./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/derefInLoop1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b 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_9d0445bf-bddb-4b1f-8700-de121336ac45/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0445bf-bddb-4b1f-8700-de121336ac45/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0445bf-bddb-4b1f-8700-de121336ac45/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0445bf-bddb-4b1f-8700-de121336ac45/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefInLoop1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0445bf-bddb-4b1f-8700-de121336ac45/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0445bf-bddb-4b1f-8700-de121336ac45/bin/utaipan-I9t0OCRTmS --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 0c9e9bbe7dcc8bff15d80e0cdda24a07d629fdcc505b89526a3de5ae567627e5 --- 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-8393723 [2022-11-19 08:08:11,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:08:11,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:08:11,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:08:11,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:08:11,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:08:11,831 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:08:11,833 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:08:11,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:08:11,837 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:08:11,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:08:11,839 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:08:11,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:08:11,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:08:11,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:08:11,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:08:11,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:08:11,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:08:11,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:08:11,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:08:11,862 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:08:11,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:08:11,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:08:11,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:08:11,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:08:11,882 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:08:11,883 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:08:11,884 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:08:11,885 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:08:11,886 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:08:11,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:08:11,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:08:11,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:08:11,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:08:11,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:08:11,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:08:11,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:08:11,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:08:11,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:08:11,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:08:11,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:08:11,901 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0445bf-bddb-4b1f-8700-de121336ac45/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 08:08:11,924 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:08:11,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:08:11,925 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:08:11,925 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:08:11,926 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:08:11,926 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:08:11,927 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:08:11,927 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:08:11,927 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:08:11,928 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:08:11,928 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:08:11,928 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:08:11,928 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:08:11,929 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:08:11,929 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:08:11,929 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:08:11,930 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:08:11,930 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:08:11,931 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 08:08:11,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 08:08:11,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:08:11,932 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:08:11,932 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 08:08:11,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:08:11,933 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:08:11,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:08:11,933 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 08:08:11,934 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 08:08:11,934 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 08:08:11,934 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:08:11,934 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 08:08:11,935 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:08:11,935 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:08:11,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:08:11,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:08:11,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:08:11,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:08:11,936 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:08:11,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:08:11,937 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:08:11,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:08:11,938 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:08:11,938 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_9d0445bf-bddb-4b1f-8700-de121336ac45/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0445bf-bddb-4b1f-8700-de121336ac45/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c9e9bbe7dcc8bff15d80e0cdda24a07d629fdcc505b89526a3de5ae567627e5 [2022-11-19 08:08:12,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:08:12,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:08:12,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:08:12,326 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:08:12,327 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:08:12,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0445bf-bddb-4b1f-8700-de121336ac45/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/memsafety-ext3/derefInLoop1.c [2022-11-19 08:08:12,428 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0445bf-bddb-4b1f-8700-de121336ac45/bin/utaipan-I9t0OCRTmS/data/9e3e92b62/2848e6a9108446aeac5e0141343fa58a/FLAG69dd50769 [2022-11-19 08:08:12,959 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:08:12,960 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0445bf-bddb-4b1f-8700-de121336ac45/sv-benchmarks/c/memsafety-ext3/derefInLoop1.c [2022-11-19 08:08:12,965 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0445bf-bddb-4b1f-8700-de121336ac45/bin/utaipan-I9t0OCRTmS/data/9e3e92b62/2848e6a9108446aeac5e0141343fa58a/FLAG69dd50769 [2022-11-19 08:08:13,331 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0445bf-bddb-4b1f-8700-de121336ac45/bin/utaipan-I9t0OCRTmS/data/9e3e92b62/2848e6a9108446aeac5e0141343fa58a [2022-11-19 08:08:13,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:08:13,335 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:08:13,337 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:08:13,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:08:13,341 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:08:13,342 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:08:13" (1/1) ... [2022-11-19 08:08:13,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@abd8d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:13, skipping insertion in model container [2022-11-19 08:08:13,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:08:13" (1/1) ... [2022-11-19 08:08:13,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:08:13,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:08:13,531 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:08:13,547 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:08:13,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:08:13,587 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:08:13,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:13 WrapperNode [2022-11-19 08:08:13,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:08:13,589 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:08:13,589 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:08:13,589 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:08:13,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:13" (1/1) ... [2022-11-19 08:08:13,608 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:13" (1/1) ... [2022-11-19 08:08:13,630 INFO L138 Inliner]: procedures = 7, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 22 [2022-11-19 08:08:13,631 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:08:13,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:08:13,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:08:13,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:08:13,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:13" (1/1) ... [2022-11-19 08:08:13,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:13" (1/1) ... [2022-11-19 08:08:13,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:13" (1/1) ... [2022-11-19 08:08:13,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:13" (1/1) ... [2022-11-19 08:08:13,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:13" (1/1) ... [2022-11-19 08:08:13,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:13" (1/1) ... [2022-11-19 08:08:13,658 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:13" (1/1) ... [2022-11-19 08:08:13,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:13" (1/1) ... [2022-11-19 08:08:13,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:08:13,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:08:13,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:08:13,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:08:13,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:13" (1/1) ... [2022-11-19 08:08:13,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:08:13,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0445bf-bddb-4b1f-8700-de121336ac45/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:08:13,702 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0445bf-bddb-4b1f-8700-de121336ac45/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:08:13,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0445bf-bddb-4b1f-8700-de121336ac45/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:08:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:08:13,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:08:13,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:08:13,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:08:13,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:08:13,829 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:08:13,831 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:08:13,955 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:08:13,974 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:08:13,974 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 08:08:13,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:08:13 BoogieIcfgContainer [2022-11-19 08:08:13,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:08:13,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:08:13,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:08:13,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:08:13,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:08:13" (1/3) ... [2022-11-19 08:08:13,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255000f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:08:13, skipping insertion in model container [2022-11-19 08:08:13,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:13" (2/3) ... [2022-11-19 08:08:13,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255000f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:08:13, skipping insertion in model container [2022-11-19 08:08:13,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:08:13" (3/3) ... [2022-11-19 08:08:13,998 INFO L112 eAbstractionObserver]: Analyzing ICFG derefInLoop1.c [2022-11-19 08:08:14,016 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:08:14,016 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-19 08:08:14,071 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:08:14,078 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;@1840edc8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:08:14,079 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-19 08:08:14,086 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:08:14,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 08:08:14,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:14,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 08:08:14,095 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2022-11-19 08:08:14,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:14,104 INFO L85 PathProgramCache]: Analyzing trace with hash 58678, now seen corresponding path program 1 times [2022-11-19 08:08:14,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:14,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436015618] [2022-11-19 08:08:14,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:14,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:08:14,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:14,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436015618] [2022-11-19 08:08:14,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436015618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:08:14,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:08:14,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:08:14,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166714691] [2022-11-19 08:08:14,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:08:14,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:08:14,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:14,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:08:14,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:08:14,347 INFO L87 Difference]: Start difference. First operand has 10 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 9 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) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:08:14,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:14,457 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2022-11-19 08:08:14,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:08:14,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 08:08:14,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:14,470 INFO L225 Difference]: With dead ends: 13 [2022-11-19 08:08:14,470 INFO L226 Difference]: Without dead ends: 12 [2022-11-19 08:08:14,473 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 [2022-11-19 08:08:14,478 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:14,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:08:14,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-19 08:08:14,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2022-11-19 08:08:14,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 8 states have (on average 1.5) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:08:14,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-11-19 08:08:14,538 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 3 [2022-11-19 08:08:14,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:14,539 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-11-19 08:08:14,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:08:14,541 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-11-19 08:08:14,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 08:08:14,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:14,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 08:08:14,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:08:14,544 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2022-11-19 08:08:14,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:14,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1727391791, now seen corresponding path program 1 times [2022-11-19 08:08:14,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:14,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591288426] [2022-11-19 08:08:14,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:14,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:08:14,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:14,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591288426] [2022-11-19 08:08:14,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591288426] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:08:14,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960971356] [2022-11-19 08:08:14,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:14,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:08:14,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0445bf-bddb-4b1f-8700-de121336ac45/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:08:14,747 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0445bf-bddb-4b1f-8700-de121336ac45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:08:14,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0445bf-bddb-4b1f-8700-de121336ac45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:08:14,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:14,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:08:14,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:08:14,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:08:14,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:08:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:08:14,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960971356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:08:14,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [420865440] [2022-11-19 08:08:15,025 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-19 08:08:15,025 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:08:15,035 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:08:15,048 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:08:15,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:08:15,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:08:15,270 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 08:08:15,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:08:15,420 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 08:08:15,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:08:15,447 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:08:15,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [420865440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:08:15,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:08:15,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 7 [2022-11-19 08:08:15,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086848653] [2022-11-19 08:08:15,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:08:15,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:08:15,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:15,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:08:15,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:08:15,994 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 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) [2022-11-19 08:08:16,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:16,103 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-11-19 08:08:16,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:08:16,108 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 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 [2022-11-19 08:08:16,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:16,109 INFO L225 Difference]: With dead ends: 18 [2022-11-19 08:08:16,109 INFO L226 Difference]: Without dead ends: 18 [2022-11-19 08:08:16,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:08:16,111 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:16,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:08:16,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-19 08:08:16,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2022-11-19 08:08:16,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 13 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) [2022-11-19 08:08:16,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-19 08:08:16,115 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2022-11-19 08:08:16,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:16,116 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-19 08:08:16,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 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) [2022-11-19 08:08:16,116 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-19 08:08:16,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:08:16,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:16,117 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-11-19 08:08:16,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0445bf-bddb-4b1f-8700-de121336ac45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:08:16,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0445bf-bddb-4b1f-8700-de121336ac45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:08:16,322 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2022-11-19 08:08:16,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:16,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2009516503, now seen corresponding path program 1 times [2022-11-19 08:08:16,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:16,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91011207] [2022-11-19 08:08:16,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:16,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 08:08:16,351 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 08:08:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 08:08:16,388 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 08:08:16,389 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 08:08:16,390 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 3 remaining) [2022-11-19 08:08:16,393 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 3 remaining) [2022-11-19 08:08:16,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 3 remaining) [2022-11-19 08:08:16,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:08:16,400 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-19 08:08:16,405 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 08:08:16,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 08:08:16 BoogieIcfgContainer [2022-11-19 08:08:16,444 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 08:08:16,444 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 08:08:16,444 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 08:08:16,445 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 08:08:16,445 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:08:13" (3/4) ... [2022-11-19 08:08:16,447 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-19 08:08:16,488 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0445bf-bddb-4b1f-8700-de121336ac45/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 08:08:16,488 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 08:08:16,489 INFO L158 Benchmark]: Toolchain (without parser) took 3153.55ms. Allocated memory is still 134.2MB. Free memory was 100.0MB in the beginning and 73.8MB in the end (delta: 26.2MB). Peak memory consumption was 24.9MB. Max. memory is 16.1GB. [2022-11-19 08:08:16,489 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 88.1MB. Free memory was 42.6MB in the beginning and 42.5MB in the end (delta: 40.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:08:16,490 INFO L158 Benchmark]: CACSL2BoogieTranslator took 251.07ms. Allocated memory is still 134.2MB. Free memory was 99.7MB in the beginning and 110.2MB in the end (delta: -10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 08:08:16,490 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.22ms. Allocated memory is still 134.2MB. Free memory was 110.2MB in the beginning and 108.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:08:16,490 INFO L158 Benchmark]: Boogie Preprocessor took 27.55ms. Allocated memory is still 134.2MB. Free memory was 108.8MB in the beginning and 107.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 08:08:16,491 INFO L158 Benchmark]: RCFGBuilder took 316.15ms. Allocated memory is still 134.2MB. Free memory was 107.3MB in the beginning and 97.6MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 08:08:16,491 INFO L158 Benchmark]: TraceAbstraction took 2455.28ms. Allocated memory is still 134.2MB. Free memory was 96.7MB in the beginning and 75.9MB in the end (delta: 20.9MB). Peak memory consumption was 21.5MB. Max. memory is 16.1GB. [2022-11-19 08:08:16,492 INFO L158 Benchmark]: Witness Printer took 44.05ms. Allocated memory is still 134.2MB. Free memory was 75.9MB in the beginning and 73.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 08:08:16,495 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 88.1MB. Free memory was 42.6MB in the beginning and 42.5MB in the end (delta: 40.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 251.07ms. Allocated memory is still 134.2MB. Free memory was 99.7MB in the beginning and 110.2MB in the end (delta: -10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.22ms. Allocated memory is still 134.2MB. Free memory was 110.2MB in the beginning and 108.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 27.55ms. Allocated memory is still 134.2MB. Free memory was 108.8MB in the beginning and 107.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 316.15ms. Allocated memory is still 134.2MB. Free memory was 107.3MB in the beginning and 97.6MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 2455.28ms. Allocated memory is still 134.2MB. Free memory was 96.7MB in the beginning and 75.9MB in the end (delta: 20.9MB). Peak memory consumption was 21.5MB. Max. memory is 16.1GB. * Witness Printer took 44.05ms. Allocated memory is still 134.2MB. Free memory was 75.9MB in the beginning and 73.8MB 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 - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L2] int* p; [L3] int i = 0; VAL [i=0] [L3] COND TRUE i < 2 [L4] int a[10]; VAL [a={3:0}, i=0] [L5] COND TRUE i == 0 [L6] p = a VAL [a={3:0}, i=0, p={3:0}] [L3] i++ [L3] COND TRUE i < 2 [L4] int a[10]; VAL [a={2:0}, i=1, p={3:0}] [L5] COND FALSE !(i == 0) VAL [a={2:0}, i=1, p={3:0}] [L8] p[0] = 1 - 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 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, 10 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 2.3s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6 mSDsluCounter, 10 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 49 IncrementalHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 6 mSDtfsCounter, 49 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=2, InterpolantAutomatonStates: 8, 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, 2 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 43 SizeOfPredicates, 0 NumberOfNonLiveVariables, 40 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 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: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 6, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 9, TOOLS_POST_TIME: 0.3s, 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: 9, TOOLS_QUANTIFIERELIM_TIME: 0.3s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 17, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.1s, 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: 6, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 0.1s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.1s, 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: 55, DAG_COMPRESSION_RETAINED_NODES: 22, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-19 08:08:16,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0445bf-bddb-4b1f-8700-de121336ac45/bin/utaipan-I9t0OCRTmS/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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)