./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_update_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a 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_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_update_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI --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 1fd0aba5d9be2820550e57012fb4e12f76fe291bb253443319d08539e5b2ba1a --- 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-5e519f3 [2022-11-03 03:31:13,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:31:13,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:31:13,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:31:13,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:31:13,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:31:13,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:31:13,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:31:13,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:31:13,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:31:13,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:31:13,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:31:13,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:31:13,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:31:13,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:31:13,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:31:13,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:31:13,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:31:13,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:31:13,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:31:13,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:31:13,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:31:13,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:31:13,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:31:13,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:31:13,937 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:31:13,947 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:31:13,948 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:31:13,949 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:31:13,950 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:31:13,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:31:13,953 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:31:13,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:31:13,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:31:13,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:31:13,957 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:31:13,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:31:13,958 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:31:13,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:31:13,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:31:13,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:31:13,963 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-03 03:31:14,003 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:31:14,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:31:14,004 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:31:14,004 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:31:14,005 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:31:14,005 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:31:14,005 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:31:14,005 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:31:14,005 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:31:14,006 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:31:14,006 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:31:14,010 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:31:14,010 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:31:14,010 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:31:14,011 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:31:14,011 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:31:14,011 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:31:14,011 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:31:14,012 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 03:31:14,012 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 03:31:14,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:31:14,012 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:31:14,013 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 03:31:14,013 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:31:14,013 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:31:14,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:31:14,014 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 03:31:14,014 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 03:31:14,015 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 03:31:14,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:31:14,015 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:31:14,015 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:31:14,015 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:31:14,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:31:14,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:31:14,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:31:14,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:31:14,017 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:31:14,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:31:14,019 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:31:14,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:31:14,020 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:31:14,020 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_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fd0aba5d9be2820550e57012fb4e12f76fe291bb253443319d08539e5b2ba1a [2022-11-03 03:31:14,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:31:14,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:31:14,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:31:14,353 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:31:14,354 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:31:14,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/list-simple/sll2n_update_all.i [2022-11-03 03:31:14,429 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/data/4f98c7b6d/8b6be4b5d4cc46d996435bc2549832b6/FLAGe19b34555 [2022-11-03 03:31:15,030 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:31:15,031 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/sv-benchmarks/c/list-simple/sll2n_update_all.i [2022-11-03 03:31:15,043 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/data/4f98c7b6d/8b6be4b5d4cc46d996435bc2549832b6/FLAGe19b34555 [2022-11-03 03:31:15,291 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/data/4f98c7b6d/8b6be4b5d4cc46d996435bc2549832b6 [2022-11-03 03:31:15,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:31:15,297 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:31:15,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:31:15,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:31:15,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:31:15,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:31:15" (1/1) ... [2022-11-03 03:31:15,307 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ed194fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:15, skipping insertion in model container [2022-11-03 03:31:15,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:31:15" (1/1) ... [2022-11-03 03:31:15,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:31:15,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:31:15,691 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/sv-benchmarks/c/list-simple/sll2n_update_all.i[24218,24231] [2022-11-03 03:31:15,694 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:31:15,702 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:31:15,768 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/sv-benchmarks/c/list-simple/sll2n_update_all.i[24218,24231] [2022-11-03 03:31:15,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:31:15,816 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:31:15,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:15 WrapperNode [2022-11-03 03:31:15,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:31:15,820 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:31:15,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:31:15,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:31:15,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:15" (1/1) ... [2022-11-03 03:31:15,865 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:15" (1/1) ... [2022-11-03 03:31:15,887 INFO L138 Inliner]: procedures = 126, calls = 22, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 121 [2022-11-03 03:31:15,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:31:15,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:31:15,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:31:15,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:31:15,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:15" (1/1) ... [2022-11-03 03:31:15,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:15" (1/1) ... [2022-11-03 03:31:15,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:15" (1/1) ... [2022-11-03 03:31:15,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:15" (1/1) ... [2022-11-03 03:31:15,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:15" (1/1) ... [2022-11-03 03:31:15,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:15" (1/1) ... [2022-11-03 03:31:15,915 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:15" (1/1) ... [2022-11-03 03:31:15,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:15" (1/1) ... [2022-11-03 03:31:15,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:31:15,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:31:15,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:31:15,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:31:15,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:15" (1/1) ... [2022-11-03 03:31:15,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:31:15,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:15,967 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:31:15,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:31:16,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:31:16,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:31:16,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:31:16,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:31:16,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 03:31:16,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 03:31:16,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:31:16,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:31:16,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:31:16,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:31:16,161 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:31:16,164 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:31:16,560 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:31:16,701 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:31:16,701 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-03 03:31:16,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:31:16 BoogieIcfgContainer [2022-11-03 03:31:16,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:31:16,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:31:16,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:31:16,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:31:16,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:31:15" (1/3) ... [2022-11-03 03:31:16,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e820afd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:31:16, skipping insertion in model container [2022-11-03 03:31:16,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:15" (2/3) ... [2022-11-03 03:31:16,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e820afd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:31:16, skipping insertion in model container [2022-11-03 03:31:16,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:31:16" (3/3) ... [2022-11-03 03:31:16,713 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_update_all.i [2022-11-03 03:31:16,733 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:31:16,733 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2022-11-03 03:31:16,780 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:31:16,787 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;@3e58d2e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:31:16,787 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2022-11-03 03:31:16,792 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 23 states have (on average 2.260869565217391) internal successors, (52), 44 states have internal predecessors, (52), 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) [2022-11-03 03:31:16,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:31:16,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:16,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:31:16,801 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:31:16,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:16,807 INFO L85 PathProgramCache]: Analyzing trace with hash 5402296, now seen corresponding path program 1 times [2022-11-03 03:31:16,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:16,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712203208] [2022-11-03 03:31:16,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:16,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:17,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:17,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712203208] [2022-11-03 03:31:17,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712203208] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:17,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:31:17,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:31:17,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990635350] [2022-11-03 03:31:17,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:17,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:31:17,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:17,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:31:17,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:31:17,112 INFO L87 Difference]: Start difference. First operand has 45 states, 23 states have (on average 2.260869565217391) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:17,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:17,300 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2022-11-03 03:31:17,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:31:17,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-03 03:31:17,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:17,312 INFO L225 Difference]: With dead ends: 76 [2022-11-03 03:31:17,312 INFO L226 Difference]: Without dead ends: 73 [2022-11-03 03:31:17,314 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 [2022-11-03 03:31:17,317 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 45 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:17,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 59 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:31:17,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-03 03:31:17,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 41. [2022-11-03 03:31:17,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 2.090909090909091) internal successors, (46), 40 states have internal predecessors, (46), 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) [2022-11-03 03:31:17,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-11-03 03:31:17,352 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 4 [2022-11-03 03:31:17,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:17,353 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-11-03 03:31:17,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:17,353 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-11-03 03:31:17,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:31:17,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:17,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:31:17,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:31:17,355 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:31:17,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:17,355 INFO L85 PathProgramCache]: Analyzing trace with hash 5402297, now seen corresponding path program 1 times [2022-11-03 03:31:17,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:17,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949173849] [2022-11-03 03:31:17,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:17,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:17,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:17,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949173849] [2022-11-03 03:31:17,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949173849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:17,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:31:17,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:31:17,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969680271] [2022-11-03 03:31:17,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:17,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:31:17,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:17,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:31:17,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:31:17,571 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:17,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:17,695 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2022-11-03 03:31:17,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:31:17,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-03 03:31:17,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:17,697 INFO L225 Difference]: With dead ends: 71 [2022-11-03 03:31:17,697 INFO L226 Difference]: Without dead ends: 71 [2022-11-03 03:31:17,698 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 [2022-11-03 03:31:17,699 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 41 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:17,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 64 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:31:17,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-03 03:31:17,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 39. [2022-11-03 03:31:17,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 2.0) internal successors, (44), 38 states have internal predecessors, (44), 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) [2022-11-03 03:31:17,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-11-03 03:31:17,706 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 4 [2022-11-03 03:31:17,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:17,707 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-11-03 03:31:17,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:17,707 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-11-03 03:31:17,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 03:31:17,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:17,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 03:31:17,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:31:17,709 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:31:17,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:17,709 INFO L85 PathProgramCache]: Analyzing trace with hash 172148575, now seen corresponding path program 1 times [2022-11-03 03:31:17,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:17,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090778800] [2022-11-03 03:31:17,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:17,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:17,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:17,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090778800] [2022-11-03 03:31:17,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090778800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:17,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:31:17,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:31:17,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503324601] [2022-11-03 03:31:17,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:17,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:31:17,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:17,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:31:17,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:31:17,779 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:17,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:17,838 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-11-03 03:31:17,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:31:17,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 03:31:17,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:17,840 INFO L225 Difference]: With dead ends: 46 [2022-11-03 03:31:17,840 INFO L226 Difference]: Without dead ends: 46 [2022-11-03 03:31:17,841 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 [2022-11-03 03:31:17,842 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:17,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 56 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:31:17,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-03 03:31:17,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2022-11-03 03:31:17,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 39 states have internal predecessors, (45), 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) [2022-11-03 03:31:17,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-11-03 03:31:17,849 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 5 [2022-11-03 03:31:17,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:17,849 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-11-03 03:31:17,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:17,850 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-11-03 03:31:17,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 03:31:17,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:17,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 03:31:17,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:31:17,851 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:31:17,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:17,852 INFO L85 PathProgramCache]: Analyzing trace with hash 896643063, now seen corresponding path program 1 times [2022-11-03 03:31:17,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:17,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092238589] [2022-11-03 03:31:17,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:17,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:17,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:17,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092238589] [2022-11-03 03:31:17,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092238589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:17,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:31:17,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:31:17,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625198948] [2022-11-03 03:31:17,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:17,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:31:17,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:17,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:31:17,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:31:17,930 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:18,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:18,012 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2022-11-03 03:31:18,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:31:18,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-03 03:31:18,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:18,014 INFO L225 Difference]: With dead ends: 54 [2022-11-03 03:31:18,014 INFO L226 Difference]: Without dead ends: 54 [2022-11-03 03:31:18,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:31:18,016 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 78 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:18,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 29 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:31:18,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-03 03:31:18,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2022-11-03 03:31:18,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 38 states have internal predecessors, (44), 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) [2022-11-03 03:31:18,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-11-03 03:31:18,022 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 6 [2022-11-03 03:31:18,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:18,022 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-11-03 03:31:18,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:18,023 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-11-03 03:31:18,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 03:31:18,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:18,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 03:31:18,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:31:18,024 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:31:18,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:18,025 INFO L85 PathProgramCache]: Analyzing trace with hash 896643064, now seen corresponding path program 1 times [2022-11-03 03:31:18,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:18,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235568532] [2022-11-03 03:31:18,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:18,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:18,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:18,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:18,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235568532] [2022-11-03 03:31:18,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235568532] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:18,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:31:18,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:31:18,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861915291] [2022-11-03 03:31:18,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:18,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:31:18,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:18,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:31:18,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:31:18,230 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:18,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:18,312 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-11-03 03:31:18,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:31:18,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-03 03:31:18,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:18,323 INFO L225 Difference]: With dead ends: 41 [2022-11-03 03:31:18,323 INFO L226 Difference]: Without dead ends: 41 [2022-11-03 03:31:18,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:31:18,325 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:18,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 20 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:31:18,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-03 03:31:18,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2022-11-03 03:31:18,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 37 states have internal predecessors, (43), 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) [2022-11-03 03:31:18,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-11-03 03:31:18,330 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 6 [2022-11-03 03:31:18,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:18,330 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-11-03 03:31:18,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:18,331 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-11-03 03:31:18,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 03:31:18,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:18,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:18,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:31:18,332 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:31:18,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:18,332 INFO L85 PathProgramCache]: Analyzing trace with hash -877899620, now seen corresponding path program 1 times [2022-11-03 03:31:18,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:18,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129340137] [2022-11-03 03:31:18,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:18,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:18,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:18,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129340137] [2022-11-03 03:31:18,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129340137] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:18,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844787007] [2022-11-03 03:31:18,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:18,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:18,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:18,488 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:18,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:31:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:18,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:31:18,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:18,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:18,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844787007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:18,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1819714709] [2022-11-03 03:31:18,682 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 03:31:18,682 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:31:18,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:31:18,692 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:31:18,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:31:18,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:18,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:18,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:31:18,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:31:18,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:31:18,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:31:19,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:19,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:19,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2022-11-03 03:31:19,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:19,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:31:19,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:19,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:31:19,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:19,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:19,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:19,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-03 03:31:19,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:19,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:19,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:19,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:19,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:19,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-03 03:31:19,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:19,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:19,372 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:31:19,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 290 treesize of output 272 [2022-11-03 03:31:19,449 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:31:19,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:31:19,515 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:31:19,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:31:20,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:20,163 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:31:20,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 714 treesize of output 709 [2022-11-03 03:31:20,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:20,250 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:31:20,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 689 treesize of output 658 [2022-11-03 03:31:20,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:20,346 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:31:20,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 690 treesize of output 691 [2022-11-03 03:31:21,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:21,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:21,227 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:31:21,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 293 treesize of output 286 [2022-11-03 03:31:21,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:21,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:21,285 INFO L356 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-03 03:31:21,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 359 treesize of output 352 [2022-11-03 03:31:21,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:21,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:21,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:21,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:21,337 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:31:21,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 375 treesize of output 360 [2022-11-03 03:31:21,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:21,548 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:31:21,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 360 treesize of output 363 [2022-11-03 03:31:21,809 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:31:21,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:31:21,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:21,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:21,844 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:31:21,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 284 treesize of output 266 [2022-11-03 03:31:21,903 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:31:21,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:31:22,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:22,169 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:31:22,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2022-11-03 03:31:22,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:22,236 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:31:22,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 292 treesize of output 293 [2022-11-03 03:31:22,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:22,310 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:31:22,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 302 [2022-11-03 03:31:22,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:22,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:22,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:22,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:22,717 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:31:22,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 305 treesize of output 290 [2022-11-03 03:31:22,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:22,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:22,780 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:31:22,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 301 treesize of output 294 [2022-11-03 03:31:22,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:22,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:22,833 INFO L356 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-03 03:31:22,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 379 treesize of output 372 [2022-11-03 03:31:23,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:23,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:23,071 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:31:25,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1819714709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:25,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:31:25,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [3, 3, 3] total 11 [2022-11-03 03:31:25,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468504660] [2022-11-03 03:31:25,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:25,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:31:25,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:25,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:31:25,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:31:25,594 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:25,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:25,897 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-11-03 03:31:25,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:31:25,898 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 03:31:25,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:25,898 INFO L225 Difference]: With dead ends: 43 [2022-11-03 03:31:25,898 INFO L226 Difference]: Without dead ends: 43 [2022-11-03 03:31:25,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:31:25,900 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 44 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:25,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 67 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:31:25,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-03 03:31:25,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-11-03 03:31:25,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.8) internal successors, (45), 39 states have internal predecessors, (45), 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) [2022-11-03 03:31:25,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-11-03 03:31:25,905 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 10 [2022-11-03 03:31:25,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:25,906 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-11-03 03:31:25,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:25,906 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-11-03 03:31:25,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 03:31:25,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:25,907 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:25,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 03:31:26,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 03:31:26,122 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:31:26,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:26,123 INFO L85 PathProgramCache]: Analyzing trace with hash -877896048, now seen corresponding path program 1 times [2022-11-03 03:31:26,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:26,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481009376] [2022-11-03 03:31:26,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:26,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:26,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:26,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481009376] [2022-11-03 03:31:26,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481009376] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:26,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085393591] [2022-11-03 03:31:26,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:26,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:26,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:26,231 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:26,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:31:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:26,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:31:26,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:26,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:26,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085393591] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:26,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1603721053] [2022-11-03 03:31:26,373 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 03:31:26,373 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:31:26,374 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:31:26,374 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:31:26,374 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:31:26,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:26,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:26,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:26,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:26,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:26,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:31:26,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:31:26,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:26,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:31:26,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:26,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:31:26,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:26,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:26,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2022-11-03 03:31:26,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:26,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:31:26,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:26,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:26,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:26,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-03 03:31:26,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:26,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:31:26,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:26,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:26,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:26,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:26,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:26,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-03 03:31:26,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:26,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:26,762 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:31:26,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 297 treesize of output 279 [2022-11-03 03:31:26,812 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:31:26,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:31:26,862 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:31:26,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:31:27,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:27,199 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:31:27,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 576 treesize of output 577 [2022-11-03 03:31:27,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:27,269 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:31:27,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 557 treesize of output 538 [2022-11-03 03:31:27,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:27,337 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:31:27,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 562 treesize of output 563 [2022-11-03 03:31:27,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:27,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:27,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:27,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:27,934 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:31:27,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 297 treesize of output 282 [2022-11-03 03:31:27,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:27,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:27,975 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:31:27,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 293 treesize of output 286 [2022-11-03 03:31:27,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:27,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:28,015 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:31:28,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 305 treesize of output 298 [2022-11-03 03:31:28,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:28,180 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:31:28,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 360 treesize of output 363 [2022-11-03 03:31:28,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:28,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:28,393 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:31:28,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 297 treesize of output 279 [2022-11-03 03:31:28,441 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:31:28,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:31:28,487 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:31:28,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:31:28,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:28,808 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:31:28,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 576 treesize of output 577 [2022-11-03 03:31:28,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:28,875 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:31:28,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 557 treesize of output 538 [2022-11-03 03:31:28,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:28,943 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:31:28,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 562 treesize of output 563 [2022-11-03 03:31:29,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:29,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:29,402 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:31:29,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 293 treesize of output 286 [2022-11-03 03:31:29,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:29,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:29,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:29,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:29,437 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:31:29,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 363 treesize of output 348 [2022-11-03 03:31:29,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:29,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:29,480 INFO L356 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-03 03:31:29,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 359 treesize of output 352 [2022-11-03 03:31:29,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:29,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:29,631 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:31:32,063 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '763#(and (= |ULTIMATE.start_main_~s~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~new_data~0#1| |ULTIMATE.start_sll_update_at_#in~data#1|) (= |ULTIMATE.start_sll_update_at_~head#1.base| |ULTIMATE.start_sll_update_at_#in~head#1.base|) (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (= |ULTIMATE.start_sll_update_at_~index#1| |ULTIMATE.start_sll_update_at_#in~index#1|) (= |ULTIMATE.start_sll_update_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_sll_update_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_update_at_#in~head#1.offset| |ULTIMATE.start_sll_update_at_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (= |ULTIMATE.start_sll_update_at_~data#1| |ULTIMATE.start_sll_update_at_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~new_data~0#1|) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (not (= (select |#valid| |ULTIMATE.start_sll_update_at_~head#1.base|) 1)) (= |ULTIMATE.start_sll_update_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 03:31:32,063 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:31:32,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:31:32,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-11-03 03:31:32,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435581929] [2022-11-03 03:31:32,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:31:32,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:31:32,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:32,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:31:32,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:31:32,065 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:32,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:32,116 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-11-03 03:31:32,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:31:32,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 03:31:32,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:32,118 INFO L225 Difference]: With dead ends: 45 [2022-11-03 03:31:32,118 INFO L226 Difference]: Without dead ends: 45 [2022-11-03 03:31:32,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:31:32,119 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:32,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 54 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:31:32,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-03 03:31:32,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-03 03:31:32,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 44 states have internal predecessors, (50), 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) [2022-11-03 03:31:32,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2022-11-03 03:31:32,123 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 10 [2022-11-03 03:31:32,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:32,124 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2022-11-03 03:31:32,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:32,124 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2022-11-03 03:31:32,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 03:31:32,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:32,125 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-03 03:31:32,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:32,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 03:31:32,330 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:31:32,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:32,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1276636301, now seen corresponding path program 2 times [2022-11-03 03:31:32,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:32,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674188186] [2022-11-03 03:31:32,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:32,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:32,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:31:32,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:32,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674188186] [2022-11-03 03:31:32,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674188186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:32,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:31:32,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:31:32,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652608689] [2022-11-03 03:31:32,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:32,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:31:32,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:32,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:31:32,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:31:32,514 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:32,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:32,654 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2022-11-03 03:31:32,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:31:32,655 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-03 03:31:32,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:32,655 INFO L225 Difference]: With dead ends: 62 [2022-11-03 03:31:32,655 INFO L226 Difference]: Without dead ends: 62 [2022-11-03 03:31:32,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:31:32,656 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 196 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:32,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 44 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:31:32,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-03 03:31:32,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2022-11-03 03:31:32,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.696969696969697) internal successors, (56), 47 states have internal predecessors, (56), 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) [2022-11-03 03:31:32,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-11-03 03:31:32,660 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 15 [2022-11-03 03:31:32,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:32,661 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-11-03 03:31:32,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:32,661 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-11-03 03:31:32,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 03:31:32,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:32,661 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-03 03:31:32,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 03:31:32,662 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:31:32,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:32,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1276636300, now seen corresponding path program 1 times [2022-11-03 03:31:32,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:32,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249897206] [2022-11-03 03:31:32,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:32,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:31:32,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:32,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249897206] [2022-11-03 03:31:32,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249897206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:32,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:31:32,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:31:32,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329760262] [2022-11-03 03:31:32,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:32,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:31:32,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:32,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:31:32,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:31:32,898 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 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) [2022-11-03 03:31:33,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:33,066 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2022-11-03 03:31:33,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:31:33,067 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 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 15 [2022-11-03 03:31:33,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:33,067 INFO L225 Difference]: With dead ends: 72 [2022-11-03 03:31:33,067 INFO L226 Difference]: Without dead ends: 72 [2022-11-03 03:31:33,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:31:33,068 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 294 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:33,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 33 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:31:33,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-03 03:31:33,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 48. [2022-11-03 03:31:33,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 47 states have internal predecessors, (54), 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) [2022-11-03 03:31:33,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-11-03 03:31:33,072 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 15 [2022-11-03 03:31:33,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:33,073 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-11-03 03:31:33,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 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) [2022-11-03 03:31:33,073 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-11-03 03:31:33,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 03:31:33,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:33,073 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:33,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:31:33,074 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:31:33,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:33,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1752066666, now seen corresponding path program 1 times [2022-11-03 03:31:33,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:33,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273740984] [2022-11-03 03:31:33,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:33,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:33,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:31:33,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:33,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273740984] [2022-11-03 03:31:33,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273740984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:33,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:31:33,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:31:33,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651721730] [2022-11-03 03:31:33,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:33,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:31:33,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:33,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:31:33,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:31:33,179 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-11-03 03:31:33,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:33,327 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2022-11-03 03:31:33,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:31:33,327 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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 19 [2022-11-03 03:31:33,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:33,328 INFO L225 Difference]: With dead ends: 133 [2022-11-03 03:31:33,328 INFO L226 Difference]: Without dead ends: 133 [2022-11-03 03:31:33,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:31:33,329 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 151 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:33,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 60 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:31:33,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-03 03:31:33,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 51. [2022-11-03 03:31:33,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 50 states have internal predecessors, (60), 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) [2022-11-03 03:31:33,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2022-11-03 03:31:33,333 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 19 [2022-11-03 03:31:33,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:33,334 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2022-11-03 03:31:33,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-11-03 03:31:33,334 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2022-11-03 03:31:33,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 03:31:33,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:33,335 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:33,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 03:31:33,336 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:31:33,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:33,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1752066665, now seen corresponding path program 1 times [2022-11-03 03:31:33,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:33,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832614432] [2022-11-03 03:31:33,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:33,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:31:33,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:33,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832614432] [2022-11-03 03:31:33,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832614432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:33,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122963853] [2022-11-03 03:31:33,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:33,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:33,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:33,438 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:33,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:31:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:33,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:31:33,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:33,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:31:33,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:33,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:31:33,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122963853] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:33,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1604908621] [2022-11-03 03:31:33,669 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-03 03:31:33,669 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:31:33,670 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:31:33,670 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:31:33,670 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:31:33,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:33,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:33,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:33,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:31:33,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:31:33,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:33,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:33,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:33,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:31:33,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:33,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:31:33,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:33,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:33,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2022-11-03 03:31:33,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:33,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:31:33,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:33,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:31:33,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:33,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:33,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:33,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-03 03:31:33,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:33,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:33,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:33,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:33,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:33,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-03 03:31:34,011 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:31:34,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:31:34,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:34,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:34,075 INFO L356 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-03 03:31:34,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 284 treesize of output 276 [2022-11-03 03:31:34,119 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:31:34,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 274 treesize of output 281 [2022-11-03 03:31:34,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:34,583 INFO L356 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-03 03:31:34,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 821 treesize of output 790 [2022-11-03 03:31:34,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:34,659 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:31:34,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 826 treesize of output 821 [2022-11-03 03:31:34,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:34,726 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:31:34,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 814 treesize of output 809 [2022-11-03 03:31:35,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:35,243 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:31:35,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 297 treesize of output 282 [2022-11-03 03:31:35,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:35,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:35,294 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:31:35,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 293 treesize of output 286 [2022-11-03 03:31:35,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:35,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:35,335 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:31:35,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 305 treesize of output 298 [2022-11-03 03:31:35,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,492 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:31:35,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 360 treesize of output 363 [2022-11-03 03:31:35,714 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:31:35,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:31:35,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,783 INFO L356 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-03 03:31:35,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 284 treesize of output 276 [2022-11-03 03:31:35,828 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:31:35,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 274 treesize of output 281 [2022-11-03 03:31:36,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:36,097 INFO L356 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-03 03:31:36,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 308 treesize of output 313 [2022-11-03 03:31:36,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:36,156 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:31:36,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 317 treesize of output 318 [2022-11-03 03:31:36,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:36,220 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:31:36,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2022-11-03 03:31:36,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:36,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:36,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:36,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:36,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:36,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:36,544 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:31:36,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 330 treesize of output 315 [2022-11-03 03:31:36,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:36,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:36,588 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:31:36,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 326 treesize of output 319 [2022-11-03 03:31:36,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:36,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:36,632 INFO L356 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-03 03:31:36,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 380 treesize of output 373 [2022-11-03 03:31:36,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:36,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:36,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:36,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:36,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:36,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:36,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:36,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:36,934 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:31:39,554 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1434#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (not (<= (+ |ULTIMATE.start_sll_get_data_at_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_get_data_at_~head#1.base|))) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_sll_get_data_at_~head#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 03:31:39,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:31:39,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:31:39,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-11-03 03:31:39,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413887499] [2022-11-03 03:31:39,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:31:39,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:31:39,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:39,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:31:39,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:31:39,559 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 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) [2022-11-03 03:31:39,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:39,628 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2022-11-03 03:31:39,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:31:39,629 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 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 19 [2022-11-03 03:31:39,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:39,630 INFO L225 Difference]: With dead ends: 68 [2022-11-03 03:31:39,630 INFO L226 Difference]: Without dead ends: 68 [2022-11-03 03:31:39,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:31:39,632 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 110 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:39,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 76 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:31:39,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-03 03:31:39,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2022-11-03 03:31:39,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.702127659574468) internal successors, (80), 61 states have internal predecessors, (80), 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) [2022-11-03 03:31:39,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2022-11-03 03:31:39,646 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 19 [2022-11-03 03:31:39,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:39,647 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2022-11-03 03:31:39,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 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) [2022-11-03 03:31:39,647 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2022-11-03 03:31:39,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 03:31:39,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:39,650 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:39,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:39,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 03:31:39,859 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:31:39,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:39,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1407041625, now seen corresponding path program 1 times [2022-11-03 03:31:39,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:39,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244213057] [2022-11-03 03:31:39,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:39,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:39,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:31:40,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:40,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244213057] [2022-11-03 03:31:40,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244213057] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:40,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968991430] [2022-11-03 03:31:40,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:40,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:40,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:40,009 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:40,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:31:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:40,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:31:40,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:31:40,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:31:40,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968991430] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:40,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [119324709] [2022-11-03 03:31:40,208 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 03:31:40,208 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:31:40,209 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:31:40,209 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:31:40,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:31:40,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:40,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:40,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:40,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:31:40,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:40,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:40,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:31:40,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:40,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:31:40,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:40,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:40,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2022-11-03 03:31:40,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:40,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:31:40,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:40,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:40,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:40,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-03 03:31:40,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:40,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:31:40,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:40,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:31:40,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:40,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:40,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:40,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:40,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:40,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-03 03:31:40,540 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:31:40,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:31:40,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:40,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:40,568 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:31:40,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 291 treesize of output 273 [2022-11-03 03:31:40,615 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:31:40,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:31:40,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:40,990 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:31:40,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 989 treesize of output 938 [2022-11-03 03:31:41,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:41,068 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:31:41,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 986 treesize of output 981 [2022-11-03 03:31:41,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:41,133 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:31:41,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 974 treesize of output 969 [2022-11-03 03:31:41,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:41,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:41,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:41,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:41,827 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:31:41,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 293 treesize of output 278 [2022-11-03 03:31:41,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:41,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:41,867 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:31:41,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 289 treesize of output 282 [2022-11-03 03:31:41,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:41,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:41,906 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:31:41,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 301 treesize of output 294 [2022-11-03 03:31:42,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:42,049 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:31:42,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 350 treesize of output 353 [2022-11-03 03:31:42,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:42,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:42,234 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:31:42,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 297 treesize of output 279 [2022-11-03 03:31:42,278 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:31:42,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:31:42,337 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:31:42,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:31:42,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:42,567 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:31:42,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 576 treesize of output 577 [2022-11-03 03:31:42,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:42,638 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:31:42,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 570 treesize of output 571 [2022-11-03 03:31:42,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:42,706 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:31:42,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 551 treesize of output 532 [2022-11-03 03:31:42,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:42,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:43,012 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:31:43,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 293 treesize of output 286 [2022-11-03 03:31:43,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:43,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:43,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:43,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:43,046 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:31:43,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 309 treesize of output 294 [2022-11-03 03:31:43,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:43,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:43,092 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:31:43,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 305 treesize of output 298 [2022-11-03 03:31:43,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:43,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:43,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:43,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:43,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:43,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:43,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:43,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:43,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:43,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:43,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:43,558 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:31:45,979 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1696#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_update_at_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_update_at_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (< 0 |ULTIMATE.start_sll_update_at_~index#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_sll_update_at_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 03:31:45,980 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:31:45,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:31:45,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-11-03 03:31:45,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406032037] [2022-11-03 03:31:45,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:31:45,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:31:45,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:45,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:31:45,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:31:45,982 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-11-03 03:31:46,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:46,112 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2022-11-03 03:31:46,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:31:46,113 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 20 [2022-11-03 03:31:46,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:46,114 INFO L225 Difference]: With dead ends: 88 [2022-11-03 03:31:46,115 INFO L226 Difference]: Without dead ends: 88 [2022-11-03 03:31:46,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:31:46,116 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 82 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:46,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 92 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:31:46,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-03 03:31:46,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2022-11-03 03:31:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.68) internal successors, (84), 64 states have internal predecessors, (84), 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) [2022-11-03 03:31:46,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2022-11-03 03:31:46,120 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 20 [2022-11-03 03:31:46,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:46,120 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2022-11-03 03:31:46,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-11-03 03:31:46,121 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2022-11-03 03:31:46,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 03:31:46,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:46,121 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:46,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-03 03:31:46,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:46,334 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:31:46,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:46,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1407045197, now seen corresponding path program 1 times [2022-11-03 03:31:46,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:46,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415785203] [2022-11-03 03:31:46,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:46,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:47,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:31:47,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:47,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415785203] [2022-11-03 03:31:47,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415785203] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:47,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744580325] [2022-11-03 03:31:47,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:47,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:47,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:47,113 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:47,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:31:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:47,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 03:31:47,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:47,266 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:31:47,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-03 03:31:47,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:47,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:47,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 22 [2022-11-03 03:31:47,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-03 03:31:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:31:47,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:31:54,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744580325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:54,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1555061476] [2022-11-03 03:31:54,096 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 03:31:54,096 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:31:54,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:31:54,097 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:31:54,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:31:54,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:54,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:54,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:54,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:31:54,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:31:54,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:54,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:54,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:54,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:54,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2022-11-03 03:31:54,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:54,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:31:54,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:54,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:31:54,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:54,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:54,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:54,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-03 03:31:54,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:54,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:31:54,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:54,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:31:54,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:54,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:54,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:54,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:54,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:54,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-03 03:31:54,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:54,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:54,447 INFO L356 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-03 03:31:54,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 290 treesize of output 282 [2022-11-03 03:31:54,504 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:31:54,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 280 treesize of output 287 [2022-11-03 03:31:54,555 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:31:54,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 274 treesize of output 281 [2022-11-03 03:31:54,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:54,811 INFO L356 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-03 03:31:54,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 308 treesize of output 313 [2022-11-03 03:31:54,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:54,885 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:31:54,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 317 treesize of output 318 [2022-11-03 03:31:54,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:54,951 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:31:54,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2022-11-03 03:31:55,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:55,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:55,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:55,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:55,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:55,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:55,330 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:31:55,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 332 treesize of output 317 [2022-11-03 03:31:55,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:55,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:55,375 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:31:55,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 328 treesize of output 321 [2022-11-03 03:31:55,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:55,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:55,423 INFO L356 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-03 03:31:55,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 382 treesize of output 375 [2022-11-03 03:31:55,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:55,610 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:31:55,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 455 treesize of output 458 [2022-11-03 03:31:55,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:55,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:55,877 INFO L356 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-03 03:31:55,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 290 treesize of output 282 [2022-11-03 03:31:55,927 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:31:55,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 280 treesize of output 287 [2022-11-03 03:31:55,983 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:31:55,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 274 treesize of output 281 [2022-11-03 03:31:56,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:56,437 INFO L356 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-03 03:31:56,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 821 treesize of output 790 [2022-11-03 03:31:56,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:56,508 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:31:56,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 826 treesize of output 821 [2022-11-03 03:31:56,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:56,576 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:31:56,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 814 treesize of output 809 [2022-11-03 03:31:57,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:57,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:57,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:57,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:57,205 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:31:57,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 297 treesize of output 282 [2022-11-03 03:31:57,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:57,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:57,246 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:31:57,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 293 treesize of output 286 [2022-11-03 03:31:57,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:57,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:57,284 INFO L356 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-03 03:31:57,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 359 treesize of output 352 [2022-11-03 03:31:57,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:57,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:57,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:57,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:57,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:57,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:57,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:57,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:57,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:57,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:57,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:57,699 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:32:00,559 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2002#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_update_at_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= 0 |ULTIMATE.start_sll_update_at_#in~index#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 2 |ULTIMATE.start_sll_update_at_~data#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (not (< 0 |ULTIMATE.start_sll_update_at_~index#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_update_at_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 2 |ULTIMATE.start_sll_update_at_#in~data#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 2 |ULTIMATE.start_main_~new_data~0#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_sll_update_at_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 03:32:00,559 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:32:00,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:32:00,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-11-03 03:32:00,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458141600] [2022-11-03 03:32:00,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:32:00,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 03:32:00,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:00,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 03:32:00,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=932, Unknown=1, NotChecked=0, Total=1056 [2022-11-03 03:32:00,561 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 23 states have internal predecessors, (47), 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) [2022-11-03 03:32:01,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:01,234 INFO L93 Difference]: Finished difference Result 131 states and 168 transitions. [2022-11-03 03:32:01,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:32:01,235 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 23 states have internal predecessors, (47), 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 20 [2022-11-03 03:32:01,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:01,236 INFO L225 Difference]: With dead ends: 131 [2022-11-03 03:32:01,236 INFO L226 Difference]: Without dead ends: 131 [2022-11-03 03:32:01,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=259, Invalid=1380, Unknown=1, NotChecked=0, Total=1640 [2022-11-03 03:32:01,237 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 569 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:01,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [569 Valid, 167 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 375 Invalid, 0 Unknown, 34 Unchecked, 0.4s Time] [2022-11-03 03:32:01,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-03 03:32:01,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 72. [2022-11-03 03:32:01,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 71 states have internal predecessors, (96), 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) [2022-11-03 03:32:01,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 96 transitions. [2022-11-03 03:32:01,241 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 96 transitions. Word has length 20 [2022-11-03 03:32:01,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:01,241 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 96 transitions. [2022-11-03 03:32:01,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 23 states have internal predecessors, (47), 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) [2022-11-03 03:32:01,242 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 96 transitions. [2022-11-03 03:32:01,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 03:32:01,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:01,250 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:01,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:01,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:01,451 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:32:01,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:01,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1407045198, now seen corresponding path program 1 times [2022-11-03 03:32:01,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:01,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202789450] [2022-11-03 03:32:01,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:01,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:32:02,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:02,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202789450] [2022-11-03 03:32:02,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202789450] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:02,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903731689] [2022-11-03 03:32:02,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:02,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:02,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:02,370 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:02,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:32:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:02,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 03:32:02,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:02,608 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:32:02,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-03 03:32:02,625 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 03:32:02,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 03:32:02,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:32:02,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:32:02,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:02,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 40 treesize of output 33 [2022-11-03 03:32:02,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:02,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 34 [2022-11-03 03:32:02,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2022-11-03 03:32:02,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2022-11-03 03:32:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:32:03,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:06,637 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_36| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_36|) (forall ((v_ArrVal_620 Int) (v_ArrVal_617 Int)) (<= (+ (select (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_36| v_ArrVal_620) .cse1) 4) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_36| v_ArrVal_617) .cse1)))))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_36| Int)) (or (forall ((v_ArrVal_620 Int)) (<= 0 (select (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_36| v_ArrVal_620) .cse1))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_36|))))) is different from false [2022-11-03 03:32:08,660 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (.cse1 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_36| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_36|) (forall ((v_ArrVal_620 Int)) (<= 0 (select (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_36| v_ArrVal_620) .cse1))))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_36| Int)) (or (forall ((v_ArrVal_620 Int) (v_ArrVal_617 Int)) (<= (+ (select (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_36| v_ArrVal_620) .cse1) 4) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_36| v_ArrVal_617) .cse1)))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_36|))))) is different from false [2022-11-03 03:32:08,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-03 03:32:08,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:08,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-11-03 03:32:08,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-11-03 03:32:08,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:08,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:10,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 48 treesize of output 44 [2022-11-03 03:32:10,916 INFO L356 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2022-11-03 03:32:10,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 44 treesize of output 57 [2022-11-03 03:32:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-03 03:32:10,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903731689] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:10,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [106445797] [2022-11-03 03:32:10,981 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 03:32:10,982 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:32:10,982 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:32:10,982 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:32:10,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:32:11,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:11,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:11,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:11,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:11,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:11,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:32:11,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:32:11,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:11,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:32:11,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:11,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:11,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2022-11-03 03:32:11,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:11,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:32:11,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:11,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:11,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:11,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-03 03:32:11,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:11,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:32:11,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:11,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:32:11,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:11,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:11,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:11,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:11,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:11,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-03 03:32:11,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:11,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:11,283 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:32:11,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 290 treesize of output 272 [2022-11-03 03:32:11,332 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:11,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:32:11,388 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:11,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:32:11,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:11,710 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:11,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 562 treesize of output 563 [2022-11-03 03:32:11,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:11,774 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:32:11,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 543 treesize of output 524 [2022-11-03 03:32:11,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:11,847 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:11,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 548 treesize of output 549 [2022-11-03 03:32:12,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:12,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:12,174 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:32:12,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 324 treesize of output 317 [2022-11-03 03:32:12,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:12,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:12,221 INFO L356 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-03 03:32:12,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 408 treesize of output 401 [2022-11-03 03:32:12,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:12,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:12,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:12,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:12,260 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:32:12,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 454 treesize of output 439 [2022-11-03 03:32:12,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:12,460 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:32:12,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 439 treesize of output 442 [2022-11-03 03:32:12,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:12,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:12,687 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:32:12,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 290 treesize of output 272 [2022-11-03 03:32:12,739 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:12,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:32:12,792 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:12,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:32:13,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:13,162 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:13,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 714 treesize of output 709 [2022-11-03 03:32:13,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:13,232 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:13,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 702 treesize of output 703 [2022-11-03 03:32:13,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:13,305 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:32:13,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 683 treesize of output 652 [2022-11-03 03:32:13,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:13,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:13,807 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:32:13,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 314 treesize of output 307 [2022-11-03 03:32:13,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:13,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:13,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:13,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:13,850 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:32:13,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 396 treesize of output 381 [2022-11-03 03:32:13,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:13,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:13,888 INFO L356 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-03 03:32:13,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 392 treesize of output 385 [2022-11-03 03:32:14,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:14,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:14,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:14,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:14,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:14,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:14,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:14,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:14,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:14,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:14,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:14,357 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:32:18,060 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2379#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_update_at_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= 0 |ULTIMATE.start_sll_update_at_#in~index#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 2 |ULTIMATE.start_sll_update_at_~data#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (or (not (<= 0 |ULTIMATE.start_sll_update_at_~head#1.offset|)) (not (<= (+ 4 |ULTIMATE.start_sll_update_at_~head#1.offset|) (select |#length| |ULTIMATE.start_sll_update_at_~head#1.base|)))) (not (< 0 |ULTIMATE.start_sll_update_at_~index#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_update_at_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 2 |ULTIMATE.start_sll_update_at_#in~data#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 2 |ULTIMATE.start_main_~new_data~0#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 03:32:18,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:32:18,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:32:18,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2022-11-03 03:32:18,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820426421] [2022-11-03 03:32:18,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:32:18,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 03:32:18,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:18,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 03:32:18,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1344, Unknown=2, NotChecked=150, Total=1640 [2022-11-03 03:32:18,064 INFO L87 Difference]: Start difference. First operand 72 states and 96 transitions. Second operand has 31 states, 30 states have (on average 1.8) internal successors, (54), 31 states have internal predecessors, (54), 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) [2022-11-03 03:32:19,570 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (.cse1 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (let ((.cse3 (select .cse2 .cse1)) (.cse4 (select .cse0 .cse1))) (and (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (<= 8 (select |c_#length| |c_ULTIMATE.start_node_create_~temp~0#1.base|)) (<= 8 (select |c_#length| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_36| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_36|) (forall ((v_ArrVal_620 Int)) (<= 0 (select (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_36| v_ArrVal_620) .cse1))))) (<= 8 (select |c_#length| (select .cse2 4))) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (= (select |c_#valid| |c_ULTIMATE.start_node_create_~temp~0#1.base|) 1) (<= 8 (select |c_#length| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_36| Int)) (or (forall ((v_ArrVal_620 Int) (v_ArrVal_617 Int)) (<= (+ (select (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_36| v_ArrVal_620) .cse1) 4) (select |c_#length| (select (store .cse2 |v_ULTIMATE.start_sll_update_at_~head#1.offset_36| v_ArrVal_617) .cse1)))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_36|))) (not (= .cse3 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (<= (+ .cse4 8) (select |c_#length| .cse3)) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (<= 0 .cse4) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 1) (= (select .cse0 4) 0)))) is different from false [2022-11-03 03:32:20,487 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse1 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse3 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse2 (select .cse1 .cse3)) (.cse4 (select .cse0 .cse3))) (and (<= 8 (select |c_#length| (select .cse0 4))) (= (select .cse1 4) 0) (<= 0 .cse2) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_36| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_36|) (forall ((v_ArrVal_620 Int) (v_ArrVal_617 Int)) (<= (+ (select (store .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_36| v_ArrVal_620) .cse3) 4) (select |c_#length| (select (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_36| v_ArrVal_617) .cse3)))))) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (<= (+ 8 .cse2) (select |c_#length| .cse4)) (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse4)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_36| Int)) (or (forall ((v_ArrVal_620 Int)) (<= 0 (select (store .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_36| v_ArrVal_620) .cse3))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_36|)))))) is different from false [2022-11-03 03:32:21,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:21,379 INFO L93 Difference]: Finished difference Result 166 states and 222 transitions. [2022-11-03 03:32:21,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 03:32:21,379 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 31 states have internal predecessors, (54), 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 20 [2022-11-03 03:32:21,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:21,380 INFO L225 Difference]: With dead ends: 166 [2022-11-03 03:32:21,380 INFO L226 Difference]: Without dead ends: 166 [2022-11-03 03:32:21,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=270, Invalid=2094, Unknown=4, NotChecked=388, Total=2756 [2022-11-03 03:32:21,382 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 428 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:21,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 422 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 674 Invalid, 0 Unknown, 256 Unchecked, 0.6s Time] [2022-11-03 03:32:21,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-03 03:32:21,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 77. [2022-11-03 03:32:21,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 76 states have internal predecessors, (104), 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) [2022-11-03 03:32:21,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 104 transitions. [2022-11-03 03:32:21,386 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 104 transitions. Word has length 20 [2022-11-03 03:32:21,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:21,387 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 104 transitions. [2022-11-03 03:32:21,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 31 states have internal predecessors, (54), 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) [2022-11-03 03:32:21,387 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 104 transitions. [2022-11-03 03:32:21,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 03:32:21,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:21,388 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:21,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:21,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 03:32:21,610 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:32:21,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:21,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1734910987, now seen corresponding path program 2 times [2022-11-03 03:32:21,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:21,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530534321] [2022-11-03 03:32:21,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:21,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:32:21,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:21,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530534321] [2022-11-03 03:32:21,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530534321] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:21,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566057991] [2022-11-03 03:32:21,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:32:21,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:21,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:21,713 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:21,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:32:21,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:32:21,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:32:21,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 03:32:21,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:32:21,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:21,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566057991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:21,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:32:21,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2022-11-03 03:32:21,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82027366] [2022-11-03 03:32:21,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:21,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:32:21,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:21,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:32:21,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:32:21,948 INFO L87 Difference]: Start difference. First operand 77 states and 104 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:22,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:22,092 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2022-11-03 03:32:22,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:32:22,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-03 03:32:22,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:22,094 INFO L225 Difference]: With dead ends: 95 [2022-11-03 03:32:22,094 INFO L226 Difference]: Without dead ends: 95 [2022-11-03 03:32:22,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:32:22,095 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 181 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:22,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 46 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:32:22,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-03 03:32:22,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2022-11-03 03:32:22,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.6129032258064515) internal successors, (100), 76 states have internal predecessors, (100), 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) [2022-11-03 03:32:22,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 100 transitions. [2022-11-03 03:32:22,098 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 100 transitions. Word has length 22 [2022-11-03 03:32:22,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:22,098 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 100 transitions. [2022-11-03 03:32:22,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:22,098 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2022-11-03 03:32:22,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 03:32:22,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:22,099 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:22,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:22,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 03:32:22,300 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:32:22,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:22,300 INFO L85 PathProgramCache]: Analyzing trace with hash -802088496, now seen corresponding path program 1 times [2022-11-03 03:32:22,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:22,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955813613] [2022-11-03 03:32:22,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:22,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:32:22,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:22,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955813613] [2022-11-03 03:32:22,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955813613] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:22,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423192649] [2022-11-03 03:32:22,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:22,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:22,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:22,431 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:22,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 03:32:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:22,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:32:22,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:32:22,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:32:22,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423192649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:22,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [978337506] [2022-11-03 03:32:22,642 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 03:32:22,643 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:32:22,643 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:32:22,643 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:32:22,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:32:22,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:22,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:22,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:22,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:32:22,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:22,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:22,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:32:22,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:22,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:22,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2022-11-03 03:32:22,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:22,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:32:22,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:22,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:32:22,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:22,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:22,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:22,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-03 03:32:22,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:22,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:32:22,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:22,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:32:22,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:22,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:22,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:22,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:22,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:22,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-03 03:32:22,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:22,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:22,975 INFO L356 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-03 03:32:22,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 290 treesize of output 282 [2022-11-03 03:32:23,036 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:23,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 280 treesize of output 287 [2022-11-03 03:32:23,095 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:23,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 274 treesize of output 281 [2022-11-03 03:32:23,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:23,563 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:23,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 986 treesize of output 975 [2022-11-03 03:32:23,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:23,643 INFO L356 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-03 03:32:23,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 955 treesize of output 912 [2022-11-03 03:32:23,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:23,724 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:23,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 956 treesize of output 951 [2022-11-03 03:32:24,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:24,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:24,284 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:32:24,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 293 treesize of output 286 [2022-11-03 03:32:24,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:24,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:24,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:24,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:24,321 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:32:24,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 309 treesize of output 294 [2022-11-03 03:32:24,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:24,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:24,365 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:32:24,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 305 treesize of output 298 [2022-11-03 03:32:24,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:24,495 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:32:24,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 360 treesize of output 363 [2022-11-03 03:32:24,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:24,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:24,678 INFO L356 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-03 03:32:24,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 290 treesize of output 282 [2022-11-03 03:32:24,730 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:24,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 280 treesize of output 287 [2022-11-03 03:32:24,783 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:24,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 274 treesize of output 281 [2022-11-03 03:32:25,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:25,330 INFO L356 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-03 03:32:25,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1233 treesize of output 1170 [2022-11-03 03:32:25,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:25,420 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:25,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1230 treesize of output 1219 [2022-11-03 03:32:25,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:25,491 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:25,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1212 treesize of output 1201 [2022-11-03 03:32:26,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:26,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:26,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:26,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:26,172 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:32:26,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 297 treesize of output 282 [2022-11-03 03:32:26,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:26,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:26,210 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:32:26,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 293 treesize of output 286 [2022-11-03 03:32:26,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:26,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:26,246 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:32:26,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 305 treesize of output 298 [2022-11-03 03:32:26,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:26,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:26,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:26,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:26,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:26,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:26,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:26,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:26,554 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:32:29,859 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3055#(and (<= (+ |ULTIMATE.start_sll_get_data_at_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_get_data_at_~head#1.base|)) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_sll_get_data_at_~head#1.base|) |ULTIMATE.start_sll_get_data_at_~head#1.offset|) |ULTIMATE.start_sll_get_data_at_#res#1|) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (not (= |ULTIMATE.start_sll_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_get_data_at_~head#1.base|) 1) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_sll_get_data_at_~head#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2022-11-03 03:32:29,859 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:32:29,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:32:29,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-11-03 03:32:29,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807763272] [2022-11-03 03:32:29,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:32:29,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:32:29,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:29,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:32:29,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:32:29,861 INFO L87 Difference]: Start difference. First operand 77 states and 100 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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) [2022-11-03 03:32:29,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:29,989 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2022-11-03 03:32:29,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:32:29,990 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 24 [2022-11-03 03:32:29,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:29,991 INFO L225 Difference]: With dead ends: 77 [2022-11-03 03:32:29,991 INFO L226 Difference]: Without dead ends: 77 [2022-11-03 03:32:29,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:32:29,992 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:29,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 128 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:32:29,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-03 03:32:29,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2022-11-03 03:32:29,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 56 states have (on average 1.5714285714285714) internal successors, (88), 70 states have internal predecessors, (88), 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) [2022-11-03 03:32:29,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-11-03 03:32:29,995 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 24 [2022-11-03 03:32:29,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:29,996 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-11-03 03:32:29,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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) [2022-11-03 03:32:29,996 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-11-03 03:32:29,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 03:32:29,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:29,997 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2022-11-03 03:32:30,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:30,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:30,197 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:32:30,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:30,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1047313855, now seen corresponding path program 2 times [2022-11-03 03:32:30,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:30,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412982920] [2022-11-03 03:32:30,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:30,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 03:32:30,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:30,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412982920] [2022-11-03 03:32:30,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412982920] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:30,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781737127] [2022-11-03 03:32:30,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:32:30,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:30,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:30,335 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:30,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 03:32:30,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:32:30,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:32:30,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:32:30,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:32:30,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:32:30,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781737127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:30,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [459792237] [2022-11-03 03:32:30,624 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 03:32:30,624 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:32:30,624 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:32:30,625 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:32:30,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:32:30,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:30,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:32:30,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:30,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:32:30,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2022-11-03 03:32:30,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:32:30,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:32:30,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:30,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:32:30,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-03 03:32:30,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:30,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:32:30,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-03 03:32:30,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,894 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:32:30,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 290 treesize of output 272 [2022-11-03 03:32:30,941 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:30,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:32:30,990 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:30,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:32:31,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:31,339 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:31,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 974 treesize of output 969 [2022-11-03 03:32:31,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:31,404 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:32:31,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 949 treesize of output 898 [2022-11-03 03:32:31,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:31,473 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:31,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 946 treesize of output 941 [2022-11-03 03:32:31,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:31,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:31,924 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:32:31,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 313 treesize of output 306 [2022-11-03 03:32:31,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:31,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:31,965 INFO L356 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-03 03:32:31,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 349 treesize of output 342 [2022-11-03 03:32:31,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:31,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:31,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:31,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:32,001 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:32:32,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 425 treesize of output 410 [2022-11-03 03:32:32,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,156 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:32:32,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 410 treesize of output 413 [2022-11-03 03:32:32,335 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:32,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:32:32,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,362 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:32:32,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 284 treesize of output 266 [2022-11-03 03:32:32,407 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:32,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:32:32,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,616 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:32,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 562 treesize of output 563 [2022-11-03 03:32:32,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:32,685 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:32:32,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 543 treesize of output 524 [2022-11-03 03:32:32,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,744 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:32,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 548 treesize of output 549 [2022-11-03 03:32:33,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:33,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:33,147 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:32:33,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 293 treesize of output 286 [2022-11-03 03:32:33,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:33,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:33,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:33,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:33,178 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:32:33,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 363 treesize of output 348 [2022-11-03 03:32:33,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:33,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:33,214 INFO L356 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-03 03:32:33,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 359 treesize of output 352 [2022-11-03 03:32:33,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:33,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:33,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:33,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:33,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:33,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:33,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:33,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:33,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:33,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:33,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:33,605 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:32:36,039 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3370#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_update_at_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= 0 |ULTIMATE.start_sll_update_at_#in~index#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 2 |ULTIMATE.start_sll_update_at_~data#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_update_at_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 2 |ULTIMATE.start_sll_update_at_#in~data#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 2 |ULTIMATE.start_main_~new_data~0#1|) (< 0 |ULTIMATE.start_sll_update_at_~index#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_sll_update_at_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 03:32:36,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:32:36,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:32:36,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-11-03 03:32:36,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823997358] [2022-11-03 03:32:36,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:32:36,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:32:36,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:36,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:32:36,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:32:36,042 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 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) [2022-11-03 03:32:36,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:36,178 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2022-11-03 03:32:36,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:32:36,179 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 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 25 [2022-11-03 03:32:36,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:36,180 INFO L225 Difference]: With dead ends: 62 [2022-11-03 03:32:36,180 INFO L226 Difference]: Without dead ends: 62 [2022-11-03 03:32:36,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2022-11-03 03:32:36,181 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 114 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:36,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 77 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:32:36,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-03 03:32:36,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2022-11-03 03:32:36,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 45 states have (on average 1.4666666666666666) internal successors, (66), 55 states have internal predecessors, (66), 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) [2022-11-03 03:32:36,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-11-03 03:32:36,185 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 25 [2022-11-03 03:32:36,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:36,185 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-11-03 03:32:36,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 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) [2022-11-03 03:32:36,186 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-11-03 03:32:36,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 03:32:36,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:36,187 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:36,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:36,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 03:32:36,391 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:32:36,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:36,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1624515148, now seen corresponding path program 1 times [2022-11-03 03:32:36,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:36,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259871622] [2022-11-03 03:32:36,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:36,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:37,425 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:37,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:37,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259871622] [2022-11-03 03:32:37,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259871622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:37,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838074490] [2022-11-03 03:32:37,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:37,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:37,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:37,427 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:37,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 03:32:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:37,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-03 03:32:37,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:37,660 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 03:32:37,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 03:32:37,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:32:37,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:37,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 19 [2022-11-03 03:32:38,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:38,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 8 [2022-11-03 03:32:38,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-11-03 03:32:38,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 03:32:38,277 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:38,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:38,398 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1043 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1043) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_main_~len~0#1|)) (forall ((v_ArrVal_1043 (Array Int Int))) (<= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1043) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) is different from false [2022-11-03 03:32:38,414 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4)))) (and (forall ((v_ArrVal_1043 (Array Int Int))) (<= (select (select (store |c_#memory_int| .cse0 v_ArrVal_1043) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_main_~len~0#1|)) (forall ((v_ArrVal_1043 (Array Int Int))) (<= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| .cse0 v_ArrVal_1043) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))))) is different from false [2022-11-03 03:32:38,433 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (and (forall ((v_ArrVal_1043 (Array Int Int))) (<= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| .cse0 v_ArrVal_1043) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (forall ((v_ArrVal_1043 (Array Int Int))) (<= (select (select (store |c_#memory_int| .cse0 v_ArrVal_1043) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_main_~len~0#1|)))) is different from false [2022-11-03 03:32:38,443 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:32:38,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 33 [2022-11-03 03:32:38,455 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:32:38,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 58 treesize of output 61 [2022-11-03 03:32:38,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 21 [2022-11-03 03:32:38,496 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:32:38,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 33 [2022-11-03 03:32:38,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 58 treesize of output 50 [2022-11-03 03:32:38,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 21 [2022-11-03 03:32:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-11-03 03:32:38,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838074490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:38,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1452431927] [2022-11-03 03:32:38,782 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 03:32:38,782 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:32:38,783 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:32:38,783 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:32:38,783 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:32:38,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:38,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:38,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:38,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:32:38,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:32:38,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:38,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:38,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:38,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:32:38,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:38,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:38,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2022-11-03 03:32:38,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:38,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:32:38,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:38,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:38,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:38,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-03 03:32:38,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:38,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:32:38,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:38,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:32:38,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:38,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:39,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:39,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:39,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:39,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-03 03:32:39,115 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:39,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:32:39,164 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:39,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:32:39,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:39,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:39,204 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:32:39,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 278 treesize of output 260 [2022-11-03 03:32:39,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:39,475 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:39,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 562 treesize of output 563 [2022-11-03 03:32:39,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:39,537 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:32:39,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 543 treesize of output 524 [2022-11-03 03:32:39,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:39,595 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:39,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 548 treesize of output 549 [2022-11-03 03:32:39,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:39,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:39,886 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:32:39,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 320 treesize of output 313 [2022-11-03 03:32:39,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:39,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:39,927 INFO L356 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-03 03:32:39,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 362 treesize of output 355 [2022-11-03 03:32:39,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:39,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:39,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:39,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:39,957 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:32:39,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 444 treesize of output 429 [2022-11-03 03:32:40,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:40,109 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:32:40,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 429 treesize of output 432 [2022-11-03 03:32:40,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:40,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:40,282 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:32:40,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 290 treesize of output 272 [2022-11-03 03:32:40,324 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:40,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:32:40,369 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:40,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:32:40,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:40,615 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:40,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 562 treesize of output 563 [2022-11-03 03:32:40,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:40,680 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:32:40,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 543 treesize of output 524 [2022-11-03 03:32:40,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:40,749 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:40,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 548 treesize of output 549 [2022-11-03 03:32:41,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:41,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:41,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:41,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:41,029 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:32:41,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 297 treesize of output 282 [2022-11-03 03:32:41,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:41,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:41,068 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:32:41,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 293 treesize of output 286 [2022-11-03 03:32:41,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:41,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:41,105 INFO L356 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-03 03:32:41,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 359 treesize of output 352 [2022-11-03 03:32:41,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:41,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:41,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:41,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:41,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:41,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:41,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:41,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:41,585 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:32:46,248 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3698#(and (<= (+ |ULTIMATE.start_sll_get_data_at_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_get_data_at_~head#1.base|)) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_sll_get_data_at_~head#1.base|) |ULTIMATE.start_sll_get_data_at_~head#1.offset|) |ULTIMATE.start_sll_get_data_at_#res#1|) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (not (= |ULTIMATE.start_sll_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_get_data_at_~head#1.base|) 1) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_sll_get_data_at_~head#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2022-11-03 03:32:46,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:32:46,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:32:46,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 42 [2022-11-03 03:32:46,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001781950] [2022-11-03 03:32:46,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:32:46,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 03:32:46,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:46,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 03:32:46,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2434, Unknown=3, NotChecked=306, Total=2970 [2022-11-03 03:32:46,250 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 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) [2022-11-03 03:32:47,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:47,559 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2022-11-03 03:32:47,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 03:32:47,560 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 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 26 [2022-11-03 03:32:47,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:47,561 INFO L225 Difference]: With dead ends: 68 [2022-11-03 03:32:47,561 INFO L226 Difference]: Without dead ends: 68 [2022-11-03 03:32:47,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=474, Invalid=4091, Unknown=3, NotChecked=402, Total=4970 [2022-11-03 03:32:47,564 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 148 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:47,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 420 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 651 Invalid, 0 Unknown, 219 Unchecked, 0.5s Time] [2022-11-03 03:32:47,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-03 03:32:47,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2022-11-03 03:32:47,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 56 states have internal predecessors, (67), 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) [2022-11-03 03:32:47,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-11-03 03:32:47,567 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 26 [2022-11-03 03:32:47,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:47,567 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-11-03 03:32:47,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 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) [2022-11-03 03:32:47,568 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-11-03 03:32:47,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 03:32:47,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:47,568 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:47,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:47,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 03:32:47,794 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:32:47,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:47,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1622162611, now seen corresponding path program 1 times [2022-11-03 03:32:47,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:47,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180894718] [2022-11-03 03:32:47,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:47,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:32:47,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:47,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180894718] [2022-11-03 03:32:47,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180894718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:47,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:47,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:32:47,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992636369] [2022-11-03 03:32:47,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:47,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:32:47,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:47,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:32:47,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:32:47,906 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-11-03 03:32:47,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:47,965 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2022-11-03 03:32:47,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:32:47,966 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 26 [2022-11-03 03:32:47,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:47,967 INFO L225 Difference]: With dead ends: 52 [2022-11-03 03:32:47,967 INFO L226 Difference]: Without dead ends: 52 [2022-11-03 03:32:47,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:32:47,968 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:47,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 63 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:32:47,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-03 03:32:47,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-03 03:32:47,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 51 states have internal predecessors, (55), 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) [2022-11-03 03:32:47,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-11-03 03:32:47,971 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 26 [2022-11-03 03:32:47,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:47,972 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-11-03 03:32:47,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-11-03 03:32:47,973 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-11-03 03:32:47,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 03:32:47,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:47,976 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:47,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-03 03:32:47,977 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:32:47,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:47,977 INFO L85 PathProgramCache]: Analyzing trace with hash 96397018, now seen corresponding path program 1 times [2022-11-03 03:32:47,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:47,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127882125] [2022-11-03 03:32:47,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:47,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:32:48,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:48,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127882125] [2022-11-03 03:32:48,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127882125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:48,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9820515] [2022-11-03 03:32:48,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:48,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:48,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:48,106 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:48,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 03:32:48,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:48,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:32:48,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:32:48,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:32:48,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9820515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:48,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1799902078] [2022-11-03 03:32:48,344 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 03:32:48,344 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:32:48,344 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:32:48,345 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:32:48,345 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:32:48,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:48,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:48,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:48,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:48,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:48,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:32:48,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:32:48,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:48,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:32:48,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:48,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:48,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2022-11-03 03:32:48,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:48,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:32:48,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:48,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:48,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:48,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-03 03:32:48,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:48,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:32:48,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:48,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:32:48,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:48,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:48,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:48,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:48,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:48,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-03 03:32:48,661 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:48,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:32:48,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:48,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:48,692 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:32:48,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 284 treesize of output 266 [2022-11-03 03:32:48,740 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:48,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:32:49,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:49,095 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:32:49,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 961 treesize of output 910 [2022-11-03 03:32:49,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:49,168 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:49,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 958 treesize of output 953 [2022-11-03 03:32:49,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:49,231 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:49,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 946 treesize of output 941 [2022-11-03 03:32:49,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:49,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:49,723 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:32:49,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 303 treesize of output 296 [2022-11-03 03:32:49,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:49,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:49,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:49,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:49,753 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:32:49,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 373 treesize of output 358 [2022-11-03 03:32:49,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:49,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:49,791 INFO L356 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-03 03:32:49,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 369 treesize of output 362 [2022-11-03 03:32:49,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:49,932 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:32:49,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 388 treesize of output 391 [2022-11-03 03:32:50,109 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:50,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:32:50,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:50,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:50,143 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:32:50,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 284 treesize of output 266 [2022-11-03 03:32:50,200 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:50,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:32:50,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:50,497 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:50,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 714 treesize of output 709 [2022-11-03 03:32:50,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:50,565 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:32:50,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 689 treesize of output 658 [2022-11-03 03:32:50,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:50,633 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:50,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 690 treesize of output 691 [2022-11-03 03:32:50,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:50,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:50,977 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:32:50,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 320 treesize of output 313 [2022-11-03 03:32:50,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:50,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:51,016 INFO L356 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-03 03:32:51,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 398 treesize of output 391 [2022-11-03 03:32:51,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:51,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:51,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:51,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:51,053 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:32:51,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 444 treesize of output 429 [2022-11-03 03:32:51,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:51,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:51,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:51,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:51,394 INFO L356 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-03 03:32:51,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 150 treesize of output 148 [2022-11-03 03:32:51,432 INFO L356 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-03 03:32:51,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 144 treesize of output 142 [2022-11-03 03:32:51,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:51,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:51,737 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:32:57,032 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4161#(and (<= (+ |ULTIMATE.start_sll_get_data_at_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_get_data_at_~head#1.base|)) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_sll_get_data_at_~head#1.base|) |ULTIMATE.start_sll_get_data_at_~head#1.offset|) |ULTIMATE.start_sll_get_data_at_#res#1|) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (not (= |ULTIMATE.start_sll_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_get_data_at_~head#1.base|) 1) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_sll_get_data_at_~head#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2022-11-03 03:32:57,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:32:57,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:32:57,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-11-03 03:32:57,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140031270] [2022-11-03 03:32:57,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:32:57,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:32:57,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:57,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:32:57,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:32:57,033 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 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) [2022-11-03 03:32:57,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:57,117 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2022-11-03 03:32:57,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:32:57,118 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 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 30 [2022-11-03 03:32:57,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:57,118 INFO L225 Difference]: With dead ends: 51 [2022-11-03 03:32:57,118 INFO L226 Difference]: Without dead ends: 51 [2022-11-03 03:32:57,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:32:57,119 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:57,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 58 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:32:57,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-03 03:32:57,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-03 03:32:57,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.325) internal successors, (53), 50 states have internal predecessors, (53), 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) [2022-11-03 03:32:57,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2022-11-03 03:32:57,121 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 30 [2022-11-03 03:32:57,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:57,122 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2022-11-03 03:32:57,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 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) [2022-11-03 03:32:57,122 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2022-11-03 03:32:57,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 03:32:57,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:57,122 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:57,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:57,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:57,335 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:32:57,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:57,335 INFO L85 PathProgramCache]: Analyzing trace with hash 94044481, now seen corresponding path program 1 times [2022-11-03 03:32:57,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:57,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380599794] [2022-11-03 03:32:57,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:57,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:58,792 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:58,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:58,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380599794] [2022-11-03 03:32:58,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380599794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:58,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349127219] [2022-11-03 03:32:58,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:58,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:58,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:58,794 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:58,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 03:32:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:58,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-03 03:32:58,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:58,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:59,080 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 03:32:59,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 03:32:59,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:32:59,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:59,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 21 [2022-11-03 03:32:59,367 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:32:59,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-11-03 03:32:59,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-11-03 03:32:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:32:59,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:59,585 INFO L356 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2022-11-03 03:32:59,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 20 [2022-11-03 03:32:59,589 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1309 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1309) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_sll_update_at_~head#1.base|)) is different from false [2022-11-03 03:32:59,598 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1309 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4)))) (= .cse0 (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1309) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))))) is different from false [2022-11-03 03:32:59,605 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1309 (Array Int Int))) (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1309) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1) .cse0)))) is different from false [2022-11-03 03:32:59,611 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1307 Int) (v_ArrVal_1309 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_1307))) (.cse2 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~s~0#1.base|) .cse2))) (= .cse0 (select (select (store .cse1 .cse0 v_ArrVal_1309) |c_ULTIMATE.start_main_~s~0#1.base|) .cse2))))) is different from false [2022-11-03 03:32:59,630 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_67| Int) (v_ArrVal_1307 Int) (v_ArrVal_1309 (Array Int Int))) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_67|) (let ((.cse1 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_67| v_ArrVal_1307)) (.cse2 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse0 (select .cse1 .cse2))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse1) .cse0 v_ArrVal_1309) |c_ULTIMATE.start_main_~s~0#1.base|) .cse2)))))) is different from false [2022-11-03 03:32:59,643 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_67| Int) (v_ArrVal_1307 Int) (v_ArrVal_1309 (Array Int Int))) (or (let ((.cse1 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_67| v_ArrVal_1307)) (.cse2 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (let ((.cse0 (select .cse1 .cse2))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse1) .cse0 v_ArrVal_1309) |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse2)))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_67|))) is different from false [2022-11-03 03:32:59,655 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:32:59,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 51 [2022-11-03 03:32:59,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:59,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:59,667 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:32:59,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 27 treesize of output 31 [2022-11-03 03:32:59,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2022-11-03 03:32:59,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 8 not checked. [2022-11-03 03:32:59,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349127219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:59,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [931433589] [2022-11-03 03:32:59,812 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 03:32:59,812 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:32:59,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:32:59,813 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:32:59,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:32:59,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:59,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:59,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:59,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:59,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:59,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:32:59,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:32:59,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:59,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:32:59,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:59,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:32:59,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:59,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:59,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2022-11-03 03:32:59,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:59,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:59,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:59,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-03 03:32:59,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:59,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:32:59,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:59,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:33:00,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:00,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:00,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:00,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:00,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:00,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-03 03:33:00,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:00,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:00,086 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:33:00,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 290 treesize of output 272 [2022-11-03 03:33:00,133 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:00,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:33:00,182 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:00,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:33:00,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:00,402 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:00,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 562 treesize of output 563 [2022-11-03 03:33:00,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:00,457 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:33:00,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 543 treesize of output 524 [2022-11-03 03:33:00,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:00,534 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:00,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 548 treesize of output 549 [2022-11-03 03:33:00,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:00,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:01,012 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:33:01,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 293 treesize of output 286 [2022-11-03 03:33:01,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:01,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:01,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:01,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:01,044 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:33:01,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 363 treesize of output 348 [2022-11-03 03:33:01,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:01,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:01,080 INFO L356 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-03 03:33:01,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 359 treesize of output 352 [2022-11-03 03:33:01,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:01,257 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:33:01,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 360 treesize of output 363 [2022-11-03 03:33:01,448 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:01,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:33:01,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:01,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:01,475 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:33:01,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 284 treesize of output 266 [2022-11-03 03:33:01,524 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:01,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:33:01,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:01,774 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:01,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 562 treesize of output 563 [2022-11-03 03:33:01,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:01,832 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:01,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 556 treesize of output 557 [2022-11-03 03:33:01,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:01,897 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:33:01,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 537 treesize of output 518 [2022-11-03 03:33:02,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:02,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:02,271 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:33:02,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 315 treesize of output 308 [2022-11-03 03:33:02,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:02,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:02,310 INFO L356 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-03 03:33:02,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 351 treesize of output 344 [2022-11-03 03:33:02,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:02,338 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:33:02,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 433 treesize of output 418 [2022-11-03 03:33:02,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:02,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:02,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:02,732 INFO L356 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-03 03:33:02,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 148 treesize of output 146 [2022-11-03 03:33:02,773 INFO L356 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-03 03:33:02,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 142 treesize of output 140 [2022-11-03 03:33:02,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:03,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:03,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:03,412 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:33:09,229 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4496#(and (<= |ULTIMATE.start_sll_get_data_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= |ULTIMATE.start_main_~expected~0#1| 4) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 2) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 0 |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_sll_get_data_at_#in~index#1| 2) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (not (= (select |#valid| |ULTIMATE.start_sll_get_data_at_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 2 |ULTIMATE.start_main_~expected~0#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~index#1|) (<= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 03:33:09,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:33:09,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:33:09,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 15] total 42 [2022-11-03 03:33:09,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066657338] [2022-11-03 03:33:09,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:33:09,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-03 03:33:09,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:09,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-03 03:33:09,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2364, Unknown=6, NotChecked=618, Total=3192 [2022-11-03 03:33:09,231 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 43 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 43 states have internal predecessors, (81), 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) [2022-11-03 03:33:09,603 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (.cse2 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_67| Int) (v_ArrVal_1307 Int) (v_ArrVal_1309 (Array Int Int))) (or (let ((.cse1 (store .cse3 |v_ULTIMATE.start_sll_update_at_~head#1.offset_67| v_ArrVal_1307))) (let ((.cse0 (select .cse1 .cse2))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse1) .cse0 v_ArrVal_1309) |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse2)))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_67|))) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| |c_ULTIMATE.start_node_create_~temp~0#1.offset|) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (= (select |c_#valid| |c_ULTIMATE.start_node_create_~temp~0#1.base|) 1) (not (= (select .cse3 .cse2) |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 1))) is different from false [2022-11-03 03:33:09,607 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) (.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|))) (and (= |c_ULTIMATE.start_main_~s~0#1.offset| (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (= |c_ULTIMATE.start_main_~i~0#1| 0) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select .cse0 .cse1))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_67| Int) (v_ArrVal_1307 Int) (v_ArrVal_1309 (Array Int Int))) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_67|) (let ((.cse3 (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_67| v_ArrVal_1307))) (let ((.cse2 (select .cse3 .cse1))) (= .cse2 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse3) .cse2 v_ArrVal_1309) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)))))))) is different from false [2022-11-03 03:33:10,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:10,885 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2022-11-03 03:33:10,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 03:33:10,885 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 43 states have internal predecessors, (81), 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 30 [2022-11-03 03:33:10,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:10,886 INFO L225 Difference]: With dead ends: 72 [2022-11-03 03:33:10,886 INFO L226 Difference]: Without dead ends: 72 [2022-11-03 03:33:10,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=464, Invalid=4252, Unknown=8, NotChecked=1128, Total=5852 [2022-11-03 03:33:10,889 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 380 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:10,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 270 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 845 Invalid, 0 Unknown, 311 Unchecked, 0.6s Time] [2022-11-03 03:33:10,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-03 03:33:10,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2022-11-03 03:33:10,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.372093023255814) internal successors, (59), 53 states have internal predecessors, (59), 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) [2022-11-03 03:33:10,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2022-11-03 03:33:10,891 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 30 [2022-11-03 03:33:10,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:10,892 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2022-11-03 03:33:10,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 43 states have internal predecessors, (81), 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) [2022-11-03 03:33:10,892 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2022-11-03 03:33:10,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 03:33:10,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:10,893 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:10,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:11,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:11,115 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:33:11,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:11,115 INFO L85 PathProgramCache]: Analyzing trace with hash 94044482, now seen corresponding path program 1 times [2022-11-03 03:33:11,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:11,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593460225] [2022-11-03 03:33:11,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:11,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:12,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:12,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593460225] [2022-11-03 03:33:12,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593460225] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:12,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644062865] [2022-11-03 03:33:12,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:12,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:12,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:12,995 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:13,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 03:33:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:13,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-03 03:33:13,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:13,231 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 03:33:13,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 03:33:13,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:33:13,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:13,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 21 [2022-11-03 03:33:13,577 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:33:13,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 53 [2022-11-03 03:33:13,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:33:13,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2022-11-03 03:33:13,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2022-11-03 03:33:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:33:13,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:13,997 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:33:13,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 51 [2022-11-03 03:33:14,144 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:33:14,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 128 treesize of output 109 [2022-11-03 03:33:14,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 93 treesize of output 89 [2022-11-03 03:33:14,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 89 treesize of output 85 [2022-11-03 03:33:14,798 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_76| Int) (v_ArrVal_1416 Int)) (or (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_76| v_ArrVal_1416) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_main_~s~0#1.base|)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_76|))) is different from false [2022-11-03 03:33:15,235 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_76| Int) (v_ArrVal_1416 Int)) (or (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_76| v_ArrVal_1416) (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_76|))) is different from false [2022-11-03 03:33:15,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-03 03:33:15,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2022-11-03 03:33:15,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644062865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:33:15,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [181213658] [2022-11-03 03:33:15,303 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 03:33:15,303 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:33:15,304 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:33:15,304 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:33:15,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:33:15,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:15,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:15,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:15,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:15,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:15,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:33:15,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:33:15,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:15,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:15,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2022-11-03 03:33:15,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:15,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:33:15,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:15,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:33:15,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:15,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:33:15,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:15,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:15,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:15,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-03 03:33:15,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:15,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:33:15,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:15,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:15,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:15,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:15,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:15,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-03 03:33:15,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:15,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:15,573 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:33:15,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 290 treesize of output 272 [2022-11-03 03:33:15,622 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:15,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:33:15,673 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:15,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:33:15,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:15,913 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:15,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 562 treesize of output 563 [2022-11-03 03:33:15,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:15,967 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:33:15,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 543 treesize of output 524 [2022-11-03 03:33:15,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,027 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:16,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 548 treesize of output 549 [2022-11-03 03:33:16,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:16,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:16,318 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:33:16,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 320 treesize of output 313 [2022-11-03 03:33:16,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:16,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:16,364 INFO L356 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-03 03:33:16,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 398 treesize of output 391 [2022-11-03 03:33:16,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:16,400 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:33:16,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 444 treesize of output 429 [2022-11-03 03:33:16,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,565 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:33:16,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 429 treesize of output 432 [2022-11-03 03:33:16,743 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:16,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:33:16,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,769 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:33:16,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 284 treesize of output 266 [2022-11-03 03:33:16,814 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:16,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:33:16,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,972 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:16,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2022-11-03 03:33:16,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:17,022 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:33:17,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 292 treesize of output 293 [2022-11-03 03:33:17,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,074 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:17,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 302 [2022-11-03 03:33:17,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:17,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:17,296 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:33:17,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 322 treesize of output 315 [2022-11-03 03:33:17,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:17,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:17,336 INFO L356 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-03 03:33:17,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 364 treesize of output 357 [2022-11-03 03:33:17,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:17,364 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:33:17,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 452 treesize of output 437 [2022-11-03 03:33:17,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:17,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:17,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:17,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:17,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:17,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:18,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:18,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:18,017 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:33:22,540 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4892#(and (<= |ULTIMATE.start_sll_get_data_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= |ULTIMATE.start_main_~expected~0#1| 4) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (or (not (<= 0 |ULTIMATE.start_sll_get_data_at_~head#1.offset|)) (not (<= (+ |ULTIMATE.start_sll_get_data_at_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_get_data_at_~head#1.base|)))) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 2) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 0 |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_sll_get_data_at_#in~index#1| 2) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 2 |ULTIMATE.start_main_~expected~0#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~index#1|) (<= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 03:33:22,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:33:22,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:33:22,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 13] total 38 [2022-11-03 03:33:22,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238907210] [2022-11-03 03:33:22,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:33:22,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 03:33:22,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:22,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 03:33:22,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2362, Unknown=2, NotChecked=198, Total=2756 [2022-11-03 03:33:22,543 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 39 states, 38 states have (on average 2.026315789473684) internal successors, (77), 39 states have internal predecessors, (77), 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) [2022-11-03 03:33:23,473 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 4 |c_ULTIMATE.start_node_create_~temp~0#1.offset|)) (.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (.cse2 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (and (not (= |c_ULTIMATE.start_node_create_~temp~0#1.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base|) .cse0))) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| |c_ULTIMATE.start_node_create_~temp~0#1.offset|) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base|) .cse0) |c_ULTIMATE.start_node_create_~temp~0#1.offset|) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_76| Int) (v_ArrVal_1416 Int)) (or (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| (select (store .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_76| v_ArrVal_1416) .cse2))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_76|))) (not (= (select .cse1 .cse2) |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (not (= |c_ULTIMATE.start_node_create_~temp~0#1.base| 0)) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0))) is different from false [2022-11-03 03:33:23,884 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_76| Int) (v_ArrVal_1416 Int)) (or (not (= (select (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_76| v_ArrVal_1416) .cse1) |c_ULTIMATE.start_main_~s~0#1.base|)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_76|))) (= |c_ULTIMATE.start_main_~s~0#1.offset| (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (= |c_ULTIMATE.start_main_~i~0#1| 0) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select .cse0 .cse1))))) is different from false [2022-11-03 03:33:25,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:25,106 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2022-11-03 03:33:25,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 03:33:25,109 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.026315789473684) internal successors, (77), 39 states have internal predecessors, (77), 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 30 [2022-11-03 03:33:25,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:25,110 INFO L225 Difference]: With dead ends: 75 [2022-11-03 03:33:25,110 INFO L226 Difference]: Without dead ends: 75 [2022-11-03 03:33:25,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=483, Invalid=4641, Unknown=4, NotChecked=572, Total=5700 [2022-11-03 03:33:25,113 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 206 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:25,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 337 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 729 Invalid, 0 Unknown, 223 Unchecked, 0.6s Time] [2022-11-03 03:33:25,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-03 03:33:25,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2022-11-03 03:33:25,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 53 states have internal predecessors, (58), 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) [2022-11-03 03:33:25,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2022-11-03 03:33:25,120 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 30 [2022-11-03 03:33:25,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:25,120 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2022-11-03 03:33:25,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.026315789473684) internal successors, (77), 39 states have internal predecessors, (77), 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) [2022-11-03 03:33:25,120 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2022-11-03 03:33:25,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 03:33:25,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:25,121 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:25,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-03 03:33:25,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:25,327 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:33:25,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:25,327 INFO L85 PathProgramCache]: Analyzing trace with hash 94042026, now seen corresponding path program 1 times [2022-11-03 03:33:25,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:25,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724975352] [2022-11-03 03:33:25,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:25,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:25,428 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:33:25,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:25,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724975352] [2022-11-03 03:33:25,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724975352] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:25,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234000548] [2022-11-03 03:33:25,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:25,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:25,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:25,431 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:25,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 03:33:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:25,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:33:25,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:33:25,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:33:25,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234000548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:33:25,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [654037932] [2022-11-03 03:33:25,692 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 03:33:25,692 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:33:25,693 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:33:25,693 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:33:25,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:33:25,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:25,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:25,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:25,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:25,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:25,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:33:25,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:33:25,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:25,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:33:25,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:25,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:25,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2022-11-03 03:33:25,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:25,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:33:25,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:25,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:25,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:25,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-03 03:33:25,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:25,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:33:25,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:25,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:33:25,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:25,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:25,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:25,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:25,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:25,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-03 03:33:26,004 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:26,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:33:26,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:26,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:26,031 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:33:26,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 291 treesize of output 273 [2022-11-03 03:33:26,082 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:26,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:33:26,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:26,397 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:26,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 576 treesize of output 577 [2022-11-03 03:33:26,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:26,461 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:26,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 570 treesize of output 571 [2022-11-03 03:33:26,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:26,524 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:33:26,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 551 treesize of output 532 [2022-11-03 03:33:26,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:26,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:26,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:26,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:26,856 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:33:26,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 297 treesize of output 282 [2022-11-03 03:33:26,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:26,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:26,892 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:33:26,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 293 treesize of output 286 [2022-11-03 03:33:26,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:26,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:26,928 INFO L356 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-03 03:33:26,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 359 treesize of output 352 [2022-11-03 03:33:27,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:27,083 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:33:27,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 360 treesize of output 363 [2022-11-03 03:33:27,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:27,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:27,266 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:33:27,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 297 treesize of output 279 [2022-11-03 03:33:27,314 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:27,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:33:27,365 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:27,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:33:27,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:27,549 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:27,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 319 [2022-11-03 03:33:27,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:27,600 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:33:27,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 299 treesize of output 300 [2022-11-03 03:33:27,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:27,654 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:27,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 308 treesize of output 309 [2022-11-03 03:33:27,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:27,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:27,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:27,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:27,862 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:33:27,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 305 treesize of output 290 [2022-11-03 03:33:27,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:27,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:27,899 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:33:27,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 301 treesize of output 294 [2022-11-03 03:33:27,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:27,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:27,932 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:33:27,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 313 treesize of output 306 [2022-11-03 03:33:28,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:28,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:28,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:28,244 INFO L356 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-03 03:33:28,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 150 treesize of output 148 [2022-11-03 03:33:28,278 INFO L356 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-03 03:33:28,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 144 treesize of output 142 [2022-11-03 03:33:28,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:28,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:28,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:28,920 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:33:33,319 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5266#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~len~0#1| 2) (not (<= (+ |ULTIMATE.start_sll_get_data_at_~head#1.offset| 8) (select |#length| |ULTIMATE.start_sll_get_data_at_~head#1.base|))) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (< 0 |ULTIMATE.start_sll_get_data_at_~index#1|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_sll_get_data_at_~head#1.base|) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 03:33:33,319 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:33:33,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:33:33,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-11-03 03:33:33,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416104251] [2022-11-03 03:33:33,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:33:33,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:33:33,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:33,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:33:33,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:33:33,322 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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) [2022-11-03 03:33:33,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:33,419 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-11-03 03:33:33,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:33:33,419 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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 30 [2022-11-03 03:33:33,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:33,420 INFO L225 Difference]: With dead ends: 46 [2022-11-03 03:33:33,420 INFO L226 Difference]: Without dead ends: 46 [2022-11-03 03:33:33,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:33:33,421 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 33 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:33,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 56 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:33:33,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-03 03:33:33,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-03 03:33:33,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.205128205128205) internal successors, (47), 45 states have internal predecessors, (47), 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) [2022-11-03 03:33:33,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-11-03 03:33:33,424 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 30 [2022-11-03 03:33:33,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:33,424 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-11-03 03:33:33,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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) [2022-11-03 03:33:33,425 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-11-03 03:33:33,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 03:33:33,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:33,425 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:33,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-03 03:33:33,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:33,630 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:33:33,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:33,631 INFO L85 PathProgramCache]: Analyzing trace with hash 182493149, now seen corresponding path program 1 times [2022-11-03 03:33:33,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:33,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824384017] [2022-11-03 03:33:33,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:33,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:35,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:35,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824384017] [2022-11-03 03:33:35,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824384017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:35,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476168068] [2022-11-03 03:33:35,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:35,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:35,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:35,268 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:35,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 03:33:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:35,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-03 03:33:35,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:35,535 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 03:33:35,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 03:33:35,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:33:35,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:35,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 21 [2022-11-03 03:33:35,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-11-03 03:33:35,953 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:33:35,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 63 [2022-11-03 03:33:35,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 21 [2022-11-03 03:33:35,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 36 [2022-11-03 03:33:36,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2022-11-03 03:33:36,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 23 treesize of output 11 [2022-11-03 03:33:36,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 03:33:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:36,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:36,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 64 [2022-11-03 03:33:36,694 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (= |c_ULTIMATE.start_sll_update_at_~data#1| (+ |c_ULTIMATE.start_main_~len~0#1| 1)) (forall ((v_ArrVal_1636 (Array Int Int))) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1636) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0))) (forall ((v_ArrVal_1634 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1634) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0) |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))) is different from false [2022-11-03 03:33:36,715 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse0)) (.cse2 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (= |c_ULTIMATE.start_sll_update_at_~data#1| (+ |c_ULTIMATE.start_main_~len~0#1| 1)) (forall ((v_ArrVal_1634 (Array Int Int))) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse0) (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_1634) |c_ULTIMATE.start_main_~s~0#1.base|) .cse2))) (forall ((v_ArrVal_1636 (Array Int Int))) (= .cse1 (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_1636) |c_ULTIMATE.start_main_~s~0#1.base|) .cse2)))))) is different from false [2022-11-03 03:33:36,735 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (and (forall ((v_ArrVal_1636 (Array Int Int))) (= .cse0 (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1636) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (forall ((v_ArrVal_1634 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1634) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (= |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2022-11-03 03:33:36,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 198 treesize of output 174 [2022-11-03 03:33:36,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 165 treesize of output 149 [2022-11-03 03:33:36,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 133 [2022-11-03 03:33:36,801 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) (.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|))) (and (= |c_ULTIMATE.start_main_~i~0#1| 0) (forall ((v_ArrVal_1631 Int)) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store .cse0 |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_1631)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)))) (forall ((v_ArrVal_1636 (Array Int Int)) (v_ArrVal_1631 Int)) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store .cse0 |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_1631)))) (let ((.cse2 (select (select .cse3 |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (= .cse2 (select (select (store .cse3 .cse2 v_ArrVal_1636) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))))))) is different from false [2022-11-03 03:33:38,835 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse2 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_90| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_90|) (forall ((v_ArrVal_1636 (Array Int Int)) (v_ArrVal_1631 Int)) (let ((.cse0 (store .cse3 |v_ULTIMATE.start_sll_update_at_~head#1.offset_90| v_ArrVal_1631))) (let ((.cse1 (select .cse0 .cse2))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse0) .cse1 v_ArrVal_1636) |c_ULTIMATE.start_main_~s~0#1.base|) .cse2) .cse1)))))) (= |c_ULTIMATE.start_main_~i~0#1| 0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_90| Int)) (or (forall ((v_ArrVal_1631 Int)) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (store .cse3 |v_ULTIMATE.start_sll_update_at_~head#1.offset_90| v_ArrVal_1631) .cse2)))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_90|))))) is different from false [2022-11-03 03:33:40,875 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_90| Int)) (or (forall ((v_ArrVal_1631 Int)) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| (select (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_90| v_ArrVal_1631) .cse1)))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_90|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_90| Int)) (or (forall ((v_ArrVal_1636 (Array Int Int)) (v_ArrVal_1631 Int)) (let ((.cse2 (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_90| v_ArrVal_1631))) (let ((.cse3 (select .cse2 .cse1))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse2) .cse3 v_ArrVal_1636) |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse1) .cse3)))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_90|))))) is different from false [2022-11-03 03:33:40,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-03 03:33:40,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:40,896 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-03 03:33:40,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 1 [2022-11-03 03:33:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-03 03:33:40,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476168068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:33:40,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1796995846] [2022-11-03 03:33:40,991 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 03:33:40,992 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:33:40,992 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:33:40,992 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:33:40,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:33:41,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:41,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:41,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:41,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:41,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:41,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:33:41,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:33:41,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:41,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:33:41,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:41,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:41,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2022-11-03 03:33:41,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:41,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:33:41,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:41,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:33:41,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:41,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:33:41,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:41,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:41,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:41,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-03 03:33:41,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:41,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:41,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:41,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:41,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:41,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-03 03:33:41,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:41,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:41,295 INFO L356 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-03 03:33:41,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 297 treesize of output 289 [2022-11-03 03:33:41,341 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:41,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 287 treesize of output 294 [2022-11-03 03:33:41,387 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:41,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 281 treesize of output 288 [2022-11-03 03:33:41,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:41,735 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:41,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 597 treesize of output 592 [2022-11-03 03:33:41,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:41,821 INFO L356 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-03 03:33:41,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 572 treesize of output 561 [2022-11-03 03:33:41,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:41,882 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:41,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 581 treesize of output 576 [2022-11-03 03:33:42,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:42,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:42,342 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:33:42,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 325 treesize of output 318 [2022-11-03 03:33:42,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:42,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:42,382 INFO L356 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-03 03:33:42,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 409 treesize of output 402 [2022-11-03 03:33:42,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:42,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:42,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:42,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:42,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:42,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:42,417 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:33:42,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 467 treesize of output 452 [2022-11-03 03:33:42,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:42,605 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:33:42,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 452 treesize of output 447 [2022-11-03 03:33:42,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:42,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:42,800 INFO L356 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-03 03:33:42,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 297 treesize of output 289 [2022-11-03 03:33:42,848 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:42,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 287 treesize of output 294 [2022-11-03 03:33:42,895 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:42,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 281 treesize of output 288 [2022-11-03 03:33:43,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:43,273 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:43,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 597 treesize of output 592 [2022-11-03 03:33:43,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:43,349 INFO L356 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-03 03:33:43,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 572 treesize of output 561 [2022-11-03 03:33:43,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:43,413 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:43,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 581 treesize of output 576 [2022-11-03 03:33:43,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:43,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:43,852 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:33:43,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 325 treesize of output 318 [2022-11-03 03:33:43,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:43,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:43,892 INFO L356 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-03 03:33:43,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 409 treesize of output 402 [2022-11-03 03:33:43,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:43,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:43,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:43,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:43,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:43,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:43,925 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:33:43,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 467 treesize of output 452 [2022-11-03 03:33:44,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:44,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:44,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:44,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:44,278 INFO L356 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-03 03:33:44,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 148 treesize of output 146 [2022-11-03 03:33:44,314 INFO L356 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-03 03:33:44,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 142 treesize of output 140 [2022-11-03 03:33:44,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:44,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:44,883 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:33:51,268 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5611#(and (<= |ULTIMATE.start_sll_get_data_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (<= 2 |ULTIMATE.start_main_~expected~0#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~index#1|) (<= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2022-11-03 03:33:51,268 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:33:51,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:33:51,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 47 [2022-11-03 03:33:51,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452666646] [2022-11-03 03:33:51,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:33:51,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-03 03:33:51,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:51,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-03 03:33:51,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2782, Unknown=6, NotChecked=666, Total=3660 [2022-11-03 03:33:51,270 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 47 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 47 states have internal predecessors, (84), 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) [2022-11-03 03:33:53,763 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (.cse1 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (and (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_90| Int)) (or (forall ((v_ArrVal_1631 Int)) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| (select (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_90| v_ArrVal_1631) .cse1)))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_90|))) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| |c_ULTIMATE.start_node_create_~temp~0#1.offset|) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_90| Int)) (or (forall ((v_ArrVal_1636 (Array Int Int)) (v_ArrVal_1631 Int)) (let ((.cse2 (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_90| v_ArrVal_1631))) (let ((.cse3 (select .cse2 .cse1))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse2) .cse3 v_ArrVal_1636) |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse1) .cse3)))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_90|))) (not (= (select .cse0 .cse1) |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0))) is different from false [2022-11-03 03:33:53,767 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse2 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_90| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_90|) (forall ((v_ArrVal_1636 (Array Int Int)) (v_ArrVal_1631 Int)) (let ((.cse0 (store .cse3 |v_ULTIMATE.start_sll_update_at_~head#1.offset_90| v_ArrVal_1631))) (let ((.cse1 (select .cse0 .cse2))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse0) .cse1 v_ArrVal_1636) |c_ULTIMATE.start_main_~s~0#1.base|) .cse2) .cse1)))))) (= |c_ULTIMATE.start_main_~s~0#1.offset| (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (= |c_ULTIMATE.start_main_~i~0#1| 0) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_90| Int)) (or (forall ((v_ArrVal_1631 Int)) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (store .cse3 |v_ULTIMATE.start_sll_update_at_~head#1.offset_90| v_ArrVal_1631) .cse2)))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_90|))) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select .cse3 .cse2))))) is different from false [2022-11-03 03:33:55,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:55,410 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2022-11-03 03:33:55,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 03:33:55,411 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 47 states have internal predecessors, (84), 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 32 [2022-11-03 03:33:55,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:55,411 INFO L225 Difference]: With dead ends: 48 [2022-11-03 03:33:55,411 INFO L226 Difference]: Without dead ends: 48 [2022-11-03 03:33:55,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=430, Invalid=5143, Unknown=9, NotChecked=1224, Total=6806 [2022-11-03 03:33:55,415 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 117 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:55,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 327 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 663 Invalid, 0 Unknown, 254 Unchecked, 0.6s Time] [2022-11-03 03:33:55,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-03 03:33:55,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2022-11-03 03:33:55,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 43 states have internal predecessors, (45), 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) [2022-11-03 03:33:55,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2022-11-03 03:33:55,416 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 32 [2022-11-03 03:33:55,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:55,417 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2022-11-03 03:33:55,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 47 states have internal predecessors, (84), 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) [2022-11-03 03:33:55,417 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2022-11-03 03:33:55,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 03:33:55,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:55,418 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:55,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:55,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-03 03:33:55,618 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:33:55,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:55,619 INFO L85 PathProgramCache]: Analyzing trace with hash -716343372, now seen corresponding path program 1 times [2022-11-03 03:33:55,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:55,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99177332] [2022-11-03 03:33:55,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:55,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:33:55,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:55,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99177332] [2022-11-03 03:33:55,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99177332] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:55,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:55,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:33:55,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244946606] [2022-11-03 03:33:55,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:55,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:33:55,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:55,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:33:55,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:33:55,739 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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) [2022-11-03 03:33:55,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:55,865 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2022-11-03 03:33:55,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:33:55,865 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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 34 [2022-11-03 03:33:55,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:55,866 INFO L225 Difference]: With dead ends: 53 [2022-11-03 03:33:55,866 INFO L226 Difference]: Without dead ends: 53 [2022-11-03 03:33:55,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:33:55,866 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 145 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:55,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 18 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:33:55,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-03 03:33:55,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2022-11-03 03:33:55,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 44 states have internal predecessors, (46), 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) [2022-11-03 03:33:55,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-11-03 03:33:55,868 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 34 [2022-11-03 03:33:55,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:55,868 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-11-03 03:33:55,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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) [2022-11-03 03:33:55,868 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-11-03 03:33:55,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 03:33:55,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:55,869 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:55,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-03 03:33:55,869 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:33:55,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:55,869 INFO L85 PathProgramCache]: Analyzing trace with hash -716344598, now seen corresponding path program 1 times [2022-11-03 03:33:55,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:55,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532058377] [2022-11-03 03:33:55,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:55,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:33:55,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:55,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532058377] [2022-11-03 03:33:55,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532058377] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:55,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503149192] [2022-11-03 03:33:55,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:55,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:55,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:55,964 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:55,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 03:33:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:56,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:33:56,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:56,247 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:33:56,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:56,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503149192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:56,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:33:56,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-03 03:33:56,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793076202] [2022-11-03 03:33:56,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:56,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:33:56,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:56,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:33:56,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:33:56,251 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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) [2022-11-03 03:33:56,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:56,353 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2022-11-03 03:33:56,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:33:56,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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 34 [2022-11-03 03:33:56,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:56,354 INFO L225 Difference]: With dead ends: 51 [2022-11-03 03:33:56,354 INFO L226 Difference]: Without dead ends: 51 [2022-11-03 03:33:56,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:33:56,354 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:56,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 25 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:33:56,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-03 03:33:56,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2022-11-03 03:33:56,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.175) internal successors, (47), 44 states have internal predecessors, (47), 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) [2022-11-03 03:33:56,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-11-03 03:33:56,356 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 34 [2022-11-03 03:33:56,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:56,357 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-11-03 03:33:56,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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) [2022-11-03 03:33:56,357 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-11-03 03:33:56,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 03:33:56,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:56,357 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:56,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:56,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-03 03:33:56,566 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:33:56,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:56,567 INFO L85 PathProgramCache]: Analyzing trace with hash -716344597, now seen corresponding path program 1 times [2022-11-03 03:33:56,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:56,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869144390] [2022-11-03 03:33:56,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:56,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:33:56,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:56,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869144390] [2022-11-03 03:33:56,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869144390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:56,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:56,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:33:56,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630285049] [2022-11-03 03:33:56,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:56,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:33:56,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:56,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:33:56,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:33:56,814 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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) [2022-11-03 03:33:56,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:56,997 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2022-11-03 03:33:56,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:33:56,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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 34 [2022-11-03 03:33:56,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:56,998 INFO L225 Difference]: With dead ends: 49 [2022-11-03 03:33:56,998 INFO L226 Difference]: Without dead ends: 49 [2022-11-03 03:33:56,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:33:56,998 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 118 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:56,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 9 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:33:56,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-03 03:33:57,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-11-03 03:33:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.146341463414634) internal successors, (47), 45 states have internal predecessors, (47), 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) [2022-11-03 03:33:57,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-11-03 03:33:57,000 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 34 [2022-11-03 03:33:57,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:57,001 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-11-03 03:33:57,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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) [2022-11-03 03:33:57,001 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-11-03 03:33:57,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:33:57,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:57,001 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:57,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-03 03:33:57,002 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:33:57,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:57,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1212364125, now seen corresponding path program 1 times [2022-11-03 03:33:57,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:57,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262199874] [2022-11-03 03:33:57,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:57,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:33:57,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:57,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262199874] [2022-11-03 03:33:57,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262199874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:57,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:57,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:33:57,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746477583] [2022-11-03 03:33:57,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:57,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:33:57,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:57,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:33:57,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:33:57,142 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 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) [2022-11-03 03:33:57,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:57,277 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2022-11-03 03:33:57,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:33:57,277 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 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 36 [2022-11-03 03:33:57,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:57,278 INFO L225 Difference]: With dead ends: 47 [2022-11-03 03:33:57,278 INFO L226 Difference]: Without dead ends: 47 [2022-11-03 03:33:57,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:33:57,278 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 107 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:57,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 12 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:33:57,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-03 03:33:57,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-03 03:33:57,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 46 states have internal predecessors, (48), 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) [2022-11-03 03:33:57,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-11-03 03:33:57,280 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 36 [2022-11-03 03:33:57,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:57,280 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-11-03 03:33:57,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 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) [2022-11-03 03:33:57,281 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-11-03 03:33:57,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 03:33:57,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:57,281 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:57,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-03 03:33:57,281 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:33:57,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:57,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1159493043, now seen corresponding path program 1 times [2022-11-03 03:33:57,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:57,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837720431] [2022-11-03 03:33:57,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:57,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:33:58,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:58,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837720431] [2022-11-03 03:33:58,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837720431] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:58,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741972247] [2022-11-03 03:33:58,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:58,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:58,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:58,808 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:58,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 03:33:59,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:59,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-03 03:33:59,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:59,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:33:59,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:59,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 54 treesize of output 41 [2022-11-03 03:33:59,845 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:33:59,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 54 [2022-11-03 03:33:59,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 40 treesize of output 30 [2022-11-03 03:34:00,275 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:00,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 70 treesize of output 56 [2022-11-03 03:34:00,828 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:34:00,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:01,631 WARN L833 $PredicateComparison]: unable to prove that (or (= (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) |c_ULTIMATE.start_main_old_#valid#1|) (forall ((v_ArrVal_2009 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_98| Int) (v_ArrVal_2008 Int)) (or (not (= (select (select (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_98| v_ArrVal_2008))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse0) (select .cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2009)) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 0)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_98|)))) is different from false [2022-11-03 03:34:01,647 WARN L833 $PredicateComparison]: unable to prove that (or (= (store |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base| 0) |c_ULTIMATE.start_main_old_#valid#1|) (forall ((v_ArrVal_2009 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_98| Int) (v_ArrVal_2008 Int)) (or (not (= 0 (select (select (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_98| v_ArrVal_2008))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse0) (select .cse0 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) v_ArrVal_2009)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_98|)))) is different from false [2022-11-03 03:34:01,658 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:01,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 38 [2022-11-03 03:34:01,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:01,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:01,671 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:01,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 26 treesize of output 30 [2022-11-03 03:34:01,681 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:01,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 33 [2022-11-03 03:34:01,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 18 [2022-11-03 03:34:02,285 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 4 not checked. [2022-11-03 03:34:02,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741972247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:02,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [537700743] [2022-11-03 03:34:02,287 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-03 03:34:02,287 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:34:02,287 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:34:02,288 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:34:02,288 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:34:02,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:02,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:02,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:02,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:34:02,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:34:02,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:02,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:02,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:02,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:34:02,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:02,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:02,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2022-11-03 03:34:02,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:02,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:34:02,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:02,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:02,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:02,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-03 03:34:02,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:02,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:34:02,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:02,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:34:02,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:02,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:02,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:02,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:02,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:02,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-03 03:34:02,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:02,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:02,559 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:34:02,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 290 treesize of output 272 [2022-11-03 03:34:02,606 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:02,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:34:02,660 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:02,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:34:02,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:02,871 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:02,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 562 treesize of output 563 [2022-11-03 03:34:02,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:02,926 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:34:02,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 543 treesize of output 524 [2022-11-03 03:34:02,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:02,985 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:02,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 548 treesize of output 549 [2022-11-03 03:34:03,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:03,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:03,335 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:34:03,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 311 treesize of output 304 [2022-11-03 03:34:03,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:03,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:03,372 INFO L356 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-03 03:34:03,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 383 treesize of output 376 [2022-11-03 03:34:03,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:03,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:03,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:03,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:03,404 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:34:03,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 423 treesize of output 408 [2022-11-03 03:34:03,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:03,552 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:34:03,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 408 treesize of output 411 [2022-11-03 03:34:03,724 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:03,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:34:03,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:03,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:03,757 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:34:03,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 284 treesize of output 266 [2022-11-03 03:34:03,803 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:03,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:34:03,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:04,019 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:04,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 562 treesize of output 563 [2022-11-03 03:34:04,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:04,085 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:04,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 556 treesize of output 557 [2022-11-03 03:34:04,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:04,145 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:34:04,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 537 treesize of output 518 [2022-11-03 03:34:04,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:04,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:04,494 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:34:04,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 315 treesize of output 308 [2022-11-03 03:34:04,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:04,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:04,545 INFO L356 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-03 03:34:04,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 351 treesize of output 344 [2022-11-03 03:34:04,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:04,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:04,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:04,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:04,573 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:34:04,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 433 treesize of output 418 [2022-11-03 03:34:04,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:04,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:04,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:04,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:04,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:04,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:05,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:05,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-03 03:34:05,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-03 03:34:05,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:05,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:05,380 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:34:11,860 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6585#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_destroy_~head#1.base| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_destroy_~head#1.offset| 0) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-03 03:34:11,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:34:11,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:34:11,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 18] total 57 [2022-11-03 03:34:11,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629182626] [2022-11-03 03:34:11,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:34:11,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-03 03:34:11,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:11,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-03 03:34:11,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=4947, Unknown=9, NotChecked=286, Total=5550 [2022-11-03 03:34:11,864 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 57 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 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) [2022-11-03 03:34:14,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:14,582 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2022-11-03 03:34:14,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-03 03:34:14,583 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 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 39 [2022-11-03 03:34:14,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:14,583 INFO L225 Difference]: With dead ends: 80 [2022-11-03 03:34:14,583 INFO L226 Difference]: Without dead ends: 80 [2022-11-03 03:34:14,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 2 IntricatePredicates, 2 DeprecatedPredicates, 2708 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=594, Invalid=9089, Unknown=27, NotChecked=390, Total=10100 [2022-11-03 03:34:14,586 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:14,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 177 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 106 Unchecked, 0.1s Time] [2022-11-03 03:34:14,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-03 03:34:14,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 49. [2022-11-03 03:34:14,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 48 states have internal predecessors, (50), 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) [2022-11-03 03:34:14,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-11-03 03:34:14,589 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 39 [2022-11-03 03:34:14,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:14,590 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-11-03 03:34:14,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 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) [2022-11-03 03:34:14,590 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-11-03 03:34:14,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 03:34:14,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:14,591 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:14,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:14,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-03 03:34:14,806 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:34:14,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:14,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1159494269, now seen corresponding path program 1 times [2022-11-03 03:34:14,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:14,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724923183] [2022-11-03 03:34:14,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:14,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:34:15,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:15,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724923183] [2022-11-03 03:34:15,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724923183] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:15,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049846356] [2022-11-03 03:34:15,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:15,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:15,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:15,895 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:15,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 03:34:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:16,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 03:34:16,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:16,166 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 03:34:16,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 03:34:16,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:34:16,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:16,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 19 [2022-11-03 03:34:16,404 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:34:16,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-03 03:34:16,508 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:16,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 [2022-11-03 03:34:16,589 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:34:16,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-03 03:34:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:34:16,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:16,729 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:16,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 35 [2022-11-03 03:34:16,746 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_4 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_prenex_4) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_ULTIMATE.start_main_~s~0#1.base|))) (forall ((v_ArrVal_2121 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2121) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_ULTIMATE.start_sll_update_at_~head#1.base|))) is different from false [2022-11-03 03:34:16,759 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4)))) (and (forall ((v_prenex_4 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_prenex_4) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_ULTIMATE.start_main_~s~0#1.base|))) (forall ((v_ArrVal_2121 (Array Int Int))) (= .cse0 (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2121) |c_ULTIMATE.start_main_~s~0#1.base|) 4))))) is different from false [2022-11-03 03:34:16,776 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (and (forall ((v_prenex_4 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_prenex_4) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_ULTIMATE.start_main_~s~0#1.base|))) (forall ((v_ArrVal_2121 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2121) |c_ULTIMATE.start_main_~s~0#1.base|) 4) .cse0)))) is different from false [2022-11-03 03:34:16,787 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) (.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|))) (and (forall ((v_ArrVal_2120 Int) (v_prenex_4 (Array Int Int))) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store .cse2 |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2120)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) .cse1) v_prenex_4)) |c_ULTIMATE.start_main_~s~0#1.base|) 4)))) (forall ((v_ArrVal_2120 Int) (v_ArrVal_2121 (Array Int Int))) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store .cse2 |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2120)))) (let ((.cse4 (select (select .cse3 |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (= (select (select (store .cse3 .cse4 v_ArrVal_2121) |c_ULTIMATE.start_main_~s~0#1.base|) 4) .cse4)))))) is different from false [2022-11-03 03:34:16,813 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) (.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_106| Int)) (or (forall ((v_ArrVal_2120 Int) (v_prenex_4 (Array Int Int))) (not (= (select (select (let ((.cse0 (store .cse2 |v_ULTIMATE.start_sll_update_at_~head#1.offset_106| v_ArrVal_2120))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse0) (select .cse0 .cse1) v_prenex_4)) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_ULTIMATE.start_main_~s~0#1.base|))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_106|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_106| Int)) (or (forall ((v_ArrVal_2120 Int) (v_ArrVal_2121 (Array Int Int))) (let ((.cse4 (store .cse2 |v_ULTIMATE.start_sll_update_at_~head#1.offset_106| v_ArrVal_2120))) (let ((.cse3 (select .cse4 .cse1))) (= .cse3 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse4) .cse3 v_ArrVal_2121) |c_ULTIMATE.start_main_~s~0#1.base|) 4))))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_106|))))) is different from false [2022-11-03 03:34:16,832 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_106| Int)) (or (forall ((v_ArrVal_2120 Int) (v_prenex_4 (Array Int Int))) (not (= (select (select (let ((.cse0 (store .cse2 |v_ULTIMATE.start_sll_update_at_~head#1.offset_106| v_ArrVal_2120))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse0) (select .cse0 .cse1) v_prenex_4)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_106|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_106| Int)) (or (forall ((v_ArrVal_2120 Int) (v_ArrVal_2121 (Array Int Int))) (let ((.cse4 (store .cse2 |v_ULTIMATE.start_sll_update_at_~head#1.offset_106| v_ArrVal_2120))) (let ((.cse3 (select .cse4 .cse1))) (= .cse3 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse4) .cse3 v_ArrVal_2121) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4))))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_106|))))) is different from false [2022-11-03 03:34:16,855 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:16,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 49 [2022-11-03 03:34:16,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:16,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:16,864 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:16,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 25 treesize of output 29 [2022-11-03 03:34:16,874 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:16,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 30 [2022-11-03 03:34:16,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2022-11-03 03:34:16,894 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-03 03:34:16,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 1 [2022-11-03 03:34:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 8 not checked. [2022-11-03 03:34:16,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049846356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:16,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [22274125] [2022-11-03 03:34:16,932 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-03 03:34:16,932 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:34:16,932 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:34:16,933 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:34:16,933 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:34:16,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:16,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:16,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:16,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:34:16,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:16,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:16,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:34:17,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:17,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:34:17,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:17,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:34:17,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:17,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:17,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2022-11-03 03:34:17,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:17,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:34:17,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:17,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:34:17,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:17,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:17,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:17,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-03 03:34:17,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:17,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:17,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:17,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:17,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:17,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-03 03:34:17,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:17,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:17,183 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:34:17,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 297 treesize of output 279 [2022-11-03 03:34:17,225 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:17,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:34:17,270 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:17,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:34:17,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:17,609 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:17,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1002 treesize of output 997 [2022-11-03 03:34:17,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:17,670 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:17,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 990 treesize of output 985 [2022-11-03 03:34:17,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:17,726 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:34:17,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 965 treesize of output 914 [2022-11-03 03:34:18,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:18,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:18,206 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:34:18,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 324 treesize of output 317 [2022-11-03 03:34:18,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:18,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:18,246 INFO L356 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-03 03:34:18,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 408 treesize of output 401 [2022-11-03 03:34:18,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:18,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:18,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:18,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:18,281 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:34:18,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 454 treesize of output 439 [2022-11-03 03:34:18,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:18,430 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:34:18,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 439 treesize of output 434 [2022-11-03 03:34:18,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:18,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:18,598 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:34:18,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 297 treesize of output 279 [2022-11-03 03:34:18,637 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:18,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:34:18,680 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:18,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:34:18,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:18,840 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:18,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 319 [2022-11-03 03:34:18,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:18,892 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:18,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 312 treesize of output 313 [2022-11-03 03:34:18,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:18,945 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:34:18,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 293 treesize of output 294 [2022-11-03 03:34:19,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:19,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:19,193 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:34:19,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 329 treesize of output 322 [2022-11-03 03:34:19,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:19,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:19,231 INFO L356 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-03 03:34:19,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 419 treesize of output 412 [2022-11-03 03:34:19,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:19,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:19,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:19,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:19,264 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:34:19,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 471 treesize of output 456 [2022-11-03 03:34:19,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:19,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:19,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:19,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:19,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:19,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:19,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:19,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-03 03:34:19,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-03 03:34:20,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:20,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:20,114 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:34:24,620 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7051#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (not (= (select |#valid| |ULTIMATE.start_sll_destroy_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 03:34:24,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:34:24,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:34:24,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 15] total 34 [2022-11-03 03:34:24,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260509539] [2022-11-03 03:34:24,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:34:24,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 03:34:24,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:24,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 03:34:24,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1906, Unknown=6, NotChecked=558, Total=2652 [2022-11-03 03:34:24,623 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 35 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 35 states have internal predecessors, (80), 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) [2022-11-03 03:34:26,830 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (and (= (select (store |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base| 0) (select .cse0 4)) 1) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (= (select |c_#valid| |c_ULTIMATE.start_node_create_~temp~0#1.base|) 1) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_106| Int)) (or (forall ((v_ArrVal_2120 Int) (v_prenex_4 (Array Int Int))) (not (= (select (select (let ((.cse1 (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_106| v_ArrVal_2120))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse1) (select .cse1 .cse2) v_prenex_4)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_106|))) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_106| Int)) (or (forall ((v_ArrVal_2120 Int) (v_ArrVal_2121 (Array Int Int))) (let ((.cse4 (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_106| v_ArrVal_2120))) (let ((.cse3 (select .cse4 .cse2))) (= .cse3 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse4) .cse3 v_ArrVal_2121) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4))))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_106|))) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 1))) is different from false [2022-11-03 03:34:26,835 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) (.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|))) (and (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_106| Int)) (or (forall ((v_ArrVal_2120 Int) (v_prenex_4 (Array Int Int))) (not (= (select (select (let ((.cse0 (store .cse2 |v_ULTIMATE.start_sll_update_at_~head#1.offset_106| v_ArrVal_2120))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse0) (select .cse0 .cse1) v_prenex_4)) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_ULTIMATE.start_main_~s~0#1.base|))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_106|))) (= (select (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select .cse2 4)) 1) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_106| Int)) (or (forall ((v_ArrVal_2120 Int) (v_ArrVal_2121 (Array Int Int))) (let ((.cse4 (store .cse2 |v_ULTIMATE.start_sll_update_at_~head#1.offset_106| v_ArrVal_2120))) (let ((.cse3 (select .cse4 .cse1))) (= .cse3 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse4) .cse3 v_ArrVal_2121) |c_ULTIMATE.start_main_~s~0#1.base|) 4))))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_106|))))) is different from false [2022-11-03 03:34:27,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:27,396 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2022-11-03 03:34:27,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:34:27,397 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 35 states have internal predecessors, (80), 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 39 [2022-11-03 03:34:27,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:27,397 INFO L225 Difference]: With dead ends: 54 [2022-11-03 03:34:27,397 INFO L226 Difference]: Without dead ends: 54 [2022-11-03 03:34:27,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=282, Invalid=2934, Unknown=8, NotChecked=936, Total=4160 [2022-11-03 03:34:27,399 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 68 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:27,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 82 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 552 Invalid, 0 Unknown, 309 Unchecked, 0.3s Time] [2022-11-03 03:34:27,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-03 03:34:27,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2022-11-03 03:34:27,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 49 states have internal predecessors, (52), 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) [2022-11-03 03:34:27,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2022-11-03 03:34:27,402 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 39 [2022-11-03 03:34:27,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:27,403 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2022-11-03 03:34:27,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 35 states have internal predecessors, (80), 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) [2022-11-03 03:34:27,403 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2022-11-03 03:34:27,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 03:34:27,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:27,404 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:27,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:27,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:27,626 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:34:27,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:27,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1159494268, now seen corresponding path program 1 times [2022-11-03 03:34:27,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:27,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354351478] [2022-11-03 03:34:27,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:27,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:34:29,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:29,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354351478] [2022-11-03 03:34:29,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354351478] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:29,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851595992] [2022-11-03 03:34:29,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:29,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:29,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:29,777 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:29,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 03:34:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:29,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-03 03:34:29,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:30,102 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 03:34:30,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 03:34:30,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-11-03 03:34:30,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:30,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:34:30,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:30,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 24 [2022-11-03 03:34:30,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:30,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 [2022-11-03 03:34:30,666 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:34:30,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2022-11-03 03:34:30,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:30,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 22 [2022-11-03 03:34:30,960 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:30,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 [2022-11-03 03:34:30,969 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:30,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 17 treesize of output 15 [2022-11-03 03:34:31,139 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:34:31,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:31,474 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2239 (Array Int Int)) (v_ArrVal_2238 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2239) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2238) |c_ULTIMATE.start_main_~s~0#1.base|) 4)))) (forall ((v_ArrVal_2239 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2239) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 4)))) is different from false [2022-11-03 03:34:31,490 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4)))) (and (forall ((v_ArrVal_2239 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2239) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 4))) (forall ((v_ArrVal_2239 (Array Int Int)) (v_ArrVal_2238 (Array Int Int))) (<= (+ 8 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2239) |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2238) |c_ULTIMATE.start_main_~s~0#1.base|) 4)))))) is different from false [2022-11-03 03:34:31,506 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (and (forall ((v_ArrVal_2239 (Array Int Int)) (v_ArrVal_2238 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2239) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2238) |c_ULTIMATE.start_main_~s~0#1.base|) 4)))) (forall ((v_ArrVal_2239 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2239) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 4))))) is different from false [2022-11-03 03:34:31,534 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|)) (.cse4 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|)) (.cse3 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((v_ArrVal_2239 (Array Int Int)) (v_ArrVal_2238 (Array Int Int)) (v_ArrVal_2236 Int) (v_ArrVal_2235 Int)) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store .cse4 |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2235)))) (let ((.cse1 (select (select .cse2 |c_ULTIMATE.start_main_~s~0#1.base|) .cse3))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store .cse0 |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2236)) .cse1 v_ArrVal_2239) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 8) (select |c_#length| (select (select (store .cse2 .cse1 v_ArrVal_2238) |c_ULTIMATE.start_main_~s~0#1.base|) 4)))))) (forall ((v_ArrVal_2239 (Array Int Int)) (v_ArrVal_2236 Int) (v_ArrVal_2235 Int)) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store .cse0 |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2236)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store .cse4 |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2235)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse3) v_ArrVal_2239) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 4))))) is different from false [2022-11-03 03:34:31,572 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse4 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse3 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_114| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_114|) (forall ((v_ArrVal_2239 (Array Int Int)) (v_ArrVal_2238 (Array Int Int)) (v_ArrVal_2236 Int) (v_ArrVal_2235 Int)) (let ((.cse2 (store .cse4 |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2235))) (let ((.cse1 (select .cse2 .cse3))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2236)) .cse1 v_ArrVal_2239) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 8) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse2) .cse1 v_ArrVal_2238) |c_ULTIMATE.start_main_~s~0#1.base|) 4)))))))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_114| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_114|) (forall ((v_ArrVal_2239 (Array Int Int)) (v_ArrVal_2236 Int) (v_ArrVal_2235 Int)) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2236)) (select (store .cse4 |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2235) .cse3) v_ArrVal_2239) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 4))))))) is different from false [2022-11-03 03:34:31,601 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (.cse2 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_114| Int)) (or (forall ((v_ArrVal_2239 (Array Int Int)) (v_ArrVal_2236 Int) (v_ArrVal_2235 Int)) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base| (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2236)) (select (store .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2235) .cse2) v_ArrVal_2239) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 4))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_114|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_114| Int)) (or (forall ((v_ArrVal_2239 (Array Int Int)) (v_ArrVal_2238 (Array Int Int)) (v_ArrVal_2236 Int) (v_ArrVal_2235 Int)) (let ((.cse4 (store .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2235))) (let ((.cse3 (select .cse4 .cse2))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base| (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2236)) .cse3 v_ArrVal_2239) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 8) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse4) .cse3 v_ArrVal_2238) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4)))))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_114|))))) is different from false [2022-11-03 03:34:31,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:31,624 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:31,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 81 [2022-11-03 03:34:31,632 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:31,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 60 [2022-11-03 03:34:31,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:31,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:31,643 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:31,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 36 treesize of output 40 [2022-11-03 03:34:31,652 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:31,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 54 treesize of output 52 [2022-11-03 03:34:31,662 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:31,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 84 treesize of output 78 [2022-11-03 03:34:31,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 30 [2022-11-03 03:34:31,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 62 treesize of output 58 [2022-11-03 03:34:31,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:31,714 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:31,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2022-11-03 03:34:31,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 24 [2022-11-03 03:34:31,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:31,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:31,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:31,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 10 [2022-11-03 03:34:38,027 WARN L234 SmtUtils]: Spent 6.03s on a formula simplification. DAG size of input: 27 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:34:38,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 50 treesize of output 46 [2022-11-03 03:34:38,065 INFO L356 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2022-11-03 03:34:38,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 46 treesize of output 59 [2022-11-03 03:34:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 8 not checked. [2022-11-03 03:34:38,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851595992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:38,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [481331186] [2022-11-03 03:34:38,178 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-03 03:34:38,178 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:34:38,178 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:34:38,179 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:34:38,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:34:38,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:38,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:38,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:38,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:34:38,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:34:38,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:38,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:38,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:38,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:38,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2022-11-03 03:34:38,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:38,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:34:38,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:38,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:34:38,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:38,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:34:38,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:38,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:34:38,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:38,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:38,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:38,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-03 03:34:38,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:38,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:38,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:38,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:38,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:38,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-03 03:34:38,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:38,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:38,489 INFO L356 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-03 03:34:38,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 297 treesize of output 289 [2022-11-03 03:34:38,532 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:38,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 287 treesize of output 294 [2022-11-03 03:34:38,576 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:38,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 281 treesize of output 288 [2022-11-03 03:34:38,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:38,922 INFO L356 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-03 03:34:38,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 573 treesize of output 558 [2022-11-03 03:34:38,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:38,988 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:38,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 578 treesize of output 579 [2022-11-03 03:34:39,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:39,049 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:39,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 572 treesize of output 573 [2022-11-03 03:34:39,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:39,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:39,495 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:34:39,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 293 treesize of output 286 [2022-11-03 03:34:39,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:39,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:39,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:39,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:39,542 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:34:39,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 363 treesize of output 348 [2022-11-03 03:34:39,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:39,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:39,583 INFO L356 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-03 03:34:39,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 359 treesize of output 352 [2022-11-03 03:34:39,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:39,749 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:34:39,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 360 treesize of output 363 [2022-11-03 03:34:39,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:39,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:39,978 INFO L356 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-03 03:34:39,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 297 treesize of output 289 [2022-11-03 03:34:40,034 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:40,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 287 treesize of output 294 [2022-11-03 03:34:40,086 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:40,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 281 treesize of output 288 [2022-11-03 03:34:40,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:40,761 INFO L356 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-03 03:34:40,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1268 treesize of output 1205 [2022-11-03 03:34:40,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:40,838 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:40,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1265 treesize of output 1254 [2022-11-03 03:34:40,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:40,902 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:40,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1247 treesize of output 1236 [2022-11-03 03:34:41,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:41,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:41,633 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:34:41,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 310 treesize of output 303 [2022-11-03 03:34:41,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:41,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:41,671 INFO L356 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-03 03:34:41,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 352 treesize of output 345 [2022-11-03 03:34:41,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:41,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:41,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:41,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:41,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:41,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:41,702 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:34:41,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 428 treesize of output 413 [2022-11-03 03:34:41,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:41,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:41,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:41,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:41,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:41,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:42,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:42,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-03 03:34:42,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-03 03:34:42,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:42,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:42,558 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:34:48,011 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7487#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (or (not (<= (+ 8 |ULTIMATE.start_sll_destroy_~head#1.offset|) (select |#length| |ULTIMATE.start_sll_destroy_~head#1.base|))) (not (<= 0 (+ |ULTIMATE.start_sll_destroy_~head#1.offset| 4)))) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 03:34:48,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:34:48,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:34:48,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17, 17] total 55 [2022-11-03 03:34:48,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976689882] [2022-11-03 03:34:48,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:34:48,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-03 03:34:48,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:48,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-03 03:34:48,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=4156, Unknown=6, NotChecked=810, Total=5256 [2022-11-03 03:34:48,013 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 56 states, 55 states have (on average 2.0) internal successors, (110), 56 states have internal predecessors, (110), 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) [2022-11-03 03:34:50,570 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (.cse3 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (.cse0 (select |c_#length| |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (let ((.cse4 (<= 8 .cse0)) (.cse5 (select .cse2 .cse3)) (.cse1 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (and (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (<= (+ 8 |c_ULTIMATE.start_sll_create_~head~0#1.offset|) .cse0) (<= 8 (select |c_#length| |c_ULTIMATE.start_node_create_~temp~0#1.base|)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_114| Int)) (or (forall ((v_ArrVal_2239 (Array Int Int)) (v_ArrVal_2236 Int) (v_ArrVal_2235 Int)) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base| (store .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2236)) (select (store .cse2 |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2235) .cse3) v_ArrVal_2239) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 4))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_114|))) (or .cse4 (= |c_ULTIMATE.start_sll_create_~new_head~0#1.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (<= 8 (select |c_#length| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|)) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (not (= .cse5 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (= (select .cse1 .cse3) 0) (or (= |c_ULTIMATE.start_node_create_~temp~0#1.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse4) (<= 8 (select |c_#length| .cse5)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_114| Int)) (or (forall ((v_ArrVal_2239 (Array Int Int)) (v_ArrVal_2238 (Array Int Int)) (v_ArrVal_2236 Int) (v_ArrVal_2235 Int)) (let ((.cse7 (store .cse2 |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2235))) (let ((.cse6 (select .cse7 .cse3))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base| (store .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2236)) .cse6 v_ArrVal_2239) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 8) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse7) .cse6 v_ArrVal_2238) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4)))))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_114|))) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0)))) is different from false [2022-11-03 03:34:50,577 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|))) (let ((.cse7 (select .cse5 4))) (let ((.cse1 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse4 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) (.cse6 (<= 8 (select |c_#length| .cse7))) (.cse0 (= |c_ULTIMATE.start_main_~s~0#1.base| .cse7))) (and (not .cse0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_114| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_114|) (forall ((v_ArrVal_2239 (Array Int Int)) (v_ArrVal_2238 (Array Int Int)) (v_ArrVal_2236 Int) (v_ArrVal_2235 Int)) (let ((.cse3 (store .cse5 |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2235))) (let ((.cse2 (select .cse3 .cse4))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| (store .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2236)) .cse2 v_ArrVal_2239) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 8) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse3) .cse2 v_ArrVal_2238) |c_ULTIMATE.start_main_~s~0#1.base|) 4)))))))) .cse6 (= (select .cse1 4) 0) (= |c_ULTIMATE.start_main_~i~0#1| 0) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_114| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_114|) (forall ((v_ArrVal_2239 (Array Int Int)) (v_ArrVal_2236 Int) (v_ArrVal_2235 Int)) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| (store .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2236)) (select (store .cse5 |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2235) .cse4) v_ArrVal_2239) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 4))))) (or .cse6 .cse0 (= .cse7 0)))))) is different from false [2022-11-03 03:34:52,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:52,846 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2022-11-03 03:34:52,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-03 03:34:52,846 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.0) internal successors, (110), 56 states have internal predecessors, (110), 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 39 [2022-11-03 03:34:52,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:52,847 INFO L225 Difference]: With dead ends: 55 [2022-11-03 03:34:52,847 INFO L226 Difference]: Without dead ends: 55 [2022-11-03 03:34:52,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=689, Invalid=7703, Unknown=12, NotChecked=1496, Total=9900 [2022-11-03 03:34:52,849 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 126 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:52,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 93 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 783 Invalid, 0 Unknown, 348 Unchecked, 0.6s Time] [2022-11-03 03:34:52,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-03 03:34:52,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-11-03 03:34:52,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 50 states have internal predecessors, (52), 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) [2022-11-03 03:34:52,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-11-03 03:34:52,851 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 39 [2022-11-03 03:34:52,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:52,852 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-11-03 03:34:52,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.0) internal successors, (110), 56 states have internal predecessors, (110), 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) [2022-11-03 03:34:52,852 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-11-03 03:34:52,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 03:34:52,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:52,852 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:52,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:53,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:53,066 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:34:53,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:53,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1877435652, now seen corresponding path program 1 times [2022-11-03 03:34:53,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:53,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144599605] [2022-11-03 03:34:53,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:53,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:34:54,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:54,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144599605] [2022-11-03 03:34:54,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144599605] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:54,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816123610] [2022-11-03 03:34:54,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:54,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:54,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:54,037 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:54,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 03:34:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:54,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 03:34:54,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:54,401 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 03:34:54,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 03:34:54,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:34:54,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:54,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 22 [2022-11-03 03:34:54,779 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:34:54,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-03 03:34:54,907 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:54,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 19 [2022-11-03 03:34:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:34:54,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:55,087 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2350 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2350) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_#StackHeapBarrier|)) is different from false [2022-11-03 03:34:55,095 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2350 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4)) v_ArrVal_2350) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_#StackHeapBarrier|)) is different from false [2022-11-03 03:34:55,104 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2350 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2350) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_#StackHeapBarrier|)) is different from false [2022-11-03 03:34:55,110 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2349 Int) (v_ArrVal_2350 (Array Int Int))) (< (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2349)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2350)) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_#StackHeapBarrier|)) is different from false [2022-11-03 03:34:55,125 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_122| Int) (v_ArrVal_2349 Int) (v_ArrVal_2350 (Array Int Int))) (or (< (select (select (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_122| v_ArrVal_2349))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse0) (select .cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2350)) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_122|))) is different from false [2022-11-03 03:34:55,136 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_122| Int) (v_ArrVal_2349 Int) (v_ArrVal_2350 (Array Int Int))) (or (< (select (select (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_122| v_ArrVal_2349))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse0) (select .cse0 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) v_ArrVal_2350)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_122|))) is different from false [2022-11-03 03:34:55,144 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:55,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 37 [2022-11-03 03:34:55,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:55,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:55,153 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:55,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 25 treesize of output 29 [2022-11-03 03:34:55,160 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:55,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 30 [2022-11-03 03:34:55,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2022-11-03 03:34:55,250 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-03 03:34:55,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 12 [2022-11-03 03:34:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 8 not checked. [2022-11-03 03:34:55,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816123610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:55,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2034894361] [2022-11-03 03:34:55,259 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-03 03:34:55,259 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:34:55,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:34:55,260 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:34:55,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:34:55,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:55,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:55,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:34:55,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:34:55,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2022-11-03 03:34:55,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:34:55,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:34:55,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:55,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:34:55,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-03 03:34:55,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:55,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:34:55,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-03 03:34:55,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,523 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:34:55,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 290 treesize of output 272 [2022-11-03 03:34:55,563 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:55,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:34:55,602 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:55,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:34:55,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,801 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:55,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 562 treesize of output 563 [2022-11-03 03:34:55,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:55,858 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:34:55,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 543 treesize of output 524 [2022-11-03 03:34:55,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,918 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:55,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 548 treesize of output 549 [2022-11-03 03:34:56,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:56,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:56,231 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:34:56,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 293 treesize of output 286 [2022-11-03 03:34:56,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:56,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:56,267 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:34:56,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 305 treesize of output 298 [2022-11-03 03:34:56,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:56,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:56,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:56,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:56,294 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:34:56,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 375 treesize of output 360 [2022-11-03 03:34:56,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:56,412 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:34:56,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 360 treesize of output 363 [2022-11-03 03:34:56,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:56,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:56,563 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:34:56,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 290 treesize of output 272 [2022-11-03 03:34:56,603 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:56,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:34:56,646 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:56,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:34:56,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:56,792 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:56,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2022-11-03 03:34:56,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:56,843 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:56,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 305 treesize of output 306 [2022-11-03 03:34:56,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:56,903 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:34:56,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 286 treesize of output 287 [2022-11-03 03:34:57,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:57,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:57,269 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:34:57,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 327 treesize of output 320 [2022-11-03 03:34:57,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:57,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:57,318 INFO L356 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-03 03:34:57,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 375 treesize of output 368 [2022-11-03 03:34:57,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:57,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:57,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:57,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:57,348 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:34:57,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 463 treesize of output 448 [2022-11-03 03:34:57,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:57,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:57,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:57,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:57,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:57,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:57,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:57,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-03 03:34:58,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-03 03:34:58,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:58,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:58,148 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:35:02,826 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7945#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (not (< |ULTIMATE.start_sll_destroy_~head#1.base| |#StackHeapBarrier|)) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_destroy_~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 03:35:02,826 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:35:02,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:35:02,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 38 [2022-11-03 03:35:02,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442382792] [2022-11-03 03:35:02,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:35:02,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 03:35:02,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:35:02,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 03:35:02,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2263, Unknown=6, NotChecked=606, Total=3080 [2022-11-03 03:35:02,828 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 39 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 39 states have internal predecessors, (89), 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) [2022-11-03 03:35:03,266 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (.cse2 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (let ((.cse0 (select .cse3 .cse2))) (and (< |c_ULTIMATE.start_sll_create_~head~0#1.base| |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (< .cse0 |c_#StackHeapBarrier|) (<= (+ |c_ULTIMATE.start_sll_create_~head~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| |c_ULTIMATE.start_node_create_~temp~0#1.offset|) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (<= (+ |c_ULTIMATE.start_node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (not (= .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_122| Int) (v_ArrVal_2349 Int) (v_ArrVal_2350 (Array Int Int))) (or (< (select (select (let ((.cse1 (store .cse3 |v_ULTIMATE.start_sll_update_at_~head#1.offset_122| v_ArrVal_2349))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse1) (select .cse1 .cse2) v_ArrVal_2350)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_122|))) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (<= (+ |c_ULTIMATE.start_sll_create_~new_head~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= (+ (select .cse3 4) 1) |c_#StackHeapBarrier|)))) is different from false [2022-11-03 03:35:03,271 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|))) (let ((.cse0 (select .cse2 4))) (and (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_122| Int) (v_ArrVal_2349 Int) (v_ArrVal_2350 (Array Int Int))) (or (< (select (select (let ((.cse1 (store .cse2 |v_ULTIMATE.start_sll_update_at_~head#1.offset_122| v_ArrVal_2349))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse1) (select .cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2350)) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_122|))) (= |c_ULTIMATE.start_main_~s~0#1.offset| (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (<= (+ .cse0 1) |c_#StackHeapBarrier|) (< .cse0 |c_#StackHeapBarrier|)))) is different from false [2022-11-03 03:35:04,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:04,396 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2022-11-03 03:35:04,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 03:35:04,397 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 39 states have internal predecessors, (89), 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 41 [2022-11-03 03:35:04,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:04,397 INFO L225 Difference]: With dead ends: 56 [2022-11-03 03:35:04,397 INFO L226 Difference]: Without dead ends: 56 [2022-11-03 03:35:04,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 71 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=415, Invalid=3769, Unknown=8, NotChecked=1064, Total=5256 [2022-11-03 03:35:04,399 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 138 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:04,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 122 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 612 Invalid, 0 Unknown, 283 Unchecked, 0.4s Time] [2022-11-03 03:35:04,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-03 03:35:04,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-11-03 03:35:04,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.127659574468085) internal successors, (53), 51 states have internal predecessors, (53), 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) [2022-11-03 03:35:04,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-11-03 03:35:04,401 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 41 [2022-11-03 03:35:04,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:04,401 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-11-03 03:35:04,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 39 states have internal predecessors, (89), 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) [2022-11-03 03:35:04,402 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-11-03 03:35:04,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 03:35:04,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:04,402 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:04,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-03 03:35:04,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-03 03:35:04,610 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:35:04,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:04,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1621217452, now seen corresponding path program 2 times [2022-11-03 03:35:04,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:04,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251676794] [2022-11-03 03:35:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:04,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:04,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:35:06,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:35:06,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251676794] [2022-11-03 03:35:06,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251676794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:06,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837964125] [2022-11-03 03:35:06,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:35:06,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:06,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:06,775 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:35:06,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 03:35:07,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:35:07,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:35:07,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-03 03:35:07,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:07,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:07,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:07,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 52 treesize of output 39 [2022-11-03 03:35:07,764 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:35:07,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 52 [2022-11-03 03:35:07,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 26 [2022-11-03 03:35:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:35:08,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:08,466 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2465 (Array Int Int))) (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2465) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) 0) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2022-11-03 03:35:08,474 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2465 (Array Int Int))) (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4)) v_ArrVal_2465) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) 0))) is different from false [2022-11-03 03:35:08,483 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2465 (Array Int Int))) (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse0) v_ArrVal_2465) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0)) 0) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2022-11-03 03:35:08,490 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2463 Int) (v_ArrVal_2465 (Array Int Int))) (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2463)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) .cse1) v_ArrVal_2465)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)) 0) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2022-11-03 03:35:08,504 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2463 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_130| Int) (v_ArrVal_2465 (Array Int Int))) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_130|) (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_130| v_ArrVal_2463))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse0) (select .cse0 .cse1) v_ArrVal_2465)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)) 0) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2022-11-03 03:35:08,514 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2463 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_130| Int) (v_ArrVal_2465 (Array Int Int))) (or (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base| 0) (let ((.cse1 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (select (select (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_130| v_ArrVal_2463))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse0) (select .cse0 .cse1) v_ArrVal_2465)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse1)) 0)) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_130|))) is different from false [2022-11-03 03:35:08,524 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:35:08,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 49 [2022-11-03 03:35:08,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:08,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:08,534 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:35:08,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 37 treesize of output 41 [2022-11-03 03:35:08,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 44 [2022-11-03 03:35:08,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2022-11-03 03:35:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 9 not checked. [2022-11-03 03:35:31,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837964125] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:31,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2036335885] [2022-11-03 03:35:31,458 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-03 03:35:31,458 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:35:31,458 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:35:31,458 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:35:31,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:35:31,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:31,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:31,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:31,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:35:31,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 03:35:31,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:31,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:31,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:31,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:35:31,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:31,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:31,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2022-11-03 03:35:31,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:31,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-11-03 03:35:31,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:31,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:35:31,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:31,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 13 [2022-11-03 03:35:31,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:31,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:31,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:31,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-03 03:35:31,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:31,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:31,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:31,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:31,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:31,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-03 03:35:31,755 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:35:31,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:35:31,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:31,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:31,812 INFO L356 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-03 03:35:31,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 291 treesize of output 283 [2022-11-03 03:35:31,855 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:35:31,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 281 treesize of output 288 [2022-11-03 03:35:32,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:32,393 INFO L356 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-03 03:35:32,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1268 treesize of output 1205 [2022-11-03 03:35:32,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:32,465 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:35:32,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1265 treesize of output 1254 [2022-11-03 03:35:32,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:32,526 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:35:32,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1247 treesize of output 1236 [2022-11-03 03:35:32,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:32,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:32,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:32,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:33,004 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:35:33,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 297 treesize of output 282 [2022-11-03 03:35:33,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:33,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:33,038 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:35:33,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 293 treesize of output 286 [2022-11-03 03:35:33,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:33,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:33,068 INFO L356 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-03 03:35:33,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 359 treesize of output 352 [2022-11-03 03:35:33,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,204 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:35:33,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 360 treesize of output 363 [2022-11-03 03:35:33,356 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:35:33,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:35:33,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,411 INFO L356 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-03 03:35:33,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 291 treesize of output 283 [2022-11-03 03:35:33,461 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:35:33,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 281 treesize of output 288 [2022-11-03 03:35:33,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,814 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:35:33,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 855 treesize of output 850 [2022-11-03 03:35:33,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,869 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:35:33,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 843 treesize of output 838 [2022-11-03 03:35:33,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:33,940 INFO L356 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-03 03:35:33,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 818 treesize of output 787 [2022-11-03 03:35:34,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:34,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:34,485 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:35:34,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 293 treesize of output 286 [2022-11-03 03:35:34,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:34,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:34,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:34,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:34,518 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:35:34,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 363 treesize of output 348 [2022-11-03 03:35:34,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:34,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:34,552 INFO L356 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-03 03:35:34,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 359 treesize of output 352 [2022-11-03 03:35:34,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:34,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:34,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:34,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:34,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:34,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:35,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:35,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-03 03:35:35,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-03 03:35:35,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:35,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:35,320 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:35:40,922 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8423#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_destroy_~head#1.base| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_destroy_~head#1.offset| 0) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-03 03:35:40,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:35:40,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:35:40,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15, 17] total 54 [2022-11-03 03:35:40,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332486433] [2022-11-03 03:35:40,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:35:40,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-03 03:35:40,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:35:40,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-03 03:35:40,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=4432, Unknown=11, NotChecked=834, Total=5550 [2022-11-03 03:35:40,924 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 56 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 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) [2022-11-03 03:35:41,590 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse6 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (.cse5 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (let ((.cse1 (select .cse6 .cse5))) (let ((.cse0 (select .cse6 4)) (.cse3 (store |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base| 0)) (.cse2 (store |c_ULTIMATE.start_main_old_#valid#1| .cse1 1))) (and (or (not (= .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (= (select |c_ULTIMATE.start_main_old_#valid#1| .cse1) 0) (exists ((v_ArrVal_2460 Int)) (= |c_#valid| (store .cse2 |c_ULTIMATE.start_sll_create_~head~0#1.base| v_ArrVal_2460))) (or (= |c_ULTIMATE.start_main_old_#valid#1| (store .cse3 .cse0 0)) (= .cse0 0)) (forall ((v_ArrVal_2463 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_130| Int) (v_ArrVal_2465 (Array Int Int))) (or (= |c_ULTIMATE.start_main_old_#valid#1| (store .cse3 (select (select (let ((.cse4 (store .cse6 |v_ULTIMATE.start_sll_update_at_~head#1.offset_130| v_ArrVal_2463))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse4) (select .cse4 .cse5) v_ArrVal_2465)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse5) 0)) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_130|))) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select .cse2 |c_ULTIMATE.start_sll_create_~head~0#1.base|) 0))))) is different from false [2022-11-03 03:35:41,596 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse3 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse5 (select .cse4 .cse3))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| .cse5 1)) (.cse1 (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0)) (.cse6 (select .cse4 4))) (and (= (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) 0) (forall ((v_ArrVal_2463 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_130| Int) (v_ArrVal_2465 (Array Int Int))) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_130|) (= (store .cse1 (select (select (let ((.cse2 (store .cse4 |v_ULTIMATE.start_sll_update_at_~head#1.offset_130| v_ArrVal_2463))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse2) (select .cse2 .cse3) v_ArrVal_2465)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse3) 0) |c_ULTIMATE.start_main_old_#valid#1|))) (exists ((v_ArrVal_2460 Int)) (= |c_#valid| (store .cse0 |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_2460))) (= (select |c_ULTIMATE.start_main_old_#valid#1| .cse5) 0) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (or (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse6)) (and (= |c_ULTIMATE.start_main_~s~0#1.offset| (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (= |c_ULTIMATE.start_main_~i~0#1| 0))) (or (= (store .cse1 .cse6 0) |c_ULTIMATE.start_main_old_#valid#1|) (= .cse6 0)))))) is different from false [2022-11-03 03:35:42,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:42,813 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2022-11-03 03:35:42,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 03:35:42,814 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 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 44 [2022-11-03 03:35:42,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:42,814 INFO L225 Difference]: With dead ends: 89 [2022-11-03 03:35:42,814 INFO L226 Difference]: Without dead ends: 88 [2022-11-03 03:35:42,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 81 SyntacticMatches, 10 SemanticMatches, 90 ConstructedPredicates, 8 IntricatePredicates, 1 DeprecatedPredicates, 2057 ImplicationChecksByTransitivity, 31.9s TimeCoverageRelationStatistics Valid=424, Invalid=6567, Unknown=13, NotChecked=1368, Total=8372 [2022-11-03 03:35:42,815 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:42,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 248 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 217 Invalid, 0 Unknown, 258 Unchecked, 0.2s Time] [2022-11-03 03:35:42,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-03 03:35:42,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-11-03 03:35:42,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 87 states have internal predecessors, (90), 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) [2022-11-03 03:35:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2022-11-03 03:35:42,818 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 44 [2022-11-03 03:35:42,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:42,819 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2022-11-03 03:35:42,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 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) [2022-11-03 03:35:42,819 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2022-11-03 03:35:42,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 03:35:42,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:42,820 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:42,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:43,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-03 03:35:43,022 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:35:43,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:43,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1621218678, now seen corresponding path program 2 times [2022-11-03 03:35:43,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:43,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669091375] [2022-11-03 03:35:43,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:43,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:43,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:35:44,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:35:44,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669091375] [2022-11-03 03:35:44,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669091375] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:44,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824712368] [2022-11-03 03:35:44,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:35:44,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:44,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:44,872 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:35:44,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0694e8bb-af1b-4694-b638-87a7d73137f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-03 03:35:45,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:35:45,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:35:45,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-03 03:35:45,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:45,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:45,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:45,228 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 03:35:45,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 03:35:45,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-11-03 03:35:45,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-11-03 03:35:45,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-11-03 03:35:45,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-11-03 03:35:45,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:45,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:45,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:45,558 INFO L356 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-03 03:35:45,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 41 [2022-11-03 03:35:45,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:45,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2022-11-03 03:35:45,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:45,752 INFO L356 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-11-03 03:35:45,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 52 [2022-11-03 03:35:45,765 INFO L356 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-03 03:35:45,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 45 [2022-11-03 03:35:46,139 INFO L356 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-11-03 03:35:46,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 38 [2022-11-03 03:35:46,153 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:35:46,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 26 treesize of output 18 [2022-11-03 03:35:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:35:46,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:51,002 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse5 (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse5))) (let ((.cse3 (select |c_#memory_$Pointer$.base| .cse2)) (.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) (.cse4 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse5))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_137| Int)) (or (forall ((v_ArrVal_2593 Int)) (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| .cse2 (store .cse3 |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| v_ArrVal_2593)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) 4) 0)) (not (<= |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| .cse4)))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_137| Int)) (or (forall ((v_ArrVal_2593 Int) (v_ArrVal_2594 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| .cse2 (store (select |c_#memory_$Pointer$.offset| .cse2) |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| v_ArrVal_2594)) (select (select (store |c_#memory_$Pointer$.base| .cse2 (store .cse3 |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| v_ArrVal_2593)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)) 4) 0)) (not (<= |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| .cse4)))))))) is different from false [2022-11-03 03:35:53,014 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse3))) (let ((.cse0 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse3)) (.cse2 (select |c_#memory_$Pointer$.base| .cse1))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_137| Int)) (or (not (<= |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| .cse0)) (forall ((v_ArrVal_2593 Int) (v_ArrVal_2594 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| .cse1 (store (select |c_#memory_$Pointer$.offset| .cse1) |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| v_ArrVal_2594)) (select (select (store |c_#memory_$Pointer$.base| .cse1 (store .cse2 |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| v_ArrVal_2593)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse3)) 4) 0)))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_137| Int)) (or (not (<= |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| .cse0)) (forall ((v_ArrVal_2593 Int)) (= (select (let ((.cse4 (store |c_#memory_$Pointer$.base| .cse1 (store .cse2 |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| v_ArrVal_2593)))) (select .cse4 (select (select .cse4 |c_ULTIMATE.start_main_~s~0#1.base|) .cse3))) 4) 0)))))))) is different from false [2022-11-03 03:35:55,036 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) (.cse4 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|)) (.cse5 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|))) (and (forall ((v_ArrVal_2590 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_137| Int) (v_ArrVal_2588 Int)) (or (forall ((v_ArrVal_2593 Int)) (= (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store .cse4 |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2590)))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (store .cse2 .cse3 (store (select .cse2 .cse3) |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| v_ArrVal_2593)))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) 4) 0)) (not (<= |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store .cse5 |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2588)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))))) (forall ((v_ArrVal_2590 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_137| Int) (v_ArrVal_2588 Int)) (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store .cse5 |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2588)))) (or (not (<= |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| (select (select .cse6 |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (forall ((v_ArrVal_2593 Int) (v_ArrVal_2594 Int)) (= (select (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store .cse4 |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2590)))) (let ((.cse7 (select (select .cse8 |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (select (store .cse6 .cse7 (store (select .cse6 .cse7) |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| v_ArrVal_2594)) (select (select (store .cse8 .cse7 (store (select .cse8 .cse7) |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| v_ArrVal_2593)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)))) 4) 0))))))) is different from false [2022-11-03 03:35:57,087 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) (.cse6 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_139| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_139|) (forall ((v_ArrVal_2590 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_137| Int) (v_ArrVal_2588 Int)) (or (not (<= |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| (select (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_139| v_ArrVal_2588) .cse1))) (forall ((v_ArrVal_2593 Int)) (= (select (let ((.cse2 (let ((.cse5 (store .cse6 |v_ULTIMATE.start_sll_update_at_~head#1.offset_139| v_ArrVal_2590))) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse5)) (.cse4 (select .cse5 .cse1))) (store .cse3 .cse4 (store (select .cse3 .cse4) |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| v_ArrVal_2593)))))) (select .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) 4) 0)))))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_139| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_139|) (forall ((v_ArrVal_2590 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_137| Int) (v_ArrVal_2588 Int)) (let ((.cse7 (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_139| v_ArrVal_2588))) (or (not (<= |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| (select .cse7 .cse1))) (forall ((v_ArrVal_2593 Int) (v_ArrVal_2594 Int)) (= (select (let ((.cse11 (store .cse6 |v_ULTIMATE.start_sll_update_at_~head#1.offset_139| v_ArrVal_2590))) (let ((.cse9 (select .cse11 .cse1))) (select (let ((.cse8 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| .cse7))) (store .cse8 .cse9 (store (select .cse8 .cse9) |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| v_ArrVal_2594))) (select (select (let ((.cse10 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse11))) (store .cse10 .cse9 (store (select .cse10 .cse9) |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| v_ArrVal_2593))) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)))) 4) 0))))))))) is different from false [2022-11-03 03:35:59,126 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (.cse1 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (.cse6 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_139| Int)) (or (forall ((v_ArrVal_2590 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_137| Int) (v_ArrVal_2588 Int)) (or (forall ((v_ArrVal_2593 Int)) (= (select (let ((.cse0 (let ((.cse4 (store .cse5 |v_ULTIMATE.start_sll_update_at_~head#1.offset_139| v_ArrVal_2590))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse4)) (.cse3 (select .cse4 .cse1))) (store .cse2 .cse3 (store (select .cse2 .cse3) |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| v_ArrVal_2593)))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse1))) 4) 0)) (not (<= |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| (select (store .cse6 |v_ULTIMATE.start_sll_update_at_~head#1.offset_139| v_ArrVal_2588) .cse1))))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_139|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_139| Int)) (or (forall ((v_ArrVal_2590 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_137| Int) (v_ArrVal_2588 Int)) (let ((.cse9 (store .cse6 |v_ULTIMATE.start_sll_update_at_~head#1.offset_139| v_ArrVal_2588))) (or (forall ((v_ArrVal_2593 Int) (v_ArrVal_2594 Int)) (= (select (let ((.cse11 (store .cse5 |v_ULTIMATE.start_sll_update_at_~head#1.offset_139| v_ArrVal_2590))) (let ((.cse8 (select .cse11 .cse1))) (select (let ((.cse7 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse9))) (store .cse7 .cse8 (store (select .cse7 .cse8) |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| v_ArrVal_2594))) (select (select (let ((.cse10 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse11))) (store .cse10 .cse8 (store (select .cse10 .cse8) |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| v_ArrVal_2593))) |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse1)))) 4) 0)) (not (<= |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| (select .cse9 .cse1)))))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_139|))))) is different from false [2022-11-03 03:36:01,193 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse6 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|)) (.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|))) (and (forall ((v_ArrVal_2586 Int)) (or (not (<= v_ArrVal_2586 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (forall ((|ULTIMATE.start_sll_create_~new_head~0#1.offset| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_139| Int)) (or (forall ((v_ArrVal_2590 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_137| Int) (v_ArrVal_2588 Int)) (let ((.cse1 (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (or (not (<= |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| (select (store (store .cse0 .cse1 v_ArrVal_2586) |v_ULTIMATE.start_sll_update_at_~head#1.offset_139| v_ArrVal_2588) .cse1))) (forall ((v_ArrVal_2593 Int)) (= (select (let ((.cse2 (let ((.cse5 (store (store .cse6 .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_139| v_ArrVal_2590))) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| .cse5)) (.cse4 (select .cse5 .cse1))) (store .cse3 .cse4 (store (select .cse3 .cse4) |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| v_ArrVal_2593)))))) (select .cse2 (select (select .cse2 |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse1))) 4) 0))))) (< |ULTIMATE.start_sll_create_~new_head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_139|))))) (forall ((v_ArrVal_2586 Int)) (or (forall ((|ULTIMATE.start_sll_create_~new_head~0#1.offset| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_139| Int)) (or (forall ((v_ArrVal_2590 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_137| Int) (v_ArrVal_2588 Int)) (let ((.cse8 (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (let ((.cse7 (store (store .cse0 .cse8 v_ArrVal_2586) |v_ULTIMATE.start_sll_update_at_~head#1.offset_139| v_ArrVal_2588))) (or (not (<= |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| (select .cse7 .cse8))) (forall ((v_ArrVal_2593 Int) (v_ArrVal_2594 Int)) (= (select (let ((.cse12 (store (store .cse6 .cse8 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_139| v_ArrVal_2590))) (let ((.cse10 (select .cse12 .cse8))) (select (let ((.cse9 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| .cse7))) (store .cse9 .cse10 (store (select .cse9 .cse10) |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| v_ArrVal_2594))) (select (select (let ((.cse11 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| .cse12))) (store .cse11 .cse10 (store (select .cse11 .cse10) |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| v_ArrVal_2593))) |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse8)))) 4) 0)))))) (< |ULTIMATE.start_sll_create_~new_head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_139|))) (not (<= v_ArrVal_2586 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)))))) is different from false [2022-11-03 03:36:01,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:01,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:01,239 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:36:01,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 56 [2022-11-03 03:36:01,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:01,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:01,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:01,272 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:36:01,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 126 treesize of output 124 [2022-11-03 03:36:01,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:01,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:01,285 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:36:01,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 56 [2022-11-03 03:36:01,306 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_sll_create_~new_head~0#1.offset| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_137| Int) (v_ArrVal_2593 Int) (v_arrayElimArr_15 (Array Int Int)) (v_arrayElimArr_14 (Array Int Int)) (v_ArrVal_2594 Int)) (let ((.cse1 (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (let ((.cse0 (select v_arrayElimArr_14 .cse1))) (or (not (<= |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| .cse0)) (not (<= .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| (select v_arrayElimArr_15 .cse1))) (= (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_14))) (store .cse2 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse2 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| v_ArrVal_2594))) (select (select (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_15))) (store .cse3 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse3 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| v_ArrVal_2593))) |c_ULTIMATE.start_node_create_~temp~0#1.base|) .cse1)) 4) 0))))) (forall ((|ULTIMATE.start_sll_create_~new_head~0#1.offset| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_137| Int) (v_arrayElimArr_13 (Array Int Int)) (v_ArrVal_2593 Int)) (let ((.cse4 (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (or (not (= (select v_arrayElimArr_13 .cse4) |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (= (select (let ((.cse5 (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_13))) (store .cse6 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse6 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_137| v_ArrVal_2593))))) (select .cse5 (select (select .cse5 |c_ULTIMATE.start_node_create_~temp~0#1.base|) .cse4))) 4) 0) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_137|))))) is different from false [2022-11-03 03:36:01,623 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:36:01,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 212 treesize of output 163 [2022-11-03 03:36:01,638 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:36:01,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 152 treesize of output 143 [2022-11-03 03:36:01,739 INFO L356 Elim1Store]: treesize reduction 27, result has 67.1 percent of original size [2022-11-03 03:36:01,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 995 treesize of output 971 [2022-11-03 03:36:01,850 INFO L356 Elim1Store]: treesize reduction 34, result has 67.0 percent of original size [2022-11-03 03:36:01,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1765 treesize of output 1742 [2022-11-03 03:36:01,904 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:36:01,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1745 treesize of output 1712 [2022-11-03 03:36:01,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2064 treesize of output 1872 [2022-11-03 03:36:02,060 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:36:02,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1810 treesize of output 1828 [2022-11-03 03:36:02,170 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:36:02,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1987 treesize of output 1865