./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P --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 6c2ed91303515fb47ae50633bb4ba0c83e07781b13d03a95e0e32251f9fc3016 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:51:36,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:51:36,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:51:36,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:51:36,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:51:36,886 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:51:36,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:51:36,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:51:36,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:51:36,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:51:36,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:51:36,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:51:36,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:51:36,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:51:36,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:51:36,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:51:36,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:51:36,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:51:36,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:51:36,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:51:36,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:51:36,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:51:36,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:51:36,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:51:36,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:51:36,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:51:36,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:51:36,920 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:51:36,920 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:51:36,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:51:36,922 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:51:36,923 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:51:36,924 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:51:36,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:51:36,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:51:36,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:51:36,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:51:36,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:51:36,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:51:36,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:51:36,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:51:36,935 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-20 22:51:36,985 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:51:36,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:51:36,986 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:51:36,986 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:51:36,987 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:51:36,988 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:51:36,988 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:51:36,988 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:51:36,988 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:51:36,989 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 22:51:36,989 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:51:36,990 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:51:36,990 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 22:51:36,990 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 22:51:36,990 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:51:36,991 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 22:51:36,991 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 22:51:36,991 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 22:51:36,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 22:51:36,992 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 22:51:36,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:51:36,992 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 22:51:36,993 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 22:51:36,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:51:36,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 22:51:36,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:51:36,993 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 22:51:36,994 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 22:51:36,994 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 22:51:36,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:51:36,994 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 22:51:36,995 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 22:51:36,995 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:51:36,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:51:36,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:51:36,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:51:36,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:51:36,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:51:36,996 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 22:51:36,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 22:51:36,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:51:36,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:51:36,998 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c2ed91303515fb47ae50633bb4ba0c83e07781b13d03a95e0e32251f9fc3016 [2021-11-20 22:51:37,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:51:37,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:51:37,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:51:37,291 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:51:37,293 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:51:37,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-simple/dll2c_remove_all.i [2021-11-20 22:51:37,378 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/data/e648e0865/b64b03e9383048d5b2330473ab0bb260/FLAG66192bcd4 [2021-11-20 22:51:37,906 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:51:37,910 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/sv-benchmarks/c/list-simple/dll2c_remove_all.i [2021-11-20 22:51:37,933 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/data/e648e0865/b64b03e9383048d5b2330473ab0bb260/FLAG66192bcd4 [2021-11-20 22:51:38,215 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/data/e648e0865/b64b03e9383048d5b2330473ab0bb260 [2021-11-20 22:51:38,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:51:38,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:51:38,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:51:38,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:51:38,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:51:38,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:51:38" (1/1) ... [2021-11-20 22:51:38,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@482cb744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:38, skipping insertion in model container [2021-11-20 22:51:38,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:51:38" (1/1) ... [2021-11-20 22:51:38,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:51:38,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:51:38,570 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_390355da-5d32-4606-a429-39508b7fe775/sv-benchmarks/c/list-simple/dll2c_remove_all.i[24169,24182] [2021-11-20 22:51:38,572 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:51:38,580 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:51:38,621 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_390355da-5d32-4606-a429-39508b7fe775/sv-benchmarks/c/list-simple/dll2c_remove_all.i[24169,24182] [2021-11-20 22:51:38,630 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:51:38,667 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:51:38,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:38 WrapperNode [2021-11-20 22:51:38,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:51:38,669 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:51:38,670 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:51:38,670 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:51:38,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:38" (1/1) ... [2021-11-20 22:51:38,708 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:38" (1/1) ... [2021-11-20 22:51:38,737 INFO L137 Inliner]: procedures = 126, calls = 38, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 111 [2021-11-20 22:51:38,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:51:38,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:51:38,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:51:38,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:51:38,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:38" (1/1) ... [2021-11-20 22:51:38,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:38" (1/1) ... [2021-11-20 22:51:38,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:38" (1/1) ... [2021-11-20 22:51:38,752 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:38" (1/1) ... [2021-11-20 22:51:38,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:38" (1/1) ... [2021-11-20 22:51:38,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:38" (1/1) ... [2021-11-20 22:51:38,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:38" (1/1) ... [2021-11-20 22:51:38,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:51:38,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:51:38,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:51:38,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:51:38,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:38" (1/1) ... [2021-11-20 22:51:38,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:51:38,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:38,817 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:51:38,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:51:38,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 22:51:38,859 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-20 22:51:38,859 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-20 22:51:38,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 22:51:38,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:51:38,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 22:51:38,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 22:51:38,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 22:51:38,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 22:51:38,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 22:51:38,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 22:51:38,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:51:38,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:51:38,963 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:51:38,964 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:51:39,303 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:51:39,343 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:51:39,344 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 22:51:39,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:51:39 BoogieIcfgContainer [2021-11-20 22:51:39,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:51:39,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:51:39,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:51:39,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:51:39,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:51:38" (1/3) ... [2021-11-20 22:51:39,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69836d03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:51:39, skipping insertion in model container [2021-11-20 22:51:39,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:38" (2/3) ... [2021-11-20 22:51:39,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69836d03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:51:39, skipping insertion in model container [2021-11-20 22:51:39,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:51:39" (3/3) ... [2021-11-20 22:51:39,356 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_remove_all.i [2021-11-20 22:51:39,361 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:51:39,361 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2021-11-20 22:51:39,423 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:51:39,430 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 22:51:39,430 INFO L340 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2021-11-20 22:51:39,455 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 40 states have (on average 2.3) internal successors, (92), 86 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:51:39,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 22:51:39,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:39,463 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 22:51:39,463 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 22:51:39,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:39,469 INFO L85 PathProgramCache]: Analyzing trace with hash 172432485, now seen corresponding path program 1 times [2021-11-20 22:51:39,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:39,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129889174] [2021-11-20 22:51:39,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:39,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:39,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:39,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:39,651 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:39,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129889174] [2021-11-20 22:51:39,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129889174] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:39,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:39,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 22:51:39,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616251872] [2021-11-20 22:51:39,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:39,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:51:39,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:39,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:51:39,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:39,689 INFO L87 Difference]: Start difference. First operand has 90 states, 40 states have (on average 2.3) internal successors, (92), 86 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:39,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:39,800 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2021-11-20 22:51:39,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:51:39,803 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-20 22:51:39,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:39,811 INFO L225 Difference]: With dead ends: 87 [2021-11-20 22:51:39,811 INFO L226 Difference]: Without dead ends: 85 [2021-11-20 22:51:39,813 INFO L932 BasicCegarLoop]: 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 [2021-11-20 22:51:39,817 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 8 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:39,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 115 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:51:39,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-20 22:51:39,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-11-20 22:51:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 81 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:51:39,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2021-11-20 22:51:39,861 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 5 [2021-11-20 22:51:39,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:39,861 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2021-11-20 22:51:39,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:39,862 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2021-11-20 22:51:39,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 22:51:39,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:39,862 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 22:51:39,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 22:51:39,863 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 22:51:39,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:39,864 INFO L85 PathProgramCache]: Analyzing trace with hash 172432486, now seen corresponding path program 1 times [2021-11-20 22:51:39,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:39,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39546085] [2021-11-20 22:51:39,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:39,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:39,983 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:39,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39546085] [2021-11-20 22:51:39,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39546085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:39,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:39,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 22:51:39,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611483072] [2021-11-20 22:51:39,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:39,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:51:39,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:39,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:51:39,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:39,987 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:40,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:40,095 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2021-11-20 22:51:40,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:51:40,096 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-20 22:51:40,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:40,102 INFO L225 Difference]: With dead ends: 82 [2021-11-20 22:51:40,103 INFO L226 Difference]: Without dead ends: 82 [2021-11-20 22:51:40,107 INFO L932 BasicCegarLoop]: 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 [2021-11-20 22:51:40,109 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 3 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 120 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 [2021-11-20 22:51:40,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 120 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:51:40,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-20 22:51:40,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-11-20 22:51:40,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 78 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:51:40,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-11-20 22:51:40,128 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 5 [2021-11-20 22:51:40,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:40,128 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-11-20 22:51:40,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:40,129 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-11-20 22:51:40,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 22:51:40,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:40,133 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:40,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 22:51:40,134 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 22:51:40,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:40,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1125600112, now seen corresponding path program 1 times [2021-11-20 22:51:40,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:40,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426920837] [2021-11-20 22:51:40,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:40,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:40,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:40,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:40,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426920837] [2021-11-20 22:51:40,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426920837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:40,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:40,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:51:40,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492855269] [2021-11-20 22:51:40,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:40,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:51:40,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:40,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:51:40,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:40,227 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 22:51:40,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:40,249 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2021-11-20 22:51:40,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:51:40,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-20 22:51:40,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:40,251 INFO L225 Difference]: With dead ends: 93 [2021-11-20 22:51:40,251 INFO L226 Difference]: Without dead ends: 93 [2021-11-20 22:51:40,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:40,253 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 10 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:40,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 153 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:51:40,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-20 22:51:40,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2021-11-20 22:51:40,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 40 states have (on average 2.075) internal successors, (83), 79 states have internal predecessors, (83), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:51:40,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2021-11-20 22:51:40,267 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 11 [2021-11-20 22:51:40,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:40,268 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2021-11-20 22:51:40,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 22:51:40,268 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2021-11-20 22:51:40,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 22:51:40,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:40,269 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:40,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 22:51:40,270 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 22:51:40,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:40,270 INFO L85 PathProgramCache]: Analyzing trace with hash 2084442675, now seen corresponding path program 1 times [2021-11-20 22:51:40,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:40,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059669772] [2021-11-20 22:51:40,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:40,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 22:51:40,406 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:40,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059669772] [2021-11-20 22:51:40,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059669772] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:40,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:40,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:51:40,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727352074] [2021-11-20 22:51:40,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:40,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:51:40,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:40,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:51:40,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:51:40,409 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:51:40,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:40,661 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2021-11-20 22:51:40,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:51:40,661 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-20 22:51:40,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:40,665 INFO L225 Difference]: With dead ends: 130 [2021-11-20 22:51:40,671 INFO L226 Difference]: Without dead ends: 130 [2021-11-20 22:51:40,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:51:40,674 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 64 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:40,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 184 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:51:40,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-20 22:51:40,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 82. [2021-11-20 22:51:40,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 40 states have (on average 2.05) internal successors, (82), 78 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:51:40,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-11-20 22:51:40,693 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 19 [2021-11-20 22:51:40,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:40,694 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-11-20 22:51:40,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:51:40,694 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-11-20 22:51:40,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 22:51:40,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:40,696 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:40,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 22:51:40,696 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 22:51:40,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:40,698 INFO L85 PathProgramCache]: Analyzing trace with hash 2084442676, now seen corresponding path program 1 times [2021-11-20 22:51:40,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:40,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870658492] [2021-11-20 22:51:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:40,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:51:40,844 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:40,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870658492] [2021-11-20 22:51:40,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870658492] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:40,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:40,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:51:40,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302713539] [2021-11-20 22:51:40,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:40,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:51:40,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:40,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:51:40,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:51:40,847 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:51:40,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:40,996 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2021-11-20 22:51:40,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:51:40,997 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-20 22:51:40,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:40,998 INFO L225 Difference]: With dead ends: 82 [2021-11-20 22:51:40,998 INFO L226 Difference]: Without dead ends: 82 [2021-11-20 22:51:40,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:51:40,999 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 73 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:41,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 177 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:51:41,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-20 22:51:41,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-11-20 22:51:41,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 40 states have (on average 2.025) internal successors, (81), 77 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:51:41,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2021-11-20 22:51:41,007 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 19 [2021-11-20 22:51:41,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:41,007 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2021-11-20 22:51:41,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:51:41,007 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2021-11-20 22:51:41,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 22:51:41,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:41,008 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:41,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 22:51:41,009 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 22:51:41,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:41,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1694650452, now seen corresponding path program 1 times [2021-11-20 22:51:41,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:41,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670866818] [2021-11-20 22:51:41,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:41,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:41,189 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:41,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670866818] [2021-11-20 22:51:41,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670866818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:51:41,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651576499] [2021-11-20 22:51:41,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:41,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:41,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:41,194 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:51:41,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 22:51:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:41,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 22:51:41,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:41,366 INFO L388 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 [2021-11-20 22:51:41,579 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 22:51:41,579 INFO L388 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 9 [2021-11-20 22:51:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:41,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:51:41,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651576499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:41,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:51:41,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 12 [2021-11-20 22:51:41,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609849771] [2021-11-20 22:51:41,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:41,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 22:51:41,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:41,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 22:51:41,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-20 22:51:41,655 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 11 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:51:41,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:41,975 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2021-11-20 22:51:41,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 22:51:41,976 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-11-20 22:51:41,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:41,977 INFO L225 Difference]: With dead ends: 128 [2021-11-20 22:51:41,978 INFO L226 Difference]: Without dead ends: 128 [2021-11-20 22:51:41,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-11-20 22:51:41,979 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 60 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:41,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 267 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 22:51:41,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-20 22:51:41,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 79. [2021-11-20 22:51:41,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 40 states have (on average 1.975) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:51:42,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2021-11-20 22:51:42,002 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 21 [2021-11-20 22:51:42,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:42,002 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2021-11-20 22:51:42,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:51:42,002 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2021-11-20 22:51:42,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 22:51:42,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:42,003 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:42,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-20 22:51:42,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 22:51:42,204 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 22:51:42,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:42,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1694650453, now seen corresponding path program 1 times [2021-11-20 22:51:42,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:42,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241981816] [2021-11-20 22:51:42,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:42,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:42,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:42,463 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:42,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241981816] [2021-11-20 22:51:42,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241981816] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:51:42,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643345029] [2021-11-20 22:51:42,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:42,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:42,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:42,469 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:51:42,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 22:51:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:42,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 22:51:42,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:42,566 INFO L388 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 [2021-11-20 22:51:42,731 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 22:51:42,732 INFO L388 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 14 [2021-11-20 22:51:42,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:42,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:42,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643345029] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:51:42,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [271470613] [2021-11-20 22:51:42,957 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-20 22:51:42,957 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:51:42,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:51:42,968 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:51:42,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:51:43,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 22 [2021-11-20 22:51:43,195 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-20 22:51:43,195 INFO L388 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 6 case distinctions, treesize of input 35 treesize of output 41 [2021-11-20 22:51:43,255 INFO L388 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 [2021-11-20 22:51:43,263 INFO L388 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 [2021-11-20 22:51:43,311 INFO L388 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 11 treesize of output 7 [2021-11-20 22:51:43,322 INFO L388 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 11 treesize of output 7 [2021-11-20 22:51:43,329 INFO L388 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 15 treesize of output 1 [2021-11-20 22:51:43,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,356 INFO L388 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 21 treesize of output 20 [2021-11-20 22:51:43,374 INFO L388 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 19 treesize of output 1 [2021-11-20 22:51:43,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,386 INFO L388 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 21 treesize of output 20 [2021-11-20 22:51:43,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-20 22:51:43,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-20 22:51:43,463 INFO L388 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 [2021-11-20 22:51:43,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-20 22:51:43,669 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-20 22:51:43,669 INFO L388 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 6 case distinctions, treesize of input 35 treesize of output 41 [2021-11-20 22:51:43,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-20 22:51:44,252 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-20 22:51:44,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 20 [2021-11-20 22:51:44,307 INFO L388 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 7 treesize of output 3 [2021-11-20 22:51:44,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 22:51:44,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-11-20 22:51:44,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 22:51:44,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-11-20 22:51:44,537 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-20 22:51:44,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 20 [2021-11-20 22:51:44,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-11-20 22:51:44,688 INFO L388 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 7 treesize of output 3 [2021-11-20 22:51:44,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-11-20 22:51:44,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 22:51:44,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 22:51:45,032 INFO L388 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 21 [2021-11-20 22:51:45,053 INFO L388 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 23 treesize of output 11 [2021-11-20 22:51:45,067 INFO L388 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 26 treesize of output 21 [2021-11-20 22:51:45,536 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-20 22:51:45,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 20 [2021-11-20 22:51:45,650 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-20 22:51:45,650 INFO L388 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 6 case distinctions, treesize of input 35 treesize of output 41 [2021-11-20 22:51:45,707 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 93 for LOIs [2021-11-20 22:51:47,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:47,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 22:51:47,922 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Some non-self update cases but no top-level DER relation at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:340) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:278) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:264) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-20 22:51:47,927 INFO L158 Benchmark]: Toolchain (without parser) took 9707.94ms. Allocated memory was 98.6MB in the beginning and 148.9MB in the end (delta: 50.3MB). Free memory was 61.0MB in the beginning and 60.8MB in the end (delta: 165.5kB). Peak memory consumption was 49.4MB. Max. memory is 16.1GB. [2021-11-20 22:51:47,927 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 98.6MB. Free memory was 68.2MB in the beginning and 68.2MB in the end (delta: 30.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 22:51:47,928 INFO L158 Benchmark]: CACSL2BoogieTranslator took 448.48ms. Allocated memory is still 98.6MB. Free memory was 60.7MB in the beginning and 64.2MB in the end (delta: -3.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 22:51:47,928 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.92ms. Allocated memory is still 98.6MB. Free memory was 64.2MB in the beginning and 62.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 22:51:47,928 INFO L158 Benchmark]: Boogie Preprocessor took 36.98ms. Allocated memory is still 98.6MB. Free memory was 62.1MB in the beginning and 60.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 22:51:47,929 INFO L158 Benchmark]: RCFGBuilder took 571.44ms. Allocated memory is still 98.6MB. Free memory was 60.3MB in the beginning and 41.9MB in the end (delta: 18.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-11-20 22:51:47,929 INFO L158 Benchmark]: TraceAbstraction took 8577.32ms. Allocated memory was 98.6MB in the beginning and 148.9MB in the end (delta: 50.3MB). Free memory was 41.2MB in the beginning and 60.8MB in the end (delta: -19.6MB). Peak memory consumption was 32.8MB. Max. memory is 16.1GB. [2021-11-20 22:51:47,931 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 98.6MB. Free memory was 68.2MB in the beginning and 68.2MB in the end (delta: 30.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 448.48ms. Allocated memory is still 98.6MB. Free memory was 60.7MB in the beginning and 64.2MB in the end (delta: -3.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 67.92ms. Allocated memory is still 98.6MB. Free memory was 64.2MB in the beginning and 62.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.98ms. Allocated memory is still 98.6MB. Free memory was 62.1MB in the beginning and 60.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 571.44ms. Allocated memory is still 98.6MB. Free memory was 60.3MB in the beginning and 41.9MB in the end (delta: 18.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 8577.32ms. Allocated memory was 98.6MB in the beginning and 148.9MB in the end (delta: 50.3MB). Free memory was 41.2MB in the beginning and 60.8MB in the end (delta: -19.6MB). Peak memory consumption was 32.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Some non-self update cases but no top-level DER relation de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Some non-self update cases but no top-level DER relation: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-20 22:51:47,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P --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 6c2ed91303515fb47ae50633bb4ba0c83e07781b13d03a95e0e32251f9fc3016 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:51:50,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:51:50,291 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:51:50,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:51:50,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:51:50,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:51:50,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:51:50,347 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:51:50,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:51:50,351 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:51:50,352 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:51:50,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:51:50,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:51:50,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:51:50,357 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:51:50,359 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:51:50,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:51:50,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:51:50,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:51:50,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:51:50,367 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:51:50,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:51:50,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:51:50,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:51:50,377 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:51:50,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:51:50,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:51:50,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:51:50,386 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:51:50,387 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:51:50,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:51:50,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:51:50,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:51:50,391 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:51:50,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:51:50,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:51:50,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:51:50,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:51:50,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:51:50,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:51:50,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:51:50,399 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-20 22:51:50,446 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:51:50,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:51:50,447 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:51:50,447 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:51:50,448 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:51:50,449 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:51:50,449 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:51:50,449 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:51:50,449 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:51:50,450 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:51:50,451 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:51:50,451 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:51:50,453 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 22:51:50,453 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 22:51:50,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:51:50,454 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 22:51:50,454 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 22:51:50,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:51:50,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 22:51:50,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:51:50,455 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 22:51:50,455 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 22:51:50,455 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 22:51:50,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:51:50,455 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 22:51:50,456 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 22:51:50,456 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 22:51:50,456 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 22:51:50,456 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:51:50,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:51:50,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 22:51:50,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:51:50,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:51:50,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:51:50,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:51:50,458 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-20 22:51:50,459 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 22:51:50,459 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:51:50,459 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:51:50,459 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c2ed91303515fb47ae50633bb4ba0c83e07781b13d03a95e0e32251f9fc3016 [2021-11-20 22:51:50,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:51:50,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:51:50,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:51:50,902 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:51:50,902 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:51:50,904 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-simple/dll2c_remove_all.i [2021-11-20 22:51:50,965 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/data/f3cf94f3a/34400b60d6054a40885cdb888b9b5bf0/FLAG40bcd9285 [2021-11-20 22:51:51,556 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:51:51,563 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/sv-benchmarks/c/list-simple/dll2c_remove_all.i [2021-11-20 22:51:51,583 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/data/f3cf94f3a/34400b60d6054a40885cdb888b9b5bf0/FLAG40bcd9285 [2021-11-20 22:51:51,802 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/data/f3cf94f3a/34400b60d6054a40885cdb888b9b5bf0 [2021-11-20 22:51:51,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:51:51,808 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:51:51,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:51:51,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:51:51,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:51:51,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:51:51" (1/1) ... [2021-11-20 22:51:51,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2453c0a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:51, skipping insertion in model container [2021-11-20 22:51:51,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:51:51" (1/1) ... [2021-11-20 22:51:51,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:51:51,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:51:52,309 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_390355da-5d32-4606-a429-39508b7fe775/sv-benchmarks/c/list-simple/dll2c_remove_all.i[24169,24182] [2021-11-20 22:51:52,315 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:51:52,335 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:51:52,397 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_390355da-5d32-4606-a429-39508b7fe775/sv-benchmarks/c/list-simple/dll2c_remove_all.i[24169,24182] [2021-11-20 22:51:52,398 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:51:52,435 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:51:52,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:52 WrapperNode [2021-11-20 22:51:52,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:51:52,437 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:51:52,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:51:52,438 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:51:52,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:52" (1/1) ... [2021-11-20 22:51:52,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:52" (1/1) ... [2021-11-20 22:51:52,530 INFO L137 Inliner]: procedures = 129, calls = 38, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 112 [2021-11-20 22:51:52,530 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:51:52,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:51:52,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:51:52,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:51:52,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:52" (1/1) ... [2021-11-20 22:51:52,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:52" (1/1) ... [2021-11-20 22:51:52,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:52" (1/1) ... [2021-11-20 22:51:52,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:52" (1/1) ... [2021-11-20 22:51:52,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:52" (1/1) ... [2021-11-20 22:51:52,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:52" (1/1) ... [2021-11-20 22:51:52,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:52" (1/1) ... [2021-11-20 22:51:52,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:51:52,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:51:52,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:51:52,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:51:52,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:52" (1/1) ... [2021-11-20 22:51:52,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:51:52,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:52,636 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:51:52,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:51:52,672 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-20 22:51:52,672 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-20 22:51:52,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 22:51:52,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:51:52,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 22:51:52,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 22:51:52,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 22:51:52,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 22:51:52,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 22:51:52,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 22:51:52,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 22:51:52,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:51:52,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:51:52,782 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:51:52,794 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:51:53,273 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:51:53,280 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:51:53,280 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 22:51:53,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:51:53 BoogieIcfgContainer [2021-11-20 22:51:53,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:51:53,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:51:53,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:51:53,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:51:53,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:51:51" (1/3) ... [2021-11-20 22:51:53,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@781f9332 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:51:53, skipping insertion in model container [2021-11-20 22:51:53,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:52" (2/3) ... [2021-11-20 22:51:53,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@781f9332 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:51:53, skipping insertion in model container [2021-11-20 22:51:53,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:51:53" (3/3) ... [2021-11-20 22:51:53,291 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_remove_all.i [2021-11-20 22:51:53,296 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:51:53,296 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2021-11-20 22:51:53,341 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:51:53,369 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 22:51:53,369 INFO L340 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2021-11-20 22:51:53,386 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 48 states have (on average 2.125) internal successors, (102), 94 states have internal predecessors, (102), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:51:53,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 22:51:53,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:53,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 22:51:53,394 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 22:51:53,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:53,404 INFO L85 PathProgramCache]: Analyzing trace with hash 893702386, now seen corresponding path program 1 times [2021-11-20 22:51:53,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:51:53,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339580294] [2021-11-20 22:51:53,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:53,419 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:51:53,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:51:53,427 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:51:53,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 22:51:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:53,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 22:51:53,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:53,612 INFO L388 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 [2021-11-20 22:51:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:53,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:53,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:53,674 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:51:53,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339580294] [2021-11-20 22:51:53,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339580294] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:53,676 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:53,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 22:51:53,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52503082] [2021-11-20 22:51:53,680 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:53,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:51:53,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:51:53,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:51:53,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:53,721 INFO L87 Difference]: Start difference. First operand has 98 states, 48 states have (on average 2.125) internal successors, (102), 94 states have internal predecessors, (102), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:53,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:53,973 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2021-11-20 22:51:53,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:51:53,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 22:51:53,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:53,985 INFO L225 Difference]: With dead ends: 95 [2021-11-20 22:51:53,987 INFO L226 Difference]: Without dead ends: 92 [2021-11-20 22:51:53,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:53,993 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 10 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:53,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 136 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:51:54,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-20 22:51:54,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-11-20 22:51:54,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 46 states have (on average 2.0) internal successors, (92), 88 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:51:54,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2021-11-20 22:51:54,050 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 6 [2021-11-20 22:51:54,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:54,051 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2021-11-20 22:51:54,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:54,052 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2021-11-20 22:51:54,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 22:51:54,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:54,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 22:51:54,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:54,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:51:54,268 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 22:51:54,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:54,270 INFO L85 PathProgramCache]: Analyzing trace with hash 893702387, now seen corresponding path program 1 times [2021-11-20 22:51:54,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:51:54,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94667449] [2021-11-20 22:51:54,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:54,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:51:54,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:51:54,276 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:51:54,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 22:51:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:54,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:51:54,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:54,376 INFO L388 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 [2021-11-20 22:51:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:54,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:54,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:51:54,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94667449] [2021-11-20 22:51:54,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94667449] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:54,532 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:54,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-20 22:51:54,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988879647] [2021-11-20 22:51:54,533 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:54,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:51:54,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:51:54,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:51:54,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:51:54,535 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:55,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:55,043 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2021-11-20 22:51:55,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:51:55,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 22:51:55,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:55,046 INFO L225 Difference]: With dead ends: 89 [2021-11-20 22:51:55,046 INFO L226 Difference]: Without dead ends: 89 [2021-11-20 22:51:55,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:51:55,047 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 5 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:55,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 188 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 22:51:55,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-20 22:51:55,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-20 22:51:55,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 46 states have (on average 1.934782608695652) internal successors, (89), 85 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:51:55,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2021-11-20 22:51:55,057 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 6 [2021-11-20 22:51:55,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:55,057 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2021-11-20 22:51:55,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:55,058 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2021-11-20 22:51:55,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 22:51:55,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:55,059 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:55,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:55,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:51:55,269 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 22:51:55,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:55,270 INFO L85 PathProgramCache]: Analyzing trace with hash -413883200, now seen corresponding path program 1 times [2021-11-20 22:51:55,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:51:55,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234827935] [2021-11-20 22:51:55,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:55,271 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:51:55,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:51:55,272 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:51:55,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 22:51:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:55,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 22:51:55,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:55,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:55,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:55,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:51:55,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234827935] [2021-11-20 22:51:55,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234827935] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:55,440 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:55,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 22:51:55,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714920385] [2021-11-20 22:51:55,440 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:55,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:51:55,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:51:55,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:51:55,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:51:55,442 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:51:55,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:55,461 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2021-11-20 22:51:55,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:51:55,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2021-11-20 22:51:55,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:55,463 INFO L225 Difference]: With dead ends: 100 [2021-11-20 22:51:55,464 INFO L226 Difference]: Without dead ends: 100 [2021-11-20 22:51:55,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:51:55,465 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 29 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:55,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 178 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:51:55,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-20 22:51:55,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2021-11-20 22:51:55,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 86 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:51:55,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2021-11-20 22:51:55,478 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 14 [2021-11-20 22:51:55,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:55,478 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2021-11-20 22:51:55,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:51:55,479 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2021-11-20 22:51:55,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 22:51:55,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:55,480 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:55,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:55,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:51:55,691 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 22:51:55,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:55,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1410538016, now seen corresponding path program 1 times [2021-11-20 22:51:55,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:51:55,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572295361] [2021-11-20 22:51:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:55,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:51:55,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:51:55,694 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:51:55,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 22:51:55,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:55,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 22:51:55,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:55,824 INFO L388 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 [2021-11-20 22:51:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:51:55,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:56,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:51:56,037 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:51:56,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572295361] [2021-11-20 22:51:56,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572295361] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:56,037 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:56,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 22:51:56,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722292786] [2021-11-20 22:51:56,038 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:56,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:51:56,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:51:56,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:51:56,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:51:56,040 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:51:56,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:56,648 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2021-11-20 22:51:56,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:51:56,648 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-11-20 22:51:56,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:56,651 INFO L225 Difference]: With dead ends: 139 [2021-11-20 22:51:56,651 INFO L226 Difference]: Without dead ends: 139 [2021-11-20 22:51:56,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:51:56,653 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 68 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:56,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 216 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 22:51:56,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-20 22:51:56,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 89. [2021-11-20 22:51:56,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 85 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:51:56,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2021-11-20 22:51:56,668 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 24 [2021-11-20 22:51:56,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:56,669 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2021-11-20 22:51:56,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:51:56,669 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2021-11-20 22:51:56,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 22:51:56,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:56,670 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:56,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:56,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:51:56,871 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 22:51:56,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:56,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1410538017, now seen corresponding path program 1 times [2021-11-20 22:51:56,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:51:56,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575549597] [2021-11-20 22:51:56,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:56,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:51:56,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:51:56,873 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:51:56,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 22:51:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:56,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 22:51:56,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:57,007 INFO L388 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 [2021-11-20 22:51:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:51:57,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:57,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:51:57,534 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:51:57,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575549597] [2021-11-20 22:51:57,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575549597] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:57,535 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:57,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-20 22:51:57,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450091949] [2021-11-20 22:51:57,536 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:57,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 22:51:57,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:51:57,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 22:51:57,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 22:51:57,538 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 22:51:58,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:58,344 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2021-11-20 22:51:58,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:51:58,345 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-11-20 22:51:58,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:58,346 INFO L225 Difference]: With dead ends: 89 [2021-11-20 22:51:58,346 INFO L226 Difference]: Without dead ends: 89 [2021-11-20 22:51:58,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 22:51:58,348 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 80 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:58,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 260 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 22:51:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-20 22:51:58,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-11-20 22:51:58,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 47 states have (on average 1.872340425531915) internal successors, (88), 84 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:51:58,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2021-11-20 22:51:58,356 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 24 [2021-11-20 22:51:58,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:58,356 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2021-11-20 22:51:58,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 22:51:58,357 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2021-11-20 22:51:58,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 22:51:58,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:58,358 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:58,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:58,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:51:58,566 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 22:51:58,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:58,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1682632447, now seen corresponding path program 1 times [2021-11-20 22:51:58,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:51:58,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187185170] [2021-11-20 22:51:58,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:58,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:51:58,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:51:58,569 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:51:58,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 22:51:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:58,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 22:51:58,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:58,692 INFO L388 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 [2021-11-20 22:51:58,934 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 22:51:58,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-11-20 22:51:59,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:59,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:23,862 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:52:23,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187185170] [2021-11-20 22:52:23,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187185170] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:52:23,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [438453989] [2021-11-20 22:52:23,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:23,863 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 22:52:23,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 22:52:23,873 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 22:52:23,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-20 22:52:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:24,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 22:52:24,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:24,054 INFO L388 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 [2021-11-20 22:52:28,194 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-20 22:52:28,194 INFO L388 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 22 treesize of output 27 [2021-11-20 22:52:28,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:28,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:36,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:36,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [438453989] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 22:52:36,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:52:36,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8, 6] total 18 [2021-11-20 22:52:36,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525352421] [2021-11-20 22:52:36,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:36,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 22:52:36,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:52:36,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 22:52:36,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=271, Unknown=12, NotChecked=0, Total=342 [2021-11-20 22:52:36,693 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:52:39,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:39,402 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2021-11-20 22:52:39,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 22:52:39,403 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-11-20 22:52:39,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:39,405 INFO L225 Difference]: With dead ends: 144 [2021-11-20 22:52:39,405 INFO L226 Difference]: Without dead ends: 144 [2021-11-20 22:52:39,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=69, Invalid=298, Unknown=13, NotChecked=0, Total=380 [2021-11-20 22:52:39,406 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 55 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:39,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 329 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 400 Invalid, 0 Unknown, 32 Unchecked, 0.7s Time] [2021-11-20 22:52:39,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-20 22:52:39,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 93. [2021-11-20 22:52:39,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 88 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 22:52:39,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2021-11-20 22:52:39,416 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 26 [2021-11-20 22:52:39,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:39,416 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2021-11-20 22:52:39,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:52:39,417 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2021-11-20 22:52:39,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 22:52:39,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:39,418 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:39,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 22:52:39,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-20 22:52:39,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 22:52:39,830 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 22:52:39,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:39,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1682632446, now seen corresponding path program 1 times [2021-11-20 22:52:39,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:52:39,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436261888] [2021-11-20 22:52:39,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:39,831 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:52:39,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:52:39,833 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:52:39,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 22:52:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:39,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 22:52:39,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:39,949 INFO L388 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 [2021-11-20 22:52:39,954 INFO L388 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 [2021-11-20 22:52:40,264 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 22:52:40,265 INFO L388 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 29 treesize of output 31 [2021-11-20 22:52:40,274 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:52:40,275 INFO L388 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 28 treesize of output 28 [2021-11-20 22:52:40,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:40,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:53:02,201 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_52| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_6| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_52|)))) (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (and (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse0) (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_52| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_6|)))) (exists ((|v_node_create_~temp~0#1.base_51| (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule .cse1 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_51| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_6|))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse1)))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_51|)))))))) is different from false [2021-11-20 22:53:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:53:10,130 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:53:10,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436261888] [2021-11-20 22:53:10,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436261888] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:53:10,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1439529317] [2021-11-20 22:53:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:10,130 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 22:53:10,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 22:53:10,131 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 22:53:10,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-20 22:53:10,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:10,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 22:53:10,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:10,326 INFO L388 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 [2021-11-20 22:53:10,332 INFO L388 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 [2021-11-20 22:53:10,624 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 22:53:10,624 INFO L388 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 32 treesize of output 34 [2021-11-20 22:53:10,641 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:53:10,642 INFO L388 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 31 [2021-11-20 22:53:10,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:53:10,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:53:15,395 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (exists ((|v_node_create_~temp~0#1.base_51| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_51|))))) (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_4|))) (or (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_4|) .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_51| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_8|))))))) (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_4|))) (and (bvule .cse1 (select |c_#length| |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_8|)) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_4|) .cse1))))) is different from false [2021-11-20 22:53:19,870 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_8| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_60| (_ BitVec 32))) (or (exists ((|v_node_create_~temp~0#1.base_51| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_51|))))) (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_4|))) (or (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_4|) .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_51| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_8|))))))) (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_4|))) (and (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_60| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_8|)) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_4|) .cse1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_60|)))))) is different from false [2021-11-20 22:53:21,884 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_8| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_60| (_ BitVec 32))) (or (exists ((|v_node_create_~temp~0#1.base_51| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_51|))))) (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_4|))) (or (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_4|) .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_51| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_8|))))))) (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_4|))) (and (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_60| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_8|)) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_4|) .cse1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_60|)))))) is different from true [2021-11-20 22:53:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-11-20 22:53:22,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1439529317] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:53:22,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863572515] [2021-11-20 22:53:22,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:22,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:53:22,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:53:22,311 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:53:22,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 22:53:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:22,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 22:53:22,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:22,422 INFO L388 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 [2021-11-20 22:53:22,430 INFO L388 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 [2021-11-20 22:53:22,697 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 22:53:22,698 INFO L388 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 30 treesize of output 32 [2021-11-20 22:53:22,711 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:53:22,712 INFO L388 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 29 treesize of output 29 [2021-11-20 22:53:22,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:53:22,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:53:40,178 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_68| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_6| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_68|)))))) (exists ((|v_node_create_~temp~0#1.base_51| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_51|))))) (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_51| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_10|))))))) (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (and (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse1) (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_68| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_10|)))))) is different from false [2021-11-20 22:53:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:53:40,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863572515] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:53:40,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 22:53:40,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 19 [2021-11-20 22:53:40,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974859146] [2021-11-20 22:53:40,614 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 22:53:40,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 22:53:40,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:53:40,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 22:53:40,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=191, Unknown=18, NotChecked=124, Total=380 [2021-11-20 22:53:40,616 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 14 states have internal predecessors, (56), 3 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 22:53:47,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:47,583 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2021-11-20 22:53:47,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 22:53:47,584 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 14 states have internal predecessors, (56), 3 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 26 [2021-11-20 22:53:47,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:47,585 INFO L225 Difference]: With dead ends: 93 [2021-11-20 22:53:47,586 INFO L226 Difference]: Without dead ends: 93 [2021-11-20 22:53:47,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 128 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 55.6s TimeCoverageRelationStatistics Valid=61, Invalid=242, Unknown=19, NotChecked=140, Total=462 [2021-11-20 22:53:47,587 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 63 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 679 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:47,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 388 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 261 Invalid, 0 Unknown, 679 Unchecked, 0.8s Time] [2021-11-20 22:53:47,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-20 22:53:47,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-11-20 22:53:47,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 88 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 22:53:47,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2021-11-20 22:53:47,595 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 26 [2021-11-20 22:53:47,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:47,596 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2021-11-20 22:53:47,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 14 states have internal predecessors, (56), 3 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 22:53:47,596 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2021-11-20 22:53:47,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 22:53:47,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:47,598 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:47,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-20 22:53:47,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-20 22:53:48,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 22:53:48,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:53:48,201 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 22:53:48,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:48,201 INFO L85 PathProgramCache]: Analyzing trace with hash -2101924137, now seen corresponding path program 1 times [2021-11-20 22:53:48,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:53:48,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917821870] [2021-11-20 22:53:48,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:48,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:53:48,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:53:48,203 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:53:48,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 22:53:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:48,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 22:53:48,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:48,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:53:48,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:53:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:53:48,465 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:53:48,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917821870] [2021-11-20 22:53:48,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917821870] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:53:48,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1973705847] [2021-11-20 22:53:48,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:48,468 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 22:53:48,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 22:53:48,471 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 22:53:48,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-20 22:53:48,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:48,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 22:53:48,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:53:48,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:53:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:53:48,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1973705847] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:53:48,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714240923] [2021-11-20 22:53:48,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:48,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:53:48,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:53:48,716 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:53:48,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 22:53:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:48,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 22:53:48,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:53:48,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:53:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:53:48,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714240923] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:53:48,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 22:53:48,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 6 [2021-11-20 22:53:48,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499547505] [2021-11-20 22:53:48,981 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 22:53:48,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:53:48,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:53:48,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:53:48,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:53:48,983 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:53:49,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:49,183 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-11-20 22:53:49,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:53:49,184 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-11-20 22:53:49,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:49,185 INFO L225 Difference]: With dead ends: 94 [2021-11-20 22:53:49,185 INFO L226 Difference]: Without dead ends: 94 [2021-11-20 22:53:49,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:53:49,186 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 4 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:49,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 399 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:53:49,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-20 22:53:49,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-11-20 22:53:49,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 51 states have (on average 1.803921568627451) internal successors, (92), 88 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 22:53:49,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2021-11-20 22:53:49,193 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 28 [2021-11-20 22:53:49,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:49,193 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2021-11-20 22:53:49,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:53:49,194 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2021-11-20 22:53:49,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 22:53:49,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:49,195 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:49,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 22:53:49,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 22:53:49,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-20 22:53:49,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 22:53:49,802 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 22:53:49,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:49,802 INFO L85 PathProgramCache]: Analyzing trace with hash -739919470, now seen corresponding path program 1 times [2021-11-20 22:53:49,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:53:49,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548683523] [2021-11-20 22:53:49,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:49,803 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:53:49,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:53:49,804 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:53:49,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 22:53:49,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:49,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:53:49,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 22:53:49,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:53:50,026 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 22:53:50,027 INFO L388 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 [2021-11-20 22:53:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 22:53:50,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:53:50,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548683523] [2021-11-20 22:53:50,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548683523] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:53:50,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [548158442] [2021-11-20 22:53:50,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:50,086 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 22:53:50,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 22:53:50,089 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 22:53:50,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-20 22:53:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:50,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 22:53:50,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 22:53:50,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:53:50,360 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 22:53:50,360 INFO L388 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 [2021-11-20 22:53:50,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 22:53:50,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [548158442] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:53:50,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224101778] [2021-11-20 22:53:50,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:50,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:53:50,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:53:50,441 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:53:50,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 22:53:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:50,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:53:50,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 22:53:50,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:53:50,594 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 22:53:50,595 INFO L388 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 [2021-11-20 22:53:50,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 22:53:50,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224101778] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:53:50,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 22:53:50,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2021-11-20 22:53:50,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108397125] [2021-11-20 22:53:50,645 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 22:53:50,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:53:50,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:53:50,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:53:50,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:53:50,646 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:53:50,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:50,974 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2021-11-20 22:53:50,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:53:50,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-11-20 22:53:50,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:50,976 INFO L225 Difference]: With dead ends: 147 [2021-11-20 22:53:50,976 INFO L226 Difference]: Without dead ends: 147 [2021-11-20 22:53:50,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 163 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:53:50,977 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 57 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:50,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 156 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 22:53:50,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-20 22:53:50,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 96. [2021-11-20 22:53:50,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 54 states have (on average 1.7962962962962963) internal successors, (97), 91 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 22:53:50,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2021-11-20 22:53:50,984 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 29 [2021-11-20 22:53:50,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:50,985 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2021-11-20 22:53:50,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:53:50,985 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2021-11-20 22:53:50,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 22:53:50,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:50,987 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:50,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-20 22:53:51,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-20 22:53:51,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 22:53:51,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:53:51,595 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 22:53:51,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:51,595 INFO L85 PathProgramCache]: Analyzing trace with hash -739919469, now seen corresponding path program 1 times [2021-11-20 22:53:51,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:53:51,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245048785] [2021-11-20 22:53:51,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:51,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:53:51,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:53:51,597 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:53:51,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 22:53:51,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:51,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 22:53:51,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:51,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:53:51,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:53:51,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:53:51,965 INFO L388 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 22 treesize of output 26 [2021-11-20 22:53:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:53:52,561 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:53:52,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245048785] [2021-11-20 22:53:52,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245048785] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:53:52,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [942946178] [2021-11-20 22:53:52,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:52,562 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 22:53:52,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 22:53:52,563 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 22:53:52,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-20 22:53:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:52,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 22:53:52,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:53:52,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:53:52,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:53:52,955 INFO L388 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 22 treesize of output 26 [2021-11-20 22:53:53,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:53:53,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [942946178] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:53:53,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953126326] [2021-11-20 22:53:53,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:53,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:53:53,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:53:53,413 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:53:53,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 22:53:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:53,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 22:53:53,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:53,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:53:53,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:53:53,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:53:53,732 INFO L388 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 22 treesize of output 26 [2021-11-20 22:53:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:53:54,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953126326] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:53:54,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 22:53:54,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2021-11-20 22:53:54,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832209949] [2021-11-20 22:53:54,154 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 22:53:54,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 22:53:54,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:53:54,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 22:53:54,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-20 22:53:54,155 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 22:53:55,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:55,713 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2021-11-20 22:53:55,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 22:53:55,714 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2021-11-20 22:53:55,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:55,715 INFO L225 Difference]: With dead ends: 160 [2021-11-20 22:53:55,715 INFO L226 Difference]: Without dead ends: 160 [2021-11-20 22:53:55,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-20 22:53:55,716 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 133 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:55,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 499 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 22:53:55,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-20 22:53:55,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 96. [2021-11-20 22:53:55,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 91 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 22:53:55,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2021-11-20 22:53:55,722 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 29 [2021-11-20 22:53:55,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:55,723 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2021-11-20 22:53:55,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 22:53:55,723 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2021-11-20 22:53:55,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 22:53:55,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:55,725 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:55,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-20 22:53:55,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 22:53:56,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-20 22:53:56,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 22:53:56,336 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 22:53:56,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:56,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1462667085, now seen corresponding path program 1 times [2021-11-20 22:53:56,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:53:56,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1765178797] [2021-11-20 22:53:56,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:56,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:53:56,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:53:56,338 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:53:56,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-20 22:53:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:56,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 22:53:56,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:56,445 INFO L388 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 [2021-11-20 22:53:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:53:56,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:53:56,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:53:56,686 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:53:56,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1765178797] [2021-11-20 22:53:56,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1765178797] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:56,686 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:56,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-20 22:53:56,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192758640] [2021-11-20 22:53:56,687 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:56,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 22:53:56,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:53:56,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 22:53:56,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:53:56,688 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:53:57,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:57,366 INFO L93 Difference]: Finished difference Result 145 states and 153 transitions. [2021-11-20 22:53:57,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:53:57,367 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-11-20 22:53:57,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:57,368 INFO L225 Difference]: With dead ends: 145 [2021-11-20 22:53:57,368 INFO L226 Difference]: Without dead ends: 145 [2021-11-20 22:53:57,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 22:53:57,370 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 118 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:57,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 241 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 22:53:57,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-20 22:53:57,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 95. [2021-11-20 22:53:57,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 54 states have (on average 1.7592592592592593) internal successors, (95), 90 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 22:53:57,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2021-11-20 22:53:57,374 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 30 [2021-11-20 22:53:57,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:57,374 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2021-11-20 22:53:57,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:53:57,375 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2021-11-20 22:53:57,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 22:53:57,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:57,376 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:57,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-20 22:53:57,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:53:57,577 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 22:53:57,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:57,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1462667084, now seen corresponding path program 1 times [2021-11-20 22:53:57,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:53:57,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500799868] [2021-11-20 22:53:57,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:57,578 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:53:57,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:53:57,580 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:53:57,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-20 22:53:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:57,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 22:53:57,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:57,715 INFO L388 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 [2021-11-20 22:53:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:53:57,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:53:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:53:58,479 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:53:58,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500799868] [2021-11-20 22:53:58,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500799868] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:58,479 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:58,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-20 22:53:58,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007979244] [2021-11-20 22:53:58,480 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:58,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 22:53:58,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:53:58,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 22:53:58,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-20 22:53:58,481 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 22:53:59,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:59,563 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2021-11-20 22:53:59,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 22:53:59,564 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2021-11-20 22:53:59,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:59,565 INFO L225 Difference]: With dead ends: 95 [2021-11-20 22:53:59,565 INFO L226 Difference]: Without dead ends: 95 [2021-11-20 22:53:59,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-20 22:53:59,565 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 203 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:59,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 253 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 22:53:59,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-20 22:53:59,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2021-11-20 22:53:59,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 54 states have (on average 1.7407407407407407) internal successors, (94), 89 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 22:53:59,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2021-11-20 22:53:59,569 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 30 [2021-11-20 22:53:59,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:59,569 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2021-11-20 22:53:59,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 22:53:59,569 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2021-11-20 22:53:59,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 22:53:59,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:59,570 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:59,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-20 22:53:59,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:53:59,773 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 22:53:59,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:59,774 INFO L85 PathProgramCache]: Analyzing trace with hash 2100539926, now seen corresponding path program 1 times [2021-11-20 22:53:59,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:53:59,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863340832] [2021-11-20 22:53:59,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:59,775 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:53:59,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:53:59,779 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:53:59,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-20 22:53:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:59,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 22:53:59,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:59,938 INFO L388 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 [2021-11-20 22:54:00,043 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 22:54:00,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-11-20 22:54:00,230 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-20 22:54:00,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 52 [2021-11-20 22:54:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 22:54:00,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:54:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 7 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:54:21,959 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:54:21,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863340832] [2021-11-20 22:54:21,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863340832] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:54:21,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [136505909] [2021-11-20 22:54:21,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:21,960 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 22:54:21,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 22:54:21,961 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 22:54:21,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-20 22:54:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:22,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 22:54:22,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:54:22,224 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-20 22:54:22,225 INFO L388 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 19 [2021-11-20 22:54:22,299 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:54:22,300 INFO L388 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 22 treesize of output 18 [2021-11-20 22:54:26,541 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-20 22:54:26,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 40 [2021-11-20 22:54:26,770 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 22:54:26,771 INFO L388 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 47 treesize of output 41 [2021-11-20 22:54:31,070 INFO L354 Elim1Store]: treesize reduction 57, result has 30.5 percent of original size [2021-11-20 22:54:31,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 79 [2021-11-20 22:54:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 22:54:32,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:54:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:54:53,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [136505909] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 22:54:53,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:54:53,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 8] total 23 [2021-11-20 22:54:53,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829904294] [2021-11-20 22:54:53,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:54:53,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 22:54:53,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:54:53,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 22:54:53,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=432, Unknown=17, NotChecked=0, Total=552 [2021-11-20 22:54:53,549 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:54:54,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:54,091 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2021-11-20 22:54:54,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 22:54:54,091 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2021-11-20 22:54:54,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:54,092 INFO L225 Difference]: With dead ends: 133 [2021-11-20 22:54:54,092 INFO L226 Difference]: Without dead ends: 133 [2021-11-20 22:54:54,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 48.8s TimeCoverageRelationStatistics Valid=109, Invalid=474, Unknown=17, NotChecked=0, Total=600 [2021-11-20 22:54:54,094 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 135 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:54,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 150 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 94 Invalid, 0 Unknown, 124 Unchecked, 0.4s Time] [2021-11-20 22:54:54,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-20 22:54:54,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 93. [2021-11-20 22:54:54,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 88 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 22:54:54,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2021-11-20 22:54:54,099 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 34 [2021-11-20 22:54:54,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:54,099 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2021-11-20 22:54:54,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:54:54,100 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2021-11-20 22:54:54,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 22:54:54,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:54,101 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:54:54,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-20 22:54:54,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-20 22:54:54,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:54:54,504 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 22:54:54,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:54,504 INFO L85 PathProgramCache]: Analyzing trace with hash 2100539927, now seen corresponding path program 1 times [2021-11-20 22:54:54,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:54:54,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205805966] [2021-11-20 22:54:54,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:54,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:54:54,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:54:54,505 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:54:54,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-20 22:54:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:54,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 22:54:54,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:54:54,653 INFO L388 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 [2021-11-20 22:54:54,662 INFO L388 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 [2021-11-20 22:54:54,900 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 22:54:54,900 INFO L388 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 28 treesize of output 30 [2021-11-20 22:54:54,908 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:54:54,909 INFO L388 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 27 treesize of output 23 [2021-11-20 22:54:55,262 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-20 22:54:55,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 30 [2021-11-20 22:54:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:54:56,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:55:05,892 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_169| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (_ BitVec 32))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|))) (or (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_169| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|)) (exists ((|v_node_create_~temp~0#1.base_168| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_168| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|)))) (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| .cse0))))) is different from false [2021-11-20 22:55:14,662 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12| (_ BitVec 32))) (or (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|)) (forall ((|v_node_create_~temp~0#1.base_168| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|) (select (store |c_#length| |v_node_create_~temp~0#1.base_168| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12|)))) (exists ((|v_node_create_~temp~0#1.base_172| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_172|)))) (or (exists ((|v_node_create_~temp~0#1.base_168| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|) (select (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_172| (_ bv12 32)) |v_node_create_~temp~0#1.base_168| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12|)))) (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|)))))))) is different from false [2021-11-20 22:55:20,093 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_173| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_173|)))))) (exists ((|v_node_create_~temp~0#1.base_172| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_172|)))) (or (exists ((|v_node_create_~temp~0#1.base_168| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|) (select (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_172| (_ bv12 32)) |v_node_create_~temp~0#1.base_168| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12|)))) (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|)))))) (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|)) (forall ((|v_node_create_~temp~0#1.base_168| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|) (select (store (store |c_#length| |v_node_create_~temp~0#1.base_173| (_ bv12 32)) |v_node_create_~temp~0#1.base_168| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12|)))))) is different from false [2021-11-20 22:55:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2021-11-20 22:55:20,139 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:55:20,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205805966] [2021-11-20 22:55:20,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205805966] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:55:20,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [60954393] [2021-11-20 22:55:20,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:20,140 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 22:55:20,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 22:55:20,141 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 22:55:20,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-20 22:55:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:20,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 22:55:20,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:55:20,388 INFO L388 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 [2021-11-20 22:55:20,487 INFO L388 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 9 treesize of output 7 [2021-11-20 22:55:20,841 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 22:55:20,841 INFO L388 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 15 treesize of output 17 [2021-11-20 22:55:21,177 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:55:21,178 INFO L388 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 17 treesize of output 13 [2021-11-20 22:55:21,610 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 22:55:21,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 37 [2021-11-20 22:55:23,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 22:55:23,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:56:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 7 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:56:16,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [60954393] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:56:16,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815830674] [2021-11-20 22:56:16,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:16,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:56:16,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:56:16,121 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:56:16,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 22:56:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:16,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 22:56:16,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:56:16,237 INFO L388 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 [2021-11-20 22:56:16,253 INFO L388 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 [2021-11-20 22:56:16,643 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 22:56:16,644 INFO L388 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 34 treesize of output 36 [2021-11-20 22:56:16,674 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-20 22:56:16,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 36 [2021-11-20 22:56:17,611 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 22:56:17,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 59 [2021-11-20 22:56:17,640 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-20 22:56:17,640 INFO L388 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 53 treesize of output 51 [2021-11-20 22:56:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:56:19,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:56:31,482 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85|))))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))))))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse1) (bvule .cse1 (select |c_#length| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|)))))) is different from false [2021-11-20 22:56:36,503 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_186| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85|))))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))))))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (and (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_186| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|)) (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_186|)))))) is different from false [2021-11-20 22:56:38,530 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_186| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85|))))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))))))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (and (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_186| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|)) (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_186|)))))) is different from true [2021-11-20 22:56:46,123 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_189| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_189|))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| .cse0)) (not (bvule .cse0 (select (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_189| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_189| (_ bv1 1)) |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85|))))))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85|))))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|))) (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| .cse1) (bvule .cse1 (select (store |c_#length| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20|)))))) is different from false [2021-11-20 22:57:25,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2021-11-20 22:57:25,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815830674] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:57:25,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 22:57:25,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 11, 9] total 43 [2021-11-20 22:57:25,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384245817] [2021-11-20 22:57:25,012 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 22:57:25,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-20 22:57:25,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:57:25,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-20 22:57:25,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1174, Unknown=38, NotChecked=462, Total=1892 [2021-11-20 22:57:25,015 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 44 states, 39 states have (on average 3.6923076923076925) internal successors, (144), 33 states have internal predecessors, (144), 10 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-20 22:57:53,818 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_189| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_189|))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| .cse0)) (not (bvule .cse0 (select (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_189| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_189| (_ bv1 1)) |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85|))))))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85|))))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|))) (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| .cse1) (bvule .cse1 (select (store |c_#length| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20|)))))) (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12| (_ BitVec 32))) (or (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|)) (forall ((|v_node_create_~temp~0#1.base_168| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|) (select (store |c_#length| |v_node_create_~temp~0#1.base_168| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12|)))) (exists ((|v_node_create_~temp~0#1.base_172| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_172|)))) (or (exists ((|v_node_create_~temp~0#1.base_168| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|) (select (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_172| (_ bv12 32)) |v_node_create_~temp~0#1.base_168| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12|)))) (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|)))))))) (= |c_#length| (store |c_old(#length)| |c_node_create_~temp~0#1.base| (_ bv12 32))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |c_node_create_~temp~0#1.base|)))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv12 32))) (bvult |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv12 32))) (= (store |c_old(#valid)| |node_create_~temp~0#1.base| (_ bv1 1)) |c_#valid|) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |node_create_~temp~0#1.base|)))))) is different from false [2021-11-20 22:57:55,855 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_189| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_189|))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| .cse0)) (not (bvule .cse0 (select (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_189| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_189| (_ bv1 1)) |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85|))))))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85|))))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|))) (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| .cse1) (bvule .cse1 (select (store |c_#length| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20|)))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |c_node_create_#res#1.base|)))) (= |c_#length| (store |c_old(#length)| |c_node_create_#res#1.base| (_ bv12 32))) (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12| (_ BitVec 32))) (or (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|)) (forall ((|v_node_create_~temp~0#1.base_168| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|) (select (store |c_#length| |v_node_create_~temp~0#1.base_168| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12|)))) (exists ((|v_node_create_~temp~0#1.base_172| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_172|)))) (or (exists ((|v_node_create_~temp~0#1.base_168| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|) (select (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_172| (_ bv12 32)) |v_node_create_~temp~0#1.base_168| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12|)))) (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|)))))))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv12 32))) (bvult |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv12 32))) (= (store |c_old(#valid)| |node_create_~temp~0#1.base| (_ bv1 1)) |c_#valid|) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |node_create_~temp~0#1.base|)))))) is different from false [2021-11-20 22:58:30,583 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_189| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_189|))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| .cse0)) (not (bvule .cse0 (select (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_189| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_189| (_ bv1 1)) |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85|))))))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85|))))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|))) (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| .cse1) (bvule .cse1 (select (store |c_#length| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20|)))))) (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85|))))) (let ((.cse2 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse2)) (not (bvule .cse2 (select (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))))))) (let ((.cse3 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse3) (bvule .cse3 (select |c_#length| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|)))))) (= |c_#length| (store |c_old(#length)| |c_node_create_~temp~0#1.base| (_ bv12 32))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |c_node_create_~temp~0#1.base|)))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv12 32))) (bvult |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv12 32))) (= (store |c_old(#valid)| |node_create_~temp~0#1.base| (_ bv1 1)) |c_#valid|) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |node_create_~temp~0#1.base|)))))) is different from false [2021-11-20 22:58:32,608 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_189| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_189|))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| .cse0)) (not (bvule .cse0 (select (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_189| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_189| (_ bv1 1)) |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85|))))))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85|))))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|))) (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| .cse1) (bvule .cse1 (select (store |c_#length| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20|)))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |c_node_create_#res#1.base|)))) (= |c_#length| (store |c_old(#length)| |c_node_create_#res#1.base| (_ bv12 32))) (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85|))))) (let ((.cse2 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse2)) (not (bvule .cse2 (select (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))))))) (let ((.cse3 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse3) (bvule .cse3 (select |c_#length| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|)))))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv12 32))) (bvult |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv12 32))) (= (store |c_old(#valid)| |node_create_~temp~0#1.base| (_ bv1 1)) |c_#valid|) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |node_create_~temp~0#1.base|)))))) is different from false [2021-11-20 22:58:35,443 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_node_create_~temp~0#1.base_169| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (_ BitVec 32))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|))) (or (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_169| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|)) (exists ((|v_node_create_~temp~0#1.base_168| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_168| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|)))) (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| .cse0))))) (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_186| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85|))))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))))))) (let ((.cse2 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (and (bvule .cse2 (select (store |c_#length| |v_node_create_~temp~0#1.base_186| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|)) (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse2))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_186|)))))) (= |c_#length| |c_old(#length)|)) is different from false [2021-11-20 22:59:12,240 WARN L227 SmtUtils]: Spent 7.97s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 22:59:51,002 WARN L227 SmtUtils]: Spent 10.21s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 22:59:53,603 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_node_create_~temp~0#1.base_169| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (_ BitVec 32))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|))) (or (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_169| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|)) (exists ((|v_node_create_~temp~0#1.base_168| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_168| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|)))) (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| .cse0))))) (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_186| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85|))))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))))))) (let ((.cse2 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (and (bvule .cse2 (select (store |c_#length| |v_node_create_~temp~0#1.base_186| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|)) (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse2))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_186|)))))) (forall ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_15| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_7| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_178| (_ BitVec 32))) (or (let ((.cse3 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_7|))) (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_7| .cse3) (bvule .cse3 (select (store |c_#length| |v_node_create_~temp~0#1.base_178| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_15|)))) (not (bvult |v_node_create_~temp~0#1.base_178| |c_#StackHeapBarrier|)) (exists ((|v_node_create_~temp~0#1.base_177| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_177| |c_#StackHeapBarrier|) (let ((.cse4 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_7|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_7| .cse4)) (not (bvule .cse4 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_177| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_15|)))))))))) is different from false [2021-11-20 22:59:55,659 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_15| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_7| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_7|))) (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_7| .cse0) (bvule .cse0 (select |c_#length| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_15|)))) (exists ((|v_node_create_~temp~0#1.base_177| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_177| |c_#StackHeapBarrier|) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_7|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_7| .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_177| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_15|))))))))) (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85|))))) (let ((.cse2 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse2)) (not (bvule .cse2 (select (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_85| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))))))) (let ((.cse3 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse3) (bvule .cse3 (select |c_#length| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))))))) is different from false [2021-11-20 22:59:55,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:59:55,793 INFO L93 Difference]: Finished difference Result 165 states and 185 transitions. [2021-11-20 22:59:55,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 22:59:55,795 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 3.6923076923076925) internal successors, (144), 33 states have internal predecessors, (144), 10 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 34 [2021-11-20 22:59:55,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:59:55,796 INFO L225 Difference]: With dead ends: 165 [2021-11-20 22:59:55,796 INFO L226 Difference]: Without dead ends: 165 [2021-11-20 22:59:55,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 255.0s TimeCoverageRelationStatistics Valid=341, Invalid=1879, Unknown=88, NotChecked=1352, Total=3660 [2021-11-20 22:59:55,800 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 75 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 869 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:59:55,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 775 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 57 Invalid, 0 Unknown, 869 Unchecked, 0.3s Time] [2021-11-20 22:59:55,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-20 22:59:55,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 140. [2021-11-20 22:59:55,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 103 states have (on average 1.4368932038834952) internal successors, (148), 129 states have internal predecessors, (148), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 22:59:55,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 158 transitions. [2021-11-20 22:59:55,808 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 158 transitions. Word has length 34 [2021-11-20 22:59:55,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:59:55,809 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 158 transitions. [2021-11-20 22:59:55,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 3.6923076923076925) internal successors, (144), 33 states have internal predecessors, (144), 10 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-20 22:59:55,809 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 158 transitions. [2021-11-20 22:59:55,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 22:59:55,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:59:55,811 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:59:55,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-20 22:59:56,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-20 22:59:56,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-20 22:59:56,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:59:56,412 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 22:59:56,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:59:56,412 INFO L85 PathProgramCache]: Analyzing trace with hash 2100539922, now seen corresponding path program 1 times [2021-11-20 22:59:56,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:59:56,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944553779] [2021-11-20 22:59:56,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:59:56,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:59:56,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:59:56,413 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:59:56,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-20 22:59:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:59:56,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:59:56,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:59:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 22:59:56,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:59:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 22:59:56,848 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:59:56,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944553779] [2021-11-20 22:59:56,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944553779] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:59:56,848 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:59:56,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:59:56,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39482846] [2021-11-20 22:59:56,849 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:59:56,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:59:56,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:59:56,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:59:56,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:59:56,851 INFO L87 Difference]: Start difference. First operand 140 states and 158 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 22:59:56,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:59:56,937 INFO L93 Difference]: Finished difference Result 178 states and 193 transitions. [2021-11-20 22:59:56,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:59:56,938 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2021-11-20 22:59:56,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:59:56,940 INFO L225 Difference]: With dead ends: 178 [2021-11-20 22:59:56,940 INFO L226 Difference]: Without dead ends: 178 [2021-11-20 22:59:56,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:59:56,941 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 215 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:59:56,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 171 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:59:56,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-20 22:59:56,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 160. [2021-11-20 22:59:56,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 123 states have (on average 1.4878048780487805) internal successors, (183), 149 states have internal predecessors, (183), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 22:59:56,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 193 transitions. [2021-11-20 22:59:56,950 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 193 transitions. Word has length 34 [2021-11-20 22:59:56,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:59:56,951 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 193 transitions. [2021-11-20 22:59:56,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 22:59:56,951 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 193 transitions. [2021-11-20 22:59:56,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 22:59:56,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:59:56,953 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:59:56,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-20 22:59:57,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:59:57,165 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 22:59:57,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:59:57,166 INFO L85 PathProgramCache]: Analyzing trace with hash 692228289, now seen corresponding path program 1 times [2021-11-20 22:59:57,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:59:57,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552190303] [2021-11-20 22:59:57,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:59:57,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:59:57,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:59:57,167 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:59:57,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-20 22:59:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:59:57,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 22:59:57,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:59:57,310 INFO L388 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 [2021-11-20 22:59:57,726 INFO L388 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 28 treesize of output 20 [2021-11-20 22:59:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:59:57,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:59:57,893 INFO L388 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 29 treesize of output 21 [2021-11-20 22:59:58,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:59:58,200 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:59:58,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552190303] [2021-11-20 22:59:58,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552190303] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:59:58,201 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:59:58,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 10 [2021-11-20 22:59:58,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097176452] [2021-11-20 22:59:58,201 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:59:58,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 22:59:58,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:59:58,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 22:59:58,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-20 22:59:58,203 INFO L87 Difference]: Start difference. First operand 160 states and 193 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:00:00,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:00:00,423 INFO L93 Difference]: Finished difference Result 178 states and 195 transitions. [2021-11-20 23:00:00,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:00:00,424 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2021-11-20 23:00:00,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:00:00,425 INFO L225 Difference]: With dead ends: 178 [2021-11-20 23:00:00,426 INFO L226 Difference]: Without dead ends: 178 [2021-11-20 23:00:00,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-11-20 23:00:00,427 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 163 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:00:00,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 331 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 23:00:00,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-20 23:00:00,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 160. [2021-11-20 23:00:00,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 123 states have (on average 1.4796747967479675) internal successors, (182), 149 states have internal predecessors, (182), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 23:00:00,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 192 transitions. [2021-11-20 23:00:00,435 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 192 transitions. Word has length 35 [2021-11-20 23:00:00,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:00:00,436 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 192 transitions. [2021-11-20 23:00:00,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:00:00,436 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 192 transitions. [2021-11-20 23:00:00,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 23:00:00,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:00:00,437 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:00:00,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-20 23:00:00,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:00:00,649 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 23:00:00,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:00:00,650 INFO L85 PathProgramCache]: Analyzing trace with hash 692228290, now seen corresponding path program 1 times [2021-11-20 23:00:00,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:00:00,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706747614] [2021-11-20 23:00:00,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:00:00,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:00:00,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:00:00,652 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:00:00,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-20 23:00:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:00:00,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 23:00:00,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:00:00,828 INFO L388 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 [2021-11-20 23:00:01,408 INFO L388 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 23 [2021-11-20 23:00:01,414 INFO L388 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 20 treesize of output 12 [2021-11-20 23:00:01,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:00:01,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:00:01,928 INFO L388 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 46 treesize of output 38 [2021-11-20 23:00:01,936 INFO L388 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 34 treesize of output 18 [2021-11-20 23:00:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:00:03,403 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:00:03,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706747614] [2021-11-20 23:00:03,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706747614] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:00:03,404 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:00:03,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 19 [2021-11-20 23:00:03,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561522377] [2021-11-20 23:00:03,404 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:00:03,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 23:00:03,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:00:03,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 23:00:03,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-11-20 23:00:03,406 INFO L87 Difference]: Start difference. First operand 160 states and 192 transitions. Second operand has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:00:07,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:00:07,274 INFO L93 Difference]: Finished difference Result 170 states and 191 transitions. [2021-11-20 23:00:07,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:00:07,276 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2021-11-20 23:00:07,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:00:07,277 INFO L225 Difference]: With dead ends: 170 [2021-11-20 23:00:07,277 INFO L226 Difference]: Without dead ends: 170 [2021-11-20 23:00:07,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-11-20 23:00:07,279 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 549 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:00:07,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 377 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-20 23:00:07,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-20 23:00:07,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2021-11-20 23:00:07,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 123 states have (on average 1.4715447154471544) internal successors, (181), 149 states have internal predecessors, (181), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 23:00:07,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 191 transitions. [2021-11-20 23:00:07,286 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 191 transitions. Word has length 35 [2021-11-20 23:00:07,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:00:07,287 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 191 transitions. [2021-11-20 23:00:07,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:00:07,287 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 191 transitions. [2021-11-20 23:00:07,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 23:00:07,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:00:07,289 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:00:07,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-20 23:00:07,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:00:07,503 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 23:00:07,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:00:07,503 INFO L85 PathProgramCache]: Analyzing trace with hash -488544317, now seen corresponding path program 1 times [2021-11-20 23:00:07,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:00:07,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202357342] [2021-11-20 23:00:07,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:00:07,504 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:00:07,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:00:07,504 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:00:07,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-20 23:00:07,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:00:07,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:00:07,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:00:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:00:07,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:00:07,970 INFO L388 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 8 treesize of output 6 [2021-11-20 23:00:08,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:00:08,231 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:00:08,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202357342] [2021-11-20 23:00:08,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202357342] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:00:08,231 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:00:08,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-20 23:00:08,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605051370] [2021-11-20 23:00:08,232 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:00:08,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:00:08,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:00:08,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:00:08,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:00:08,233 INFO L87 Difference]: Start difference. First operand 160 states and 191 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 23:00:08,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:00:08,608 INFO L93 Difference]: Finished difference Result 159 states and 189 transitions. [2021-11-20 23:00:08,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:00:08,609 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2021-11-20 23:00:08,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:00:08,610 INFO L225 Difference]: With dead ends: 159 [2021-11-20 23:00:08,611 INFO L226 Difference]: Without dead ends: 159 [2021-11-20 23:00:08,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:00:08,612 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 200 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:00:08,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 114 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:00:08,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-20 23:00:08,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2021-11-20 23:00:08,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 123 states have (on average 1.4552845528455285) internal successors, (179), 148 states have internal predecessors, (179), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 23:00:08,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 189 transitions. [2021-11-20 23:00:08,620 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 189 transitions. Word has length 37 [2021-11-20 23:00:08,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:00:08,620 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 189 transitions. [2021-11-20 23:00:08,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 23:00:08,621 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 189 transitions. [2021-11-20 23:00:08,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 23:00:08,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:00:08,622 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:00:08,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-20 23:00:08,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:00:08,835 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 23:00:08,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:00:08,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1420434319, now seen corresponding path program 1 times [2021-11-20 23:00:08,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:00:08,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243874991] [2021-11-20 23:00:08,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:00:08,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:00:08,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:00:08,836 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:00:08,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-20 23:00:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:00:08,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 23:00:08,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:00:08,975 INFO L388 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 [2021-11-20 23:00:09,362 INFO L388 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 28 treesize of output 20 [2021-11-20 23:00:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:00:09,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:00:09,524 INFO L388 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 29 treesize of output 21 [2021-11-20 23:00:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:00:09,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:00:09,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243874991] [2021-11-20 23:00:09,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243874991] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:00:09,820 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:00:09,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 10 [2021-11-20 23:00:09,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552216121] [2021-11-20 23:00:09,820 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:00:09,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 23:00:09,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:00:09,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 23:00:09,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:00:09,821 INFO L87 Difference]: Start difference. First operand 159 states and 189 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:00:12,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:00:12,127 INFO L93 Difference]: Finished difference Result 174 states and 191 transitions. [2021-11-20 23:00:12,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:00:12,129 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2021-11-20 23:00:12,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:00:12,130 INFO L225 Difference]: With dead ends: 174 [2021-11-20 23:00:12,130 INFO L226 Difference]: Without dead ends: 174 [2021-11-20 23:00:12,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-11-20 23:00:12,131 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 143 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:00:12,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 328 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 23:00:12,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-20 23:00:12,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 159. [2021-11-20 23:00:12,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 123 states have (on average 1.4471544715447155) internal successors, (178), 148 states have internal predecessors, (178), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 23:00:12,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 188 transitions. [2021-11-20 23:00:12,140 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 188 transitions. Word has length 40 [2021-11-20 23:00:12,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:00:12,140 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 188 transitions. [2021-11-20 23:00:12,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:00:12,141 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 188 transitions. [2021-11-20 23:00:12,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 23:00:12,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:00:12,142 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:00:12,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-20 23:00:12,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:00:12,345 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 23:00:12,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:00:12,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1420434320, now seen corresponding path program 1 times [2021-11-20 23:00:12,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:00:12,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1493734581] [2021-11-20 23:00:12,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:00:12,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:00:12,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:00:12,347 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:00:12,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-20 23:00:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:00:12,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 23:00:12,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:00:12,499 INFO L388 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 [2021-11-20 23:00:13,177 INFO L388 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 23 [2021-11-20 23:00:13,183 INFO L388 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 20 treesize of output 12 [2021-11-20 23:00:13,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:00:13,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:00:13,845 INFO L388 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 48 treesize of output 40 [2021-11-20 23:00:13,853 INFO L388 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 20 [2021-11-20 23:00:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:00:15,306 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:00:15,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1493734581] [2021-11-20 23:00:15,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1493734581] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:00:15,306 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:00:15,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 19 [2021-11-20 23:00:15,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500277454] [2021-11-20 23:00:15,307 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:00:15,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 23:00:15,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:00:15,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 23:00:15,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-11-20 23:00:15,308 INFO L87 Difference]: Start difference. First operand 159 states and 188 transitions. Second operand has 20 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:00:19,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:00:19,934 INFO L93 Difference]: Finished difference Result 169 states and 190 transitions. [2021-11-20 23:00:19,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 23:00:19,936 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2021-11-20 23:00:19,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:00:19,937 INFO L225 Difference]: With dead ends: 169 [2021-11-20 23:00:19,937 INFO L226 Difference]: Without dead ends: 169 [2021-11-20 23:00:19,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-11-20 23:00:19,939 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 360 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:00:19,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 510 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-20 23:00:19,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-20 23:00:19,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 159. [2021-11-20 23:00:19,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 123 states have (on average 1.4390243902439024) internal successors, (177), 148 states have internal predecessors, (177), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 23:00:19,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 187 transitions. [2021-11-20 23:00:19,946 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 187 transitions. Word has length 40 [2021-11-20 23:00:19,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:00:19,946 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 187 transitions. [2021-11-20 23:00:19,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:00:19,947 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 187 transitions. [2021-11-20 23:00:19,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 23:00:19,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:00:19,948 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:00:19,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-20 23:00:20,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:00:20,161 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 23:00:20,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:00:20,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1420420416, now seen corresponding path program 1 times [2021-11-20 23:00:20,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:00:20,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573151371] [2021-11-20 23:00:20,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:00:20,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:00:20,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:00:20,162 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:00:20,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-20 23:00:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:00:20,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 23:00:20,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:00:20,655 INFO L388 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 [2021-11-20 23:00:20,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:00:20,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:00:20,766 INFO L388 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 16 treesize of output 8 [2021-11-20 23:00:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:00:20,965 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:00:20,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573151371] [2021-11-20 23:00:20,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573151371] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:00:20,966 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:00:20,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 10 [2021-11-20 23:00:20,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937185508] [2021-11-20 23:00:20,966 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:00:20,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 23:00:20,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:00:20,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 23:00:20,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:00:20,967 INFO L87 Difference]: Start difference. First operand 159 states and 187 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:00:22,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:00:22,774 INFO L93 Difference]: Finished difference Result 204 states and 233 transitions. [2021-11-20 23:00:22,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 23:00:22,776 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2021-11-20 23:00:22,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:00:22,778 INFO L225 Difference]: With dead ends: 204 [2021-11-20 23:00:22,778 INFO L226 Difference]: Without dead ends: 204 [2021-11-20 23:00:22,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-11-20 23:00:22,779 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 367 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:00:22,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 376 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 23:00:22,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-20 23:00:22,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 173. [2021-11-20 23:00:22,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 137 states have (on average 1.4525547445255473) internal successors, (199), 162 states have internal predecessors, (199), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 23:00:22,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 209 transitions. [2021-11-20 23:00:22,787 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 209 transitions. Word has length 40 [2021-11-20 23:00:22,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:00:22,788 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 209 transitions. [2021-11-20 23:00:22,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:00:22,788 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 209 transitions. [2021-11-20 23:00:22,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 23:00:22,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:00:22,789 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:00:22,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-20 23:00:22,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:00:22,993 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 23:00:22,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:00:22,994 INFO L85 PathProgramCache]: Analyzing trace with hash 449018579, now seen corresponding path program 1 times [2021-11-20 23:00:22,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:00:22,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658492526] [2021-11-20 23:00:22,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:00:22,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:00:22,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:00:22,995 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:00:22,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-20 23:00:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:00:23,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:00:23,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:00:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:00:23,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:00:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 23:00:23,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:00:23,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658492526] [2021-11-20 23:00:23,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658492526] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:00:23,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [451499142] [2021-11-20 23:00:23,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:00:23,426 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:00:23,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:00:23,426 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:00:23,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-20 23:00:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:00:23,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:00:23,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:00:23,699 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:00:23,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:00:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 23:00:23,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [451499142] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:00:23,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737538584] [2021-11-20 23:00:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:00:23,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:00:23,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:00:23,841 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:00:23,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-20 23:00:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:00:23,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:00:23,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:00:24,052 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:00:24,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:00:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 23:00:24,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737538584] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:00:24,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:00:24,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-20 23:00:24,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475848388] [2021-11-20 23:00:24,190 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:00:24,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:00:24,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:00:24,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:00:24,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:00:24,191 INFO L87 Difference]: Start difference. First operand 173 states and 209 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 23:00:24,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:00:24,221 INFO L93 Difference]: Finished difference Result 117 states and 139 transitions. [2021-11-20 23:00:24,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:00:24,231 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-11-20 23:00:24,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:00:24,233 INFO L225 Difference]: With dead ends: 117 [2021-11-20 23:00:24,233 INFO L226 Difference]: Without dead ends: 117 [2021-11-20 23:00:24,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:00:24,234 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 108 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:00:24,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 159 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:00:24,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-20 23:00:24,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-11-20 23:00:24,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 91 states have (on average 1.4835164835164836) internal successors, (135), 112 states have internal predecessors, (135), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:00:24,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 139 transitions. [2021-11-20 23:00:24,239 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 139 transitions. Word has length 41 [2021-11-20 23:00:24,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:00:24,239 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 139 transitions. [2021-11-20 23:00:24,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 23:00:24,239 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 139 transitions. [2021-11-20 23:00:24,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 23:00:24,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:00:24,240 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:00:24,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-20 23:00:24,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-20 23:00:24,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-20 23:00:24,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:00:24,866 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 23:00:24,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:00:24,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1083360035, now seen corresponding path program 1 times [2021-11-20 23:00:24,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:00:24,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320230179] [2021-11-20 23:00:24,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:00:24,867 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:00:24,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:00:24,867 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:00:24,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-20 23:00:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:00:25,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 23:00:25,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:00:26,529 INFO L388 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 [2021-11-20 23:00:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:00:26,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:00:26,928 INFO L388 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 16 treesize of output 8 [2021-11-20 23:00:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:00:27,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:00:27,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320230179] [2021-11-20 23:00:27,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320230179] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:00:27,699 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:00:27,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 10] imperfect sequences [] total 21 [2021-11-20 23:00:27,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027613889] [2021-11-20 23:00:27,699 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:00:27,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 23:00:27,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:00:27,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 23:00:27,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-20 23:00:27,701 INFO L87 Difference]: Start difference. First operand 117 states and 139 transitions. Second operand has 22 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 23:00:27,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:00:27,914 INFO L93 Difference]: Finished difference Result 127 states and 148 transitions. [2021-11-20 23:00:27,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 23:00:27,916 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2021-11-20 23:00:27,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:00:27,917 INFO L225 Difference]: With dead ends: 127 [2021-11-20 23:00:27,917 INFO L226 Difference]: Without dead ends: 127 [2021-11-20 23:00:27,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-20 23:00:27,918 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 25 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:00:27,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 464 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2021-11-20 23:00:27,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-20 23:00:27,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 117. [2021-11-20 23:00:27,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 91 states have (on average 1.4725274725274726) internal successors, (134), 112 states have internal predecessors, (134), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:00:27,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 138 transitions. [2021-11-20 23:00:27,923 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 138 transitions. Word has length 41 [2021-11-20 23:00:27,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:00:27,923 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 138 transitions. [2021-11-20 23:00:27,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 23:00:27,924 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2021-11-20 23:00:27,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 23:00:27,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:00:27,924 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:00:27,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-20 23:00:28,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:00:28,125 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-20 23:00:28,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:00:28,125 INFO L85 PathProgramCache]: Analyzing trace with hash -762217872, now seen corresponding path program 1 times [2021-11-20 23:00:28,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:00:28,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21436268] [2021-11-20 23:00:28,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:00:28,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:00:28,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:00:28,127 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:00:28,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-20 23:00:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:00:28,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-20 23:00:28,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:00:28,387 INFO L388 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 [2021-11-20 23:00:28,944 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:00:28,945 INFO L388 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 19 treesize of output 19 [2021-11-20 23:00:29,201 INFO L388 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 11 treesize of output 7 [2021-11-20 23:00:29,342 INFO L388 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 [2021-11-20 23:00:29,707 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-20 23:00:29,707 INFO L388 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 28 treesize of output 30 [2021-11-20 23:00:29,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:00:29,884 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-11-20 23:00:29,884 INFO L388 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 52 treesize of output 45 [2021-11-20 23:00:30,691 INFO L388 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 96 treesize of output 88 [2021-11-20 23:00:31,018 INFO L354 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2021-11-20 23:00:31,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 48 [2021-11-20 23:00:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:00:31,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:00:32,085 INFO L388 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 45 treesize of output 37 [2021-11-20 23:01:11,658 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)))) (store .cse2 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|))) (or (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select .cse0 .cse1) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)))))))))))))))) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse1)))))) is different from false [2021-11-20 23:01:13,724 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse2 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select .cse0 .cse1) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))))))))))))))) (_ bv1 1))) (not (= .cse1 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))))) is different from false [2021-11-20 23:01:13,795 INFO L354 Elim1Store]: treesize reduction 5, result has 96.6 percent of original size [2021-11-20 23:01:13,795 INFO L388 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 247 treesize of output 246 [2021-11-20 23:01:15,853 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| (_ BitVec 32))) (let ((.cse0 (let ((.cse2 (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (bvadd (_ bv4 32) |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse3 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse3 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))))) (store .cse2 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|))) (or (= (select (select .cse0 .cse1) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (not (= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| .cse1)))))) is different from false [2021-11-20 23:01:16,276 INFO L354 Elim1Store]: treesize reduction 50, result has 46.2 percent of original size [2021-11-20 23:01:16,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 1513707 treesize of output 1488681 [2021-11-20 23:02:53,984 WARN L227 SmtUtils]: Spent 1.63m on a formula simplification. DAG size of input: 527 DAG size of output: 517 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 23:02:54,298 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:02:54,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21436268] [2021-11-20 23:02:54,299 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 23:02:54,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1060881966] [2021-11-20 23:02:54,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:02:54,299 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:02:54,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:02:54,317 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:02:54,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-20 23:02:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:02:54,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-20 23:02:54,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:02:54,837 INFO L388 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 [2021-11-20 23:02:55,781 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 23:02:55,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-11-20 23:02:56,297 INFO L388 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 11 treesize of output 7 [2021-11-20 23:02:56,634 INFO L388 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 [2021-11-20 23:02:57,504 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-20 23:02:57,504 INFO L388 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 28 treesize of output 30 [2021-11-20 23:02:57,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,829 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-11-20 23:02:57,830 INFO L388 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 55 treesize of output 48 [2021-11-20 23:02:59,250 INFO L388 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 125 treesize of output 117 [2021-11-20 23:02:59,665 INFO L354 Elim1Store]: treesize reduction 47, result has 7.8 percent of original size [2021-11-20 23:02:59,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 115 treesize of output 59 [2021-11-20 23:03:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:03:00,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:03:00,566 INFO L388 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 45 treesize of output 37 [2021-11-20 23:03:47,599 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)))) (store .cse2 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select .cse0 .cse1) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)))))))))))) (_ bv1 1))) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse1)))))) is different from false [2021-11-20 23:04:39,088 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| (_ BitVec 32))) (let ((.cse0 (let ((.cse2 (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (bvadd (_ bv4 32) |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse3 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse3 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))))) (store .cse2 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select .cse0 .cse1) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|)))))))))))))))) (not (= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| .cse1)))))) is different from false [2021-11-20 23:04:39,672 INFO L354 Elim1Store]: treesize reduction 22, result has 76.3 percent of original size [2021-11-20 23:04:39,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 778763 treesize of output 766309 [2021-11-20 23:05:24,512 WARN L227 SmtUtils]: Spent 44.84s on a formula simplification. DAG size of input: 626 DAG size of output: 616 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 23:05:24,835 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 23:05:24,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949804282] [2021-11-20 23:05:24,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:05:24,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:05:24,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:05:24,840 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:05:24,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390355da-5d32-4606-a429-39508b7fe775/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-20 23:05:24,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:05:24,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-20 23:05:24,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:05:24,943 INFO L388 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 [2021-11-20 23:05:25,525 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:05:25,525 INFO L388 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 18 treesize of output 18 [2021-11-20 23:05:26,020 INFO L388 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 11 treesize of output 7 [2021-11-20 23:05:26,321 INFO L388 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 [2021-11-20 23:05:27,081 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-20 23:05:27,081 INFO L388 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 37 [2021-11-20 23:05:27,526 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-20 23:05:27,526 INFO L388 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 48 [2021-11-20 23:05:29,244 INFO L388 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 121 treesize of output 97 [2021-11-20 23:05:29,816 INFO L354 Elim1Store]: treesize reduction 60, result has 25.9 percent of original size [2021-11-20 23:05:29,816 INFO L388 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 54 [2021-11-20 23:05:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:05:30,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:05:30,434 INFO L388 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 45 treesize of output 37