./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-regression/test04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 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_a9cab488-a0cf-4aa9-94e5-c3d405d63b91/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cab488-a0cf-4aa9-94e5-c3d405d63b91/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cab488-a0cf-4aa9-94e5-c3d405d63b91/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cab488-a0cf-4aa9-94e5-c3d405d63b91/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-regression/test04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cab488-a0cf-4aa9-94e5-c3d405d63b91/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cab488-a0cf-4aa9-94e5-c3d405d63b91/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 774a580136eb5be5517f5bdf88a1aea58349f7d80571f2499dc303b413dfbdb7 --- 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-b5237d8 [2022-11-22 01:57:13,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:57:13,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:57:13,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:57:13,476 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:57:13,477 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:57:13,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:57:13,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:57:13,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:57:13,483 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:57:13,484 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:57:13,486 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:57:13,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:57:13,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:57:13,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:57:13,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:57:13,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:57:13,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:57:13,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:57:13,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:57:13,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:57:13,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:57:13,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:57:13,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:57:13,506 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:57:13,506 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:57:13,507 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:57:13,508 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:57:13,508 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:57:13,509 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:57:13,510 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:57:13,511 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:57:13,512 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:57:13,513 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:57:13,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:57:13,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:57:13,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:57:13,516 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:57:13,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:57:13,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:57:13,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:57:13,521 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cab488-a0cf-4aa9-94e5-c3d405d63b91/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 01:57:13,561 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:57:13,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:57:13,562 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:57:13,562 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:57:13,563 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:57:13,563 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:57:13,563 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:57:13,564 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:57:13,564 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:57:13,564 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:57:13,564 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:57:13,565 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:57:13,565 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:57:13,565 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:57:13,565 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:57:13,566 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:57:13,566 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:57:13,570 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:57:13,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 01:57:13,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 01:57:13,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:57:13,572 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:57:13,572 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:57:13,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:57:13,573 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:57:13,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:57:13,574 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 01:57:13,574 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 01:57:13,575 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 01:57:13,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:57:13,575 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 01:57:13,575 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:57:13,576 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:57:13,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:57:13,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:57:13,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:57:13,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:57:13,578 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:57:13,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:57:13,578 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:57:13,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:57:13,579 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:57:13,579 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_a9cab488-a0cf-4aa9-94e5-c3d405d63b91/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cab488-a0cf-4aa9-94e5-c3d405d63b91/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 774a580136eb5be5517f5bdf88a1aea58349f7d80571f2499dc303b413dfbdb7 [2022-11-22 01:57:13,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:57:13,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:57:13,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:57:13,946 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:57:13,947 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:57:13,948 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cab488-a0cf-4aa9-94e5-c3d405d63b91/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/ldv-regression/test04.c [2022-11-22 01:57:17,078 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:57:17,268 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:57:17,270 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cab488-a0cf-4aa9-94e5-c3d405d63b91/sv-benchmarks/c/ldv-regression/test04.c [2022-11-22 01:57:17,279 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cab488-a0cf-4aa9-94e5-c3d405d63b91/bin/utaipan-g80aRyZoba/data/30a3d777f/516b3a1228444d56bb7da7a20686c1f1/FLAG108674747 [2022-11-22 01:57:17,293 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cab488-a0cf-4aa9-94e5-c3d405d63b91/bin/utaipan-g80aRyZoba/data/30a3d777f/516b3a1228444d56bb7da7a20686c1f1 [2022-11-22 01:57:17,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:57:17,297 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:57:17,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:57:17,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:57:17,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:57:17,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:57:17" (1/1) ... [2022-11-22 01:57:17,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49dcdbcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:17, skipping insertion in model container [2022-11-22 01:57:17,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:57:17" (1/1) ... [2022-11-22 01:57:17,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:57:17,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:57:17,470 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cab488-a0cf-4aa9-94e5-c3d405d63b91/sv-benchmarks/c/ldv-regression/test04.c[459,472] [2022-11-22 01:57:17,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:57:17,489 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:57:17,504 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cab488-a0cf-4aa9-94e5-c3d405d63b91/sv-benchmarks/c/ldv-regression/test04.c[459,472] [2022-11-22 01:57:17,505 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:57:17,520 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:57:17,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:17 WrapperNode [2022-11-22 01:57:17,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:57:17,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:57:17,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:57:17,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:57:17,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:17" (1/1) ... [2022-11-22 01:57:17,537 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:17" (1/1) ... [2022-11-22 01:57:17,555 INFO L138 Inliner]: procedures = 13, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2022-11-22 01:57:17,555 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:57:17,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:57:17,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:57:17,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:57:17,566 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:17" (1/1) ... [2022-11-22 01:57:17,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:17" (1/1) ... [2022-11-22 01:57:17,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:17" (1/1) ... [2022-11-22 01:57:17,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:17" (1/1) ... [2022-11-22 01:57:17,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:17" (1/1) ... [2022-11-22 01:57:17,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:17" (1/1) ... [2022-11-22 01:57:17,575 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:17" (1/1) ... [2022-11-22 01:57:17,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:17" (1/1) ... [2022-11-22 01:57:17,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:57:17,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:57:17,589 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:57:17,589 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:57:17,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:17" (1/1) ... [2022-11-22 01:57:17,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:57:17,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cab488-a0cf-4aa9-94e5-c3d405d63b91/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:57:17,628 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cab488-a0cf-4aa9-94e5-c3d405d63b91/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:57:17,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cab488-a0cf-4aa9-94e5-c3d405d63b91/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:57:17,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:57:17,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:57:17,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:57:17,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:57:17,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:57:17,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:57:17,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:57:17,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:57:17,750 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:57:17,752 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:57:17,893 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:57:17,953 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:57:17,959 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-22 01:57:17,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:57:17 BoogieIcfgContainer [2022-11-22 01:57:17,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:57:17,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:57:17,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:57:17,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:57:17,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:57:17" (1/3) ... [2022-11-22 01:57:17,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@742264e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:57:17, skipping insertion in model container [2022-11-22 01:57:17,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:17" (2/3) ... [2022-11-22 01:57:17,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@742264e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:57:17, skipping insertion in model container [2022-11-22 01:57:17,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:57:17" (3/3) ... [2022-11-22 01:57:17,981 INFO L112 eAbstractionObserver]: Analyzing ICFG test04.c [2022-11-22 01:57:18,005 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:57:18,005 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-22 01:57:18,070 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:57:18,078 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;@6e87045f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:57:18,078 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-22 01:57:18,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 12 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) [2022-11-22 01:57:18,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:57:18,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:57:18,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:57:18,091 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-11-22 01:57:18,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:57:18,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1773, now seen corresponding path program 1 times [2022-11-22 01:57:18,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:57:18,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61972000] [2022-11-22 01:57:18,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:57:18,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:57:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:57:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:57:18,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:57:18,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61972000] [2022-11-22 01:57:18,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61972000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:57:18,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:57:18,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:57:18,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927276763] [2022-11-22 01:57:18,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:57:18,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:57:18,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:57:18,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:57:18,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:57:18,619 INFO L87 Difference]: Start difference. First operand has 13 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 12 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) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:57:18,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:57:18,679 INFO L93 Difference]: Finished difference Result 12 states and 11 transitions. [2022-11-22 01:57:18,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:57:18,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-22 01:57:18,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:57:18,710 INFO L225 Difference]: With dead ends: 12 [2022-11-22 01:57:18,726 INFO L226 Difference]: Without dead ends: 11 [2022-11-22 01:57:18,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:57:18,731 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:57:18,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 4 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:57:18,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-22 01:57:18,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-22 01:57:18,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 10 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:57:18,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 10 transitions. [2022-11-22 01:57:18,782 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 10 transitions. Word has length 2 [2022-11-22 01:57:18,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:57:18,798 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 10 transitions. [2022-11-22 01:57:18,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:57:18,799 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 10 transitions. [2022-11-22 01:57:18,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:57:18,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:57:18,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:57:18,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:57:18,800 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-11-22 01:57:18,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:57:18,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1774, now seen corresponding path program 1 times [2022-11-22 01:57:18,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:57:18,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617087701] [2022-11-22 01:57:18,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:57:18,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:57:18,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:57:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:57:19,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:57:19,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617087701] [2022-11-22 01:57:19,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617087701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:57:19,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:57:19,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:57:19,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268720221] [2022-11-22 01:57:19,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:57:19,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:57:19,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:57:19,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:57:19,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:57:19,073 INFO L87 Difference]: Start difference. First operand 11 states and 10 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:57:19,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:57:19,097 INFO L93 Difference]: Finished difference Result 10 states and 9 transitions. [2022-11-22 01:57:19,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:57:19,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-22 01:57:19,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:57:19,099 INFO L225 Difference]: With dead ends: 10 [2022-11-22 01:57:19,099 INFO L226 Difference]: Without dead ends: 10 [2022-11-22 01:57:19,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:57:19,101 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:57:19,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 5 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:57:19,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-22 01:57:19,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-22 01:57:19,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 6 states have (on average 1.5) internal successors, (9), 9 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:57:19,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 9 transitions. [2022-11-22 01:57:19,104 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 9 transitions. Word has length 2 [2022-11-22 01:57:19,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:57:19,105 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 9 transitions. [2022-11-22 01:57:19,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:57:19,106 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 9 transitions. [2022-11-22 01:57:19,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 01:57:19,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:57:19,106 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 01:57:19,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:57:19,107 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-11-22 01:57:19,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:57:19,108 INFO L85 PathProgramCache]: Analyzing trace with hash 55531, now seen corresponding path program 1 times [2022-11-22 01:57:19,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:57:19,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906716222] [2022-11-22 01:57:19,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:57:19,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:57:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:57:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:57:19,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:57:19,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906716222] [2022-11-22 01:57:19,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906716222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:57:19,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:57:19,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:57:19,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973618957] [2022-11-22 01:57:19,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:57:19,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:57:19,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:57:19,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:57:19,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:57:19,213 INFO L87 Difference]: Start difference. First operand 10 states and 9 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:57:19,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:57:19,247 INFO L93 Difference]: Finished difference Result 9 states and 8 transitions. [2022-11-22 01:57:19,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:57:19,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-22 01:57:19,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:57:19,248 INFO L225 Difference]: With dead ends: 9 [2022-11-22 01:57:19,249 INFO L226 Difference]: Without dead ends: 9 [2022-11-22 01:57:19,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:57:19,250 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:57:19,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 3 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:57:19,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-22 01:57:19,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-22 01:57:19,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 8 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:57:19,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8 transitions. [2022-11-22 01:57:19,254 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 8 transitions. Word has length 3 [2022-11-22 01:57:19,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:57:19,254 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 8 transitions. [2022-11-22 01:57:19,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:57:19,255 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 8 transitions. [2022-11-22 01:57:19,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 01:57:19,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:57:19,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 01:57:19,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:57:19,256 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-11-22 01:57:19,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:57:19,256 INFO L85 PathProgramCache]: Analyzing trace with hash 55532, now seen corresponding path program 1 times [2022-11-22 01:57:19,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:57:19,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885295173] [2022-11-22 01:57:19,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:57:19,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:57:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:57:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:57:19,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:57:19,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885295173] [2022-11-22 01:57:19,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885295173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:57:19,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:57:19,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:57:19,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143695583] [2022-11-22 01:57:19,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:57:19,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:57:19,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:57:19,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:57:19,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:57:19,356 INFO L87 Difference]: Start difference. First operand 9 states and 8 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:57:19,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:57:19,378 INFO L93 Difference]: Finished difference Result 8 states and 7 transitions. [2022-11-22 01:57:19,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:57:19,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-22 01:57:19,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:57:19,380 INFO L225 Difference]: With dead ends: 8 [2022-11-22 01:57:19,380 INFO L226 Difference]: Without dead ends: 8 [2022-11-22 01:57:19,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:57:19,381 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:57:19,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 4 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:57:19,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-11-22 01:57:19,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-11-22 01:57:19,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 7 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:57:19,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2022-11-22 01:57:19,385 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 3 [2022-11-22 01:57:19,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:57:19,385 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2022-11-22 01:57:19,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:57:19,386 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2022-11-22 01:57:19,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:57:19,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:57:19,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:57:19,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:57:19,387 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-11-22 01:57:19,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:57:19,387 INFO L85 PathProgramCache]: Analyzing trace with hash 53364847, now seen corresponding path program 1 times [2022-11-22 01:57:19,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:57:19,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794345131] [2022-11-22 01:57:19,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:57:19,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:57:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:57:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:57:19,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:57:19,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794345131] [2022-11-22 01:57:19,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794345131] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:57:19,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:57:19,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:57:19,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482059784] [2022-11-22 01:57:19,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:57:19,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:57:19,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:57:19,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:57:19,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:57:19,593 INFO L87 Difference]: Start difference. First operand 8 states and 7 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:57:19,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:57:19,619 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2022-11-22 01:57:19,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:57:19,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-22 01:57:19,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:57:19,621 INFO L225 Difference]: With dead ends: 7 [2022-11-22 01:57:19,621 INFO L226 Difference]: Without dead ends: 6 [2022-11-22 01:57:19,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:57:19,622 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:57:19,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:57:19,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2022-11-22 01:57:19,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2022-11-22 01:57:19,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:57:19,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 5 transitions. [2022-11-22 01:57:19,624 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 5 transitions. Word has length 5 [2022-11-22 01:57:19,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:57:19,625 INFO L495 AbstractCegarLoop]: Abstraction has 6 states and 5 transitions. [2022-11-22 01:57:19,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:57:19,625 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 5 transitions. [2022-11-22 01:57:19,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:57:19,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:57:19,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:57:19,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:57:19,626 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-11-22 01:57:19,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:57:19,627 INFO L85 PathProgramCache]: Analyzing trace with hash 53364782, now seen corresponding path program 1 times [2022-11-22 01:57:19,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:57:19,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898578100] [2022-11-22 01:57:19,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:57:19,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:57:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:57:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:57:19,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:57:19,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898578100] [2022-11-22 01:57:19,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898578100] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:57:19,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:57:19,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:57:19,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146677433] [2022-11-22 01:57:19,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:57:19,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:57:19,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:57:19,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:57:19,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:57:19,831 INFO L87 Difference]: Start difference. First operand 6 states and 5 transitions. Second operand has 5 states, 5 states have (on average 1.0) 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) [2022-11-22 01:57:19,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:57:19,852 INFO L93 Difference]: Finished difference Result 4 states and 3 transitions. [2022-11-22 01:57:19,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:57:19,853 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) 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 [2022-11-22 01:57:19,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:57:19,853 INFO L225 Difference]: With dead ends: 4 [2022-11-22 01:57:19,853 INFO L226 Difference]: Without dead ends: 0 [2022-11-22 01:57:19,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:57:19,859 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:57:19,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:57:19,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-22 01:57:19,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-22 01:57:19,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:57:19,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-22 01:57:19,866 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2022-11-22 01:57:19,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:57:19,867 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-22 01:57:19,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) 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) [2022-11-22 01:57:19,867 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-22 01:57:19,867 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-22 01:57:19,870 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 6 remaining) [2022-11-22 01:57:19,871 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2022-11-22 01:57:19,871 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2022-11-22 01:57:19,871 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2022-11-22 01:57:19,872 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2022-11-22 01:57:19,872 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2022-11-22 01:57:19,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:57:19,875 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-22 01:57:19,878 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-22 01:57:19,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:57:19 BoogieIcfgContainer [2022-11-22 01:57:19,882 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-22 01:57:19,882 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-22 01:57:19,883 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-22 01:57:19,883 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-22 01:57:19,883 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:57:17" (3/4) ... [2022-11-22 01:57:19,886 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-22 01:57:19,897 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2022-11-22 01:57:19,898 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2022-11-22 01:57:19,898 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-22 01:57:19,898 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-22 01:57:19,933 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cab488-a0cf-4aa9-94e5-c3d405d63b91/bin/utaipan-g80aRyZoba/witness.graphml [2022-11-22 01:57:19,933 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-22 01:57:19,934 INFO L158 Benchmark]: Toolchain (without parser) took 2637.23ms. Allocated memory is still 176.2MB. Free memory was 133.1MB in the beginning and 127.0MB in the end (delta: 6.1MB). Peak memory consumption was 8.0MB. Max. memory is 16.1GB. [2022-11-22 01:57:19,934 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 130.0MB. Free memory is still 74.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 01:57:19,934 INFO L158 Benchmark]: CACSL2BoogieTranslator took 222.79ms. Allocated memory is still 176.2MB. Free memory was 132.9MB in the beginning and 123.0MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-22 01:57:19,935 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.79ms. Allocated memory is still 176.2MB. Free memory was 123.0MB in the beginning and 121.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 01:57:19,935 INFO L158 Benchmark]: Boogie Preprocessor took 30.92ms. Allocated memory is still 176.2MB. Free memory was 121.5MB in the beginning and 120.6MB in the end (delta: 953.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 01:57:19,935 INFO L158 Benchmark]: RCFGBuilder took 379.37ms. Allocated memory is still 176.2MB. Free memory was 120.6MB in the beginning and 107.8MB in the end (delta: 12.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-22 01:57:19,936 INFO L158 Benchmark]: TraceAbstraction took 1912.38ms. Allocated memory is still 176.2MB. Free memory was 106.8MB in the beginning and 129.1MB in the end (delta: -22.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 01:57:19,936 INFO L158 Benchmark]: Witness Printer took 50.99ms. Allocated memory is still 176.2MB. Free memory was 129.1MB in the beginning and 127.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 01:57:19,939 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 130.0MB. Free memory is still 74.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 222.79ms. Allocated memory is still 176.2MB. Free memory was 132.9MB in the beginning and 123.0MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.79ms. Allocated memory is still 176.2MB. Free memory was 123.0MB in the beginning and 121.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.92ms. Allocated memory is still 176.2MB. Free memory was 121.5MB in the beginning and 120.6MB in the end (delta: 953.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 379.37ms. Allocated memory is still 176.2MB. Free memory was 120.6MB in the beginning and 107.8MB in the end (delta: 12.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1912.38ms. Allocated memory is still 176.2MB. Free memory was 106.8MB in the beginning and 129.1MB in the end (delta: -22.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 50.99ms. Allocated memory is still 176.2MB. Free memory was 129.1MB in the beginning and 127.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. 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 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 24]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 10]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 1.8s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 34 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 34 mSDsluCounter, 20 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 46 IncrementalHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 16 mSDtfsCounter, 46 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 118 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 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: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-22 01:57:19,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cab488-a0cf-4aa9-94e5-c3d405d63b91/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE