40,978 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 13:03:40,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-12-14 13:03:40,979 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:40,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 42 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:03:40,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 13:03:40,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2022-12-14 13:03:40,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 34 states have (on average 1.411764705882353) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:40,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2022-12-14 13:03:40,980 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 13 [2022-12-14 13:03:40,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:40,981 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2022-12-14 13:03:40,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:40,981 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-12-14 13:03:40,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 13:03:40,981 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:40,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:03:40,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 13:03:41,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 13:03:41,183 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-14 13:03:41,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:41,184 INFO L85 PathProgramCache]: Analyzing trace with hash -56582691, now seen corresponding path program 1 times [2022-12-14 13:03:41,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:41,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004524669] [2022-12-14 13:03:41,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:41,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:41,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:41,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004524669] [2022-12-14 13:03:41,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004524669] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:03:41,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130294113] [2022-12-14 13:03:41,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:41,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:41,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:03:41,353 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:03:41,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:03:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:41,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 13:03:41,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:03:41,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:03:41,504 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:03:41,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 13:03:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:41,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:03:41,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-12-14 13:03:41,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:03:41,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 13:03:41,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:41,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130294113] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:03:41,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [463651176] [2022-12-14 13:03:41,683 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 13:03:41,683 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:03:41,683 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:03:41,683 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:03:41,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:03:41,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 13:03:41,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:03:41,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:41,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-14 13:03:41,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:41,758 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 25 treesize of output 24 [2022-12-14 13:03:41,940 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:03:44,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [463651176] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:03:44,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:03:44,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6, 6, 6] total 25 [2022-12-14 13:03:44,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399725509] [2022-12-14 13:03:44,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:03:44,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 13:03:44,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:44,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 13:03:44,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-12-14 13:03:44,419 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:44,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:44,729 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2022-12-14 13:03:44,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 13:03:44,730 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-12-14 13:03:44,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:44,730 INFO L225 Difference]: With dead ends: 50 [2022-12-14 13:03:44,730 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 13:03:44,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-12-14 13:03:44,731 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:44,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 43 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:03:44,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 13:03:44,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-12-14 13:03:44,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:44,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-12-14 13:03:44,733 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 14 [2022-12-14 13:03:44,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:44,734 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-12-14 13:03:44,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:44,734 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-12-14 13:03:44,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 13:03:44,734 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:44,734 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:03:44,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 13:03:44,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 13:03:44,936 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-14 13:03:44,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:44,937 INFO L85 PathProgramCache]: Analyzing trace with hash -56591637, now seen corresponding path program 1 times [2022-12-14 13:03:44,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:44,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376410600] [2022-12-14 13:03:44,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:44,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:44,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:44,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376410600] [2022-12-14 13:03:44,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376410600] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:03:44,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:03:44,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:03:44,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413523481] [2022-12-14 13:03:44,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:03:44,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:03:44,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:44,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:03:45,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:03:45,000 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:45,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:45,033 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2022-12-14 13:03:45,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:03:45,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-12-14 13:03:45,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:45,034 INFO L225 Difference]: With dead ends: 43 [2022-12-14 13:03:45,034 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 13:03:45,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:03:45,034 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:45,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 26 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:03:45,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 13:03:45,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-12-14 13:03:45,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 42 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) [2022-12-14 13:03:45,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-12-14 13:03:45,036 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 14 [2022-12-14 13:03:45,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:45,036 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-12-14 13:03:45,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:45,036 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-12-14 13:03:45,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 13:03:45,037 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:45,037 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:03:45,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 13:03:45,037 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-14 13:03:45,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:45,037 INFO L85 PathProgramCache]: Analyzing trace with hash -56591636, now seen corresponding path program 1 times [2022-12-14 13:03:45,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:45,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938831948] [2022-12-14 13:03:45,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:45,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:45,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:45,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938831948] [2022-12-14 13:03:45,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938831948] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:03:45,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:03:45,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:03:45,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927387284] [2022-12-14 13:03:45,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:03:45,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:03:45,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:45,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:03:45,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:03:45,101 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:45,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:45,152 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-12-14 13:03:45,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:03:45,152 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-12-14 13:03:45,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:45,153 INFO L225 Difference]: With dead ends: 45 [2022-12-14 13:03:45,153 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 13:03:45,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:03:45,153 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 36 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:45,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 46 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:03:45,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 13:03:45,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-12-14 13:03:45,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:45,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-12-14 13:03:45,155 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 14 [2022-12-14 13:03:45,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:45,155 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-12-14 13:03:45,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:45,155 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-12-14 13:03:45,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 13:03:45,155 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:45,155 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:03:45,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 13:03:45,155 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-14 13:03:45,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:45,156 INFO L85 PathProgramCache]: Analyzing trace with hash -286508568, now seen corresponding path program 1 times [2022-12-14 13:03:45,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:45,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251003671] [2022-12-14 13:03:45,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:45,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:45,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:03:45,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:45,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251003671] [2022-12-14 13:03:45,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251003671] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:03:45,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387413704] [2022-12-14 13:03:45,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:45,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:45,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:03:45,339 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:03:45,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:03:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:45,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 13:03:45,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:03:45,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:03:45,518 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:03:45,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 13:03:45,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:03:45,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:03:45,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-12-14 13:03:45,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:03:45,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 13:03:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:03:45,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387413704] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:03:45,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [18136440] [2022-12-14 13:03:45,718 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 13:03:45,718 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:03:45,718 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:03:45,718 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:03:45,718 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:03:45,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 13:03:45,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:03:45,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:45,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-14 13:03:45,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:45,784 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 25 treesize of output 24 [2022-12-14 13:03:46,151 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:03:48,834 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2380#(and (or (and (<= |ULTIMATE.start_strlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.base|) (<= |ULTIMATE.start_strlcat_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_strlcat_#in~src#1.offset|) (<= 0 |ULTIMATE.start_strlen_#in~s#1.base|) (<= 0 |ULTIMATE.start_strlen_~s#1.base|) (<= 0 |ULTIMATE.start_main_~in~0#1.offset|) (<= 0 |ULTIMATE.start_strlcat_~src#1.base|) (<= 0 |ULTIMATE.start_strlcat_~d~0#1.base|) (<= 0 |ULTIMATE.start_strlen_#in~s#1.offset|) (<= |ULTIMATE.start_main_~out~0#1.offset| 0) (<= 0 |ULTIMATE.start_strlcat_~dst#1.base|) (<= 1 |ULTIMATE.start_strlcat_~siz#1|) (<= 0 |ULTIMATE.start_strlcat_~dlen~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc18#1.base|) (<= 1 |ULTIMATE.start_strlen_~i~0#1|) (<= 0 |ULTIMATE.start_strlcat_~dst#1.offset|) (<= 1 |ULTIMATE.start_strlen_~s#1.offset|) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= |ULTIMATE.start_main_~out_len~0#1| 2147483647) (<= |ULTIMATE.start_strlcat_~s~0#1.offset| 0) (<= |ULTIMATE.start_strlcat_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~in~0#1.base|) (<= 0 |ULTIMATE.start_strlcat_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_strlcat_#in~siz#1|) (<= |ULTIMATE.start_strlcat_~n~0#1| 2147483647) (<= |ULTIMATE.start_strlcat_#in~dst#1.offset| 0) (<= |ULTIMATE.start_main_~in~0#1.offset| 0) (<= |ULTIMATE.start_strlcat_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_strlcat_#in~dst#1.base|) (<= 0 |ULTIMATE.start_strlcat_~src#1.offset|) (<= 0 |ULTIMATE.start_strlcat_#in~src#1.base|) (<= 0 |ULTIMATE.start_strlcat_~d~0#1.offset|) (<= 0 |ULTIMATE.start_main_~out~0#1.base|) (<= 0 |ULTIMATE.start_strlcat_~s~0#1.offset|) (<= 0 |ULTIMATE.start_strlcat_~s~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_strlcat_~src#1.offset| 0) (<= |ULTIMATE.start_strlcat_#in~src#1.offset| 0) (<= 1 |ULTIMATE.start_main_~in_len~0#1|) (<= 0 |ULTIMATE.start_main_~out~0#1.offset|) (<= 1 |ULTIMATE.start_main_~out_len~0#1|)) (and (<= |ULTIMATE.start_strlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_strlen_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.base|) (<= |ULTIMATE.start_strlcat_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_strlcat_#in~src#1.offset|) (<= 0 |ULTIMATE.start_strlen_#in~s#1.base|) (<= 0 |ULTIMATE.start_strlen_~s#1.base|) (<= 0 |ULTIMATE.start_main_~in~0#1.offset|) (<= 0 |ULTIMATE.start_strlcat_~src#1.base|) (<= 0 |ULTIMATE.start_strlcat_~d~0#1.base|) (<= 0 |ULTIMATE.start_strlen_#in~s#1.offset|) (<= |ULTIMATE.start_main_~out~0#1.offset| 0) (<= 0 |ULTIMATE.start_strlcat_~dst#1.base|) (<= 1 |ULTIMATE.start_strlcat_~siz#1|) (<= 0 |ULTIMATE.start_strlcat_~dlen~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc18#1.base|) (<= 0 |ULTIMATE.start_strlcat_~dst#1.offset|) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= |ULTIMATE.start_main_~out_len~0#1| 2147483647) (<= |ULTIMATE.start_strlcat_~s~0#1.offset| 0) (<= |ULTIMATE.start_strlcat_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~in~0#1.base|) (<= 0 |ULTIMATE.start_strlcat_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_strlcat_#in~siz#1|) (<= |ULTIMATE.start_strlcat_~n~0#1| 2147483647) (<= |ULTIMATE.start_strlcat_#in~dst#1.offset| 0) (<= |ULTIMATE.start_main_~in~0#1.offset| 0) (<= |ULTIMATE.start_strlen_~i~0#1| 0) (<= |ULTIMATE.start_strlcat_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_strlcat_#in~dst#1.base|) (<= 0 |ULTIMATE.start_strlcat_~src#1.offset|) (<= 0 |ULTIMATE.start_strlcat_#in~src#1.base|) (<= 0 |ULTIMATE.start_strlcat_~d~0#1.offset|) (<= 0 |ULTIMATE.start_main_~out~0#1.base|) (<= 0 |ULTIMATE.start_strlcat_~s~0#1.offset|) (<= 0 |ULTIMATE.start_strlcat_~s~0#1.base|) (<= 0 |ULTIMATE.start_strlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_strlcat_~src#1.offset| 0) (<= |ULTIMATE.start_strlcat_#in~src#1.offset| 0) (<= 1 |ULTIMATE.start_main_~in_len~0#1|) (<= |ULTIMATE.start_strlen_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~out~0#1.offset|) (<= 1 |ULTIMATE.start_main_~out_len~0#1|))) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (not (<= (+ |ULTIMATE.start_strlen_~s#1.offset| 1) (select |#length| |ULTIMATE.start_strlen_~s#1.base|))) (= |ULTIMATE.start_main_#t~malloc18#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:03:48,834 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:03:48,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:03:48,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-12-14 13:03:48,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567468500] [2022-12-14 13:03:48,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:03:48,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 13:03:48,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:48,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 13:03:48,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-12-14 13:03:48,836 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:49,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:49,223 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-12-14 13:03:49,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:03:49,223 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 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 15 [2022-12-14 13:03:49,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:49,224 INFO L225 Difference]: With dead ends: 51 [2022-12-14 13:03:49,224 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 13:03:49,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2022-12-14 13:03:49,225 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 111 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:49,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 81 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:03:49,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 13:03:49,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2022-12-14 13:03:49,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:49,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-12-14 13:03:49,227 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 15 [2022-12-14 13:03:49,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:49,227 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-12-14 13:03:49,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:49,228 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-12-14 13:03:49,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 13:03:49,228 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:49,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:03:49,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 13:03:49,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:49,430 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-14 13:03:49,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:49,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1450039794, now seen corresponding path program 1 times [2022-12-14 13:03:49,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:49,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154431746] [2022-12-14 13:03:49,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:49,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:49,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:49,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154431746] [2022-12-14 13:03:49,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154431746] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:03:49,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617454245] [2022-12-14 13:03:49,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:49,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:49,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:03:49,721 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:03:49,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:03:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:49,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 13:03:49,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:03:49,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:03:49,859 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:03:49,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 13:03:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:49,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:03:50,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-12-14 13:03:50,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:03:50,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 13:03:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:50,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617454245] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:03:50,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1138119306] [2022-12-14 13:03:50,019 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 13:03:50,019 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:03:50,019 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:03:50,019 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:03:50,019 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:03:50,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 13:03:50,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:03:50,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:50,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-14 13:03:50,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:50,071 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 25 treesize of output 24 [2022-12-14 13:03:50,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:50,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:03:50,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:50,243 INFO L321 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2022-12-14 13:03:50,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 62 [2022-12-14 13:03:50,344 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 [2022-12-14 13:03:50,441 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 [2022-12-14 13:03:50,529 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:03:52,852 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2607#(and (<= 0 |ULTIMATE.start_main_#t~malloc16#1.base|) (<= |ULTIMATE.start_strlcat_#in~siz#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 |ULTIMATE.start_strlcat_#in~src#1.offset|) (<= 0 |ULTIMATE.start_main_~in~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc18#1.offset| 0) (<= 0 |ULTIMATE.start_strlcat_~src#1.base|) (<= 0 |ULTIMATE.start_strlcat_~d~0#1.base|) (<= |ULTIMATE.start_strlcat_~dlen~0#1| 0) (<= |ULTIMATE.start_main_~out~0#1.offset| 0) (<= 0 |ULTIMATE.start_strlcat_~dst#1.base|) (<= 1 |ULTIMATE.start_strlcat_~siz#1|) (<= 0 |ULTIMATE.start_strlcat_~dlen~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc18#1.base|) (<= 0 |ULTIMATE.start_strlcat_~dst#1.offset|) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= |ULTIMATE.start_main_~out_len~0#1| 2147483647) (<= |ULTIMATE.start_strlcat_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~in~0#1.base|) (<= 0 |ULTIMATE.start_strlcat_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_strlcat_#in~siz#1|) (<= |ULTIMATE.start_strlcat_~n~0#1| 2147483647) (<= |ULTIMATE.start_strlcat_#in~dst#1.offset| 0) (<= |ULTIMATE.start_main_~in~0#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_strlcat_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_strlcat_#in~dst#1.base|) (<= 0 |ULTIMATE.start_strlcat_~src#1.offset|) (< (select |#length| |ULTIMATE.start_strlcat_~s~0#1.base|) (+ |ULTIMATE.start_strlcat_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_strlcat_#in~src#1.base|) (<= 0 |ULTIMATE.start_strlcat_~d~0#1.offset|) (<= 0 |ULTIMATE.start_main_~out~0#1.base|) (<= 0 |ULTIMATE.start_strlcat_~s~0#1.offset|) (<= 0 |ULTIMATE.start_strlcat_~s~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_strlcat_~src#1.offset| 0) (<= |ULTIMATE.start_strlcat_#in~src#1.offset| 0) (<= 1 |ULTIMATE.start_main_~in_len~0#1|) (<= 0 |ULTIMATE.start_main_~out~0#1.offset|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~out_len~0#1|))' at error location [2022-12-14 13:03:52,853 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:03:52,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:03:52,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 17 [2022-12-14 13:03:52,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311308297] [2022-12-14 13:03:52,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:03:52,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 13:03:52,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:52,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 13:03:52,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2022-12-14 13:03:52,854 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 18 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) [2022-12-14 13:03:53,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:53,375 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2022-12-14 13:03:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 13:03:53,375 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 18 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) Word has length 16 [2022-12-14 13:03:53,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:53,376 INFO L225 Difference]: With dead ends: 67 [2022-12-14 13:03:53,376 INFO L226 Difference]: Without dead ends: 67 [2022-12-14 13:03:53,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=364, Invalid=1616, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 13:03:53,377 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 258 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:53,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 60 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:03:53,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-12-14 13:03:53,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2022-12-14 13:03:53,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-12-14 13:03:53,379 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 16 [2022-12-14 13:03:53,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:53,379 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-12-14 13:03:53,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 18 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) [2022-12-14 13:03:53,379 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-12-14 13:03:53,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 13:03:53,379 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:53,379 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:03:53,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 13:03:53,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:53,581 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-14 13:03:53,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:53,582 INFO L85 PathProgramCache]: Analyzing trace with hash 477377502, now seen corresponding path program 1 times [2022-12-14 13:03:53,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:53,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097841986] [2022-12-14 13:03:53,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:53,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:53,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:53,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:53,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097841986] [2022-12-14 13:03:53,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097841986] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:03:53,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968826739] [2022-12-14 13:03:53,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:53,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:53,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:03:53,694 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:03:53,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:03:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:53,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 13:03:53,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:03:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:53,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:03:53,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968826739] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:03:53,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:03:53,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-12-14 13:03:53,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755652193] [2022-12-14 13:03:53,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:03:53,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:03:53,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:53,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:03:53,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:03:53,789 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:53,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:53,832 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2022-12-14 13:03:53,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:03:53,832 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-12-14 13:03:53,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:53,833 INFO L225 Difference]: With dead ends: 54 [2022-12-14 13:03:53,833 INFO L226 Difference]: Without dead ends: 54 [2022-12-14 13:03:53,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:03:53,833 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:53,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 44 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:03:53,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-14 13:03:53,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2022-12-14 13:03:53,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:53,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2022-12-14 13:03:53,835 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 16 [2022-12-14 13:03:53,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:53,836 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2022-12-14 13:03:53,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:53,836 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2022-12-14 13:03:53,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 13:03:53,836 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:53,836 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:03:53,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:03:54,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:54,037 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-14 13:03:54,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:54,038 INFO L85 PathProgramCache]: Analyzing trace with hash -456825235, now seen corresponding path program 2 times [2022-12-14 13:03:54,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:54,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063588306] [2022-12-14 13:03:54,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:54,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:54,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:54,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063588306] [2022-12-14 13:03:54,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063588306] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:03:54,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209120969] [2022-12-14 13:03:54,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:03:54,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:54,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:03:54,400 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:03:54,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:03:54,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:03:54,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:03:54,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 13:03:54,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:03:54,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:03:54,705 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-12-14 13:03:54,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 10 [2022-12-14 13:03:54,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:03:54,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:03:54,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-12-14 13:03:54,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-14 13:03:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:03:54,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209120969] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:03:54,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [888069957] [2022-12-14 13:03:54,918 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 13:03:54,918 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:03:54,918 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:03:54,918 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:03:54,918 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:03:54,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 13:03:54,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:03:54,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:54,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-14 13:03:54,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:54,989 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 25 treesize of output 24 [2022-12-14 13:03:55,337 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:03:57,856 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3045#(and (or (and (<= |ULTIMATE.start_strlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.base|) (<= |ULTIMATE.start_strlcat_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_strlcat_#in~src#1.offset|) (<= 0 |ULTIMATE.start_strlen_#in~s#1.base|) (<= 0 |ULTIMATE.start_strlen_~s#1.base|) (<= 0 |ULTIMATE.start_main_~in~0#1.offset|) (<= 0 |ULTIMATE.start_strlcat_~src#1.base|) (<= 0 |ULTIMATE.start_strlcat_~d~0#1.base|) (<= 0 |ULTIMATE.start_strlen_#in~s#1.offset|) (<= |ULTIMATE.start_main_~out~0#1.offset| 0) (<= 0 |ULTIMATE.start_strlcat_~dst#1.base|) (<= 1 |ULTIMATE.start_strlcat_~siz#1|) (<= 0 |ULTIMATE.start_strlcat_~dlen~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc18#1.base|) (<= 1 |ULTIMATE.start_strlen_~i~0#1|) (<= 0 |ULTIMATE.start_strlcat_~dst#1.offset|) (<= 1 |ULTIMATE.start_strlen_~s#1.offset|) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= |ULTIMATE.start_main_~out_len~0#1| 2147483647) (<= |ULTIMATE.start_strlcat_~s~0#1.offset| 0) (<= |ULTIMATE.start_strlcat_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~in~0#1.base|) (<= 0 |ULTIMATE.start_strlcat_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_strlcat_#in~siz#1|) (<= |ULTIMATE.start_strlcat_~n~0#1| 2147483647) (<= |ULTIMATE.start_strlcat_#in~dst#1.offset| 0) (<= |ULTIMATE.start_main_~in~0#1.offset| 0) (<= |ULTIMATE.start_strlcat_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_strlcat_#in~dst#1.base|) (<= 0 |ULTIMATE.start_strlcat_~src#1.offset|) (<= 0 |ULTIMATE.start_strlcat_#in~src#1.base|) (<= 0 |ULTIMATE.start_strlcat_~d~0#1.offset|) (<= 0 |ULTIMATE.start_main_~out~0#1.base|) (<= 0 |ULTIMATE.start_strlcat_~s~0#1.offset|) (<= 0 |ULTIMATE.start_strlcat_~s~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_strlcat_~src#1.offset| 0) (<= |ULTIMATE.start_strlcat_#in~src#1.offset| 0) (<= 1 |ULTIMATE.start_main_~in_len~0#1|) (<= 0 |ULTIMATE.start_main_~out~0#1.offset|) (<= 1 |ULTIMATE.start_main_~out_len~0#1|)) (and (<= |ULTIMATE.start_strlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_strlen_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.base|) (<= |ULTIMATE.start_strlcat_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_strlcat_#in~src#1.offset|) (<= 0 |ULTIMATE.start_strlen_#in~s#1.base|) (<= 0 |ULTIMATE.start_strlen_~s#1.base|) (<= 0 |ULTIMATE.start_main_~in~0#1.offset|) (<= 0 |ULTIMATE.start_strlcat_~src#1.base|) (<= 0 |ULTIMATE.start_strlcat_~d~0#1.base|) (<= 0 |ULTIMATE.start_strlen_#in~s#1.offset|) (<= |ULTIMATE.start_main_~out~0#1.offset| 0) (<= 0 |ULTIMATE.start_strlcat_~dst#1.base|) (<= 1 |ULTIMATE.start_strlcat_~siz#1|) (<= 0 |ULTIMATE.start_strlcat_~dlen~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc18#1.base|) (<= 0 |ULTIMATE.start_strlcat_~dst#1.offset|) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= |ULTIMATE.start_main_~out_len~0#1| 2147483647) (<= |ULTIMATE.start_strlcat_~s~0#1.offset| 0) (<= |ULTIMATE.start_strlcat_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~in~0#1.base|) (<= 0 |ULTIMATE.start_strlcat_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_strlcat_#in~siz#1|) (<= |ULTIMATE.start_strlcat_~n~0#1| 2147483647) (<= |ULTIMATE.start_strlcat_#in~dst#1.offset| 0) (<= |ULTIMATE.start_main_~in~0#1.offset| 0) (<= |ULTIMATE.start_strlen_~i~0#1| 0) (<= |ULTIMATE.start_strlcat_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_strlcat_#in~dst#1.base|) (<= 0 |ULTIMATE.start_strlcat_~src#1.offset|) (<= 0 |ULTIMATE.start_strlcat_#in~src#1.base|) (<= 0 |ULTIMATE.start_strlcat_~d~0#1.offset|) (<= 0 |ULTIMATE.start_main_~out~0#1.base|) (<= 0 |ULTIMATE.start_strlcat_~s~0#1.offset|) (<= 0 |ULTIMATE.start_strlcat_~s~0#1.base|) (<= 0 |ULTIMATE.start_strlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_strlcat_~src#1.offset| 0) (<= |ULTIMATE.start_strlcat_#in~src#1.offset| 0) (<= 1 |ULTIMATE.start_main_~in_len~0#1|) (<= |ULTIMATE.start_strlen_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~out~0#1.offset|) (<= 1 |ULTIMATE.start_main_~out_len~0#1|))) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (not (<= (+ |ULTIMATE.start_strlen_~s#1.offset| 1) (select |#length| |ULTIMATE.start_strlen_~s#1.base|))) (= |ULTIMATE.start_main_#t~malloc18#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:03:57,857 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:03:57,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:03:57,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2022-12-14 13:03:57,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509232849] [2022-12-14 13:03:57,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:03:57,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 13:03:57,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:57,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 13:03:57,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 13:03:57,858 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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) [2022-12-14 13:03:59,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:59,255 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2022-12-14 13:03:59,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 13:03:59,256 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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) Word has length 17 [2022-12-14 13:03:59,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:59,256 INFO L225 Difference]: With dead ends: 74 [2022-12-14 13:03:59,256 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 13:03:59,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=409, Invalid=2141, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 13:03:59,258 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 246 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:59,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 113 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:03:59,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 13:03:59,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 55. [2022-12-14 13:03:59,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.26) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:59,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-12-14 13:03:59,260 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 17 [2022-12-14 13:03:59,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:59,260 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-12-14 13:03:59,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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) [2022-12-14 13:03:59,260 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-12-14 13:03:59,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 13:03:59,260 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:59,261 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:03:59,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 13:03:59,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 13:03:59,462 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-14 13:03:59,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:59,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1918838854, now seen corresponding path program 1 times [2022-12-14 13:03:59,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:59,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420001156] [2022-12-14 13:03:59,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:59,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 13:03:59,500 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 13:03:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 13:03:59,534 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 13:03:59,534 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 13:03:59,535 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 17 remaining) [2022-12-14 13:03:59,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 17 remaining) [2022-12-14 13:03:59,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 17 remaining) [2022-12-14 13:03:59,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 17 remaining) [2022-12-14 13:03:59,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 17 remaining) [2022-12-14 13:03:59,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 17 remaining) [2022-12-14 13:03:59,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 17 remaining) [2022-12-14 13:03:59,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 17 remaining) [2022-12-14 13:03:59,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 17 remaining) [2022-12-14 13:03:59,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 17 remaining) [2022-12-14 13:03:59,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 17 remaining) [2022-12-14 13:03:59,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 17 remaining) [2022-12-14 13:03:59,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 17 remaining) [2022-12-14 13:03:59,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 17 remaining) [2022-12-14 13:03:59,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 17 remaining) [2022-12-14 13:03:59,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 17 remaining) [2022-12-14 13:03:59,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK (0 of 17 remaining) [2022-12-14 13:03:59,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 13:03:59,542 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:03:59,546 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 13:03:59,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 01:03:59 BoogieIcfgContainer [2022-12-14 13:03:59,576 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 13:03:59,577 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 13:03:59,577 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 13:03:59,577 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 13:03:59,577 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:03:06" (3/4) ... [2022-12-14 13:03:59,579 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 13:03:59,618 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 13:03:59,618 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 13:03:59,619 INFO L158 Benchmark]: Toolchain (without parser) took 53489.03ms. Allocated memory was 134.2MB in the beginning and 161.5MB in the end (delta: 27.3MB). Free memory was 97.5MB in the beginning and 116.8MB in the end (delta: -19.3MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. [2022-12-14 13:03:59,619 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 134.2MB. Free memory is still 99.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 13:03:59,619 INFO L158 Benchmark]: CACSL2BoogieTranslator took 266.59ms. Allocated memory is still 134.2MB. Free memory was 97.5MB in the beginning and 81.2MB in the end (delta: 16.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 13:03:59,619 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.23ms. Allocated memory is still 134.2MB. Free memory was 81.2MB in the beginning and 79.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 13:03:59,620 INFO L158 Benchmark]: Boogie Preprocessor took 19.14ms. Allocated memory is still 134.2MB. Free memory was 79.1MB in the beginning and 77.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 13:03:59,620 INFO L158 Benchmark]: RCFGBuilder took 376.42ms. Allocated memory is still 134.2MB. Free memory was 77.3MB in the beginning and 59.3MB in the end (delta: 18.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-12-14 13:03:59,620 INFO L158 Benchmark]: TraceAbstraction took 52749.89ms. Allocated memory was 134.2MB in the beginning and 161.5MB in the end (delta: 27.3MB). Free memory was 58.5MB in the beginning and 120.0MB in the end (delta: -61.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 13:03:59,620 INFO L158 Benchmark]: Witness Printer took 41.75ms. Allocated memory is still 161.5MB. Free memory was 120.0MB in the beginning and 116.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-14 13:03:59,621 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 134.2MB. Free memory is still 99.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 266.59ms. Allocated memory is still 134.2MB. Free memory was 97.5MB in the beginning and 81.2MB in the end (delta: 16.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.23ms. Allocated memory is still 134.2MB. Free memory was 81.2MB in the beginning and 79.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.14ms. Allocated memory is still 134.2MB. Free memory was 79.1MB in the beginning and 77.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 376.42ms. Allocated memory is still 134.2MB. Free memory was 77.3MB in the beginning and 59.3MB in the end (delta: 18.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 52749.89ms. Allocated memory was 134.2MB in the beginning and 161.5MB in the end (delta: 27.3MB). Free memory was 58.5MB in the beginning and 120.0MB in the end (delta: -61.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 41.75ms. Allocated memory is still 161.5MB. Free memory was 120.0MB in the beginning and 116.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L538] int in_len = __VERIFIER_nondet_int(); [L539] COND FALSE !(in_len < 1) [L540] char* in = __builtin_alloca (in_len); VAL [__builtin_alloca (in_len)={3:0}, in={3:0}, in_len=1] [L541] in[in_len-1]=0 [L542] int out_len = __VERIFIER_nondet_int(); [L543] COND FALSE !(out_len < 1) [L544] char* out = __builtin_alloca (out_len); VAL [__builtin_alloca (in_len)={3:0}, __builtin_alloca (out_len)={2:0}, in={3:0}, in_len=1, out={2:0}, out_len=2147483647] [L545] out[out_len-1]=0 [L546] CALL strlcat(in, out, out_len) [L517] register char *d = dst; [L518] register const char *s = src; [L519] register size_t n = siz; [L520] size_t dlen; VAL [\old(siz)=2147483647, d={3:0}, dst={3:0}, dst={3:0}, n=2147483647, s={2:0}, siz=2147483647, src={2:0}, src={2:0}] [L521] EXPR \read(*d) [L521] *d != '\0' && n-- != 0 VAL [*d != '\0' && n-- != 0=0, \old(siz)=2147483647, \read(*d)=0, d={3:0}, dst={3:0}, dst={3:0}, n=2147483647, n--=18446744073709551616, s={2:0}, siz=2147483647, src={2:0}, src={2:0}] [L521] COND FALSE !(*d != '\0' && n-- != 0) [L523] dlen = d - dst [L524] n = siz - dlen VAL [\old(siz)=2147483647, d={3:0}, dlen=0, dst={3:0}, dst={3:0}, n=2147483647, s={2:0}, siz=2147483647, src={2:0}, src={2:0}] [L525] COND FALSE !(n == 0) VAL [\old(siz)=2147483647, d={3:0}, dlen=0, dst={3:0}, dst={3:0}, n=2147483647, s={2:0}, siz=2147483647, src={2:0}, src={2:0}] [L527] EXPR \read(*s) VAL [\old(siz)=2147483647, \read(*s)=18446744073709551617, d={3:0}, dlen=0, dst={3:0}, dst={3:0}, n=2147483647, s={2:0}, siz=2147483647, src={2:0}, src={2:0}] [L527] COND TRUE *s != '\0' [L528] COND TRUE n != 1 [L529] EXPR d++ VAL [\old(siz)=2147483647, d={3:1}, d++={3:0}, dlen=0, dst={3:0}, dst={3:0}, n=2147483647, s={2:0}, siz=2147483647, src={2:0}, src={2:0}] [L529] EXPR \read(*s) VAL [\old(siz)=2147483647, \read(*s)=18446744073709551617, d={3:1}, d++={3:0}, dlen=0, dst={3:0}, dst={3:0}, n=2147483647, s={2:0}, siz=2147483647, src={2:0}, src={2:0}] [L529] *d++ = *s [L530] n-- VAL [\old(siz)=2147483647, d={3:1}, dlen=0, dst={3:0}, dst={3:0}, n=2147483646, s={2:0}, siz=2147483647, src={2:0}, src={2:0}] [L532] s++ VAL [\old(siz)=2147483647, d={3:1}, dlen=0, dst={3:0}, dst={3:0}, n=2147483646, s={2:1}, siz=2147483647, src={2:0}, src={2:0}] [L527] EXPR \read(*s) VAL [\old(siz)=2147483647, \read(*s)=0, d={3:1}, dlen=0, dst={3:0}, dst={3:0}, n=2147483646, s={2:1}, siz=2147483647, src={2:0}, src={2:0}] [L527] COND FALSE !(*s != '\0') [L534] *d = '\0' - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 17 error locations. Started 1 CEGAR loops. OverallTime: 52.7s, OverallIterations: 24, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 25.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 2864 SdHoareTripleChecker+Valid, 5.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2864 mSDsluCounter, 1373 SdHoareTripleChecker+Invalid, 4.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 893 mSDsCounter, 108 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2520 IncrementalHoareTripleChecker+Invalid, 2630 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 108 mSolverCounterUnsat, 480 mSDtfsCounter, 2520 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 474 GetRequests, 155 SyntacticMatches, 8 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1967 ImplicationChecksByTransitivity, 37.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=23, InterpolantAutomatonStates: 178, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 23 MinimizatonAttempts, 225 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 7.1s InterpolantComputationTime, 355 NumberOfCodeBlocks, 355 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 392 ConstructedInterpolants, 48 QuantifiedInterpolants, 4766 SizeOfPredicates, 125 NumberOfNonLiveVariables, 1097 ConjunctsInSsa, 264 ConjunctsInUnsatCore, 38 InterpolantComputations, 16 PerfectInterpolantSequences, 16/55 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.4s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 22, DAG_INTERPRETER_EARLY_EXITS: 2, TOOLS_POST_APPLICATIONS: 27, TOOLS_POST_TIME: 0.4s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 27, TOOLS_QUANTIFIERELIM_TIME: 0.4s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 54, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 1, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 22, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 1, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 277, DAG_COMPRESSION_RETAINED_NODES: 70, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-14 13:03:59,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d41ac30-9838-4a0d-80ec-89eca889f5f9/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)