./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 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_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW --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 db322df1d89bf1549765f136e3e3b8000484c0c3108c31998992cf725d6dcc20 --- 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-4e7fbc6 [2022-11-23 15:40:57,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:40:57,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:40:57,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:40:57,843 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:40:57,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:40:57,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:40:57,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:40:57,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:40:57,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:40:57,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:40:57,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:40:57,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:40:57,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:40:57,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:40:57,874 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:40:57,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:40:57,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:40:57,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:40:57,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:40:57,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:40:57,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:40:57,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:40:57,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:40:57,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:40:57,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:40:57,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:40:57,910 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:40:57,912 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:40:57,913 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:40:57,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:40:57,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:40:57,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:40:57,919 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:40:57,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:40:57,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:40:57,922 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:40:57,923 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:40:57,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:40:57,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:40:57,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:40:57,926 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 15:40:57,973 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:40:57,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:40:57,975 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:40:57,975 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:40:57,976 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:40:57,976 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:40:57,977 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:40:57,977 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:40:57,977 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:40:57,977 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:40:57,979 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:40:57,979 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:40:57,979 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:40:57,979 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:40:57,980 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:40:57,980 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:40:57,980 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:40:57,980 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:40:57,981 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 15:40:57,981 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 15:40:57,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:40:57,982 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:40:57,982 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 15:40:57,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:40:57,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:40:57,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:40:57,984 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 15:40:57,984 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 15:40:57,985 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 15:40:57,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:40:57,985 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 15:40:57,985 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:40:57,986 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:40:57,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:40:57,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:40:57,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:40:57,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:40:57,987 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:40:57,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:40:57,988 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:40:57,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:40:57,988 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:40:57,988 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_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db322df1d89bf1549765f136e3e3b8000484c0c3108c31998992cf725d6dcc20 [2022-11-23 15:40:58,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:40:58,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:40:58,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:40:58,312 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:40:58,313 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:40:58,314 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i [2022-11-23 15:41:01,480 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:41:01,734 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:41:01,739 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i [2022-11-23 15:41:01,755 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/data/85088519b/5b39926ee01c426f9a40631891a3e3f1/FLAG4d122411b [2022-11-23 15:41:01,773 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/data/85088519b/5b39926ee01c426f9a40631891a3e3f1 [2022-11-23 15:41:01,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:41:01,778 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:41:01,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:41:01,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:41:01,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:41:01,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:41:01" (1/1) ... [2022-11-23 15:41:01,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@101001cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:01, skipping insertion in model container [2022-11-23 15:41:01,786 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:41:01" (1/1) ... [2022-11-23 15:41:01,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:41:01,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:41:02,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:41:02,287 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:41:02,374 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:41:02,412 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:41:02,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:02 WrapperNode [2022-11-23 15:41:02,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:41:02,415 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:41:02,415 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:41:02,415 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:41:02,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:02" (1/1) ... [2022-11-23 15:41:02,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:02" (1/1) ... [2022-11-23 15:41:02,498 INFO L138 Inliner]: procedures = 125, calls = 95, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 302 [2022-11-23 15:41:02,498 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:41:02,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:41:02,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:41:02,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:41:02,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:02" (1/1) ... [2022-11-23 15:41:02,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:02" (1/1) ... [2022-11-23 15:41:02,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:02" (1/1) ... [2022-11-23 15:41:02,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:02" (1/1) ... [2022-11-23 15:41:02,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:02" (1/1) ... [2022-11-23 15:41:02,542 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:02" (1/1) ... [2022-11-23 15:41:02,545 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:02" (1/1) ... [2022-11-23 15:41:02,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:02" (1/1) ... [2022-11-23 15:41:02,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:41:02,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:41:02,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:41:02,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:41:02,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:02" (1/1) ... [2022-11-23 15:41:02,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:41:02,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:41:02,609 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:41:02,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:41:02,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:41:02,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:41:02,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:41:02,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:41:02,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 15:41:02,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 15:41:02,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:41:02,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:41:02,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:41:02,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:41:02,669 INFO L130 BoogieDeclarations]: Found specification of procedure append [2022-11-23 15:41:02,670 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2022-11-23 15:41:02,817 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:41:02,819 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:41:03,647 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:41:03,699 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:41:03,700 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-23 15:41:03,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:41:03 BoogieIcfgContainer [2022-11-23 15:41:03,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:41:03,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:41:03,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:41:03,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:41:03,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:41:01" (1/3) ... [2022-11-23 15:41:03,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@720b68d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:41:03, skipping insertion in model container [2022-11-23 15:41:03,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:02" (2/3) ... [2022-11-23 15:41:03,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@720b68d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:41:03, skipping insertion in model container [2022-11-23 15:41:03,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:41:03" (3/3) ... [2022-11-23 15:41:03,712 INFO L112 eAbstractionObserver]: Analyzing ICFG split_list_test05-2.i [2022-11-23 15:41:03,732 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:41:03,732 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 147 error locations. [2022-11-23 15:41:03,785 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:41:03,792 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;@29417c29, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:41:03,792 INFO L358 AbstractCegarLoop]: Starting to check reachability of 147 error locations. [2022-11-23 15:41:03,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 293 states, 129 states have (on average 2.356589147286822) internal successors, (304), 278 states have internal predecessors, (304), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-23 15:41:03,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 15:41:03,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:41:03,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 15:41:03,805 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-23 15:41:03,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:41:03,810 INFO L85 PathProgramCache]: Analyzing trace with hash 17550, now seen corresponding path program 1 times [2022-11-23 15:41:03,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:41:03,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91682053] [2022-11-23 15:41:03,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:41:03,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:41:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:41:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:41:04,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:41:04,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91682053] [2022-11-23 15:41:04,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91682053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:41:04,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:41:04,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:41:04,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504934569] [2022-11-23 15:41:04,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:41:04,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:41:04,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:41:04,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:41:04,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:41:04,045 INFO L87 Difference]: Start difference. First operand has 293 states, 129 states have (on average 2.356589147286822) internal successors, (304), 278 states have internal predecessors, (304), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) 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) [2022-11-23 15:41:04,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:41:04,540 INFO L93 Difference]: Finished difference Result 499 states and 552 transitions. [2022-11-23 15:41:04,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:41:04,543 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 [2022-11-23 15:41:04,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:41:04,555 INFO L225 Difference]: With dead ends: 499 [2022-11-23 15:41:04,556 INFO L226 Difference]: Without dead ends: 498 [2022-11-23 15:41:04,558 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 [2022-11-23 15:41:04,561 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 224 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:41:04,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 356 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:41:04,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-11-23 15:41:04,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 364. [2022-11-23 15:41:04,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 203 states have (on average 2.3201970443349755) internal successors, (471), 349 states have internal predecessors, (471), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-23 15:41:04,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 501 transitions. [2022-11-23 15:41:04,650 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 501 transitions. Word has length 2 [2022-11-23 15:41:04,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:41:04,651 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 501 transitions. [2022-11-23 15:41:04,651 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) [2022-11-23 15:41:04,652 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 501 transitions. [2022-11-23 15:41:04,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 15:41:04,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:41:04,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 15:41:04,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:41:04,653 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-23 15:41:04,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:41:04,654 INFO L85 PathProgramCache]: Analyzing trace with hash 17551, now seen corresponding path program 1 times [2022-11-23 15:41:04,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:41:04,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147342047] [2022-11-23 15:41:04,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:41:04,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:41:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:41:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:41:04,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:41:04,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147342047] [2022-11-23 15:41:04,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147342047] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:41:04,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:41:04,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:41:04,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99989722] [2022-11-23 15:41:04,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:41:04,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:41:04,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:41:04,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:41:04,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:41:04,780 INFO L87 Difference]: Start difference. First operand 364 states and 501 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) [2022-11-23 15:41:05,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:41:05,086 INFO L93 Difference]: Finished difference Result 365 states and 504 transitions. [2022-11-23 15:41:05,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:41:05,087 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 [2022-11-23 15:41:05,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:41:05,089 INFO L225 Difference]: With dead ends: 365 [2022-11-23 15:41:05,090 INFO L226 Difference]: Without dead ends: 365 [2022-11-23 15:41:05,090 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 [2022-11-23 15:41:05,091 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 5 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:41:05,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 453 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:41:05,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-11-23 15:41:05,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 362. [2022-11-23 15:41:05,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 203 states have (on average 2.310344827586207) internal successors, (469), 347 states have internal predecessors, (469), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-23 15:41:05,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 499 transitions. [2022-11-23 15:41:05,112 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 499 transitions. Word has length 2 [2022-11-23 15:41:05,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:41:05,113 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 499 transitions. [2022-11-23 15:41:05,113 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) [2022-11-23 15:41:05,113 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 499 transitions. [2022-11-23 15:41:05,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 15:41:05,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:41:05,114 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:41:05,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:41:05,115 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-23 15:41:05,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:41:05,115 INFO L85 PathProgramCache]: Analyzing trace with hash -268395331, now seen corresponding path program 1 times [2022-11-23 15:41:05,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:41:05,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896258243] [2022-11-23 15:41:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:41:05,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:41:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:41:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:41:05,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:41:05,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896258243] [2022-11-23 15:41:05,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896258243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:41:05,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:41:05,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:41:05,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126241863] [2022-11-23 15:41:05,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:41:05,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:41:05,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:41:05,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:41:05,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:41:05,257 INFO L87 Difference]: Start difference. First operand 362 states and 499 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-23 15:41:05,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:41:05,532 INFO L93 Difference]: Finished difference Result 357 states and 494 transitions. [2022-11-23 15:41:05,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:41:05,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2022-11-23 15:41:05,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:41:05,537 INFO L225 Difference]: With dead ends: 357 [2022-11-23 15:41:05,538 INFO L226 Difference]: Without dead ends: 357 [2022-11-23 15:41:05,538 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 [2022-11-23 15:41:05,540 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 39 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:41:05,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 404 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:41:05,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-11-23 15:41:05,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 357. [2022-11-23 15:41:05,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 203 states have (on average 2.2857142857142856) internal successors, (464), 342 states have internal predecessors, (464), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-23 15:41:05,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 494 transitions. [2022-11-23 15:41:05,564 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 494 transitions. Word has length 8 [2022-11-23 15:41:05,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:41:05,565 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 494 transitions. [2022-11-23 15:41:05,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-23 15:41:05,565 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 494 transitions. [2022-11-23 15:41:05,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 15:41:05,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:41:05,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:41:05,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:41:05,567 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-23 15:41:05,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:41:05,568 INFO L85 PathProgramCache]: Analyzing trace with hash -268395330, now seen corresponding path program 1 times [2022-11-23 15:41:05,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:41:05,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628677487] [2022-11-23 15:41:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:41:05,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:41:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:41:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:41:05,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:41:05,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628677487] [2022-11-23 15:41:05,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628677487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:41:05,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:41:05,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:41:05,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840417640] [2022-11-23 15:41:05,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:41:05,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:41:05,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:41:05,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:41:05,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:41:05,713 INFO L87 Difference]: Start difference. First operand 357 states and 494 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-23 15:41:05,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:41:05,968 INFO L93 Difference]: Finished difference Result 352 states and 489 transitions. [2022-11-23 15:41:05,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:41:05,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2022-11-23 15:41:05,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:41:05,971 INFO L225 Difference]: With dead ends: 352 [2022-11-23 15:41:05,971 INFO L226 Difference]: Without dead ends: 352 [2022-11-23 15:41:05,971 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 [2022-11-23 15:41:05,972 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 34 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:41:05,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 415 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:41:05,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-11-23 15:41:05,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2022-11-23 15:41:05,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 203 states have (on average 2.2610837438423643) internal successors, (459), 337 states have internal predecessors, (459), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-23 15:41:05,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 489 transitions. [2022-11-23 15:41:05,983 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 489 transitions. Word has length 8 [2022-11-23 15:41:05,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:41:05,984 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 489 transitions. [2022-11-23 15:41:05,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-23 15:41:05,984 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 489 transitions. [2022-11-23 15:41:05,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 15:41:05,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:41:05,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:41:05,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:41:05,986 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-23 15:41:05,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:41:05,986 INFO L85 PathProgramCache]: Analyzing trace with hash 269679752, now seen corresponding path program 1 times [2022-11-23 15:41:05,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:41:05,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830553079] [2022-11-23 15:41:05,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:41:05,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:41:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:41:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:41:06,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:41:06,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830553079] [2022-11-23 15:41:06,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830553079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:41:06,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:41:06,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:41:06,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981461873] [2022-11-23 15:41:06,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:41:06,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:41:06,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:41:06,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:41:06,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:41:06,178 INFO L87 Difference]: Start difference. First operand 352 states and 489 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2022-11-23 15:41:06,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:41:06,857 INFO L93 Difference]: Finished difference Result 475 states and 526 transitions. [2022-11-23 15:41:06,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:41:06,858 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 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 [2022-11-23 15:41:06,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:41:06,860 INFO L225 Difference]: With dead ends: 475 [2022-11-23 15:41:06,860 INFO L226 Difference]: Without dead ends: 475 [2022-11-23 15:41:06,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:41:06,861 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 289 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:41:06,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 633 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:41:06,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-11-23 15:41:06,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 344. [2022-11-23 15:41:06,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 203 states have (on average 2.2216748768472905) internal successors, (451), 329 states have internal predecessors, (451), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-23 15:41:06,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 481 transitions. [2022-11-23 15:41:06,872 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 481 transitions. Word has length 9 [2022-11-23 15:41:06,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:41:06,872 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 481 transitions. [2022-11-23 15:41:06,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2022-11-23 15:41:06,873 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 481 transitions. [2022-11-23 15:41:06,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 15:41:06,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:41:06,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:41:06,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:41:06,874 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-23 15:41:06,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:41:06,874 INFO L85 PathProgramCache]: Analyzing trace with hash 269679753, now seen corresponding path program 1 times [2022-11-23 15:41:06,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:41:06,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52596891] [2022-11-23 15:41:06,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:41:06,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:41:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:41:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:41:07,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:41:07,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52596891] [2022-11-23 15:41:07,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52596891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:41:07,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:41:07,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:41:07,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699936291] [2022-11-23 15:41:07,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:41:07,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:41:07,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:41:07,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:41:07,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:41:07,184 INFO L87 Difference]: Start difference. First operand 344 states and 481 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2022-11-23 15:41:08,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:41:08,132 INFO L93 Difference]: Finished difference Result 465 states and 516 transitions. [2022-11-23 15:41:08,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:41:08,134 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 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 [2022-11-23 15:41:08,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:41:08,136 INFO L225 Difference]: With dead ends: 465 [2022-11-23 15:41:08,136 INFO L226 Difference]: Without dead ends: 465 [2022-11-23 15:41:08,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:41:08,137 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 736 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:41:08,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 308 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 15:41:08,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-11-23 15:41:08,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 335. [2022-11-23 15:41:08,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 203 states have (on average 2.1724137931034484) internal successors, (441), 320 states have internal predecessors, (441), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-23 15:41:08,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 471 transitions. [2022-11-23 15:41:08,150 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 471 transitions. Word has length 9 [2022-11-23 15:41:08,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:41:08,150 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 471 transitions. [2022-11-23 15:41:08,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2022-11-23 15:41:08,151 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 471 transitions. [2022-11-23 15:41:08,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 15:41:08,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:41:08,152 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:41:08,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:41:08,152 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-23 15:41:08,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:41:08,153 INFO L85 PathProgramCache]: Analyzing trace with hash 2120301909, now seen corresponding path program 1 times [2022-11-23 15:41:08,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:41:08,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204328840] [2022-11-23 15:41:08,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:41:08,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:41:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:41:08,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:41:08,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:41:08,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204328840] [2022-11-23 15:41:08,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204328840] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:41:08,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:41:08,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 15:41:08,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663788247] [2022-11-23 15:41:08,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:41:08,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:41:08,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:41:08,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:41:08,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:41:08,614 INFO L87 Difference]: Start difference. First operand 335 states and 471 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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) [2022-11-23 15:41:09,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:41:09,076 INFO L93 Difference]: Finished difference Result 352 states and 491 transitions. [2022-11-23 15:41:09,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:41:09,077 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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 16 [2022-11-23 15:41:09,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:41:09,079 INFO L225 Difference]: With dead ends: 352 [2022-11-23 15:41:09,079 INFO L226 Difference]: Without dead ends: 352 [2022-11-23 15:41:09,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:41:09,080 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 20 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:41:09,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1017 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:41:09,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-11-23 15:41:09,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 342. [2022-11-23 15:41:09,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 209 states have (on average 2.1435406698564594) internal successors, (448), 326 states have internal predecessors, (448), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-23 15:41:09,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 480 transitions. [2022-11-23 15:41:09,090 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 480 transitions. Word has length 16 [2022-11-23 15:41:09,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:41:09,090 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 480 transitions. [2022-11-23 15:41:09,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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) [2022-11-23 15:41:09,090 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 480 transitions. [2022-11-23 15:41:09,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 15:41:09,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:41:09,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:41:09,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:41:09,091 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-23 15:41:09,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:41:09,092 INFO L85 PathProgramCache]: Analyzing trace with hash 749666084, now seen corresponding path program 1 times [2022-11-23 15:41:09,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:41:09,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912303641] [2022-11-23 15:41:09,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:41:09,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:41:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:41:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:41:09,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:41:09,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912303641] [2022-11-23 15:41:09,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912303641] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:41:09,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:41:09,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 15:41:09,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544820228] [2022-11-23 15:41:09,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:41:09,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 15:41:09,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:41:09,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 15:41:09,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:41:09,592 INFO L87 Difference]: Start difference. First operand 342 states and 480 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) 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) [2022-11-23 15:41:10,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:41:10,489 INFO L93 Difference]: Finished difference Result 476 states and 529 transitions. [2022-11-23 15:41:10,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 15:41:10,489 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) 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 [2022-11-23 15:41:10,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:41:10,492 INFO L225 Difference]: With dead ends: 476 [2022-11-23 15:41:10,492 INFO L226 Difference]: Without dead ends: 476 [2022-11-23 15:41:10,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:41:10,493 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 691 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:41:10,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 1005 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 15:41:10,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-11-23 15:41:10,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 344. [2022-11-23 15:41:10,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 211 states have (on average 2.132701421800948) internal successors, (450), 328 states have internal predecessors, (450), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-23 15:41:10,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 482 transitions. [2022-11-23 15:41:10,508 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 482 transitions. Word has length 17 [2022-11-23 15:41:10,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:41:10,508 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 482 transitions. [2022-11-23 15:41:10,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) 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) [2022-11-23 15:41:10,511 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 482 transitions. [2022-11-23 15:41:10,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-23 15:41:10,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:41:10,513 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:41:10,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:41:10,513 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-23 15:41:10,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:41:10,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1443652774, now seen corresponding path program 1 times [2022-11-23 15:41:10,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:41:10,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287535191] [2022-11-23 15:41:10,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:41:10,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:41:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:41:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:41:14,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:41:14,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287535191] [2022-11-23 15:41:14,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287535191] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:41:14,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715418377] [2022-11-23 15:41:14,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:41:14,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:41:14,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:41:14,154 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:41:14,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:41:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:41:14,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-23 15:41:14,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:41:14,401 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 [2022-11-23 15:41:14,751 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 [2022-11-23 15:41:14,761 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 [2022-11-23 15:41:14,862 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:41:14,863 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 [2022-11-23 15:41:14,880 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 [2022-11-23 15:41:14,905 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:41:14,906 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 [2022-11-23 15:41:14,917 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 [2022-11-23 15:41:15,063 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:41:15,063 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 [2022-11-23 15:41:15,083 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:41:15,084 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 [2022-11-23 15:41:15,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:41:15,291 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-23 15:41:15,291 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 [2022-11-23 15:41:15,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:41:15,537 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 [2022-11-23 15:41:15,555 INFO L321 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2022-11-23 15:41:15,556 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 [2022-11-23 15:41:15,676 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 [2022-11-23 15:41:15,684 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 [2022-11-23 15:41:15,913 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 [2022-11-23 15:41:15,921 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 [2022-11-23 15:41:15,959 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 [2022-11-23 15:41:15,968 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 [2022-11-23 15:41:16,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:41:16,090 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 39 treesize of output 21 [2022-11-23 15:41:16,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:41:16,099 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 32 treesize of output 14 [2022-11-23 15:41:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:41:16,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:41:16,337 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_append_~head.offset 4))) (and (forall ((v_ArrVal_297 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_297) c_append_~head.base) .cse0) 5))) (forall ((v_ArrVal_298 (Array Int Int)) (v_ArrVal_297 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_297) c_append_~head.base) .cse0) 9) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_298) c_append_~head.base) .cse0)))))) is different from false [2022-11-23 15:41:21,226 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:41:21,227 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 116 treesize of output 117 [2022-11-23 15:41:21,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:41:21,244 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 136 treesize of output 127 [2022-11-23 15:41:21,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:41:21,264 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 289 treesize of output 219 [2022-11-23 15:41:21,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:41:21,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 556 treesize of output 538 [2022-11-23 15:41:21,357 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:41:21,357 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 846 treesize of output 836 [2022-11-23 15:41:21,387 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 798 treesize of output 722 [2022-11-23 15:41:21,417 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 693 treesize of output 629 [2022-11-23 15:41:21,475 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:41:21,475 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 629 treesize of output 602 [2022-11-23 15:41:21,505 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 630 treesize of output 586 [2022-11-23 15:41:21,534 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 561 treesize of output 553 [2022-11-23 15:42:28,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715418377] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:42:28,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [283365257] [2022-11-23 15:42:28,564 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-23 15:42:28,564 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:42:28,569 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:42:28,574 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:42:28,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:42:28,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:28,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:28,619 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 [2022-11-23 15:42:28,639 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 [2022-11-23 15:42:28,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:28,648 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 [2022-11-23 15:42:28,656 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 [2022-11-23 15:42:28,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:28,672 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 [2022-11-23 15:42:28,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:28,681 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 [2022-11-23 15:42:28,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:28,691 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 [2022-11-23 15:42:28,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:28,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:28,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:42:28,751 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 [2022-11-23 15:42:28,756 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 [2022-11-23 15:42:28,764 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 [2022-11-23 15:42:28,769 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 [2022-11-23 15:42:28,775 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 [2022-11-23 15:42:28,816 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 [2022-11-23 15:42:28,821 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 [2022-11-23 15:42:28,825 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 [2022-11-23 15:42:28,832 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 [2022-11-23 15:42:28,837 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 [2022-11-23 15:42:28,842 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 [2022-11-23 15:42:28,849 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 [2022-11-23 15:42:28,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:28,873 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 15:42:28,873 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 [2022-11-23 15:42:28,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:28,896 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-23 15:42:28,896 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 [2022-11-23 15:42:28,910 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 [2022-11-23 15:42:28,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:28,942 INFO L321 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2022-11-23 15:42:28,943 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 [2022-11-23 15:42:28,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:28,999 INFO L321 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2022-11-23 15:42:29,000 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 [2022-11-23 15:42:29,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-23 15:42:29,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-23 15:42:29,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-23 15:42:29,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:42:29,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2022-11-23 15:42:29,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-23 15:42:29,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-23 15:42:29,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-23 15:42:29,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:42:29,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2022-11-23 15:42:29,339 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 91 for LOIs [2022-11-23 15:42:29,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,668 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 [2022-11-23 15:42:29,675 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 [2022-11-23 15:42:29,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,685 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 [2022-11-23 15:42:29,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,703 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:42:29,703 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 [2022-11-23 15:42:29,710 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 [2022-11-23 15:42:29,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,723 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:42:29,724 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 [2022-11-23 15:42:29,747 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 [2022-11-23 15:42:29,753 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 [2022-11-23 15:42:29,759 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 [2022-11-23 15:42:29,769 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 [2022-11-23 15:42:29,776 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 [2022-11-23 15:42:29,783 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 [2022-11-23 15:42:29,798 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 [2022-11-23 15:42:29,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,807 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 [2022-11-23 15:42:29,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,818 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 [2022-11-23 15:42:29,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,842 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:42:29,842 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 [2022-11-23 15:42:29,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:29,861 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:42:29,862 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 [2022-11-23 15:42:29,872 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 [2022-11-23 15:42:29,878 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:42:35,440 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6664#(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$.base| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$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$.offset| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (= (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem60.offset|) (<= 0 append_~head.offset) (= |append_#in~head.offset| 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4))) (or (not (<= (+ |append_#t~mem60.offset| 9) (select |#length| |append_#t~mem60.base|))) (not (<= 0 (+ |append_#t~mem60.offset| 5)))) (= |#NULL.offset| 0) (= (select |#valid| append_~head.base) 1) (= (select |#valid| append_~node~0.base) 1) (<= append_~input 127) (<= |append_#in~input| 127) (= |append_#t~mem60.base| (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (<= 0 |#StackHeapBarrier|) (<= (+ 9 append_~node~0.offset) (select |#length| append_~node~0.base)) (= |#NULL.base| 0))' at error location [2022-11-23 15:42:35,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:42:35,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:42:35,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 34 [2022-11-23 15:42:35,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747229167] [2022-11-23 15:42:35,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:42:35,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-23 15:42:35,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:42:35,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-23 15:42:35,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=3773, Unknown=2, NotChecked=124, Total=4160 [2022-11-23 15:42:35,444 INFO L87 Difference]: Start difference. First operand 344 states and 482 transitions. Second operand has 36 states, 35 states have (on average 1.6) internal successors, (56), 31 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:42:50,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:42:50,846 INFO L93 Difference]: Finished difference Result 993 states and 1167 transitions. [2022-11-23 15:42:50,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-23 15:42:50,847 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.6) internal successors, (56), 31 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2022-11-23 15:42:50,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:42:50,852 INFO L225 Difference]: With dead ends: 993 [2022-11-23 15:42:50,852 INFO L226 Difference]: Without dead ends: 993 [2022-11-23 15:42:50,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2309 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=765, Invalid=8167, Unknown=2, NotChecked=186, Total=9120 [2022-11-23 15:42:50,856 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 1806 mSDsluCounter, 2363 mSDsCounter, 0 mSdLazyCounter, 8061 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1806 SdHoareTripleChecker+Valid, 2467 SdHoareTripleChecker+Invalid, 8405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 8061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:42:50,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1806 Valid, 2467 Invalid, 8405 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [344 Valid, 8061 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2022-11-23 15:42:50,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-11-23 15:42:50,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 390. [2022-11-23 15:42:50,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 240 states have (on average 2.033333333333333) internal successors, (488), 360 states have internal predecessors, (488), 31 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (61), 30 states have call predecessors, (61), 31 states have call successors, (61) [2022-11-23 15:42:50,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 580 transitions. [2022-11-23 15:42:50,881 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 580 transitions. Word has length 31 [2022-11-23 15:42:50,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:42:50,881 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 580 transitions. [2022-11-23 15:42:50,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.6) internal successors, (56), 31 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:42:50,881 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 580 transitions. [2022-11-23 15:42:50,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-23 15:42:50,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:42:50,882 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:42:50,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 15:42:51,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:42:51,089 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-23 15:42:51,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:42:51,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1443652773, now seen corresponding path program 1 times [2022-11-23 15:42:51,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:42:51,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815147212] [2022-11-23 15:42:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:42:51,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:42:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:42:52,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:42:52,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:42:52,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815147212] [2022-11-23 15:42:52,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815147212] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:42:52,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106402247] [2022-11-23 15:42:52,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:42:52,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:42:52,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:42:52,042 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:42:52,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:42:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:42:52,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-23 15:42:52,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:42:52,203 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 [2022-11-23 15:42:52,394 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 [2022-11-23 15:42:52,467 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:42:52,467 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 [2022-11-23 15:42:52,472 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 [2022-11-23 15:42:52,568 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:42:52,568 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 31 treesize of output 37 [2022-11-23 15:42:52,591 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 15:42:52,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:42:52,722 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-23 15:42:52,723 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 [2022-11-23 15:42:52,889 INFO L321 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2022-11-23 15:42:52,890 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 28 treesize of output 45 [2022-11-23 15:42:52,982 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 38 treesize of output 36 [2022-11-23 15:42:53,106 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 38 treesize of output 36 [2022-11-23 15:42:53,131 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 38 treesize of output 36 [2022-11-23 15:42:53,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:42:53,205 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 41 treesize of output 17 [2022-11-23 15:42:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:42:53,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:42:53,285 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_455 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_455) c_append_~head.base) (+ c_append_~head.offset 4))) 1)) is different from false [2022-11-23 15:42:53,525 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:42:53,525 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 [2022-11-23 15:42:53,538 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:42:53,539 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 332 treesize of output 214 [2022-11-23 15:42:53,548 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 174 [2022-11-23 15:42:53,556 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 174 treesize of output 158 [2022-11-23 15:42:53,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106402247] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:42:53,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1082204046] [2022-11-23 15:42:53,854 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-23 15:42:53,854 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:42:53,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:42:53,855 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:42:53,855 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:42:53,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:53,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:53,874 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 [2022-11-23 15:42:53,887 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 [2022-11-23 15:42:53,894 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 [2022-11-23 15:42:53,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:53,905 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 [2022-11-23 15:42:53,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:53,920 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 [2022-11-23 15:42:53,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:53,928 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 [2022-11-23 15:42:53,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:53,937 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 [2022-11-23 15:42:53,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:53,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:53,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:42:53,998 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 [2022-11-23 15:42:54,002 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 [2022-11-23 15:42:54,009 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 [2022-11-23 15:42:54,014 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 [2022-11-23 15:42:54,020 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 [2022-11-23 15:42:54,050 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 [2022-11-23 15:42:54,054 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 [2022-11-23 15:42:54,058 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 [2022-11-23 15:42:54,064 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 [2022-11-23 15:42:54,070 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 [2022-11-23 15:42:54,077 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 [2022-11-23 15:42:54,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:54,095 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-23 15:42:54,095 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 [2022-11-23 15:42:54,102 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 [2022-11-23 15:42:54,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:54,125 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 15:42:54,125 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 [2022-11-23 15:42:54,136 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 [2022-11-23 15:42:54,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:54,180 INFO L321 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2022-11-23 15:42:54,181 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 [2022-11-23 15:42:54,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:54,224 INFO L321 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2022-11-23 15:42:54,225 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 [2022-11-23 15:42:54,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:54,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:54,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-23 15:42:54,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:54,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-23 15:42:54,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:54,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-23 15:42:54,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:54,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:54,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:42:54,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:54,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-23 15:42:54,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:54,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:54,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-23 15:42:54,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:54,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-23 15:42:54,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:54,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:54,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:42:54,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2022-11-23 15:42:54,558 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 94 for LOIs [2022-11-23 15:42:54,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:54,900 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 [2022-11-23 15:42:54,906 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 [2022-11-23 15:42:54,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:54,915 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 [2022-11-23 15:42:54,927 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 [2022-11-23 15:42:54,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:54,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:54,943 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:42:54,943 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 [2022-11-23 15:42:54,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:54,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:54,956 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:42:54,957 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 [2022-11-23 15:42:54,977 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 [2022-11-23 15:42:54,982 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 [2022-11-23 15:42:54,988 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 [2022-11-23 15:42:54,999 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 [2022-11-23 15:42:55,005 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 [2022-11-23 15:42:55,011 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 [2022-11-23 15:42:55,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:55,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:55,028 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 [2022-11-23 15:42:55,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:42:55,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:55,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:55,046 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 [2022-11-23 15:42:55,060 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 [2022-11-23 15:42:55,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:55,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:55,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:55,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:55,073 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:42:55,074 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 [2022-11-23 15:42:55,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:55,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:55,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:55,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:42:55,091 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:42:55,092 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 [2022-11-23 15:42:55,101 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:42:59,339 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8294#(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$.base| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$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$.offset| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (= (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem60.offset|) (<= 0 append_~head.offset) (= |append_#in~head.offset| 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4))) (= |#NULL.offset| 0) (= (select |#valid| append_~head.base) 1) (= (select |#valid| append_~node~0.base) 1) (not (= (select |#valid| |append_#t~mem60.base|) 1)) (<= append_~input 127) (<= |append_#in~input| 127) (= |append_#t~mem60.base| (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (<= 0 |#StackHeapBarrier|) (<= (+ 9 append_~node~0.offset) (select |#length| append_~node~0.base)) (= |#NULL.base| 0))' at error location [2022-11-23 15:42:59,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:42:59,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:42:59,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2022-11-23 15:42:59,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051478362] [2022-11-23 15:42:59,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:42:59,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 15:42:59,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:42:59,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 15:42:59,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2429, Unknown=1, NotChecked=100, Total=2756 [2022-11-23 15:42:59,341 INFO L87 Difference]: Start difference. First operand 390 states and 580 transitions. Second operand has 26 states, 25 states have (on average 2.24) internal successors, (56), 22 states have internal predecessors, (56), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:43:02,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:43:02,119 INFO L93 Difference]: Finished difference Result 525 states and 628 transitions. [2022-11-23 15:43:02,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 15:43:02,120 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 22 states have internal predecessors, (56), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2022-11-23 15:43:02,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:43:02,123 INFO L225 Difference]: With dead ends: 525 [2022-11-23 15:43:02,123 INFO L226 Difference]: Without dead ends: 525 [2022-11-23 15:43:02,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=358, Invalid=3305, Unknown=1, NotChecked=118, Total=3782 [2022-11-23 15:43:02,125 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 1262 mSDsluCounter, 1531 mSDsCounter, 0 mSdLazyCounter, 2177 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1262 SdHoareTripleChecker+Valid, 1681 SdHoareTripleChecker+Invalid, 2317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 2177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:43:02,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1262 Valid, 1681 Invalid, 2317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 2177 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-23 15:43:02,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-11-23 15:43:02,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 395. [2022-11-23 15:43:02,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 245 states have (on average 2.0040816326530613) internal successors, (491), 365 states have internal predecessors, (491), 31 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (61), 30 states have call predecessors, (61), 31 states have call successors, (61) [2022-11-23 15:43:02,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 583 transitions. [2022-11-23 15:43:02,145 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 583 transitions. Word has length 31 [2022-11-23 15:43:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:43:02,146 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 583 transitions. [2022-11-23 15:43:02,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 22 states have internal predecessors, (56), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:43:02,146 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 583 transitions. [2022-11-23 15:43:02,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 15:43:02,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:43:02,148 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 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] [2022-11-23 15:43:02,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:43:02,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 15:43:02,359 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-23 15:43:02,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:43:02,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1786728893, now seen corresponding path program 1 times [2022-11-23 15:43:02,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:43:02,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055045685] [2022-11-23 15:43:02,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:43:02,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:43:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:43:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:43:03,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:43:03,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055045685] [2022-11-23 15:43:03,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055045685] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:43:03,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340285854] [2022-11-23 15:43:03,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:43:03,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:43:03,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:43:03,651 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:43:03,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95115a43-8728-4439-b8ff-124a8e4ce2bc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:43:03,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:43:03,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-23 15:43:03,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:43:03,892 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 [2022-11-23 15:43:04,092 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 [2022-11-23 15:43:04,097 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 [2022-11-23 15:43:04,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:43:04,290 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 26 treesize of output 28 [2022-11-23 15:43:04,309 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-23 15:43:04,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-11-23 15:43:04,381 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 36 treesize of output 36 [2022-11-23 15:43:04,419 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 [2022-11-23 15:43:04,522 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 36 treesize of output 36 [2022-11-23 15:43:04,527 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 [2022-11-23 15:43:04,555 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 36 treesize of output 36 [2022-11-23 15:43:04,561 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 [2022-11-23 15:43:04,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:43:04,618 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 29 treesize of output 17 [2022-11-23 15:43:04,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:43:04,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:43:04,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 17 [2022-11-23 15:43:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:43:04,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:43:05,203 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:43:05,203 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 93 treesize of output 94 [2022-11-23 15:43:05,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:43:05,215 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 95 treesize of output 86 [2022-11-23 15:43:05,230 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-23 15:43:05,230 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 140 treesize of output 113 [2022-11-23 15:43:05,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:43:05,238 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 142 [2022-11-23 15:43:05,264 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:43:05,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 207 treesize of output 221 [2022-11-23 15:43:05,279 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 185 treesize of output 169 [2022-11-23 15:43:05,287 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 194 treesize of output 170 [2022-11-23 15:43:05,308 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:43:05,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 187 [2022-11-23 15:43:05,321 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 149 treesize of output 145 [2022-11-23 15:43:09,525 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:43:09,525 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 24 treesize of output 25 [2022-11-23 15:43:09,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:43:09,535 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 40 treesize of output 39 [2022-11-23 15:43:09,546 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 13 treesize of output 9 [2022-11-23 15:43:09,615 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:43:09,616 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 48 treesize of output 49 [2022-11-23 15:43:09,632 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:43:09,632 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 38 treesize of output 39 [2022-11-23 15:43:09,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:43:09,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:43:09,647 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 36 treesize of output 35 [2022-11-23 15:43:09,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:43:09,663 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:43:09,664 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 27 treesize of output 26 [2022-11-23 15:43:09,949 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 109 treesize of output 105 [2022-11-23 15:43:10,467 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:43:10,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340285854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:43:10,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [291790220] [2022-11-23 15:43:10,470 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-11-23 15:43:10,470 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:43:10,471 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:43:10,471 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:43:10,471 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:43:10,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:43:10,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:43:10,491 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 [2022-11-23 15:43:10,503 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 [2022-11-23 15:43:10,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:43:10,511 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 [2022-11-23 15:43:10,518 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 [2022-11-23 15:43:10,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:43:10,534 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 [2022-11-23 15:43:10,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:43:10,542 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 [2022-11-23 15:43:10,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:43:10,550 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 [2022-11-23 15:43:10,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:43:10,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:43:10,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:43:10,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2022-11-23 15:43:10,609 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 [2022-11-23 15:43:10,614 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 [2022-11-23 15:43:10,620 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 [2022-11-23 15:43:10,625 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 [2022-11-23 15:43:10,630 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 [2022-11-23 15:43:10,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:43:10,667 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 [2022-11-23 15:43:10,673 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 [2022-11-23 15:43:10,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:43:10,680 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 [2022-11-23 15:43:10,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:43:10,706 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 15:43:10,706 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 2 case distinctions, treesize of input 29 treesize of output 41 [2022-11-23 15:43:10,720 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 [2022-11-23 15:43:10,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:43:10,749 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 15:43:10,749 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 2 case distinctions, treesize of input 29 treesize of output 41 [2022-11-23 15:43:10,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:43:10,858 INFO L321 Elim1Store]: treesize reduction 92, result has 43.9 percent of original size [2022-11-23 15:43:10,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 176 treesize of output 174 [2022-11-23 15:43:10,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:43:10,929 INFO L321 Elim1Store]: treesize reduction 84, result has 36.4 percent of original size [2022-11-23 15:43:10,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 172 treesize of output 152 [2022-11-23 15:43:10,943 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 [2022-11-23 15:43:11,028 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 [2022-11-23 15:43:11,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:43:11,265 INFO L321 Elim1Store]: treesize reduction 342, result has 27.5 percent of original size [2022-11-23 15:43:11,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 516 treesize of output 517 [2022-11-23 15:43:11,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:43:11,492 INFO L321 Elim1Store]: treesize reduction 248, result has 33.0 percent of original size [2022-11-23 15:43:11,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 456 treesize of output 421 [2022-11-23 15:44:16,052 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 [2022-11-23 15:44:16,056 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 [2022-11-23 15:44:16,060 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 [2022-11-23 15:44:16,066 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 [2022-11-23 15:44:16,072 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 [2022-11-23 15:44:16,077 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 [2022-11-23 15:44:16,083 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 [2022-11-23 15:44:16,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:44:16,114 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 15:44:16,114 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 [2022-11-23 15:44:16,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:44:16,137 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-23 15:44:16,137 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 [2022-11-23 15:44:16,147 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 [2022-11-23 15:44:16,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:44:16,179 INFO L321 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2022-11-23 15:44:16,180 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 39 treesize of output 44 [2022-11-23 15:44:16,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:44:16,232 INFO L321 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2022-11-23 15:44:16,233 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 [2022-11-23 15:44:20,122 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8010 conjuctions. This might take some time... [2022-11-23 15:44:24,651 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 8010 conjuctions. [2022-11-23 15:44:24,688 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:44:24,689 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-23 15:44:24,715 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:44:24,715 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-23 15:44:24,840 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 5457 conjuctions. This might take some time... [2022-11-23 15:44:27,061 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 5457 conjuctions. [2022-11-23 15:44:27,100 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-23 15:44:27,103 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2022-11-23 15:44:27,114 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:44:27,131 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2022-11-23 15:44:27,453 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-23 15:44:28,362 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:44:28,363 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:44:28,364 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:44:29,211 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:44:29,212 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:44:29,213 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-23 15:44:29,825 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 9858 conjuctions. This might take some time... [2022-11-23 15:44:36,923 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 9858 conjuctions. [2022-11-23 15:44:36,970 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:44:36,971 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:44:41,354 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 13157 conjuctions. This might take some time... [2022-11-23 15:44:55,010 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 13157 conjuctions. [2022-11-23 15:44:55,196 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:44:55,197 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:44:55,216 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:44:55,234 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:44:55,234 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:44:55,235 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:44:55,235 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:44:56,211 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8792 conjuctions. This might take some time... [2022-11-23 15:45:01,486 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 8792 conjuctions. [2022-11-23 15:45:01,532 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:45:03,788 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 25980 conjuctions. This might take some time... [2022-11-23 15:45:58,082 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 25980 conjuctions. [2022-11-23 15:45:58,394 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 23529 conjuctions. This might take some time... [2022-11-23 15:46:53,056 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 23529 conjuctions. [2022-11-23 15:46:53,251 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 14328 conjuctions. This might take some time... [2022-11-23 15:47:11,833 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 14328 conjuctions. [2022-11-23 15:47:11,890 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:47:11,897 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-23 15:47:11,898 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:47:11,919 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:47:12,888 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 55641 conjuctions. This might take some time...