./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/elimination_max_rec.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_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/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_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/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_49b93cc5-608c-4c66-9093-8e03d28f32c5/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 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a --- 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 02:01:24,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:01:24,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:01:24,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:01:24,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:01:24,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:01:24,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:01:24,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:01:24,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:01:24,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:01:24,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:01:24,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:01:24,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:01:24,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:01:24,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:01:24,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:01:24,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:01:24,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:01:24,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:01:24,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:01:24,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:01:24,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:01:24,928 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:01:24,929 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:01:24,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:01:24,933 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:01:24,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:01:24,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:01:24,936 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:01:24,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:01:24,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:01:24,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:01:24,939 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:01:24,940 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:01:24,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:01:24,942 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:01:24,943 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:01:24,943 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:01:24,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:01:24,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:01:24,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:01:24,948 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 02:01:24,975 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:01:24,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:01:24,976 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:01:24,976 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:01:24,976 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:01:24,977 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:01:24,977 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:01:24,977 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:01:24,977 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:01:24,978 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:01:24,978 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:01:24,978 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:01:24,978 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:01:24,989 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:01:24,990 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:01:24,990 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:01:24,990 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:01:24,991 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:01:24,991 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 02:01:24,992 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 02:01:24,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:01:24,992 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:01:24,993 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 02:01:24,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:01:24,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:01:24,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:01:24,994 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 02:01:24,994 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 02:01:24,994 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 02:01:24,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:01:24,994 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 02:01:24,995 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:01:24,995 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:01:24,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:01:24,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:01:24,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:01:24,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:01:24,996 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:01:24,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:01:24,997 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:01:24,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:01:24,997 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:01:24,997 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_49b93cc5-608c-4c66-9093-8e03d28f32c5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a [2022-11-22 02:01:25,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:01:25,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:01:25,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:01:25,362 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:01:25,362 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:01:25,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/verifythis/elimination_max_rec.c [2022-11-22 02:01:28,462 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:01:28,755 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:01:28,756 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/sv-benchmarks/c/verifythis/elimination_max_rec.c [2022-11-22 02:01:28,763 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/data/32b40cfae/7d6ad3c567e343ba999d5fa118eaf782/FLAGc9e3428c2 [2022-11-22 02:01:28,785 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/data/32b40cfae/7d6ad3c567e343ba999d5fa118eaf782 [2022-11-22 02:01:28,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:01:28,796 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:01:28,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:01:28,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:01:28,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:01:28,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:01:28" (1/1) ... [2022-11-22 02:01:28,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3945dffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:01:28, skipping insertion in model container [2022-11-22 02:01:28,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:01:28" (1/1) ... [2022-11-22 02:01:28,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:01:28,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:01:28,985 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_49b93cc5-608c-4c66-9093-8e03d28f32c5/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2022-11-22 02:01:29,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:01:29,016 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:01:29,028 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_49b93cc5-608c-4c66-9093-8e03d28f32c5/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2022-11-22 02:01:29,035 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:01:29,050 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:01:29,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:01:29 WrapperNode [2022-11-22 02:01:29,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:01:29,051 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:01:29,051 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:01:29,051 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:01:29,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:01:29" (1/1) ... [2022-11-22 02:01:29,066 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:01:29" (1/1) ... [2022-11-22 02:01:29,083 INFO L138 Inliner]: procedures = 19, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 28 [2022-11-22 02:01:29,083 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:01:29,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:01:29,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:01:29,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:01:29,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:01:29" (1/1) ... [2022-11-22 02:01:29,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:01:29" (1/1) ... [2022-11-22 02:01:29,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:01:29" (1/1) ... [2022-11-22 02:01:29,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:01:29" (1/1) ... [2022-11-22 02:01:29,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:01:29" (1/1) ... [2022-11-22 02:01:29,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:01:29" (1/1) ... [2022-11-22 02:01:29,105 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:01:29" (1/1) ... [2022-11-22 02:01:29,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:01:29" (1/1) ... [2022-11-22 02:01:29,108 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:01:29,109 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:01:29,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:01:29,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:01:29,110 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:01:29" (1/1) ... [2022-11-22 02:01:29,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:01:29,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:01:29,155 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:01:29,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:01:29,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:01:29,207 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 02:01:29,207 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 02:01:29,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:01:29,208 INFO L130 BoogieDeclarations]: Found specification of procedure check [2022-11-22 02:01:29,208 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2022-11-22 02:01:29,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 02:01:29,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:01:29,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:01:29,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 02:01:29,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-22 02:01:29,209 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-22 02:01:29,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:01:29,353 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:01:29,355 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:01:29,752 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:01:29,803 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:01:29,803 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-22 02:01:29,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:01:29 BoogieIcfgContainer [2022-11-22 02:01:29,806 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:01:29,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:01:29,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:01:29,813 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:01:29,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:01:28" (1/3) ... [2022-11-22 02:01:29,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fbc508d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:01:29, skipping insertion in model container [2022-11-22 02:01:29,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:01:29" (2/3) ... [2022-11-22 02:01:29,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fbc508d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:01:29, skipping insertion in model container [2022-11-22 02:01:29,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:01:29" (3/3) ... [2022-11-22 02:01:29,817 INFO L112 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2022-11-22 02:01:29,837 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:01:29,837 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-11-22 02:01:29,902 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:01:29,916 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;@41aba5f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:01:29,916 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-11-22 02:01:29,921 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 35 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 02:01:29,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:01:29,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:01:29,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:01:29,930 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2022-11-22 02:01:29,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:01:29,939 INFO L85 PathProgramCache]: Analyzing trace with hash -968354357, now seen corresponding path program 1 times [2022-11-22 02:01:29,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:01:29,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315164720] [2022-11-22 02:01:29,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:29,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:01:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:30,496 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 02:01:30,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:01:30,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315164720] [2022-11-22 02:01:30,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315164720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:01:30,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:01:30,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:01:30,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294949407] [2022-11-22 02:01:30,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:01:30,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:01:30,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:01:30,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:01:30,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:01:30,568 INFO L87 Difference]: Start difference. First operand has 45 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 35 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:01:30,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:01:30,838 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2022-11-22 02:01:30,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:01:30,842 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-11-22 02:01:30,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:01:30,854 INFO L225 Difference]: With dead ends: 74 [2022-11-22 02:01:30,855 INFO L226 Difference]: Without dead ends: 73 [2022-11-22 02:01:30,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:01:30,864 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 34 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:01:30,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 163 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:01:30,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-22 02:01:30,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2022-11-22 02:01:30,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 47 states have internal predecessors, (57), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 02:01:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2022-11-22 02:01:30,930 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 12 [2022-11-22 02:01:30,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:01:30,932 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2022-11-22 02:01:30,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:01:30,932 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2022-11-22 02:01:30,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:01:30,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:01:30,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:01:30,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:01:30,936 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2022-11-22 02:01:30,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:01:30,937 INFO L85 PathProgramCache]: Analyzing trace with hash -969714010, now seen corresponding path program 1 times [2022-11-22 02:01:30,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:01:30,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593206612] [2022-11-22 02:01:30,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:30,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:01:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:31,065 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 02:01:31,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:01:31,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593206612] [2022-11-22 02:01:31,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593206612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:01:31,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:01:31,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:01:31,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507693092] [2022-11-22 02:01:31,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:01:31,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:01:31,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:01:31,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:01:31,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:01:31,079 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:01:31,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:01:31,121 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2022-11-22 02:01:31,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:01:31,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 12 [2022-11-22 02:01:31,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:01:31,133 INFO L225 Difference]: With dead ends: 62 [2022-11-22 02:01:31,133 INFO L226 Difference]: Without dead ends: 62 [2022-11-22 02:01:31,133 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 [2022-11-22 02:01:31,135 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:01:31,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 70 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:01:31,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-22 02:01:31,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-22 02:01:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 35 states have (on average 1.6) internal successors, (56), 46 states have internal predecessors, (56), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 02:01:31,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2022-11-22 02:01:31,149 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 12 [2022-11-22 02:01:31,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:01:31,149 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2022-11-22 02:01:31,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:01:31,150 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2022-11-22 02:01:31,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 02:01:31,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:01:31,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:01:31,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:01:31,154 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2022-11-22 02:01:31,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:01:31,167 INFO L85 PathProgramCache]: Analyzing trace with hash 3636804, now seen corresponding path program 1 times [2022-11-22 02:01:31,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:01:31,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402886190] [2022-11-22 02:01:31,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:31,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:01:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:31,302 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 02:01:31,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:01:31,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402886190] [2022-11-22 02:01:31,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402886190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:01:31,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:01:31,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:01:31,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407019122] [2022-11-22 02:01:31,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:01:31,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:01:31,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:01:31,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:01:31,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:01:31,306 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:01:31,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:01:31,334 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-11-22 02:01:31,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:01:31,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2022-11-22 02:01:31,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:01:31,336 INFO L225 Difference]: With dead ends: 61 [2022-11-22 02:01:31,336 INFO L226 Difference]: Without dead ends: 61 [2022-11-22 02:01:31,337 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 [2022-11-22 02:01:31,338 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:01:31,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 67 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:01:31,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-22 02:01:31,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-11-22 02:01:31,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 45 states have internal predecessors, (55), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 02:01:31,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2022-11-22 02:01:31,348 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 13 [2022-11-22 02:01:31,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:01:31,349 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2022-11-22 02:01:31,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:01:31,349 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2022-11-22 02:01:31,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 02:01:31,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:01:31,350 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:01:31,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:01:31,351 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2022-11-22 02:01:31,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:01:31,352 INFO L85 PathProgramCache]: Analyzing trace with hash 112740968, now seen corresponding path program 1 times [2022-11-22 02:01:31,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:01:31,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662809052] [2022-11-22 02:01:31,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:31,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:01:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:31,450 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 02:01:31,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:01:31,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662809052] [2022-11-22 02:01:31,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662809052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:01:31,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:01:31,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:01:31,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121957080] [2022-11-22 02:01:31,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:01:31,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:01:31,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:01:31,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:01:31,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:01:31,454 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:01:31,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:01:31,486 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2022-11-22 02:01:31,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:01:31,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2022-11-22 02:01:31,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:01:31,488 INFO L225 Difference]: With dead ends: 60 [2022-11-22 02:01:31,488 INFO L226 Difference]: Without dead ends: 60 [2022-11-22 02:01:31,489 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 [2022-11-22 02:01:31,490 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:01:31,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:01:31,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-22 02:01:31,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-22 02:01:31,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.542857142857143) internal successors, (54), 44 states have internal predecessors, (54), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 02:01:31,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2022-11-22 02:01:31,498 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 14 [2022-11-22 02:01:31,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:01:31,498 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2022-11-22 02:01:31,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:01:31,499 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2022-11-22 02:01:31,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 02:01:31,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:01:31,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:01:31,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:01:31,500 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2022-11-22 02:01:31,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:01:31,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1054594017, now seen corresponding path program 1 times [2022-11-22 02:01:31,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:01:31,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673382180] [2022-11-22 02:01:31,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:31,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:01:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:31,648 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 02:01:31,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:01:31,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673382180] [2022-11-22 02:01:31,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673382180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:01:31,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:01:31,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:01:31,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214767673] [2022-11-22 02:01:31,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:01:31,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:01:31,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:01:31,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:01:31,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:01:31,656 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:01:31,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:01:31,770 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2022-11-22 02:01:31,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:01:31,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-11-22 02:01:31,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:01:31,777 INFO L225 Difference]: With dead ends: 56 [2022-11-22 02:01:31,777 INFO L226 Difference]: Without dead ends: 56 [2022-11-22 02:01:31,777 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 02:01:31,778 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:01:31,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 55 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:01:31,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-22 02:01:31,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-11-22 02:01:31,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 40 states have internal predecessors, (46), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 02:01:31,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-11-22 02:01:31,786 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 15 [2022-11-22 02:01:31,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:01:31,786 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-11-22 02:01:31,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:01:31,787 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-11-22 02:01:31,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 02:01:31,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:01:31,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:01:31,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:01:31,788 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2022-11-22 02:01:31,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:01:31,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1054594018, now seen corresponding path program 1 times [2022-11-22 02:01:31,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:01:31,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224914539] [2022-11-22 02:01:31,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:31,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:01:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:32,435 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 02:01:32,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:01:32,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224914539] [2022-11-22 02:01:32,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224914539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:01:32,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:01:32,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 02:01:32,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567662143] [2022-11-22 02:01:32,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:01:32,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:01:32,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:01:32,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:01:32,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:01:32,439 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 8 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:01:32,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:01:32,669 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2022-11-22 02:01:32,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:01:32,670 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-11-22 02:01:32,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:01:32,671 INFO L225 Difference]: With dead ends: 61 [2022-11-22 02:01:32,671 INFO L226 Difference]: Without dead ends: 61 [2022-11-22 02:01:32,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:01:32,673 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:01:32,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 91 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:01:32,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-22 02:01:32,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2022-11-22 02:01:32,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 40 states have internal predecessors, (45), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 02:01:32,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2022-11-22 02:01:32,680 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 15 [2022-11-22 02:01:32,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:01:32,681 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2022-11-22 02:01:32,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:01:32,681 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2022-11-22 02:01:32,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 02:01:32,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:01:32,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:01:32,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:01:32,683 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2022-11-22 02:01:32,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:01:32,683 INFO L85 PathProgramCache]: Analyzing trace with hash -799997241, now seen corresponding path program 1 times [2022-11-22 02:01:32,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:01:32,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196973680] [2022-11-22 02:01:32,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:32,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:01:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:32,761 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 02:01:32,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:01:32,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196973680] [2022-11-22 02:01:32,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196973680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:01:32,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:01:32,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:01:32,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929532176] [2022-11-22 02:01:32,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:01:32,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:01:32,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:01:32,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:01:32,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:01:32,765 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:01:32,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:01:32,802 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-11-22 02:01:32,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:01:32,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-11-22 02:01:32,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:01:32,804 INFO L225 Difference]: With dead ends: 55 [2022-11-22 02:01:32,804 INFO L226 Difference]: Without dead ends: 47 [2022-11-22 02:01:32,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:01:32,805 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:01:32,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:01:32,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-22 02:01:32,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-22 02:01:32,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 33 states have internal predecessors, (37), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-22 02:01:32,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-11-22 02:01:32,812 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 15 [2022-11-22 02:01:32,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:01:32,812 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-11-22 02:01:32,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:01:32,812 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-11-22 02:01:32,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 02:01:32,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:01:32,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:01:32,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 02:01:32,814 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2022-11-22 02:01:32,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:01:32,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1667323833, now seen corresponding path program 1 times [2022-11-22 02:01:32,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:01:32,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474797191] [2022-11-22 02:01:32,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:32,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:01:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:33,114 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 02:01:33,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:01:33,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474797191] [2022-11-22 02:01:33,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474797191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:01:33,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:01:33,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 02:01:33,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885153615] [2022-11-22 02:01:33,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:01:33,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 02:01:33,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:01:33,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 02:01:33,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:01:33,117 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:01:33,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:01:33,320 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2022-11-22 02:01:33,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:01:33,321 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-11-22 02:01:33,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:01:33,322 INFO L225 Difference]: With dead ends: 49 [2022-11-22 02:01:33,322 INFO L226 Difference]: Without dead ends: 49 [2022-11-22 02:01:33,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:01:33,324 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:01:33,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 96 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:01:33,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-22 02:01:33,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2022-11-22 02:01:33,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 33 states have internal predecessors, (36), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-22 02:01:33,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-11-22 02:01:33,330 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 16 [2022-11-22 02:01:33,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:01:33,330 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-11-22 02:01:33,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:01:33,331 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-11-22 02:01:33,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 02:01:33,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:01:33,332 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:01:33,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 02:01:33,333 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2022-11-22 02:01:33,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:01:33,333 INFO L85 PathProgramCache]: Analyzing trace with hash 680049768, now seen corresponding path program 1 times [2022-11-22 02:01:33,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:01:33,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820389729] [2022-11-22 02:01:33,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:33,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:01:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:33,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:01:33,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:01:33,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820389729] [2022-11-22 02:01:33,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820389729] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:01:33,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489090195] [2022-11-22 02:01:33,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:33,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:01:33,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:01:33,786 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:01:33,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:01:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:33,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-22 02:01:33,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:01:33,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-22 02:01:34,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2022-11-22 02:01:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:01:34,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:01:36,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:01:36,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489090195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:01:36,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [54993421] [2022-11-22 02:01:36,946 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-22 02:01:36,947 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:01:36,951 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 02:01:36,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:01:36,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 9] total 23 [2022-11-22 02:01:36,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34691221] [2022-11-22 02:01:36,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:01:36,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-22 02:01:36,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:01:36,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-22 02:01:36,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=426, Unknown=1, NotChecked=0, Total=506 [2022-11-22 02:01:36,962 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (12), 8 states have call predecessors, (12), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-22 02:01:37,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:01:37,671 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2022-11-22 02:01:37,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:01:37,672 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (12), 8 states have call predecessors, (12), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2022-11-22 02:01:37,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:01:37,673 INFO L225 Difference]: With dead ends: 55 [2022-11-22 02:01:37,673 INFO L226 Difference]: Without dead ends: 55 [2022-11-22 02:01:37,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=174, Invalid=817, Unknown=1, NotChecked=0, Total=992 [2022-11-22 02:01:37,674 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 152 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:01:37,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 94 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:01:37,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-22 02:01:37,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-11-22 02:01:37,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 32 states have (on average 1.25) internal successors, (40), 37 states have internal predecessors, (40), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-22 02:01:37,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2022-11-22 02:01:37,679 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 23 [2022-11-22 02:01:37,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:01:37,679 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2022-11-22 02:01:37,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (12), 8 states have call predecessors, (12), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-22 02:01:37,680 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2022-11-22 02:01:37,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-22 02:01:37,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:01:37,681 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:01:37,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-22 02:01:37,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:01:37,889 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting checkErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2022-11-22 02:01:37,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:01:37,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1696136072, now seen corresponding path program 1 times [2022-11-22 02:01:37,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:01:37,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200370442] [2022-11-22 02:01:37,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:37,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:01:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:01:38,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:01:38,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200370442] [2022-11-22 02:01:38,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200370442] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:01:38,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845854614] [2022-11-22 02:01:38,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:38,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:01:38,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:01:38,158 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:01:38,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:01:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:38,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:01:38,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:01:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:01:38,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:01:38,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2022-11-22 02:01:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:01:38,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845854614] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:01:38,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [978460664] [2022-11-22 02:01:38,856 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 02:01:38,856 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:01:38,857 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 02:01:38,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:01:38,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-11-22 02:01:38,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908784100] [2022-11-22 02:01:38,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:01:38,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:01:38,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:01:38,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:01:38,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:01:38,860 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 20 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-22 02:01:39,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:01:39,319 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-11-22 02:01:39,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 02:01:39,320 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 26 [2022-11-22 02:01:39,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:01:39,321 INFO L225 Difference]: With dead ends: 55 [2022-11-22 02:01:39,321 INFO L226 Difference]: Without dead ends: 55 [2022-11-22 02:01:39,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-11-22 02:01:39,322 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 93 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:01:39,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 129 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:01:39,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-22 02:01:39,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2022-11-22 02:01:39,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 32 states have (on average 1.1875) internal successors, (38), 36 states have internal predecessors, (38), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-22 02:01:39,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-11-22 02:01:39,327 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 26 [2022-11-22 02:01:39,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:01:39,328 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-11-22 02:01:39,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-22 02:01:39,328 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-11-22 02:01:39,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-22 02:01:39,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:01:39,329 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:01:39,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:01:39,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 02:01:39,545 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2022-11-22 02:01:39,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:01:39,545 INFO L85 PathProgramCache]: Analyzing trace with hash 5819429, now seen corresponding path program 1 times [2022-11-22 02:01:39,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:01:39,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670599235] [2022-11-22 02:01:39,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:39,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:01:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:01:40,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:01:40,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670599235] [2022-11-22 02:01:40,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670599235] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:01:40,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344591162] [2022-11-22 02:01:40,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:40,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:01:40,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:01:40,019 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:01:40,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:01:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:40,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-22 02:01:40,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:01:40,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-22 02:01:40,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:01:40,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2022-11-22 02:01:40,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:01:40,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:01:41,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344591162] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:01:41,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [103127355] [2022-11-22 02:01:41,245 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-22 02:01:41,245 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:01:41,246 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 02:01:41,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:01:41,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2022-11-22 02:01:41,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890107448] [2022-11-22 02:01:41,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:01:41,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-22 02:01:41,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:01:41,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-22 02:01:41,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:01:41,249 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 18 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (9), 7 states have call predecessors, (9), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-22 02:01:42,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:01:42,390 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2022-11-22 02:01:42,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 02:01:42,392 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (9), 7 states have call predecessors, (9), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 26 [2022-11-22 02:01:42,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:01:42,393 INFO L225 Difference]: With dead ends: 70 [2022-11-22 02:01:42,393 INFO L226 Difference]: Without dead ends: 68 [2022-11-22 02:01:42,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2022-11-22 02:01:42,395 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 115 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:01:42,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 222 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:01:42,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-22 02:01:42,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2022-11-22 02:01:42,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.170731707317073) internal successors, (48), 43 states have internal predecessors, (48), 12 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-22 02:01:42,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2022-11-22 02:01:42,400 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 26 [2022-11-22 02:01:42,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:01:42,400 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2022-11-22 02:01:42,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (9), 7 states have call predecessors, (9), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-22 02:01:42,400 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2022-11-22 02:01:42,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 02:01:42,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:01:42,401 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:01:42,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:01:42,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 02:01:42,602 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2022-11-22 02:01:42,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:01:42,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1040609633, now seen corresponding path program 1 times [2022-11-22 02:01:42,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:01:42,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647341032] [2022-11-22 02:01:42,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:42,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:01:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:01:43,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:01:43,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647341032] [2022-11-22 02:01:43,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647341032] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:01:43,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884517186] [2022-11-22 02:01:43,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:43,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:01:43,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:01:43,087 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:01:43,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:01:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:43,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-22 02:01:43,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:01:43,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-22 02:01:43,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2022-11-22 02:01:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:01:43,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:01:44,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-11-22 02:01:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:01:44,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884517186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:01:44,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [896099868] [2022-11-22 02:01:44,943 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-22 02:01:44,943 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:01:44,944 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 02:01:44,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:01:44,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 33 [2022-11-22 02:01:44,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036170137] [2022-11-22 02:01:44,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:01:44,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-22 02:01:44,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:01:44,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-22 02:01:44,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 02:01:44,951 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 34 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 28 states have internal predecessors, (45), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 02:01:46,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:01:46,747 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2022-11-22 02:01:46,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-22 02:01:46,747 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 28 states have internal predecessors, (45), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 27 [2022-11-22 02:01:46,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:01:46,748 INFO L225 Difference]: With dead ends: 75 [2022-11-22 02:01:46,749 INFO L226 Difference]: Without dead ends: 75 [2022-11-22 02:01:46,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=373, Invalid=2177, Unknown=0, NotChecked=0, Total=2550 [2022-11-22 02:01:46,750 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 246 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:01:46,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 184 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 02:01:46,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-22 02:01:46,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2022-11-22 02:01:46,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 47 states have internal predecessors, (51), 13 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-22 02:01:46,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2022-11-22 02:01:46,757 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 27 [2022-11-22 02:01:46,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:01:46,757 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2022-11-22 02:01:46,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 28 states have internal predecessors, (45), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 02:01:46,758 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2022-11-22 02:01:46,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 02:01:46,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:01:46,759 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:01:46,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:01:46,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-22 02:01:46,965 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2022-11-22 02:01:46,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:01:46,965 INFO L85 PathProgramCache]: Analyzing trace with hash 180402276, now seen corresponding path program 1 times [2022-11-22 02:01:46,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:01:46,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658453252] [2022-11-22 02:01:46,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:46,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:01:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:01:47,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:01:47,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658453252] [2022-11-22 02:01:47,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658453252] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:01:47,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592945240] [2022-11-22 02:01:47,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:47,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:01:47,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:01:47,575 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:01:47,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:01:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:47,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-22 02:01:47,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:01:47,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:01:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:01:47,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:01:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:01:48,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592945240] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:01:48,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1056424927] [2022-11-22 02:01:48,512 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-22 02:01:48,512 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:01:48,513 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 02:01:48,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:01:48,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 25 [2022-11-22 02:01:48,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120330119] [2022-11-22 02:01:48,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:01:48,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-22 02:01:48,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:01:48,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-22 02:01:48,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-11-22 02:01:48,518 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 26 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 20 states have internal predecessors, (42), 11 states have call successors, (13), 7 states have call predecessors, (13), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-22 02:01:49,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:01:49,741 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2022-11-22 02:01:49,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 02:01:49,742 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 20 states have internal predecessors, (42), 11 states have call successors, (13), 7 states have call predecessors, (13), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 27 [2022-11-22 02:01:49,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:01:49,743 INFO L225 Difference]: With dead ends: 88 [2022-11-22 02:01:49,743 INFO L226 Difference]: Without dead ends: 88 [2022-11-22 02:01:49,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2022-11-22 02:01:49,745 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 236 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:01:49,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 176 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:01:49,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-22 02:01:49,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2022-11-22 02:01:49,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 57 states have internal predecessors, (62), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (18), 18 states have call predecessors, (18), 15 states have call successors, (18) [2022-11-22 02:01:49,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2022-11-22 02:01:49,752 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 27 [2022-11-22 02:01:49,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:01:49,753 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2022-11-22 02:01:49,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 20 states have internal predecessors, (42), 11 states have call successors, (13), 7 states have call predecessors, (13), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-22 02:01:49,753 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2022-11-22 02:01:49,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-22 02:01:49,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:01:49,755 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:01:49,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:01:49,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-22 02:01:49,961 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2022-11-22 02:01:49,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:01:49,962 INFO L85 PathProgramCache]: Analyzing trace with hash -119215993, now seen corresponding path program 1 times [2022-11-22 02:01:49,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:01:49,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080714056] [2022-11-22 02:01:49,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:49,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:01:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:50,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:01:50,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:01:50,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080714056] [2022-11-22 02:01:50,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080714056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:01:50,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257727654] [2022-11-22 02:01:50,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:50,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:01:50,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:01:50,170 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:01:50,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:01:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:50,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 02:01:50,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:01:50,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-22 02:01:50,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-11-22 02:01:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:01:50,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:01:52,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257727654] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:01:52,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [38409397] [2022-11-22 02:01:52,761 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-22 02:01:52,761 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:01:52,762 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 02:01:52,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:01:52,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2022-11-22 02:01:52,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589320009] [2022-11-22 02:01:52,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:01:52,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-22 02:01:52,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:01:52,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-22 02:01:52,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-11-22 02:01:52,765 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 19 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-22 02:01:53,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:01:53,182 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2022-11-22 02:01:53,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 02:01:53,183 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 31 [2022-11-22 02:01:53,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:01:53,184 INFO L225 Difference]: With dead ends: 84 [2022-11-22 02:01:53,184 INFO L226 Difference]: Without dead ends: 72 [2022-11-22 02:01:53,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-11-22 02:01:53,185 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:01:53,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 71 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:01:53,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-22 02:01:53,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-11-22 02:01:53,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (16), 16 states have call predecessors, (16), 14 states have call successors, (16) [2022-11-22 02:01:53,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-11-22 02:01:53,191 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 31 [2022-11-22 02:01:53,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:01:53,191 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-11-22 02:01:53,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-22 02:01:53,192 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-11-22 02:01:53,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-22 02:01:53,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:01:53,193 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:01:53,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:01:53,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 02:01:53,403 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2022-11-22 02:01:53,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:01:53,403 INFO L85 PathProgramCache]: Analyzing trace with hash 842353375, now seen corresponding path program 1 times [2022-11-22 02:01:53,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:01:53,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206489758] [2022-11-22 02:01:53,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:53,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:01:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-22 02:01:54,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:01:54,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206489758] [2022-11-22 02:01:54,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206489758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:01:54,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138270544] [2022-11-22 02:01:54,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:54,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:01:54,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:01:54,637 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:01:54,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:01:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:54,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 02:01:54,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:01:54,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:01:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:01:55,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:01:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 02:01:55,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138270544] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:01:55,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [407123431] [2022-11-22 02:01:55,657 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-22 02:01:55,657 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:01:55,658 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 02:01:55,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:01:55,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7, 6] total 25 [2022-11-22 02:01:55,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400472266] [2022-11-22 02:01:55,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:01:55,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-22 02:01:55,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:01:55,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-22 02:01:55,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2022-11-22 02:01:55,665 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 26 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 13 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (20), 13 states have call predecessors, (20), 12 states have call successors, (20) [2022-11-22 02:01:57,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:01:59,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:01:59,582 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2022-11-22 02:01:59,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-22 02:01:59,583 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 13 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (20), 13 states have call predecessors, (20), 12 states have call successors, (20) Word has length 52 [2022-11-22 02:01:59,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:01:59,584 INFO L225 Difference]: With dead ends: 83 [2022-11-22 02:01:59,584 INFO L226 Difference]: Without dead ends: 0 [2022-11-22 02:01:59,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=296, Invalid=1774, Unknown=0, NotChecked=0, Total=2070 [2022-11-22 02:01:59,586 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 89 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:01:59,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 190 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 590 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-22 02:01:59,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-22 02:01:59,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-22 02:01:59,587 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 02:01:59,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-22 02:01:59,587 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 52 [2022-11-22 02:01:59,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:01:59,587 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-22 02:01:59,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 13 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (20), 13 states have call predecessors, (20), 12 states have call successors, (20) [2022-11-22 02:01:59,588 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-22 02:01:59,588 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-22 02:01:59,590 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE (12 of 13 remaining) [2022-11-22 02:01:59,594 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE (11 of 13 remaining) [2022-11-22 02:01:59,595 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (10 of 13 remaining) [2022-11-22 02:01:59,595 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (9 of 13 remaining) [2022-11-22 02:01:59,595 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2022-11-22 02:01:59,595 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2022-11-22 02:01:59,596 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 13 remaining) [2022-11-22 02:01:59,596 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2022-11-22 02:01:59,596 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2022-11-22 02:01:59,596 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 13 remaining) [2022-11-22 02:01:59,597 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining) [2022-11-22 02:01:59,597 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2022-11-22 02:01:59,597 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2022-11-22 02:01:59,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:01:59,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 02:01:59,807 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:01:59,810 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-22 02:01:59,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 02:01:59 BoogieIcfgContainer [2022-11-22 02:01:59,817 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-22 02:01:59,817 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-22 02:01:59,817 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-22 02:01:59,818 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-22 02:01:59,818 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:01:29" (3/4) ... [2022-11-22 02:01:59,822 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-22 02:01:59,828 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2022-11-22 02:01:59,829 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2022-11-22 02:01:59,829 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-22 02:01:59,840 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 28 nodes and edges [2022-11-22 02:01:59,841 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2022-11-22 02:01:59,842 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-22 02:01:59,842 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-22 02:01:59,887 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/bin/utaipan-g80aRyZoba/witness.graphml [2022-11-22 02:01:59,888 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-22 02:01:59,888 INFO L158 Benchmark]: Toolchain (without parser) took 31092.32ms. Allocated memory was 167.8MB in the beginning and 289.4MB in the end (delta: 121.6MB). Free memory was 134.4MB in the beginning and 102.8MB in the end (delta: 31.6MB). Peak memory consumption was 154.9MB. Max. memory is 16.1GB. [2022-11-22 02:01:59,889 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 167.8MB. Free memory was 109.4MB in the beginning and 109.3MB in the end (delta: 48.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 02:01:59,890 INFO L158 Benchmark]: CACSL2BoogieTranslator took 250.01ms. Allocated memory is still 167.8MB. Free memory was 133.9MB in the beginning and 123.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-22 02:01:59,891 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.29ms. Allocated memory is still 167.8MB. Free memory was 123.4MB in the beginning and 122.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 02:01:59,892 INFO L158 Benchmark]: Boogie Preprocessor took 24.17ms. Allocated memory is still 167.8MB. Free memory was 122.0MB in the beginning and 120.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 02:01:59,892 INFO L158 Benchmark]: RCFGBuilder took 698.01ms. Allocated memory is still 167.8MB. Free memory was 120.4MB in the beginning and 104.6MB in the end (delta: 15.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-22 02:01:59,896 INFO L158 Benchmark]: TraceAbstraction took 30007.61ms. Allocated memory was 167.8MB in the beginning and 289.4MB in the end (delta: 121.6MB). Free memory was 103.6MB in the beginning and 105.7MB in the end (delta: -2.0MB). Peak memory consumption was 121.3MB. Max. memory is 16.1GB. [2022-11-22 02:01:59,896 INFO L158 Benchmark]: Witness Printer took 70.51ms. Allocated memory is still 289.4MB. Free memory was 105.7MB in the beginning and 102.8MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 02:01:59,900 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 167.8MB. Free memory was 109.4MB in the beginning and 109.3MB in the end (delta: 48.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 250.01ms. Allocated memory is still 167.8MB. Free memory was 133.9MB in the beginning and 123.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.29ms. Allocated memory is still 167.8MB. Free memory was 123.4MB in the beginning and 122.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.17ms. Allocated memory is still 167.8MB. Free memory was 122.0MB in the beginning and 120.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 698.01ms. Allocated memory is still 167.8MB. Free memory was 120.4MB in the beginning and 104.6MB in the end (delta: 15.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 30007.61ms. Allocated memory was 167.8MB in the beginning and 289.4MB in the end (delta: 121.6MB). Free memory was 103.6MB in the beginning and 105.7MB in the end (delta: -2.0MB). Peak memory consumption was 121.3MB. Max. memory is 16.1GB. * Witness Printer took 70.51ms. Allocated memory is still 289.4MB. Free memory was 105.7MB in the beginning and 102.8MB in the end (delta: 2.9MB). 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: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 41]: all allocated memory was freed For all program executions holds that all allocated memory was freed 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: -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: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: 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 4 procedures, 45 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 29.9s, OverallIterations: 15, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 10.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 1133 SdHoareTripleChecker+Valid, 5.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1122 mSDsluCounter, 1751 SdHoareTripleChecker+Invalid, 5.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1371 mSDsCounter, 515 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3581 IncrementalHoareTripleChecker+Invalid, 4097 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 515 mSolverCounterUnsat, 380 mSDtfsCounter, 3581 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 591 GetRequests, 296 SyntacticMatches, 18 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 13.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=86occurred in iteration=13, InterpolantAutomatonStates: 163, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 33 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 16.1s InterpolantComputationTime, 536 NumberOfCodeBlocks, 536 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 664 ConstructedInterpolants, 48 QuantifiedInterpolants, 6068 SizeOfPredicates, 95 NumberOfNonLiveVariables, 1190 ConjunctsInSsa, 196 ConjunctsInUnsatCore, 27 InterpolantComputations, 8 PerfectInterpolantSequences, 119/204 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 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-22 02:01:59,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b93cc5-608c-4c66-9093-8e03d28f32c5/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