./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/length_test03-1.i --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_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/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_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/length_test03-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/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_bc0128db-b202-4632-a722-0cbcaf6c1da2/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 6e9221de91e231efa38b63f264828813e89f68c8ac306a629b3513c0e7bf1ed0 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 01:39:29,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:39:29,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:39:29,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:39:29,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:39:29,858 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:39:29,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:39:29,862 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:39:29,865 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:39:29,866 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:39:29,867 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:39:29,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:39:29,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:39:29,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:39:29,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:39:29,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:39:29,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:39:29,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:39:29,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:39:29,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:39:29,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:39:29,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:39:29,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:39:29,891 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:39:29,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:39:29,897 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:39:29,898 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:39:29,900 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:39:29,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:39:29,903 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:39:29,903 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:39:29,905 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:39:29,906 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:39:29,907 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:39:29,909 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:39:29,910 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:39:29,911 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:39:29,912 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:39:29,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:39:29,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:39:29,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:39:29,916 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 01:39:29,969 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:39:29,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:39:29,971 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:39:29,972 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:39:29,973 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:39:29,973 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:39:29,973 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:39:29,974 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:39:29,974 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:39:29,974 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:39:29,976 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:39:29,976 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:39:29,976 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:39:29,977 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:39:29,977 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:39:29,977 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:39:29,978 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:39:29,978 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:39:29,979 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 01:39:29,979 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 01:39:29,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:39:29,980 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:39:29,980 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:39:29,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:39:29,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:39:29,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:39:29,982 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 01:39:29,982 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 01:39:29,983 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 01:39:29,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:39:29,983 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 01:39:29,984 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:39:29,984 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:39:29,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:39:29,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:39:29,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:39:29,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:39:29,985 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:39:29,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:39:29,986 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:39:29,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:39:29,987 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:39:29,988 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_bc0128db-b202-4632-a722-0cbcaf6c1da2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e9221de91e231efa38b63f264828813e89f68c8ac306a629b3513c0e7bf1ed0 [2022-11-22 01:39:30,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:39:30,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:39:30,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:39:30,431 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:39:30,432 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:39:30,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/memsafety-ext2/length_test03-1.i [2022-11-22 01:39:33,981 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:39:34,281 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:39:34,282 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/sv-benchmarks/c/memsafety-ext2/length_test03-1.i [2022-11-22 01:39:34,297 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/data/989a05c02/10773161a872458d8f1ecaa3e273e20a/FLAGd7fc9b00a [2022-11-22 01:39:34,315 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/data/989a05c02/10773161a872458d8f1ecaa3e273e20a [2022-11-22 01:39:34,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:39:34,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:39:34,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:39:34,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:39:34,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:39:34,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:39:34" (1/1) ... [2022-11-22 01:39:34,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48f33585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:39:34, skipping insertion in model container [2022-11-22 01:39:34,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:39:34" (1/1) ... [2022-11-22 01:39:34,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:39:34,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:39:34,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:39:34,818 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:39:34,917 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:39:34,969 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:39:34,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:39:34 WrapperNode [2022-11-22 01:39:34,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:39:34,973 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:39:34,974 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:39:34,974 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:39:34,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:39:34" (1/1) ... [2022-11-22 01:39:35,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:39:34" (1/1) ... [2022-11-22 01:39:35,066 INFO L138 Inliner]: procedures = 123, calls = 38, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 98 [2022-11-22 01:39:35,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:39:35,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:39:35,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:39:35,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:39:35,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:39:34" (1/1) ... [2022-11-22 01:39:35,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:39:34" (1/1) ... [2022-11-22 01:39:35,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:39:34" (1/1) ... [2022-11-22 01:39:35,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:39:34" (1/1) ... [2022-11-22 01:39:35,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:39:34" (1/1) ... [2022-11-22 01:39:35,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:39:34" (1/1) ... [2022-11-22 01:39:35,133 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:39:34" (1/1) ... [2022-11-22 01:39:35,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:39:34" (1/1) ... [2022-11-22 01:39:35,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:39:35,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:39:35,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:39:35,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:39:35,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:39:34" (1/1) ... [2022-11-22 01:39:35,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:39:35,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:35,189 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:39:35,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:39:35,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:39:35,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 01:39:35,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:39:35,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-22 01:39:35,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-22 01:39:35,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:39:35,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:39:35,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:39:35,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:39:35,258 INFO L130 BoogieDeclarations]: Found specification of procedure append [2022-11-22 01:39:35,258 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2022-11-22 01:39:35,416 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:39:35,418 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:39:36,034 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:39:36,146 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:39:36,146 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-22 01:39:36,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:39:36 BoogieIcfgContainer [2022-11-22 01:39:36,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:39:36,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:39:36,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:39:36,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:39:36,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:39:34" (1/3) ... [2022-11-22 01:39:36,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3718a6dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:39:36, skipping insertion in model container [2022-11-22 01:39:36,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:39:34" (2/3) ... [2022-11-22 01:39:36,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3718a6dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:39:36, skipping insertion in model container [2022-11-22 01:39:36,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:39:36" (3/3) ... [2022-11-22 01:39:36,161 INFO L112 eAbstractionObserver]: Analyzing ICFG length_test03-1.i [2022-11-22 01:39:36,184 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:39:36,185 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2022-11-22 01:39:36,249 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:39:36,257 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;@9b54010, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:39:36,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2022-11-22 01:39:36,263 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 49 states have (on average 2.3469387755102042) internal successors, (115), 108 states have internal predecessors, (115), 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 01:39:36,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:39:36,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:36,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:39:36,270 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-22 01:39:36,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:36,276 INFO L85 PathProgramCache]: Analyzing trace with hash 6824, now seen corresponding path program 1 times [2022-11-22 01:39:36,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:36,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862494400] [2022-11-22 01:39:36,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:36,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:39:36,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:36,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862494400] [2022-11-22 01:39:36,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862494400] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:36,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:39:36,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:39:36,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594686441] [2022-11-22 01:39:36,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:36,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:39:36,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:36,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:39:36,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:39:36,634 INFO L87 Difference]: Start difference. First operand has 112 states, 49 states have (on average 2.3469387755102042) internal successors, (115), 108 states have internal predecessors, (115), 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) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:36,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:36,917 INFO L93 Difference]: Finished difference Result 144 states and 153 transitions. [2022-11-22 01:39:36,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:39:36,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-22 01:39:36,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:36,951 INFO L225 Difference]: With dead ends: 144 [2022-11-22 01:39:36,951 INFO L226 Difference]: Without dead ends: 143 [2022-11-22 01:39:36,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:39:36,957 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 44 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:36,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 131 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:39:36,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-22 01:39:37,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 109. [2022-11-22 01:39:37,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 105 states have internal predecessors, (111), 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 01:39:37,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2022-11-22 01:39:37,060 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 2 [2022-11-22 01:39:37,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:37,061 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2022-11-22 01:39:37,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:37,062 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2022-11-22 01:39:37,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:39:37,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:37,062 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:39:37,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:39:37,063 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-22 01:39:37,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:37,064 INFO L85 PathProgramCache]: Analyzing trace with hash 6825, now seen corresponding path program 1 times [2022-11-22 01:39:37,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:37,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650882718] [2022-11-22 01:39:37,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:37,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:39:37,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:37,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650882718] [2022-11-22 01:39:37,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650882718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:37,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:39:37,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:39:37,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826770033] [2022-11-22 01:39:37,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:37,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:39:37,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:37,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:39:37,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:39:37,252 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:37,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:37,441 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2022-11-22 01:39:37,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:39:37,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-22 01:39:37,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:37,452 INFO L225 Difference]: With dead ends: 109 [2022-11-22 01:39:37,454 INFO L226 Difference]: Without dead ends: 109 [2022-11-22 01:39:37,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:39:37,457 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 8 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:37,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 146 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:39:37,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-22 01:39:37,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2022-11-22 01:39:37,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 103 states have internal predecessors, (109), 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 01:39:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2022-11-22 01:39:37,485 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 2 [2022-11-22 01:39:37,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:37,486 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2022-11-22 01:39:37,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:37,488 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2022-11-22 01:39:37,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 01:39:37,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:37,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 01:39:37,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:39:37,489 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-22 01:39:37,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:37,493 INFO L85 PathProgramCache]: Analyzing trace with hash 6562959, now seen corresponding path program 1 times [2022-11-22 01:39:37,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:37,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283022885] [2022-11-22 01:39:37,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:37,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:39:37,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:37,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283022885] [2022-11-22 01:39:37,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283022885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:37,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:39:37,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:39:37,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961083347] [2022-11-22 01:39:37,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:37,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:39:37,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:37,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:39:37,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:39:37,638 INFO L87 Difference]: Start difference. First operand 107 states and 113 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:37,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:37,804 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2022-11-22 01:39:37,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:39:37,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-22 01:39:37,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:37,808 INFO L225 Difference]: With dead ends: 122 [2022-11-22 01:39:37,809 INFO L226 Difference]: Without dead ends: 122 [2022-11-22 01:39:37,810 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 01:39:37,812 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 22 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:37,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 133 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:39:37,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-22 01:39:37,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 109. [2022-11-22 01:39:37,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 53 states have (on average 2.150943396226415) internal successors, (114), 105 states have internal predecessors, (114), 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 01:39:37,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 118 transitions. [2022-11-22 01:39:37,839 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 118 transitions. Word has length 4 [2022-11-22 01:39:37,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:37,840 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 118 transitions. [2022-11-22 01:39:37,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:37,840 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 118 transitions. [2022-11-22 01:39:37,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 01:39:37,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:37,841 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 01:39:37,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:39:37,842 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-22 01:39:37,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:37,850 INFO L85 PathProgramCache]: Analyzing trace with hash 6562960, now seen corresponding path program 1 times [2022-11-22 01:39:37,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:37,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861581406] [2022-11-22 01:39:37,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:37,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:39:38,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:38,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861581406] [2022-11-22 01:39:38,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861581406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:38,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:39:38,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:39:38,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493659721] [2022-11-22 01:39:38,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:38,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:39:38,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:38,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:39:38,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:39:38,091 INFO L87 Difference]: Start difference. First operand 109 states and 118 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:38,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:38,251 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2022-11-22 01:39:38,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:39:38,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-22 01:39:38,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:38,253 INFO L225 Difference]: With dead ends: 109 [2022-11-22 01:39:38,253 INFO L226 Difference]: Without dead ends: 109 [2022-11-22 01:39:38,254 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 01:39:38,263 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 3 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:38,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 144 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:39:38,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-22 01:39:38,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2022-11-22 01:39:38,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 103 states have internal predecessors, (112), 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 01:39:38,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2022-11-22 01:39:38,277 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 4 [2022-11-22 01:39:38,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:38,277 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2022-11-22 01:39:38,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:38,278 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2022-11-22 01:39:38,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:39:38,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:38,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:38,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:39:38,280 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-22 01:39:38,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:38,281 INFO L85 PathProgramCache]: Analyzing trace with hash 152914734, now seen corresponding path program 1 times [2022-11-22 01:39:38,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:38,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051767886] [2022-11-22 01:39:38,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:38,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:38,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:39:38,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:38,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051767886] [2022-11-22 01:39:38,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051767886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:38,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:39:38,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:39:38,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930495748] [2022-11-22 01:39:38,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:38,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:39:38,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:38,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:39:38,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:39:38,457 INFO L87 Difference]: Start difference. First operand 107 states and 116 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:38,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:38,578 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2022-11-22 01:39:38,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:39:38,580 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-22 01:39:38,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:38,585 INFO L225 Difference]: With dead ends: 102 [2022-11-22 01:39:38,586 INFO L226 Difference]: Without dead ends: 102 [2022-11-22 01:39:38,586 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 01:39:38,592 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 39 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:38,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 106 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:39:38,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-22 01:39:38,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-22 01:39:38,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 53 states have (on average 2.018867924528302) internal successors, (107), 98 states have internal predecessors, (107), 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 01:39:38,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2022-11-22 01:39:38,617 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 9 [2022-11-22 01:39:38,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:38,618 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2022-11-22 01:39:38,618 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:38,618 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2022-11-22 01:39:38,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:39:38,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:38,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:38,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:39:38,620 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-22 01:39:38,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:38,620 INFO L85 PathProgramCache]: Analyzing trace with hash 152914733, now seen corresponding path program 1 times [2022-11-22 01:39:38,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:38,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624478655] [2022-11-22 01:39:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:38,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:39:38,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:38,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624478655] [2022-11-22 01:39:38,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624478655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:38,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:39:38,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:39:38,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783664029] [2022-11-22 01:39:38,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:38,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:39:38,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:38,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:39:38,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:39:38,754 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:38,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:38,872 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2022-11-22 01:39:38,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:39:38,873 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-22 01:39:38,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:38,874 INFO L225 Difference]: With dead ends: 97 [2022-11-22 01:39:38,874 INFO L226 Difference]: Without dead ends: 97 [2022-11-22 01:39:38,875 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 01:39:38,876 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 34 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:38,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 98 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:39:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-22 01:39:38,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-11-22 01:39:38,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 93 states have internal predecessors, (102), 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 01:39:38,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2022-11-22 01:39:38,904 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 9 [2022-11-22 01:39:38,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:38,905 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2022-11-22 01:39:38,905 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:38,906 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2022-11-22 01:39:38,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:39:38,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:38,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:38,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:39:38,907 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-22 01:39:38,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:38,908 INFO L85 PathProgramCache]: Analyzing trace with hash 445389526, now seen corresponding path program 1 times [2022-11-22 01:39:38,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:38,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107638722] [2022-11-22 01:39:38,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:38,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:39:39,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:39,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107638722] [2022-11-22 01:39:39,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107638722] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:39,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:39:39,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:39:39,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674803893] [2022-11-22 01:39:39,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:39,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:39:39,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:39,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:39:39,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:39:39,300 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:39,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:39,660 INFO L93 Difference]: Finished difference Result 191 states and 208 transitions. [2022-11-22 01:39:39,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:39:39,661 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-22 01:39:39,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:39,663 INFO L225 Difference]: With dead ends: 191 [2022-11-22 01:39:39,663 INFO L226 Difference]: Without dead ends: 191 [2022-11-22 01:39:39,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:39:39,664 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 204 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:39,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 166 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:39:39,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-22 01:39:39,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 122. [2022-11-22 01:39:39,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 83 states have (on average 1.819277108433735) internal successors, (151), 117 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:39:39,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 155 transitions. [2022-11-22 01:39:39,676 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 155 transitions. Word has length 10 [2022-11-22 01:39:39,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:39,677 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 155 transitions. [2022-11-22 01:39:39,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:39,677 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 155 transitions. [2022-11-22 01:39:39,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:39:39,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:39,678 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:39,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 01:39:39,679 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-22 01:39:39,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:39,682 INFO L85 PathProgramCache]: Analyzing trace with hash 445389527, now seen corresponding path program 1 times [2022-11-22 01:39:39,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:39,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820786295] [2022-11-22 01:39:39,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:39,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:40,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:39:40,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:40,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820786295] [2022-11-22 01:39:40,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820786295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:40,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:39:40,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:39:40,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973206452] [2022-11-22 01:39:40,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:40,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:39:40,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:40,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:39:40,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:39:40,213 INFO L87 Difference]: Start difference. First operand 122 states and 155 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:40,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:40,605 INFO L93 Difference]: Finished difference Result 197 states and 216 transitions. [2022-11-22 01:39:40,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:39:40,606 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-22 01:39:40,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:40,608 INFO L225 Difference]: With dead ends: 197 [2022-11-22 01:39:40,608 INFO L226 Difference]: Without dead ends: 197 [2022-11-22 01:39:40,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:39:40,609 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 257 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:40,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 155 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:39:40,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-22 01:39:40,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 142. [2022-11-22 01:39:40,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 103 states have (on average 1.7864077669902914) internal successors, (184), 137 states have internal predecessors, (184), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:39:40,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 188 transitions. [2022-11-22 01:39:40,630 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 188 transitions. Word has length 10 [2022-11-22 01:39:40,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:40,630 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 188 transitions. [2022-11-22 01:39:40,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:40,631 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 188 transitions. [2022-11-22 01:39:40,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-22 01:39:40,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:40,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:40,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 01:39:40,633 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-22 01:39:40,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:40,634 INFO L85 PathProgramCache]: Analyzing trace with hash -679097844, now seen corresponding path program 1 times [2022-11-22 01:39:40,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:40,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280678007] [2022-11-22 01:39:40,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:40,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:39:41,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:41,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280678007] [2022-11-22 01:39:41,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280678007] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:41,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:39:41,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 01:39:41,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937771053] [2022-11-22 01:39:41,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:41,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:39:41,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:41,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:39:41,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:39:41,343 INFO L87 Difference]: Start difference. First operand 142 states and 188 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:41,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:41,625 INFO L93 Difference]: Finished difference Result 158 states and 206 transitions. [2022-11-22 01:39:41,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 01:39:41,626 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-22 01:39:41,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:41,627 INFO L225 Difference]: With dead ends: 158 [2022-11-22 01:39:41,627 INFO L226 Difference]: Without dead ends: 158 [2022-11-22 01:39:41,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:39:41,628 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 21 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:41,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 276 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:39:41,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-22 01:39:41,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2022-11-22 01:39:41,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 108 states have (on average 1.75) internal successors, (189), 142 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 01:39:41,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 195 transitions. [2022-11-22 01:39:41,640 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 195 transitions. Word has length 17 [2022-11-22 01:39:41,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:41,641 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 195 transitions. [2022-11-22 01:39:41,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:41,642 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 195 transitions. [2022-11-22 01:39:41,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 01:39:41,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:41,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:41,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 01:39:41,643 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-22 01:39:41,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:41,644 INFO L85 PathProgramCache]: Analyzing trace with hash -360261382, now seen corresponding path program 1 times [2022-11-22 01:39:41,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:41,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218455777] [2022-11-22 01:39:41,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:41,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:39:42,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:42,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218455777] [2022-11-22 01:39:42,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218455777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:42,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:39:42,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 01:39:42,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414595227] [2022-11-22 01:39:42,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:42,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:39:42,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:42,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:39:42,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:39:42,391 INFO L87 Difference]: Start difference. First operand 148 states and 195 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:42,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:42,759 INFO L93 Difference]: Finished difference Result 152 states and 199 transitions. [2022-11-22 01:39:42,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:39:42,763 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-22 01:39:42,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:42,765 INFO L225 Difference]: With dead ends: 152 [2022-11-22 01:39:42,765 INFO L226 Difference]: Without dead ends: 152 [2022-11-22 01:39:42,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:39:42,766 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 8 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:42,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 306 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:39:42,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-22 01:39:42,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2022-11-22 01:39:42,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 110 states have (on average 1.7363636363636363) internal successors, (191), 144 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 01:39:42,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 197 transitions. [2022-11-22 01:39:42,773 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 197 transitions. Word has length 18 [2022-11-22 01:39:42,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:42,773 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 197 transitions. [2022-11-22 01:39:42,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:42,774 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 197 transitions. [2022-11-22 01:39:42,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 01:39:42,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:42,775 INFO L195 NwaCegarLoop]: trace histogram [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 01:39:42,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 01:39:42,776 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-22 01:39:42,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:42,776 INFO L85 PathProgramCache]: Analyzing trace with hash -264587606, now seen corresponding path program 1 times [2022-11-22 01:39:42,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:42,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621070840] [2022-11-22 01:39:42,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:42,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:39:42,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:42,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621070840] [2022-11-22 01:39:42,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621070840] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:42,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:39:42,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:39:42,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395239546] [2022-11-22 01:39:42,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:42,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:39:42,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:42,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:39:42,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:39:42,864 INFO L87 Difference]: Start difference. First operand 150 states and 197 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:39:42,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:42,914 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2022-11-22 01:39:42,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:39:42,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-11-22 01:39:42,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:42,916 INFO L225 Difference]: With dead ends: 126 [2022-11-22 01:39:42,917 INFO L226 Difference]: Without dead ends: 126 [2022-11-22 01:39:42,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:39:42,918 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 10 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:42,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 146 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:39:42,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-22 01:39:42,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 115. [2022-11-22 01:39:42,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 75 states have (on average 1.5866666666666667) internal successors, (119), 109 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 01:39:42,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2022-11-22 01:39:42,924 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 25 [2022-11-22 01:39:42,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:42,924 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2022-11-22 01:39:42,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:39:42,925 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2022-11-22 01:39:42,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 01:39:42,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:42,926 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 01:39:42,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 01:39:42,926 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-22 01:39:42,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:42,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1012682462, now seen corresponding path program 1 times [2022-11-22 01:39:42,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:42,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232280733] [2022-11-22 01:39:42,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:42,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:39:43,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:43,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232280733] [2022-11-22 01:39:43,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232280733] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:39:43,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607719035] [2022-11-22 01:39:43,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:43,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:43,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:43,371 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:43,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:39:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:43,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:39:43,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:43,698 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 01:39:43,755 WARN L859 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base Int)) (= |c_#valid| (store |c_old(#valid)| append_~node~0.base 1))) is different from true [2022-11-22 01:39:43,868 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 01:39:43,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-22 01:39:43,935 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 01:39:43,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-22 01:39:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-22 01:39:43,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:39:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:39:44,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607719035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:39:44,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [203771301] [2022-11-22 01:39:44,296 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-22 01:39:44,296 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:39:44,301 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:39:44,308 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:39:44,308 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:39:44,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 01:39:44,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:39:44,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-22 01:39:44,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:39:44,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 01:39:44,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 01:39:44,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 01:39:44,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-22 01:39:44,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-22 01:39:44,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 01:39:44,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 01:39:44,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-22 01:39:44,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-22 01:39:44,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 01:39:44,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:44,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:39:44,904 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-22 01:39:44,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2022-11-22 01:39:44,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 01:39:44,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:39:44,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 01:39:44,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 01:39:44,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:39:45,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-22 01:39:45,066 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-11-22 01:39:45,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-22 01:39:45,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-22 01:39:45,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2022-11-22 01:39:45,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-11-22 01:39:45,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2022-11-22 01:39:45,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-11-22 01:39:45,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,172 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-22 01:39:45,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-22 01:39:45,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,209 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-22 01:39:45,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 42 [2022-11-22 01:39:45,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,261 INFO L321 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2022-11-22 01:39:45,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2022-11-22 01:39:45,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,316 INFO L321 Elim1Store]: treesize reduction 62, result has 30.3 percent of original size [2022-11-22 01:39:45,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 64 [2022-11-22 01:39:45,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-11-22 01:39:45,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-22 01:39:45,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-22 01:39:45,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-22 01:39:45,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,552 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-22 01:39:45,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2022-11-22 01:39:45,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-22 01:39:45,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-22 01:39:45,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-22 01:39:45,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:45,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:39:45,832 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-22 01:39:45,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2022-11-22 01:39:45,862 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 105 for LOIs [2022-11-22 01:39:47,550 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:39:58,254 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3163#(and (= 0 (select |old(#valid)| append_~node~0.base)) (= |append_#in~head.offset| append_~head.offset) (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.offset| append_~node~0.base) append_~node~0.offset)))) (= |#memory_int| (store |old(#memory_int)| append_~node~0.base (store (select |old(#memory_int)| append_~node~0.base) append_~node~0.offset append_~input))) (not (= append_~node~0.base 0)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (< append_~node~0.base |#StackHeapBarrier|) (= (store |old(#length)| append_~node~0.base 9) |#length|) (= |append_#in~head.offset| 0) (= append_~head.base |append_#in~head.base|) (= |#memory_$Pointer$.base| (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.base| append_~node~0.base) append_~node~0.offset)))) (= |#NULL.offset| 0) (= |#valid| (store |old(#valid)| append_~node~0.base 1)) (= append_~input |append_#in~input|) (<= |append_#in~input| 127) (not (= (select |#valid| append_~head.base) 1)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:39:58,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:39:58,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:39:58,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 10 [2022-11-22 01:39:58,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345271411] [2022-11-22 01:39:58,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:39:58,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 01:39:58,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:58,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 01:39:58,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=844, Unknown=1, NotChecked=60, Total=1056 [2022-11-22 01:39:58,258 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 11 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 1 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 01:39:58,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:58,911 INFO L93 Difference]: Finished difference Result 151 states and 164 transitions. [2022-11-22 01:39:58,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:39:58,916 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 1 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-11-22 01:39:58,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:58,917 INFO L225 Difference]: With dead ends: 151 [2022-11-22 01:39:58,917 INFO L226 Difference]: Without dead ends: 151 [2022-11-22 01:39:58,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=242, Invalid=1167, Unknown=1, NotChecked=72, Total=1482 [2022-11-22 01:39:58,922 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 142 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:58,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 292 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 402 Invalid, 0 Unknown, 108 Unchecked, 0.4s Time] [2022-11-22 01:39:58,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-22 01:39:58,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 123. [2022-11-22 01:39:58,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 83 states have (on average 1.5542168674698795) internal successors, (129), 117 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-22 01:39:58,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2022-11-22 01:39:58,931 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 27 [2022-11-22 01:39:58,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:58,934 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2022-11-22 01:39:58,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 1 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 01:39:58,935 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2022-11-22 01:39:58,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 01:39:58,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:58,936 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 01:39:58,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:39:59,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:59,148 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-22 01:39:59,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:59,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1012682461, now seen corresponding path program 1 times [2022-11-22 01:39:59,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:59,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868664344] [2022-11-22 01:39:59,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:59,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:39:59,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:59,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868664344] [2022-11-22 01:39:59,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868664344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:39:59,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656928642] [2022-11-22 01:39:59,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:59,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:59,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:59,725 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:59,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:39:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:59,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-22 01:39:59,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:59,932 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 01:39:59,939 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 01:39:59,994 WARN L859 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base Int)) (and (= (select |c_old(#valid)| append_~node~0.base) 0) (= |c_#valid| (store |c_old(#valid)| append_~node~0.base 1)) (exists ((v_ArrVal_603 Int)) (= (store |c_old(#length)| append_~node~0.base v_ArrVal_603) |c_#length|)))) is different from true [2022-11-22 01:40:00,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:00,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-22 01:40:00,155 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:40:00,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-22 01:40:00,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:00,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-22 01:40:00,355 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-22 01:40:00,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 01:40:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-22 01:40:00,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:40:07,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656928642] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:40:07,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1495737617] [2022-11-22 01:40:07,100 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-22 01:40:07,100 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:40:07,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:40:07,101 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:40:07,102 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:40:07,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 01:40:07,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-22 01:40:07,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:40:07,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:40:07,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 01:40:07,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 01:40:07,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 01:40:07,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-22 01:40:07,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 01:40:07,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 01:40:07,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-22 01:40:07,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-22 01:40:07,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 01:40:07,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-22 01:40:07,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:40:07,396 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-22 01:40:07,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2022-11-22 01:40:07,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 01:40:07,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:40:07,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 01:40:07,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 01:40:07,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:40:07,495 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-11-22 01:40:07,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-22 01:40:07,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-22 01:40:07,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-22 01:40:07,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2022-11-22 01:40:07,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-11-22 01:40:07,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2022-11-22 01:40:07,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,616 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-22 01:40:07,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-22 01:40:07,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,658 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-22 01:40:07,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 42 [2022-11-22 01:40:07,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-11-22 01:40:07,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,743 INFO L321 Elim1Store]: treesize reduction 62, result has 30.3 percent of original size [2022-11-22 01:40:07,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 64 [2022-11-22 01:40:07,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,794 INFO L321 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2022-11-22 01:40:07,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2022-11-22 01:40:07,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-11-22 01:40:07,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-22 01:40:07,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-22 01:40:07,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:07,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2022-11-22 01:40:08,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:08,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:08,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:08,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:08,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:40:08,028 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-22 01:40:08,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2022-11-22 01:40:08,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:08,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:08,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:08,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-22 01:40:08,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:08,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:08,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:08,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:08,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:08,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2022-11-22 01:40:08,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:08,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:08,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:08,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-22 01:40:08,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:08,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:08,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:08,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:08,244 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-22 01:40:08,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2022-11-22 01:40:08,267 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 102 for LOIs [2022-11-22 01:40:09,849 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:40:23,006 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3592#(and (not (<= (+ append_~head.offset 4) (select |#length| append_~head.base))) (= 0 (select |old(#valid)| append_~node~0.base)) (= |append_#in~head.offset| append_~head.offset) (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.offset| append_~node~0.base) append_~node~0.offset)))) (= |#memory_int| (store |old(#memory_int)| append_~node~0.base (store (select |old(#memory_int)| append_~node~0.base) append_~node~0.offset append_~input))) (not (= append_~node~0.base 0)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (< append_~node~0.base |#StackHeapBarrier|) (= (store |old(#length)| append_~node~0.base 9) |#length|) (= |append_#in~head.offset| 0) (= append_~head.base |append_#in~head.base|) (= |#memory_$Pointer$.base| (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.base| append_~node~0.base) append_~node~0.offset)))) (= |#NULL.offset| 0) (= |#valid| (store |old(#valid)| append_~node~0.base 1)) (= append_~input |append_#in~input|) (<= |append_#in~input| 127) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:40:23,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:40:23,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:40:23,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-11-22 01:40:23,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879136607] [2022-11-22 01:40:23,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:40:23,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 01:40:23,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:40:23,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 01:40:23,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1159, Unknown=1, NotChecked=70, Total=1406 [2022-11-22 01:40:23,009 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 01:40:24,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:40:24,160 INFO L93 Difference]: Finished difference Result 288 states and 321 transitions. [2022-11-22 01:40:24,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 01:40:24,161 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2022-11-22 01:40:24,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:40:24,163 INFO L225 Difference]: With dead ends: 288 [2022-11-22 01:40:24,163 INFO L226 Difference]: Without dead ends: 288 [2022-11-22 01:40:24,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=255, Invalid=1640, Unknown=1, NotChecked=84, Total=1980 [2022-11-22 01:40:24,165 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 265 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:40:24,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 303 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 613 Invalid, 0 Unknown, 178 Unchecked, 0.8s Time] [2022-11-22 01:40:24,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-11-22 01:40:24,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 170. [2022-11-22 01:40:24,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.5748031496062993) internal successors, (200), 160 states have internal predecessors, (200), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-22 01:40:24,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 212 transitions. [2022-11-22 01:40:24,173 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 212 transitions. Word has length 27 [2022-11-22 01:40:24,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:40:24,174 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 212 transitions. [2022-11-22 01:40:24,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 01:40:24,174 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 212 transitions. [2022-11-22 01:40:24,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-22 01:40:24,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:24,176 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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] [2022-11-22 01:40:24,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:40:24,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-22 01:40:24,383 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-22 01:40:24,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:24,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1174362866, now seen corresponding path program 1 times [2022-11-22 01:40:24,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:24,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366022888] [2022-11-22 01:40:24,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:24,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:25,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:25,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:40:25,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366022888] [2022-11-22 01:40:25,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366022888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:40:25,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467729973] [2022-11-22 01:40:25,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:25,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:40:25,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:40:25,536 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:40:25,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:40:25,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:25,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-22 01:40:25,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:40:25,755 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 01:40:25,782 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:40:25,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-22 01:40:25,954 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 13 treesize of output 9 [2022-11-22 01:40:26,013 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:40:26,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-22 01:40:26,022 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 7 treesize of output 3 [2022-11-22 01:40:26,089 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:40:26,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2022-11-22 01:40:26,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:40:26,190 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-22 01:40:26,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-11-22 01:40:26,337 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-11-22 01:40:26,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2022-11-22 01:40:26,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-22 01:40:26,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-22 01:40:26,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-22 01:40:26,567 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 25 treesize of output 13 [2022-11-22 01:40:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:26,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:40:26,650 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_780 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_780) c_append_~head.base) (+ c_append_~head.offset 4))) 1)) is different from false [2022-11-22 01:40:26,889 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:40:26,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2022-11-22 01:40:26,895 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 332 treesize of output 206 [2022-11-22 01:40:26,902 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 182 treesize of output 166 [2022-11-22 01:40:26,910 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 87 treesize of output 79 [2022-11-22 01:40:27,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467729973] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:40:27,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [168007981] [2022-11-22 01:40:27,046 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-22 01:40:27,046 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:40:27,047 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:40:27,047 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:40:27,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:40:27,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 01:40:27,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:40:27,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:40:27,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-22 01:40:27,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 01:40:27,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 01:40:27,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-22 01:40:27,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 01:40:27,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-22 01:40:27,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 01:40:27,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 01:40:27,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 01:40:27,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-22 01:40:27,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-22 01:40:27,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,361 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-22 01:40:27,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2022-11-22 01:40:27,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 01:40:27,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:40:27,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 01:40:27,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:40:27,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 01:40:27,450 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 15 treesize of output 1 [2022-11-22 01:40:27,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:40:27,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:40:27,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 01:40:27,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 01:40:27,489 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 19 treesize of output 1 [2022-11-22 01:40:27,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,523 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-22 01:40:27,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 42 [2022-11-22 01:40:27,533 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 19 treesize of output 1 [2022-11-22 01:40:27,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,555 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-22 01:40:27,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-22 01:40:27,567 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 19 treesize of output 1 [2022-11-22 01:40:27,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,603 INFO L321 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2022-11-22 01:40:27,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2022-11-22 01:40:27,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,673 INFO L321 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2022-11-22 01:40:27,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 74 [2022-11-22 01:40:27,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-22 01:40:27,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-22 01:40:27,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-22 01:40:27,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,920 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-22 01:40:27,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2022-11-22 01:40:27,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:27,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-22 01:40:28,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:28,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:28,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:28,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-22 01:40:28,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:28,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:28,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:28,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:28,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:28,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-22 01:40:28,325 INFO L321 Elim1Store]: treesize reduction 83, result has 54.1 percent of original size [2022-11-22 01:40:28,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 199 treesize of output 286 [2022-11-22 01:40:28,729 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 01:40:28,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:40:28,780 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 01:40:28,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:40:28,788 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:28,815 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:28,841 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:28,848 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:28,969 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:29,157 INFO L321 Elim1Store]: treesize reduction 83, result has 54.1 percent of original size [2022-11-22 01:40:29,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 199 treesize of output 286 [2022-11-22 01:40:29,868 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:40:29,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 50 treesize of output 108 [2022-11-22 01:40:30,050 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:30,057 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:30,064 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:30,071 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:30,077 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:30,084 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:30,090 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:30,097 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:30,103 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:30,109 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:30,117 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:30,139 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:30,157 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:30,163 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:30,169 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:30,176 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:30,203 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:30,307 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:30,532 INFO L321 Elim1Store]: treesize reduction 83, result has 54.1 percent of original size [2022-11-22 01:40:30,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 199 treesize of output 286 [2022-11-22 01:40:32,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:40:32,706 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:32,713 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:32,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:40:32,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-22 01:40:32,753 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:32,760 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:32,768 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:32,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:32,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:40:32,804 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:40:32,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 34 treesize of output 62 [2022-11-22 01:40:32,859 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:32,882 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:32,890 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:32,897 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:32,907 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:32,932 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:32,938 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:32,947 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:32,962 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:32,974 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:32,983 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:32,992 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:33,022 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:33,031 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:33,050 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:33,074 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:33,088 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:33,119 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:33,138 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:33,146 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:33,157 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:33,179 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:33,205 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:33,213 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:33,222 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:33,230 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:33,313 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:33,603 INFO L321 Elim1Store]: treesize reduction 83, result has 54.1 percent of original size [2022-11-22 01:40:33,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 199 treesize of output 286 [2022-11-22 01:40:35,105 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:40:35,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 67 [2022-11-22 01:40:35,171 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 01:40:35,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:40:35,181 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:35,189 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:35,197 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:35,205 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:35,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:35,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:40:35,335 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:40:35,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 25 case distinctions, treesize of input 100 treesize of output 236 [2022-11-22 01:40:40,555 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:40,562 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:40,570 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:40,578 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:40,585 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:40,591 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:40,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:40,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:40:40,620 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:40,629 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:40,664 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:40,912 INFO L321 Elim1Store]: treesize reduction 83, result has 54.1 percent of original size [2022-11-22 01:40:40,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 199 treesize of output 286 [2022-11-22 01:40:41,127 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 01:40:41,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:40:41,134 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 113 for LOIs [2022-11-22 01:40:41,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:40:41,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:40:41,543 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 15 treesize of output 1 [2022-11-22 01:40:41,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 01:40:41,561 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 19 treesize of output 1 [2022-11-22 01:40:41,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 01:40:41,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-22 01:40:41,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-22 01:40:41,605 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 19 treesize of output 1 [2022-11-22 01:40:41,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,630 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:40:41,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2022-11-22 01:40:41,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,648 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:40:41,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2022-11-22 01:40:41,656 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 19 treesize of output 1 [2022-11-22 01:40:41,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-22 01:40:41,687 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 19 treesize of output 1 [2022-11-22 01:40:41,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-22 01:40:41,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,712 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:40:41,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-22 01:40:41,720 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 19 treesize of output 1 [2022-11-22 01:40:41,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,750 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:40:41,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-22 01:40:41,767 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:40:46,037 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4258#(and (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 (+ append_~input 128)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (= (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem8.offset|) (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (<= (+ 8 append_~head.offset) (select |#length| append_~head.base)) (<= append_~head.offset 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 append_~head.offset) (= |append_#in~head.offset| 0) (not (= (select |#valid| |append_#t~mem8.base|) 1)) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4))) (= |#NULL.offset| 0) (= (select |#valid| append_~head.base) 1) (= (select |#valid| append_~node~0.base) 1) (<= append_~input 127) (<= |append_#in~input| 127) (= (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem8.base|) (<= 0 |#StackHeapBarrier|) (<= (+ 9 append_~node~0.offset) (select |#length| append_~node~0.base)) (= |#NULL.base| 0))' at error location [2022-11-22 01:40:46,037 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:40:46,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:40:46,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2022-11-22 01:40:46,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19317691] [2022-11-22 01:40:46,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:40:46,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-22 01:40:46,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:40:46,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-22 01:40:46,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2431, Unknown=2, NotChecked=100, Total=2756 [2022-11-22 01:40:46,043 INFO L87 Difference]: Start difference. First operand 170 states and 212 transitions. Second operand has 26 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 01:40:47,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:40:47,386 INFO L93 Difference]: Finished difference Result 214 states and 267 transitions. [2022-11-22 01:40:47,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 01:40:47,387 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2022-11-22 01:40:47,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:40:47,389 INFO L225 Difference]: With dead ends: 214 [2022-11-22 01:40:47,389 INFO L226 Difference]: Without dead ends: 214 [2022-11-22 01:40:47,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=330, Invalid=3094, Unknown=2, NotChecked=114, Total=3540 [2022-11-22 01:40:47,391 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 270 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:40:47,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 478 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:40:47,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-22 01:40:47,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 174. [2022-11-22 01:40:47,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 132 states have (on average 1.5227272727272727) internal successors, (201), 164 states have internal predecessors, (201), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-22 01:40:47,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 213 transitions. [2022-11-22 01:40:47,400 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 213 transitions. Word has length 33 [2022-11-22 01:40:47,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:40:47,401 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 213 transitions. [2022-11-22 01:40:47,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 01:40:47,401 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 213 transitions. [2022-11-22 01:40:47,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-22 01:40:47,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:47,403 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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] [2022-11-22 01:40:47,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-22 01:40:47,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:40:47,610 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-22 01:40:47,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:47,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1174362867, now seen corresponding path program 1 times [2022-11-22 01:40:47,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:47,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429265441] [2022-11-22 01:40:47,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:47,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:50,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:40:50,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429265441] [2022-11-22 01:40:50,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429265441] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:40:50,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850117331] [2022-11-22 01:40:50,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:50,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:40:50,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:40:50,633 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:40:50,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc0128db-b202-4632-a722-0cbcaf6c1da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:40:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:50,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-22 01:40:50,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:40:50,842 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 01:40:50,869 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:40:50,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-22 01:40:51,169 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 13 treesize of output 9 [2022-11-22 01:40:51,175 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 13 treesize of output 9 [2022-11-22 01:40:51,298 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:40:51,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-22 01:40:51,316 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:40:51,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-22 01:40:51,336 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 7 treesize of output 3 [2022-11-22 01:40:51,347 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 7 treesize of output 3 [2022-11-22 01:40:51,481 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:40:51,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 46 [2022-11-22 01:40:51,518 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:40:51,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 44 [2022-11-22 01:40:51,582 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:51,594 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:40:51,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:40:51,837 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-22 01:40:51,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-11-22 01:40:52,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:52,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-22 01:40:52,185 INFO L321 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2022-11-22 01:40:52,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2022-11-22 01:40:52,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2022-11-22 01:40:52,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-11-22 01:40:52,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2022-11-22 01:40:52,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-11-22 01:40:52,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2022-11-22 01:40:52,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-11-22 01:40:52,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:40:52,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-11-22 01:40:52,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:40:52,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-11-22 01:40:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:52,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:40:52,800 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_append_~head.offset 4))) (and (forall ((v_ArrVal_964 (Array Int Int)) (v_ArrVal_965 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_965) c_append_~head.base) .cse0) 9) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_964) c_append_~head.base) .cse0)))) (forall ((v_ArrVal_965 (Array Int Int))) (<= 0 (+ 5 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_965) c_append_~head.base) .cse0)))))) is different from false [2022-11-22 01:40:55,449 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:40:55,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 103 [2022-11-22 01:40:55,465 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:40:55,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 113 [2022-11-22 01:40:55,512 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:40:55,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 481 treesize of output 345 [2022-11-22 01:40:55,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:40:55,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 982 treesize of output 924 [2022-11-22 01:40:55,601 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:40:55,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1584 treesize of output 1494 [2022-11-22 01:40:55,632 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 1415 treesize of output 1287 [2022-11-22 01:40:55,674 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 1328 treesize of output 1252 [2022-11-22 01:40:55,708 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 1223 treesize of output 1155 [2022-11-22 01:40:55,740 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 1192 treesize of output 1052 [2022-11-22 01:40:55,775 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 1027 treesize of output 1019 [2022-11-22 01:40:57,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850117331] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:40:57,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [88775829] [2022-11-22 01:40:57,568 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-22 01:40:57,568 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:40:57,569 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:40:57,569 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:40:57,569 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:40:57,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 01:40:57,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:40:57,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-22 01:40:57,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:40:57,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-22 01:40:57,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 01:40:57,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 01:40:57,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 01:40:57,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 01:40:57,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 01:40:57,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-22 01:40:57,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-22 01:40:57,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-22 01:40:57,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 01:40:57,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:40:57,887 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-22 01:40:57,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2022-11-22 01:40:57,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:40:57,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 01:40:57,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 01:40:57,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 01:40:57,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:40:57,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:40:57,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:40:57,991 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 15 treesize of output 1 [2022-11-22 01:40:57,998 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 19 treesize of output 1 [2022-11-22 01:40:58,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 01:40:58,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 01:40:58,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,039 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-22 01:40:58,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 42 [2022-11-22 01:40:58,048 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 19 treesize of output 1 [2022-11-22 01:40:58,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,072 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-22 01:40:58,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-22 01:40:58,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,114 INFO L321 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2022-11-22 01:40:58,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2022-11-22 01:40:58,123 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 19 treesize of output 1 [2022-11-22 01:40:58,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,179 INFO L321 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2022-11-22 01:40:58,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 74 [2022-11-22 01:40:58,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-22 01:40:58,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-22 01:40:58,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-22 01:40:58,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:40:58,382 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-22 01:40:58,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2022-11-22 01:40:58,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-22 01:40:58,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-22 01:40:58,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-22 01:40:58,781 INFO L321 Elim1Store]: treesize reduction 83, result has 54.1 percent of original size [2022-11-22 01:40:58,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 199 treesize of output 286 [2022-11-22 01:41:00,715 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:41:00,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 4 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 193 treesize of output 641 [2022-11-22 01:45:24,845 WARN L233 SmtUtils]: Spent 14.92s on a formula simplification. DAG size of input: 4953 DAG size of output: 4939 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-22 01:48:32,008 WARN L233 SmtUtils]: Spent 8.48s on a formula simplification. DAG size of input: 5552 DAG size of output: 5551 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)